node_modules

author: Florian Dold <florian.dold@gmail.com> 2017-08-14 05:01:11 +0200
committer: Florian Dold <florian.dold@gmail.com> 2017-08-14 05:02:09 +0200
commit: 363723fc84f7b8477592e0105aeb331ec9a017af (patch)
tree: 29f92724f34131bac64d6a318dd7e30612e631c7 /node_modules/acorn
parent: 5634e77ad96bfe1818f6b6ee70b7379652e5487f (diff)
download: wallet-core-363723fc84f7b8477592e0105aeb331ec9a017af.tar.xz
40 files changed, 5371 insertions, 10212 deletions
diff --git a/node_modules/acorn/.npmignore b/node_modules/acorn/.npmignore
index eb3644b3a..243d17d19 100644
--- a/node_modules/acorn/.npmignore
+++ b/node_modules/acorn/.npmignore
@@ -8,3 +8,4 @@
 .gitattributes
 .tern-project
 .travis.yml
+/src
diff --git a/node_modules/acorn/AUTHORS b/node_modules/acorn/AUTHORS
index 1377f6034..7b9f6a14b 100644
--- a/node_modules/acorn/AUTHORS
+++ b/node_modules/acorn/AUTHORS
@@ -8,12 +8,14 @@ Angelo
 Aparajita Fishman
 Arian Stolwijk
 Artem Govorov
+Bradley Heinz
 Brandon Mills
 Charles Hughes
 Conrad Irwin
 Daniel Tschinder
 David Bonnet
 Domenico Matteo
+ehmicky
 Forbes Lindesay
 Gilad Peleg
 impinball
@@ -32,6 +34,7 @@ Keheliya Gallaba
 Kevin Irish
 Kevin Kwok
 krator
+Marek
 Marijn Haverbeke
 Martin Carlberg
 Mat Garcia
@@ -60,5 +63,6 @@ Simen Bekkhus
 Teddy Katz
 Timothy Gu
 Toru Nagashima
+Victor Homyakov
 Wexpo Lyu
 zsjforcn
diff --git a/node_modules/acorn/CHANGELOG.md b/node_modules/acorn/CHANGELOG.md
index 6b5834a0c..34d1ac780 100644
--- a/node_modules/acorn/CHANGELOG.md
+++ b/node_modules/acorn/CHANGELOG.md
@@ -1,3 +1,31 @@
+## 5.1.1 (2017-07-06)
+
+### Bug fixes
+
+Fix problem with disambiguating regexp and division after a class.
+
+## 5.1.0 (2017-07-05)
+
+### Bug fixes
+
+Fix tokenizing of regexps in an object-desctructuring `for`/`of` loop and after `yield`.
+
+Parse zero-prefixed numbers with non-octal digits as decimal.
+
+Allow object/array patterns in rest parameters.
+
+Don't error when `yield` is used as a property name.
+
+Allow `async` as a shorthand object property.
+
+Make the ES module version of the loose parser actually work.
+
+### New features
+
+Implement the [template literal revision proposal](https://github.com/tc39/proposal-template-literal-revision) for ES9.
+
+New walker functions `full` and `fullAncestor`.
+
 ## 5.0.3 (2017-04-01)
 
 ### Bug fixes
diff --git a/node_modules/acorn/LICENSE b/node_modules/acorn/LICENSE
index a35ebf44f..3f0186552 100644
--- a/node_modules/acorn/LICENSE
+++ b/node_modules/acorn/LICENSE
@@ -1,4 +1,4 @@
-Copyright (C) 2012-2016 by various contributors (see AUTHORS)
+Copyright (C) 2012-2017 by various contributors (see AUTHORS)
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
diff --git a/node_modules/acorn/README.md b/node_modules/acorn/README.md
index b7efe2341..bd853c43b 100644
--- a/node_modules/acorn/README.md
+++ b/node_modules/acorn/README.md
@@ -63,9 +63,9 @@ object referring to that same position.
 [estree]: https://github.com/estree/estree
 
 - **ecmaVersion**: Indicates the ECMAScript version to parse. Must be
-  either 3, 5, 6 (2015), 7 (2016), or 8 (2017). This influences support for strict
-  mode, the set of reserved words, and support for new syntax features.
-  Default is 7.
+  either 3, 5, 6 (2015), 7 (2016), 8 (2017), or 9 (2018, partial
+  support). This influences support for strict mode, the set of
+  reserved words, and support for new syntax features. Default is 7.
 
   **NOTE**: Only 'stage 4' (finalized) ECMAScript features are being
   implemented by Acorn.
@@ -268,10 +268,33 @@ simply visit all statements and expressions and not produce a
 meaningful state. (An example of a use of state is to track scope at
 each point in the tree.)
 
+```js
+const acorn = require("acorn")
+const walk = require("acorn/dist/walk")
+
+walk.simple(acorn.parse("let x = 10"), {
+  Literal(node) {
+    console.log(`Found a literal: ${node.value}`)
+  }
+})
+```
+
 **ancestor**`(node, visitors, base, state)` does a 'simple' walk over
 a tree, building up an array of ancestor nodes (including the current node)
 and passing the array to the callbacks as a third parameter.
 
+```js
+const acorn = require("acorn")
+const walk = require("acorn/dist/walk")
+
+walk.ancestor(acorn.parse("foo('hi')"), {
+  Literal(_, ancestors) {
+    console.log("This literal's ancestors are:",
+                ancestors.map(n => n.type))
+  }
+})
+```
+
 **recursive**`(node, state, functions, base)` does a 'recursive'
 walk, where the walker functions are responsible for continuing the
 walk on the child nodes of their target node. `state` is the start
@@ -287,6 +310,23 @@ default walkers will be used.
 walker functions in `functions` and filling in the missing ones by
 taking defaults from `base`.
 
+**full**`(node, callback, base, state)` does a 'full'
+walk over a tree, calling the callback with the arguments (node, state, type)
+for each node
+
+**fullAncestor**`(node, callback, base, state)` does a 'full' walk over
+a tree, building up an array of ancestor nodes (including the current node)
+and passing the array to the callbacks as a third parameter.
+
+```js
+const acorn = require("acorn")
+const walk = require("acorn/dist/walk")
+
+walk.full(acorn.parse("1 + 1"), node => {
+  console.log(`There's a ${node.type} node at ${node.ch}`)
+})
+```
+
 **findNodeAt**`(node, start, end, test, base, state)` tries to
 locate a node in a tree at the given start and/or end offsets, which
 satisfies the predicate `test`. `start` and `end` can be either `null`
@@ -407,3 +447,6 @@ looseParser.extend("readToken", function(nextMethod) {
  - [`acorn-object-spread`](https://github.com/UXtemple/acorn-object-spread): Parse [object spread syntax proposal](https://github.com/sebmarkbage/ecmascript-rest-spread)
  - [`acorn-es7`](https://www.npmjs.com/package/acorn-es7): Parse [decorator syntax proposal](https://github.com/wycats/javascript-decorators)
  - [`acorn-objj`](https://www.npmjs.com/package/acorn-objj): [Objective-J](http://www.cappuccino-project.org/learn/objective-j.html) language parser built as Acorn plugin
+ - [`acorn-object-rest-spread`](https://github.com/victor-homyakov/acorn-object-rest-spread) Parse [Object Rest/Spread Properties proposal](https://github.com/tc39/proposal-object-rest-spread), works with latest Acorn version (5.0.3)
+ - [`acorn-static-class-property-initializer`](https://github.com/victor-homyakov/acorn-static-class-property-initializer) Partial support for static class properties from [ES Class Fields & Static Properties Proposal](https://github.com/tc39/proposal-class-public-fields) to support static property initializers in [React components written as ES6+ classes](https://babeljs.io/blog/2015/06/07/react-on-es6-plus)
+ 
diff --git a/node_modules/acorn/bin/acorn b/node_modules/acorn/bin/acorn
index 41b786f42..257195780 100755
--- a/node_modules/acorn/bin/acorn
+++ b/node_modules/acorn/bin/acorn
@@ -10,60 +10,60 @@ var forceFile;
 var silent = false;
 var compact = false;
 var tokenize = false;
-var options = {}
+var options = {};
 
 function help(status) {
-  var print = (status == 0) ? console.log : console.error
-  print("usage: " + path.basename(process.argv[1]) + " [--ecma3|--ecma5|--ecma6|--ecma7|...|--ecma2015|--ecma2016|...]")
-  print("        [--tokenize] [--locations] [---allow-hash-bang] [--compact] [--silent] [--module] [--help] [--] [infile]")
-  process.exit(status)
+  var print = (status == 0) ? console.log : console.error;
+  print("usage: " + path.basename(process.argv[1]) + " [--ecma3|--ecma5|--ecma6|--ecma7|...|--ecma2015|--ecma2016|...]");
+  print("        [--tokenize] [--locations] [---allow-hash-bang] [--compact] [--silent] [--module] [--help] [--] [infile]");
+  process.exit(status);
 }
 
 for (var i = 2; i < process.argv.length; ++i) {
-  var arg = process.argv[i]
-  if ((arg == "-" || arg[0] != "-") && !infile) infile = arg
-  else if (arg == "--" && !infile && i + 2 == process.argv.length) forceFile = infile = process.argv[++i]
-  else if (arg == "--locations") options.locations = true
-  else if (arg == "--allow-hash-bang") options.allowHashBang = true
-  else if (arg == "--silent") silent = true
-  else if (arg == "--compact") compact = true
-  else if (arg == "--help") help(0)
-  else if (arg == "--tokenize") tokenize = true
-  else if (arg == "--module") options.sourceType = "module"
+  var arg = process.argv[i];
+  if ((arg == "-" || arg[0] != "-") && !infile) { infile = arg; }
+  else if (arg == "--" && !infile && i + 2 == process.argv.length) { forceFile = infile = process.argv[++i]; }
+  else if (arg == "--locations") { options.locations = true; }
+  else if (arg == "--allow-hash-bang") { options.allowHashBang = true; }
+  else if (arg == "--silent") { silent = true; }
+  else if (arg == "--compact") { compact = true; }
+  else if (arg == "--help") { help(0); }
+  else if (arg == "--tokenize") { tokenize = true; }
+  else if (arg == "--module") { options.sourceType = "module"; }
   else {
-    var match = arg.match(/^--ecma(\d+)$/)
+    var match = arg.match(/^--ecma(\d+)$/);
     if (match)
-      options.ecmaVersion = +match[1]
+      { options.ecmaVersion = +match[1]; }
     else
-      help(1)
+      { help(1); }
   }
 }
 
 function run(code) {
-  var result
+  var result;
   try {
     if (!tokenize) {
-      result = acorn.parse(code, options)
+      result = acorn.parse(code, options);
     } else {
-      result = []
-      var tokenizer = acorn.tokenizer(code, options), token
+      result = [];
+      var tokenizer$$1 = acorn.tokenizer(code, options), token;
       do {
-        token = tokenizer.getToken()
-        result.push(token)
+        token = tokenizer$$1.getToken();
+        result.push(token);
       } while (token.type != acorn.tokTypes.eof)
     }
   } catch (e) {
-    console.error(e.message)
-    process.exit(1)
+    console.error(e.message);
+    process.exit(1);
   }
-  if (!silent) console.log(JSON.stringify(result, null, compact ? null : 2))
+  if (!silent) { console.log(JSON.stringify(result, null, compact ? null : 2)); }
 }
 
 if (forceFile || infile && infile != "-") {
-  run(fs.readFileSync(infile, "utf8"))
+  run(fs.readFileSync(infile, "utf8"));
 } else {
-  var code = ""
-  process.stdin.resume()
-  process.stdin.on("data", function (chunk) { return code += chunk; })
-  process.stdin.on("end", function () { return run(code); })
-}
-\ No newline at end of file
+  var code = "";
+  process.stdin.resume();
+  process.stdin.on("data", function (chunk) { return code += chunk; });
+  process.stdin.on("end", function () { return run(code); });
+}
diff --git a/node_modules/acorn/dist/acorn.es.js b/node_modules/acorn/dist/acorn.es.js
index 74417b8aa..5b5977671 100644
--- a/node_modules/acorn/dist/acorn.es.js
+++ b/node_modules/acorn/dist/acorn.es.js
@@ -6,16 +6,16 @@ var reservedWords = {
   6: "enum",
   strict: "implements interface let package private protected public static yield",
   strictBind: "eval arguments"
-}
+};
 
 // And the keywords
 
-var ecma5AndLessKeywords = "break case catch continue debugger default do else finally for function if return switch throw try var while with null true false instanceof typeof void delete new in this"
+var ecma5AndLessKeywords = "break case catch continue debugger default do else finally for function if return switch throw try var while with null true false instanceof typeof void delete new in this";
 
 var keywords = {
   5: ecma5AndLessKeywords,
   6: ecma5AndLessKeywords + " const class extends export import super"
-}
+};
 
 // ## Character categories
 
@@ -25,13 +25,13 @@ var keywords = {
 // code point above 128.
 // Generated by `bin/generate-identifier-regex.js`.
 
-var nonASCIIidentifierStartChars = "\xaa\xb5\xba\xc0-\xd6\xd8-\xf6\xf8-\u02c1\u02c6-\u02d1\u02e0-\u02e4\u02ec\u02ee\u0370-\u0374\u0376\u0377\u037a-\u037d\u037f\u0386\u0388-\u038a\u038c\u038e-\u03a1\u03a3-\u03f5\u03f7-\u0481\u048a-\u052f\u0531-\u0556\u0559\u0561-\u0587\u05d0-\u05ea\u05f0-\u05f2\u0620-\u064a\u066e\u066f\u0671-\u06d3\u06d5\u06e5\u06e6\u06ee\u06ef\u06fa-\u06fc\u06ff\u0710\u0712-\u072f\u074d-\u07a5\u07b1\u07ca-\u07ea\u07f4\u07f5\u07fa\u0800-\u0815\u081a\u0824\u0828\u0840-\u0858\u08a0-\u08b4\u08b6-\u08bd\u0904-\u0939\u093d\u0950\u0958-\u0961\u0971-\u0980\u0985-\u098c\u098f\u0990\u0993-\u09a8\u09aa-\u09b0\u09b2\u09b6-\u09b9\u09bd\u09ce\u09dc\u09dd\u09df-\u09e1\u09f0\u09f1\u0a05-\u0a0a\u0a0f\u0a10\u0a13-\u0a28\u0a2a-\u0a30\u0a32\u0a33\u0a35\u0a36\u0a38\u0a39\u0a59-\u0a5c\u0a5e\u0a72-\u0a74\u0a85-\u0a8d\u0a8f-\u0a91\u0a93-\u0aa8\u0aaa-\u0ab0\u0ab2\u0ab3\u0ab5-\u0ab9\u0abd\u0ad0\u0ae0\u0ae1\u0af9\u0b05-\u0b0c\u0b0f\u0b10\u0b13-\u0b28\u0b2a-\u0b30\u0b32\u0b33\u0b35-\u0b39\u0b3d\u0b5c\u0b5d\u0b5f-\u0b61\u0b71\u0b83\u0b85-\u0b8a\u0b8e-\u0b90\u0b92-\u0b95\u0b99\u0b9a\u0b9c\u0b9e\u0b9f\u0ba3\u0ba4\u0ba8-\u0baa\u0bae-\u0bb9\u0bd0\u0c05-\u0c0c\u0c0e-\u0c10\u0c12-\u0c28\u0c2a-\u0c39\u0c3d\u0c58-\u0c5a\u0c60\u0c61\u0c80\u0c85-\u0c8c\u0c8e-\u0c90\u0c92-\u0ca8\u0caa-\u0cb3\u0cb5-\u0cb9\u0cbd\u0cde\u0ce0\u0ce1\u0cf1\u0cf2\u0d05-\u0d0c\u0d0e-\u0d10\u0d12-\u0d3a\u0d3d\u0d4e\u0d54-\u0d56\u0d5f-\u0d61\u0d7a-\u0d7f\u0d85-\u0d96\u0d9a-\u0db1\u0db3-\u0dbb\u0dbd\u0dc0-\u0dc6\u0e01-\u0e30\u0e32\u0e33\u0e40-\u0e46\u0e81\u0e82\u0e84\u0e87\u0e88\u0e8a\u0e8d\u0e94-\u0e97\u0e99-\u0e9f\u0ea1-\u0ea3\u0ea5\u0ea7\u0eaa\u0eab\u0ead-\u0eb0\u0eb2\u0eb3\u0ebd\u0ec0-\u0ec4\u0ec6\u0edc-\u0edf\u0f00\u0f40-\u0f47\u0f49-\u0f6c\u0f88-\u0f8c\u1000-\u102a\u103f\u1050-\u1055\u105a-\u105d\u1061\u1065\u1066\u106e-\u1070\u1075-\u1081\u108e\u10a0-\u10c5\u10c7\u10cd\u10d0-\u10fa\u10fc-\u1248\u124a-\u124d\u1250-\u1256\u1258\u125a-\u125d\u1260-\u1288\u128a-\u128d\u1290-\u12b0\u12b2-\u12b5\u12b8-\u12be\u12c0\u12c2-\u12c5\u12c8-\u12d6\u12d8-\u1310\u1312-\u1315\u1318-\u135a\u1380-\u138f\u13a0-\u13f5\u13f8-\u13fd\u1401-\u166c\u166f-\u167f\u1681-\u169a\u16a0-\u16ea\u16ee-\u16f8\u1700-\u170c\u170e-\u1711\u1720-\u1731\u1740-\u1751\u1760-\u176c\u176e-\u1770\u1780-\u17b3\u17d7\u17dc\u1820-\u1877\u1880-\u18a8\u18aa\u18b0-\u18f5\u1900-\u191e\u1950-\u196d\u1970-\u1974\u1980-\u19ab\u19b0-\u19c9\u1a00-\u1a16\u1a20-\u1a54\u1aa7\u1b05-\u1b33\u1b45-\u1b4b\u1b83-\u1ba0\u1bae\u1baf\u1bba-\u1be5\u1c00-\u1c23\u1c4d-\u1c4f\u1c5a-\u1c7d\u1c80-\u1c88\u1ce9-\u1cec\u1cee-\u1cf1\u1cf5\u1cf6\u1d00-\u1dbf\u1e00-\u1f15\u1f18-\u1f1d\u1f20-\u1f45\u1f48-\u1f4d\u1f50-\u1f57\u1f59\u1f5b\u1f5d\u1f5f-\u1f7d\u1f80-\u1fb4\u1fb6-\u1fbc\u1fbe\u1fc2-\u1fc4\u1fc6-\u1fcc\u1fd0-\u1fd3\u1fd6-\u1fdb\u1fe0-\u1fec\u1ff2-\u1ff4\u1ff6-\u1ffc\u2071\u207f\u2090-\u209c\u2102\u2107\u210a-\u2113\u2115\u2118-\u211d\u2124\u2126\u2128\u212a-\u2139\u213c-\u213f\u2145-\u2149\u214e\u2160-\u2188\u2c00-\u2c2e\u2c30-\u2c5e\u2c60-\u2ce4\u2ceb-\u2cee\u2cf2\u2cf3\u2d00-\u2d25\u2d27\u2d2d\u2d30-\u2d67\u2d6f\u2d80-\u2d96\u2da0-\u2da6\u2da8-\u2dae\u2db0-\u2db6\u2db8-\u2dbe\u2dc0-\u2dc6\u2dc8-\u2dce\u2dd0-\u2dd6\u2dd8-\u2dde\u3005-\u3007\u3021-\u3029\u3031-\u3035\u3038-\u303c\u3041-\u3096\u309b-\u309f\u30a1-\u30fa\u30fc-\u30ff\u3105-\u312d\u3131-\u318e\u31a0-\u31ba\u31f0-\u31ff\u3400-\u4db5\u4e00-\u9fd5\ua000-\ua48c\ua4d0-\ua4fd\ua500-\ua60c\ua610-\ua61f\ua62a\ua62b\ua640-\ua66e\ua67f-\ua69d\ua6a0-\ua6ef\ua717-\ua71f\ua722-\ua788\ua78b-\ua7ae\ua7b0-\ua7b7\ua7f7-\ua801\ua803-\ua805\ua807-\ua80a\ua80c-\ua822\ua840-\ua873\ua882-\ua8b3\ua8f2-\ua8f7\ua8fb\ua8fd\ua90a-\ua925\ua930-\ua946\ua960-\ua97c\ua984-\ua9b2\ua9cf\ua9e0-\ua9e4\ua9e6-\ua9ef\ua9fa-\ua9fe\uaa00-\uaa28\uaa40-\uaa42\uaa44-\uaa4b\uaa60-\uaa76\uaa7a\uaa7e-\uaaaf\uaab1\uaab5\uaab6\uaab9-\uaabd\uaac0\uaac2\uaadb-\uaadd\uaae0-\uaaea\uaaf2-\uaaf4\uab01-\uab06\uab09-\uab0e\uab11-\uab16\uab20-\uab26\uab28-\uab2e\uab30-\uab5a\uab5c-\uab65\uab70-\uabe2\uac00-\ud7a3\ud7b0-\ud7c6\ud7cb-\ud7fb\uf900-\ufa6d\ufa70-\ufad9\ufb00-\ufb06\ufb13-\ufb17\ufb1d\ufb1f-\ufb28\ufb2a-\ufb36\ufb38-\ufb3c\ufb3e\ufb40\ufb41\ufb43\ufb44\ufb46-\ufbb1\ufbd3-\ufd3d\ufd50-\ufd8f\ufd92-\ufdc7\ufdf0-\ufdfb\ufe70-\ufe74\ufe76-\ufefc\uff21-\uff3a\uff41-\uff5a\uff66-\uffbe\uffc2-\uffc7\uffca-\uffcf\uffd2-\uffd7\uffda-\uffdc"
-var nonASCIIidentifierChars = "\u200c\u200d\xb7\u0300-\u036f\u0387\u0483-\u0487\u0591-\u05bd\u05bf\u05c1\u05c2\u05c4\u05c5\u05c7\u0610-\u061a\u064b-\u0669\u0670\u06d6-\u06dc\u06df-\u06e4\u06e7\u06e8\u06ea-\u06ed\u06f0-\u06f9\u0711\u0730-\u074a\u07a6-\u07b0\u07c0-\u07c9\u07eb-\u07f3\u0816-\u0819\u081b-\u0823\u0825-\u0827\u0829-\u082d\u0859-\u085b\u08d4-\u08e1\u08e3-\u0903\u093a-\u093c\u093e-\u094f\u0951-\u0957\u0962\u0963\u0966-\u096f\u0981-\u0983\u09bc\u09be-\u09c4\u09c7\u09c8\u09cb-\u09cd\u09d7\u09e2\u09e3\u09e6-\u09ef\u0a01-\u0a03\u0a3c\u0a3e-\u0a42\u0a47\u0a48\u0a4b-\u0a4d\u0a51\u0a66-\u0a71\u0a75\u0a81-\u0a83\u0abc\u0abe-\u0ac5\u0ac7-\u0ac9\u0acb-\u0acd\u0ae2\u0ae3\u0ae6-\u0aef\u0b01-\u0b03\u0b3c\u0b3e-\u0b44\u0b47\u0b48\u0b4b-\u0b4d\u0b56\u0b57\u0b62\u0b63\u0b66-\u0b6f\u0b82\u0bbe-\u0bc2\u0bc6-\u0bc8\u0bca-\u0bcd\u0bd7\u0be6-\u0bef\u0c00-\u0c03\u0c3e-\u0c44\u0c46-\u0c48\u0c4a-\u0c4d\u0c55\u0c56\u0c62\u0c63\u0c66-\u0c6f\u0c81-\u0c83\u0cbc\u0cbe-\u0cc4\u0cc6-\u0cc8\u0cca-\u0ccd\u0cd5\u0cd6\u0ce2\u0ce3\u0ce6-\u0cef\u0d01-\u0d03\u0d3e-\u0d44\u0d46-\u0d48\u0d4a-\u0d4d\u0d57\u0d62\u0d63\u0d66-\u0d6f\u0d82\u0d83\u0dca\u0dcf-\u0dd4\u0dd6\u0dd8-\u0ddf\u0de6-\u0def\u0df2\u0df3\u0e31\u0e34-\u0e3a\u0e47-\u0e4e\u0e50-\u0e59\u0eb1\u0eb4-\u0eb9\u0ebb\u0ebc\u0ec8-\u0ecd\u0ed0-\u0ed9\u0f18\u0f19\u0f20-\u0f29\u0f35\u0f37\u0f39\u0f3e\u0f3f\u0f71-\u0f84\u0f86\u0f87\u0f8d-\u0f97\u0f99-\u0fbc\u0fc6\u102b-\u103e\u1040-\u1049\u1056-\u1059\u105e-\u1060\u1062-\u1064\u1067-\u106d\u1071-\u1074\u1082-\u108d\u108f-\u109d\u135d-\u135f\u1369-\u1371\u1712-\u1714\u1732-\u1734\u1752\u1753\u1772\u1773\u17b4-\u17d3\u17dd\u17e0-\u17e9\u180b-\u180d\u1810-\u1819\u18a9\u1920-\u192b\u1930-\u193b\u1946-\u194f\u19d0-\u19da\u1a17-\u1a1b\u1a55-\u1a5e\u1a60-\u1a7c\u1a7f-\u1a89\u1a90-\u1a99\u1ab0-\u1abd\u1b00-\u1b04\u1b34-\u1b44\u1b50-\u1b59\u1b6b-\u1b73\u1b80-\u1b82\u1ba1-\u1bad\u1bb0-\u1bb9\u1be6-\u1bf3\u1c24-\u1c37\u1c40-\u1c49\u1c50-\u1c59\u1cd0-\u1cd2\u1cd4-\u1ce8\u1ced\u1cf2-\u1cf4\u1cf8\u1cf9\u1dc0-\u1df5\u1dfb-\u1dff\u203f\u2040\u2054\u20d0-\u20dc\u20e1\u20e5-\u20f0\u2cef-\u2cf1\u2d7f\u2de0-\u2dff\u302a-\u302f\u3099\u309a\ua620-\ua629\ua66f\ua674-\ua67d\ua69e\ua69f\ua6f0\ua6f1\ua802\ua806\ua80b\ua823-\ua827\ua880\ua881\ua8b4-\ua8c5\ua8d0-\ua8d9\ua8e0-\ua8f1\ua900-\ua909\ua926-\ua92d\ua947-\ua953\ua980-\ua983\ua9b3-\ua9c0\ua9d0-\ua9d9\ua9e5\ua9f0-\ua9f9\uaa29-\uaa36\uaa43\uaa4c\uaa4d\uaa50-\uaa59\uaa7b-\uaa7d\uaab0\uaab2-\uaab4\uaab7\uaab8\uaabe\uaabf\uaac1\uaaeb-\uaaef\uaaf5\uaaf6\uabe3-\uabea\uabec\uabed\uabf0-\uabf9\ufb1e\ufe00-\ufe0f\ufe20-\ufe2f\ufe33\ufe34\ufe4d-\ufe4f\uff10-\uff19\uff3f"
+var nonASCIIidentifierStartChars = "\xaa\xb5\xba\xc0-\xd6\xd8-\xf6\xf8-\u02c1\u02c6-\u02d1\u02e0-\u02e4\u02ec\u02ee\u0370-\u0374\u0376\u0377\u037a-\u037d\u037f\u0386\u0388-\u038a\u038c\u038e-\u03a1\u03a3-\u03f5\u03f7-\u0481\u048a-\u052f\u0531-\u0556\u0559\u0561-\u0587\u05d0-\u05ea\u05f0-\u05f2\u0620-\u064a\u066e\u066f\u0671-\u06d3\u06d5\u06e5\u06e6\u06ee\u06ef\u06fa-\u06fc\u06ff\u0710\u0712-\u072f\u074d-\u07a5\u07b1\u07ca-\u07ea\u07f4\u07f5\u07fa\u0800-\u0815\u081a\u0824\u0828\u0840-\u0858\u08a0-\u08b4\u08b6-\u08bd\u0904-\u0939\u093d\u0950\u0958-\u0961\u0971-\u0980\u0985-\u098c\u098f\u0990\u0993-\u09a8\u09aa-\u09b0\u09b2\u09b6-\u09b9\u09bd\u09ce\u09dc\u09dd\u09df-\u09e1\u09f0\u09f1\u0a05-\u0a0a\u0a0f\u0a10\u0a13-\u0a28\u0a2a-\u0a30\u0a32\u0a33\u0a35\u0a36\u0a38\u0a39\u0a59-\u0a5c\u0a5e\u0a72-\u0a74\u0a85-\u0a8d\u0a8f-\u0a91\u0a93-\u0aa8\u0aaa-\u0ab0\u0ab2\u0ab3\u0ab5-\u0ab9\u0abd\u0ad0\u0ae0\u0ae1\u0af9\u0b05-\u0b0c\u0b0f\u0b10\u0b13-\u0b28\u0b2a-\u0b30\u0b32\u0b33\u0b35-\u0b39\u0b3d\u0b5c\u0b5d\u0b5f-\u0b61\u0b71\u0b83\u0b85-\u0b8a\u0b8e-\u0b90\u0b92-\u0b95\u0b99\u0b9a\u0b9c\u0b9e\u0b9f\u0ba3\u0ba4\u0ba8-\u0baa\u0bae-\u0bb9\u0bd0\u0c05-\u0c0c\u0c0e-\u0c10\u0c12-\u0c28\u0c2a-\u0c39\u0c3d\u0c58-\u0c5a\u0c60\u0c61\u0c80\u0c85-\u0c8c\u0c8e-\u0c90\u0c92-\u0ca8\u0caa-\u0cb3\u0cb5-\u0cb9\u0cbd\u0cde\u0ce0\u0ce1\u0cf1\u0cf2\u0d05-\u0d0c\u0d0e-\u0d10\u0d12-\u0d3a\u0d3d\u0d4e\u0d54-\u0d56\u0d5f-\u0d61\u0d7a-\u0d7f\u0d85-\u0d96\u0d9a-\u0db1\u0db3-\u0dbb\u0dbd\u0dc0-\u0dc6\u0e01-\u0e30\u0e32\u0e33\u0e40-\u0e46\u0e81\u0e82\u0e84\u0e87\u0e88\u0e8a\u0e8d\u0e94-\u0e97\u0e99-\u0e9f\u0ea1-\u0ea3\u0ea5\u0ea7\u0eaa\u0eab\u0ead-\u0eb0\u0eb2\u0eb3\u0ebd\u0ec0-\u0ec4\u0ec6\u0edc-\u0edf\u0f00\u0f40-\u0f47\u0f49-\u0f6c\u0f88-\u0f8c\u1000-\u102a\u103f\u1050-\u1055\u105a-\u105d\u1061\u1065\u1066\u106e-\u1070\u1075-\u1081\u108e\u10a0-\u10c5\u10c7\u10cd\u10d0-\u10fa\u10fc-\u1248\u124a-\u124d\u1250-\u1256\u1258\u125a-\u125d\u1260-\u1288\u128a-\u128d\u1290-\u12b0\u12b2-\u12b5\u12b8-\u12be\u12c0\u12c2-\u12c5\u12c8-\u12d6\u12d8-\u1310\u1312-\u1315\u1318-\u135a\u1380-\u138f\u13a0-\u13f5\u13f8-\u13fd\u1401-\u166c\u166f-\u167f\u1681-\u169a\u16a0-\u16ea\u16ee-\u16f8\u1700-\u170c\u170e-\u1711\u1720-\u1731\u1740-\u1751\u1760-\u176c\u176e-\u1770\u1780-\u17b3\u17d7\u17dc\u1820-\u1877\u1880-\u18a8\u18aa\u18b0-\u18f5\u1900-\u191e\u1950-\u196d\u1970-\u1974\u1980-\u19ab\u19b0-\u19c9\u1a00-\u1a16\u1a20-\u1a54\u1aa7\u1b05-\u1b33\u1b45-\u1b4b\u1b83-\u1ba0\u1bae\u1baf\u1bba-\u1be5\u1c00-\u1c23\u1c4d-\u1c4f\u1c5a-\u1c7d\u1c80-\u1c88\u1ce9-\u1cec\u1cee-\u1cf1\u1cf5\u1cf6\u1d00-\u1dbf\u1e00-\u1f15\u1f18-\u1f1d\u1f20-\u1f45\u1f48-\u1f4d\u1f50-\u1f57\u1f59\u1f5b\u1f5d\u1f5f-\u1f7d\u1f80-\u1fb4\u1fb6-\u1fbc\u1fbe\u1fc2-\u1fc4\u1fc6-\u1fcc\u1fd0-\u1fd3\u1fd6-\u1fdb\u1fe0-\u1fec\u1ff2-\u1ff4\u1ff6-\u1ffc\u2071\u207f\u2090-\u209c\u2102\u2107\u210a-\u2113\u2115\u2118-\u211d\u2124\u2126\u2128\u212a-\u2139\u213c-\u213f\u2145-\u2149\u214e\u2160-\u2188\u2c00-\u2c2e\u2c30-\u2c5e\u2c60-\u2ce4\u2ceb-\u2cee\u2cf2\u2cf3\u2d00-\u2d25\u2d27\u2d2d\u2d30-\u2d67\u2d6f\u2d80-\u2d96\u2da0-\u2da6\u2da8-\u2dae\u2db0-\u2db6\u2db8-\u2dbe\u2dc0-\u2dc6\u2dc8-\u2dce\u2dd0-\u2dd6\u2dd8-\u2dde\u3005-\u3007\u3021-\u3029\u3031-\u3035\u3038-\u303c\u3041-\u3096\u309b-\u309f\u30a1-\u30fa\u30fc-\u30ff\u3105-\u312d\u3131-\u318e\u31a0-\u31ba\u31f0-\u31ff\u3400-\u4db5\u4e00-\u9fd5\ua000-\ua48c\ua4d0-\ua4fd\ua500-\ua60c\ua610-\ua61f\ua62a\ua62b\ua640-\ua66e\ua67f-\ua69d\ua6a0-\ua6ef\ua717-\ua71f\ua722-\ua788\ua78b-\ua7ae\ua7b0-\ua7b7\ua7f7-\ua801\ua803-\ua805\ua807-\ua80a\ua80c-\ua822\ua840-\ua873\ua882-\ua8b3\ua8f2-\ua8f7\ua8fb\ua8fd\ua90a-\ua925\ua930-\ua946\ua960-\ua97c\ua984-\ua9b2\ua9cf\ua9e0-\ua9e4\ua9e6-\ua9ef\ua9fa-\ua9fe\uaa00-\uaa28\uaa40-\uaa42\uaa44-\uaa4b\uaa60-\uaa76\uaa7a\uaa7e-\uaaaf\uaab1\uaab5\uaab6\uaab9-\uaabd\uaac0\uaac2\uaadb-\uaadd\uaae0-\uaaea\uaaf2-\uaaf4\uab01-\uab06\uab09-\uab0e\uab11-\uab16\uab20-\uab26\uab28-\uab2e\uab30-\uab5a\uab5c-\uab65\uab70-\uabe2\uac00-\ud7a3\ud7b0-\ud7c6\ud7cb-\ud7fb\uf900-\ufa6d\ufa70-\ufad9\ufb00-\ufb06\ufb13-\ufb17\ufb1d\ufb1f-\ufb28\ufb2a-\ufb36\ufb38-\ufb3c\ufb3e\ufb40\ufb41\ufb43\ufb44\ufb46-\ufbb1\ufbd3-\ufd3d\ufd50-\ufd8f\ufd92-\ufdc7\ufdf0-\ufdfb\ufe70-\ufe74\ufe76-\ufefc\uff21-\uff3a\uff41-\uff5a\uff66-\uffbe\uffc2-\uffc7\uffca-\uffcf\uffd2-\uffd7\uffda-\uffdc";
+var nonASCIIidentifierChars = "\u200c\u200d\xb7\u0300-\u036f\u0387\u0483-\u0487\u0591-\u05bd\u05bf\u05c1\u05c2\u05c4\u05c5\u05c7\u0610-\u061a\u064b-\u0669\u0670\u06d6-\u06dc\u06df-\u06e4\u06e7\u06e8\u06ea-\u06ed\u06f0-\u06f9\u0711\u0730-\u074a\u07a6-\u07b0\u07c0-\u07c9\u07eb-\u07f3\u0816-\u0819\u081b-\u0823\u0825-\u0827\u0829-\u082d\u0859-\u085b\u08d4-\u08e1\u08e3-\u0903\u093a-\u093c\u093e-\u094f\u0951-\u0957\u0962\u0963\u0966-\u096f\u0981-\u0983\u09bc\u09be-\u09c4\u09c7\u09c8\u09cb-\u09cd\u09d7\u09e2\u09e3\u09e6-\u09ef\u0a01-\u0a03\u0a3c\u0a3e-\u0a42\u0a47\u0a48\u0a4b-\u0a4d\u0a51\u0a66-\u0a71\u0a75\u0a81-\u0a83\u0abc\u0abe-\u0ac5\u0ac7-\u0ac9\u0acb-\u0acd\u0ae2\u0ae3\u0ae6-\u0aef\u0b01-\u0b03\u0b3c\u0b3e-\u0b44\u0b47\u0b48\u0b4b-\u0b4d\u0b56\u0b57\u0b62\u0b63\u0b66-\u0b6f\u0b82\u0bbe-\u0bc2\u0bc6-\u0bc8\u0bca-\u0bcd\u0bd7\u0be6-\u0bef\u0c00-\u0c03\u0c3e-\u0c44\u0c46-\u0c48\u0c4a-\u0c4d\u0c55\u0c56\u0c62\u0c63\u0c66-\u0c6f\u0c81-\u0c83\u0cbc\u0cbe-\u0cc4\u0cc6-\u0cc8\u0cca-\u0ccd\u0cd5\u0cd6\u0ce2\u0ce3\u0ce6-\u0cef\u0d01-\u0d03\u0d3e-\u0d44\u0d46-\u0d48\u0d4a-\u0d4d\u0d57\u0d62\u0d63\u0d66-\u0d6f\u0d82\u0d83\u0dca\u0dcf-\u0dd4\u0dd6\u0dd8-\u0ddf\u0de6-\u0def\u0df2\u0df3\u0e31\u0e34-\u0e3a\u0e47-\u0e4e\u0e50-\u0e59\u0eb1\u0eb4-\u0eb9\u0ebb\u0ebc\u0ec8-\u0ecd\u0ed0-\u0ed9\u0f18\u0f19\u0f20-\u0f29\u0f35\u0f37\u0f39\u0f3e\u0f3f\u0f71-\u0f84\u0f86\u0f87\u0f8d-\u0f97\u0f99-\u0fbc\u0fc6\u102b-\u103e\u1040-\u1049\u1056-\u1059\u105e-\u1060\u1062-\u1064\u1067-\u106d\u1071-\u1074\u1082-\u108d\u108f-\u109d\u135d-\u135f\u1369-\u1371\u1712-\u1714\u1732-\u1734\u1752\u1753\u1772\u1773\u17b4-\u17d3\u17dd\u17e0-\u17e9\u180b-\u180d\u1810-\u1819\u18a9\u1920-\u192b\u1930-\u193b\u1946-\u194f\u19d0-\u19da\u1a17-\u1a1b\u1a55-\u1a5e\u1a60-\u1a7c\u1a7f-\u1a89\u1a90-\u1a99\u1ab0-\u1abd\u1b00-\u1b04\u1b34-\u1b44\u1b50-\u1b59\u1b6b-\u1b73\u1b80-\u1b82\u1ba1-\u1bad\u1bb0-\u1bb9\u1be6-\u1bf3\u1c24-\u1c37\u1c40-\u1c49\u1c50-\u1c59\u1cd0-\u1cd2\u1cd4-\u1ce8\u1ced\u1cf2-\u1cf4\u1cf8\u1cf9\u1dc0-\u1df5\u1dfb-\u1dff\u203f\u2040\u2054\u20d0-\u20dc\u20e1\u20e5-\u20f0\u2cef-\u2cf1\u2d7f\u2de0-\u2dff\u302a-\u302f\u3099\u309a\ua620-\ua629\ua66f\ua674-\ua67d\ua69e\ua69f\ua6f0\ua6f1\ua802\ua806\ua80b\ua823-\ua827\ua880\ua881\ua8b4-\ua8c5\ua8d0-\ua8d9\ua8e0-\ua8f1\ua900-\ua909\ua926-\ua92d\ua947-\ua953\ua980-\ua983\ua9b3-\ua9c0\ua9d0-\ua9d9\ua9e5\ua9f0-\ua9f9\uaa29-\uaa36\uaa43\uaa4c\uaa4d\uaa50-\uaa59\uaa7b-\uaa7d\uaab0\uaab2-\uaab4\uaab7\uaab8\uaabe\uaabf\uaac1\uaaeb-\uaaef\uaaf5\uaaf6\uabe3-\uabea\uabec\uabed\uabf0-\uabf9\ufb1e\ufe00-\ufe0f\ufe20-\ufe2f\ufe33\ufe34\ufe4d-\ufe4f\uff10-\uff19\uff3f";
 
-var nonASCIIidentifierStart = new RegExp("[" + nonASCIIidentifierStartChars + "]")
-var nonASCIIidentifier = new RegExp("[" + nonASCIIidentifierStartChars + nonASCIIidentifierChars + "]")
+var nonASCIIidentifierStart = new RegExp("[" + nonASCIIidentifierStartChars + "]");
+var nonASCIIidentifier = new RegExp("[" + nonASCIIidentifierStartChars + nonASCIIidentifierChars + "]");
 
-nonASCIIidentifierStartChars = nonASCIIidentifierChars = null
+nonASCIIidentifierStartChars = nonASCIIidentifierChars = null;
 
 // These are a run-length and offset encoded representation of the
 // >0xffff code points that are a valid part of identifiers. The
@@ -40,47 +40,47 @@ nonASCIIidentifierStartChars = nonASCIIidentifierChars = null
 // generated by bin/generate-identifier-regex.js
 
 // eslint-disable-next-line comma-spacing
-var astralIdentifierStartCodes = [0,11,2,25,2,18,2,1,2,14,3,13,35,122,70,52,268,28,4,48,48,31,17,26,6,37,11,29,3,35,5,7,2,4,43,157,19,35,5,35,5,39,9,51,157,310,10,21,11,7,153,5,3,0,2,43,2,1,4,0,3,22,11,22,10,30,66,18,2,1,11,21,11,25,71,55,7,1,65,0,16,3,2,2,2,26,45,28,4,28,36,7,2,27,28,53,11,21,11,18,14,17,111,72,56,50,14,50,785,52,76,44,33,24,27,35,42,34,4,0,13,47,15,3,22,0,2,0,36,17,2,24,85,6,2,0,2,3,2,14,2,9,8,46,39,7,3,1,3,21,2,6,2,1,2,4,4,0,19,0,13,4,159,52,19,3,54,47,21,1,2,0,185,46,42,3,37,47,21,0,60,42,86,25,391,63,32,0,449,56,264,8,2,36,18,0,50,29,881,921,103,110,18,195,2749,1070,4050,582,8634,568,8,30,114,29,19,47,17,3,32,20,6,18,881,68,12,0,67,12,65,0,32,6124,20,754,9486,1,3071,106,6,12,4,8,8,9,5991,84,2,70,2,1,3,0,3,1,3,3,2,11,2,0,2,6,2,64,2,3,3,7,2,6,2,27,2,3,2,4,2,0,4,6,2,339,3,24,2,24,2,30,2,24,2,30,2,24,2,30,2,24,2,30,2,24,2,7,4149,196,60,67,1213,3,2,26,2,1,2,0,3,0,2,9,2,3,2,0,2,0,7,0,5,0,2,0,2,0,2,2,2,1,2,0,3,0,2,0,2,0,2,0,2,0,2,1,2,0,3,3,2,6,2,3,2,3,2,0,2,9,2,16,6,2,2,4,2,16,4421,42710,42,4148,12,221,3,5761,10591,541]
+var astralIdentifierStartCodes = [0,11,2,25,2,18,2,1,2,14,3,13,35,122,70,52,268,28,4,48,48,31,17,26,6,37,11,29,3,35,5,7,2,4,43,157,19,35,5,35,5,39,9,51,157,310,10,21,11,7,153,5,3,0,2,43,2,1,4,0,3,22,11,22,10,30,66,18,2,1,11,21,11,25,71,55,7,1,65,0,16,3,2,2,2,26,45,28,4,28,36,7,2,27,28,53,11,21,11,18,14,17,111,72,56,50,14,50,785,52,76,44,33,24,27,35,42,34,4,0,13,47,15,3,22,0,2,0,36,17,2,24,85,6,2,0,2,3,2,14,2,9,8,46,39,7,3,1,3,21,2,6,2,1,2,4,4,0,19,0,13,4,159,52,19,3,54,47,21,1,2,0,185,46,42,3,37,47,21,0,60,42,86,25,391,63,32,0,449,56,264,8,2,36,18,0,50,29,881,921,103,110,18,195,2749,1070,4050,582,8634,568,8,30,114,29,19,47,17,3,32,20,6,18,881,68,12,0,67,12,65,0,32,6124,20,754,9486,1,3071,106,6,12,4,8,8,9,5991,84,2,70,2,1,3,0,3,1,3,3,2,11,2,0,2,6,2,64,2,3,3,7,2,6,2,27,2,3,2,4,2,0,4,6,2,339,3,24,2,24,2,30,2,24,2,30,2,24,2,30,2,24,2,30,2,24,2,7,4149,196,60,67,1213,3,2,26,2,1,2,0,3,0,2,9,2,3,2,0,2,0,7,0,5,0,2,0,2,0,2,2,2,1,2,0,3,0,2,0,2,0,2,0,2,0,2,1,2,0,3,3,2,6,2,3,2,3,2,0,2,9,2,16,6,2,2,4,2,16,4421,42710,42,4148,12,221,3,5761,10591,541];
 
 // eslint-disable-next-line comma-spacing
-var astralIdentifierCodes = [509,0,227,0,150,4,294,9,1368,2,2,1,6,3,41,2,5,0,166,1,1306,2,54,14,32,9,16,3,46,10,54,9,7,2,37,13,2,9,52,0,13,2,49,13,10,2,4,9,83,11,7,0,161,11,6,9,7,3,57,0,2,6,3,1,3,2,10,0,11,1,3,6,4,4,193,17,10,9,87,19,13,9,214,6,3,8,28,1,83,16,16,9,82,12,9,9,84,14,5,9,423,9,838,7,2,7,17,9,57,21,2,13,19882,9,135,4,60,6,26,9,1016,45,17,3,19723,1,5319,4,4,5,9,7,3,6,31,3,149,2,1418,49,513,54,5,49,9,0,15,0,23,4,2,14,1361,6,2,16,3,6,2,1,2,4,2214,6,110,6,6,9,792487,239]
+var astralIdentifierCodes = [509,0,227,0,150,4,294,9,1368,2,2,1,6,3,41,2,5,0,166,1,1306,2,54,14,32,9,16,3,46,10,54,9,7,2,37,13,2,9,52,0,13,2,49,13,10,2,4,9,83,11,7,0,161,11,6,9,7,3,57,0,2,6,3,1,3,2,10,0,11,1,3,6,4,4,193,17,10,9,87,19,13,9,214,6,3,8,28,1,83,16,16,9,82,12,9,9,84,14,5,9,423,9,838,7,2,7,17,9,57,21,2,13,19882,9,135,4,60,6,26,9,1016,45,17,3,19723,1,5319,4,4,5,9,7,3,6,31,3,149,2,1418,49,513,54,5,49,9,0,15,0,23,4,2,14,1361,6,2,16,3,6,2,1,2,4,2214,6,110,6,6,9,792487,239];
 
 // This has a complexity linear to the value of the code. The
 // assumption is that looking up astral identifier characters is
 // rare.
 function isInAstralSet(code, set) {
-  var pos = 0x10000
+  var pos = 0x10000;
   for (var i = 0; i < set.length; i += 2) {
-    pos += set[i]
-    if (pos > code) return false
-    pos += set[i + 1]
-    if (pos >= code) return true
+    pos += set[i];
+    if (pos > code) { return false }
+    pos += set[i + 1];
+    if (pos >= code) { return true }
   }
 }
 
 // Test whether a given character code starts an identifier.
 
 function isIdentifierStart(code, astral) {
-  if (code < 65) return code === 36
-  if (code < 91) return true
-  if (code < 97) return code === 95
-  if (code < 123) return true
-  if (code <= 0xffff) return code >= 0xaa && nonASCIIidentifierStart.test(String.fromCharCode(code))
-  if (astral === false) return false
+  if (code < 65) { return code === 36 }
+  if (code < 91) { return true }
+  if (code < 97) { return code === 95 }
+  if (code < 123) { return true }
+  if (code <= 0xffff) { return code >= 0xaa && nonASCIIidentifierStart.test(String.fromCharCode(code)) }
+  if (astral === false) { return false }
   return isInAstralSet(code, astralIdentifierStartCodes)
 }
 
 // Test whether a given character is part of an identifier.
 
 function isIdentifierChar(code, astral) {
-  if (code < 48) return code === 36
-  if (code < 58) return true
-  if (code < 65) return false
-  if (code < 91) return true
-  if (code < 97) return code === 95
-  if (code < 123) return true
-  if (code <= 0xffff) return code >= 0xaa && nonASCIIidentifier.test(String.fromCharCode(code))
-  if (astral === false) return false
+  if (code < 48) { return code === 36 }
+  if (code < 58) { return true }
+  if (code < 65) { return false }
+  if (code < 91) { return true }
+  if (code < 97) { return code === 95 }
+  if (code < 123) { return true }
+  if (code <= 0xffff) { return code >= 0xaa && nonASCIIidentifier.test(String.fromCharCode(code)) }
+  if (astral === false) { return false }
   return isInAstralSet(code, astralIdentifierStartCodes) || isInAstralSet(code, astralIdentifierCodes)
 }
 
@@ -110,16 +110,16 @@ function isIdentifierChar(code, astral) {
 var TokenType = function TokenType(label, conf) {
   if ( conf === void 0 ) conf = {};
 
-  this.label = label
-  this.keyword = conf.keyword
-  this.beforeExpr = !!conf.beforeExpr
-  this.startsExpr = !!conf.startsExpr
-  this.isLoop = !!conf.isLoop
-  this.isAssign = !!conf.isAssign
-  this.prefix = !!conf.prefix
-  this.postfix = !!conf.postfix
-  this.binop = conf.binop || null
-  this.updateContext = null
+  this.label = label;
+  this.keyword = conf.keyword;
+  this.beforeExpr = !!conf.beforeExpr;
+  this.startsExpr = !!conf.startsExpr;
+  this.isLoop = !!conf.isLoop;
+  this.isAssign = !!conf.isAssign;
+  this.prefix = !!conf.prefix;
+  this.postfix = !!conf.postfix;
+  this.binop = conf.binop || null;
+  this.updateContext = null;
 };
 
 function binop(name, prec) {
@@ -127,19 +127,20 @@ function binop(name, prec) {
 }
 var beforeExpr = {beforeExpr: true};
 var startsExpr = {startsExpr: true};
+
 // Map keyword names to token types.
 
-var keywordTypes = {}
+var keywords$1 = {};
 
 // Succinct definitions of keyword token types
 function kw(name, options) {
   if ( options === void 0 ) options = {};
 
-  options.keyword = name
-  return keywordTypes[name] = new TokenType(name, options)
+  options.keyword = name;
+  return keywords$1[name] = new TokenType(name, options)
 }
 
-var tt = {
+var types = {
   num: new TokenType("num", startsExpr),
   regexp: new TokenType("regexp", startsExpr),
   string: new TokenType("string", startsExpr),
@@ -160,6 +161,7 @@ var tt = {
   question: new TokenType("?", beforeExpr),
   arrow: new TokenType("=>", beforeExpr),
   template: new TokenType("template"),
+  invalidTemplate: new TokenType("invalidTemplate"),
   ellipsis: new TokenType("...", beforeExpr),
   backQuote: new TokenType("`", startsExpr),
   dollarBraceL: new TokenType("${", {beforeExpr: true, startsExpr: true}),
@@ -220,7 +222,7 @@ var tt = {
   _new: kw("new", {beforeExpr: true, startsExpr: true}),
   _this: kw("this", startsExpr),
   _super: kw("super", startsExpr),
-  _class: kw("class"),
+  _class: kw("class", startsExpr),
   _extends: kw("extends", beforeExpr),
   _export: kw("export"),
   _import: kw("import"),
@@ -232,21 +234,21 @@ var tt = {
   _typeof: kw("typeof", {beforeExpr: true, prefix: true, startsExpr: true}),
   _void: kw("void", {beforeExpr: true, prefix: true, startsExpr: true}),
   _delete: kw("delete", {beforeExpr: true, prefix: true, startsExpr: true})
-}
+};
 
 // Matches a whole line break (where CRLF is considered a single
 // line break). Used to count lines.
 
-var lineBreak = /\r\n?|\n|\u2028|\u2029/
-var lineBreakG = new RegExp(lineBreak.source, "g")
+var lineBreak = /\r\n?|\n|\u2028|\u2029/;
+var lineBreakG = new RegExp(lineBreak.source, "g");
 
 function isNewLine(code) {
   return code === 10 || code === 13 || code === 0x2028 || code === 0x2029
 }
 
-var nonASCIIwhitespace = /[\u1680\u180e\u2000-\u200a\u202f\u205f\u3000\ufeff]/
+var nonASCIIwhitespace = /[\u1680\u180e\u2000-\u200a\u202f\u205f\u3000\ufeff]/;
 
-var skipWhiteSpace = /(?:\s|\/\/.*|\/\*[^]*?\*\/)*/g
+var skipWhiteSpace = /(?:\s|\/\/.*|\/\*[^]*?\*\/)*/g;
 
 var ref = Object.prototype;
 var hasOwnProperty = ref.hasOwnProperty;
@@ -260,14 +262,14 @@ function has(obj, propName) {
 
 var isArray = Array.isArray || (function (obj) { return (
   toString.call(obj) === "[object Array]"
-); })
+); });
 
 // These are used when `options.locations` is on, for the
 // `startLoc` and `endLoc` properties.
 
 var Position = function Position(line, col) {
-  this.line = line
-  this.column = col
+  this.line = line;
+  this.column = col;
 };
 
 Position.prototype.offset = function offset (n) {
@@ -275,9 +277,9 @@ Position.prototype.offset = function offset (n) {
 };
 
 var SourceLocation = function SourceLocation(p, start, end) {
-  this.start = start
-  this.end = end
-  if (p.sourceFile !== null) this.source = p.sourceFile
+  this.start = start;
+  this.end = end;
+  if (p.sourceFile !== null) { this.source = p.sourceFile; }
 };
 
 // The `getLineInfo` function is mostly useful when the
@@ -288,11 +290,11 @@ var SourceLocation = function SourceLocation(p, start, end) {
 
 function getLineInfo(input, offset) {
   for (var line = 1, cur = 0;;) {
-    lineBreakG.lastIndex = cur
-    var match = lineBreakG.exec(input)
+    lineBreakG.lastIndex = cur;
+    var match = lineBreakG.exec(input);
     if (match && match.index < offset) {
-      ++line
-      cur = match.index + match[0].length
+      ++line;
+      cur = match.index + match[0].length;
     } else {
       return new Position(line, offset - cur)
     }
@@ -382,28 +384,28 @@ var defaultOptions = {
   // (non-standard) ParenthesizedExpression nodes
   preserveParens: false,
   plugins: {}
-}
+};
 
 // Interpret and default an options object
 
 function getOptions(opts) {
-  var options = {}
+  var options = {};
 
   for (var opt in defaultOptions)
-    options[opt] = opts && has(opts, opt) ? opts[opt] : defaultOptions[opt]
+    { options[opt] = opts && has(opts, opt) ? opts[opt] : defaultOptions[opt]; }
 
   if (options.ecmaVersion >= 2015)
-    options.ecmaVersion -= 2009
+    { options.ecmaVersion -= 2009; }
 
   if (options.allowReserved == null)
-    options.allowReserved = options.ecmaVersion < 5
+    { options.allowReserved = options.ecmaVersion < 5; }
 
   if (isArray(options.onToken)) {
-    var tokens = options.onToken
-    options.onToken = function (token) { return tokens.push(token); }
+    var tokens = options.onToken;
+    options.onToken = function (token) { return tokens.push(token); };
   }
   if (isArray(options.onComment))
-    options.onComment = pushComment(options, options.onComment)
+    { options.onComment = pushComment(options, options.onComment); }
 
   return options
 }
@@ -415,100 +417,100 @@ function pushComment(options, array) {
       value: text,
       start: start,
       end: end
-    }
+    };
     if (options.locations)
-      comment.loc = new SourceLocation(this, startLoc, endLoc)
+      { comment.loc = new SourceLocation(this, startLoc, endLoc); }
     if (options.ranges)
-      comment.range = [start, end]
-    array.push(comment)
+      { comment.range = [start, end]; }
+    array.push(comment);
   }
 }
 
 // Registered plugins
-var plugins = {}
+var plugins = {};
 
 function keywordRegexp(words) {
-  return new RegExp("^(" + words.replace(/ /g, "|") + ")$")
+  return new RegExp("^(?:" + words.replace(/ /g, "|") + ")$")
 }
 
 var Parser = function Parser(options, input, startPos) {
-  this.options = options = getOptions(options)
-  this.sourceFile = options.sourceFile
-  this.keywords = keywordRegexp(keywords[options.ecmaVersion >= 6 ? 6 : 5])
-  var reserved = ""
+  this.options = options = getOptions(options);
+  this.sourceFile = options.sourceFile;
+  this.keywords = keywordRegexp(keywords[options.ecmaVersion >= 6 ? 6 : 5]);
+  var reserved = "";
   if (!options.allowReserved) {
     for (var v = options.ecmaVersion;; v--)
-      if (reserved = reservedWords[v]) break
-    if (options.sourceType == "module") reserved += " await"
+      { if (reserved = reservedWords[v]) { break } }
+    if (options.sourceType == "module") { reserved += " await"; }
   }
-  this.reservedWords = keywordRegexp(reserved)
-  var reservedStrict = (reserved ? reserved + " " : "") + reservedWords.strict
-  this.reservedWordsStrict = keywordRegexp(reservedStrict)
-  this.reservedWordsStrictBind = keywordRegexp(reservedStrict + " " + reservedWords.strictBind)
-  this.input = String(input)
+  this.reservedWords = keywordRegexp(reserved);
+  var reservedStrict = (reserved ? reserved + " " : "") + reservedWords.strict;
+  this.reservedWordsStrict = keywordRegexp(reservedStrict);
+  this.reservedWordsStrictBind = keywordRegexp(reservedStrict + " " + reservedWords.strictBind);
+  this.input = String(input);
 
   // Used to signal to callers of `readWord1` whether the word
   // contained any escape sequences. This is needed because words with
   // escape sequences must not be interpreted as keywords.
-  this.containsEsc = false
+  this.containsEsc = false;
 
   // Load plugins
-  this.loadPlugins(options.plugins)
+  this.loadPlugins(options.plugins);
 
   // Set up token state
 
   // The current position of the tokenizer in the input.
   if (startPos) {
-    this.pos = startPos
-    this.lineStart = this.input.lastIndexOf("\n", startPos - 1) + 1
-    this.curLine = this.input.slice(0, this.lineStart).split(lineBreak).length
+    this.pos = startPos;
+    this.lineStart = this.input.lastIndexOf("\n", startPos - 1) + 1;
+    this.curLine = this.input.slice(0, this.lineStart).split(lineBreak).length;
   } else {
-    this.pos = this.lineStart = 0
-    this.curLine = 1
+    this.pos = this.lineStart = 0;
+    this.curLine = 1;
   }
 
   // Properties of the current token:
   // Its type
-  this.type = tt.eof
+  this.type = types.eof;
   // For tokens that include more information than their type, the value
-  this.value = null
+  this.value = null;
   // Its start and end offset
-  this.start = this.end = this.pos
+  this.start = this.end = this.pos;
   // And, if locations are used, the {line, column} object
   // corresponding to those offsets
-  this.startLoc = this.endLoc = this.curPosition()
+  this.startLoc = this.endLoc = this.curPosition();
 
   // Position information for the previous token
-  this.lastTokEndLoc = this.lastTokStartLoc = null
-  this.lastTokStart = this.lastTokEnd = this.pos
+  this.lastTokEndLoc = this.lastTokStartLoc = null;
+  this.lastTokStart = this.lastTokEnd = this.pos;
 
   // The context stack is used to superficially track syntactic
   // context to predict whether a regular expression is allowed in a
   // given position.
-  this.context = this.initialContext()
-  this.exprAllowed = true
+  this.context = this.initialContext();
+  this.exprAllowed = true;
 
   // Figure out if it's a module code.
-  this.inModule = options.sourceType === "module"
-  this.strict = this.inModule || this.strictDirective(this.pos)
+  this.inModule = options.sourceType === "module";
+  this.strict = this.inModule || this.strictDirective(this.pos);
 
   // Used to signify the start of a potential arrow function
-  this.potentialArrowAt = -1
+  this.potentialArrowAt = -1;
 
   // Flags to track whether we are in a function, a generator, an async function.
-  this.inFunction = this.inGenerator = this.inAsync = false
+  this.inFunction = this.inGenerator = this.inAsync = false;
   // Positions to delayed-check that yield/await does not exist in default parameters.
-  this.yieldPos = this.awaitPos = 0
+  this.yieldPos = this.awaitPos = 0;
   // Labels in scope.
-  this.labels = []
+  this.labels = [];
 
   // If enabled, skip leading hashbang line.
   if (this.pos === 0 && options.allowHashBang && this.input.slice(0, 2) === "#!")
-    this.skipLineComment(2)
+    { this.skipLineComment(2); }
 
   // Scope tracking for duplicate variable names (see scope.js)
-  this.scopeStack = []
-  this.enterFunctionScope()
+  this.scopeStack = [];
+  this.enterFunctionScope();
 };
 
 // DEPRECATED Kept for backwards compatibility until 3.0 in case a plugin uses them
@@ -516,151 +518,155 @@ Parser.prototype.isKeyword = function isKeyword (word) { return this.keywords.te
 Parser.prototype.isReservedWord = function isReservedWord (word) { return this.reservedWords.test(word) };
 
 Parser.prototype.extend = function extend (name, f) {
-  this[name] = f(this[name])
+  this[name] = f(this[name]);
 };
 
 Parser.prototype.loadPlugins = function loadPlugins (pluginConfigs) {
     var this$1 = this;
 
   for (var name in pluginConfigs) {
-    var plugin = plugins[name]
-    if (!plugin) throw new Error("Plugin '" + name + "' not found")
-    plugin(this$1, pluginConfigs[name])
+    var plugin = plugins[name];
+    if (!plugin) { throw new Error("Plugin '" + name + "' not found") }
+    plugin(this$1, pluginConfigs[name]);
   }
 };
 
 Parser.prototype.parse = function parse () {
-  var node = this.options.program || this.startNode()
-  this.nextToken()
+  var node = this.options.program || this.startNode();
+  this.nextToken();
   return this.parseTopLevel(node)
 };
 
-var pp = Parser.prototype
+var pp = Parser.prototype;
 
 // ## Parser utilities
 
-var literal = /^(?:'((?:[^']|\.)*)'|"((?:[^"]|\.)*)"|;)/
+var literal = /^(?:'((?:[^']|\.)*)'|"((?:[^"]|\.)*)"|;)/;
 pp.strictDirective = function(start) {
   var this$1 = this;
 
   for (;;) {
-    skipWhiteSpace.lastIndex = start
-    start += skipWhiteSpace.exec(this$1.input)[0].length
-    var match = literal.exec(this$1.input.slice(start))
-    if (!match) return false
-    if ((match[1] || match[2]) == "use strict") return true
-    start += match[0].length
+    skipWhiteSpace.lastIndex = start;
+    start += skipWhiteSpace.exec(this$1.input)[0].length;
+    var match = literal.exec(this$1.input.slice(start));
+    if (!match) { return false }
+    if ((match[1] || match[2]) == "use strict") { return true }
+    start += match[0].length;
   }
-}
+};
 
 // Predicate that tests whether the next token is of the given
 // type, and if yes, consumes it as a side effect.
 
 pp.eat = function(type) {
   if (this.type === type) {
-    this.next()
+    this.next();
     return true
   } else {
     return false
   }
-}
+};
 
 // Tests whether parsed token is a contextual keyword.
 
 pp.isContextual = function(name) {
-  return this.type === tt.name && this.value === name
-}
+  return this.type === types.name && this.value === name
+};
 
 // Consumes contextual keyword if possible.
 
 pp.eatContextual = function(name) {
-  return this.value === name && this.eat(tt.name)
-}
+  return this.value === name && this.eat(types.name)
+};
 
 // Asserts that following token is given contextual keyword.
 
 pp.expectContextual = function(name) {
-  if (!this.eatContextual(name)) this.unexpected()
-}
+  if (!this.eatContextual(name)) { this.unexpected(); }
+};
 
 // Test whether a semicolon can be inserted at the current position.
 
 pp.canInsertSemicolon = function() {
-  return this.type === tt.eof ||
-    this.type === tt.braceR ||
+  return this.type === types.eof ||
+    this.type === types.braceR ||
     lineBreak.test(this.input.slice(this.lastTokEnd, this.start))
-}
+};
 
 pp.insertSemicolon = function() {
   if (this.canInsertSemicolon()) {
     if (this.options.onInsertedSemicolon)
-      this.options.onInsertedSemicolon(this.lastTokEnd, this.lastTokEndLoc)
+      { this.options.onInsertedSemicolon(this.lastTokEnd, this.lastTokEndLoc); }
     return true
   }
-}
+};
 
 // Consume a semicolon, or, failing that, see if we are allowed to
 // pretend that there is a semicolon at this position.
 
 pp.semicolon = function() {
-  if (!this.eat(tt.semi) && !this.insertSemicolon()) this.unexpected()
-}
+  if (!this.eat(types.semi) && !this.insertSemicolon()) { this.unexpected(); }
+};
 
 pp.afterTrailingComma = function(tokType, notNext) {
   if (this.type == tokType) {
     if (this.options.onTrailingComma)
-      this.options.onTrailingComma(this.lastTokStart, this.lastTokStartLoc)
+      { this.options.onTrailingComma(this.lastTokStart, this.lastTokStartLoc); }
     if (!notNext)
-      this.next()
+      { this.next(); }
     return true
   }
-}
+};
 
 // Expect a token of a given type. If found, consume it, otherwise,
 // raise an unexpected token error.
 
 pp.expect = function(type) {
-  this.eat(type) || this.unexpected()
-}
+  this.eat(type) || this.unexpected();
+};
 
 // Raise an unexpected token error.
 
 pp.unexpected = function(pos) {
-  this.raise(pos != null ? pos : this.start, "Unexpected token")
-}
-
-var DestructuringErrors = function DestructuringErrors() {
-  this.shorthandAssign = this.trailingComma = this.parenthesizedAssign = this.parenthesizedBind = -1
+  this.raise(pos != null ? pos : this.start, "Unexpected token");
 };
 
+function DestructuringErrors() {
+  this.shorthandAssign =
+  this.trailingComma =
+  this.parenthesizedAssign =
+  this.parenthesizedBind =
+    -1;
+}
+
 pp.checkPatternErrors = function(refDestructuringErrors, isAssign) {
-  if (!refDestructuringErrors) return
+  if (!refDestructuringErrors) { return }
   if (refDestructuringErrors.trailingComma > -1)
-    this.raiseRecoverable(refDestructuringErrors.trailingComma, "Comma is not permitted after the rest element")
-  var parens = isAssign ? refDestructuringErrors.parenthesizedAssign : refDestructuringErrors.parenthesizedBind
-  if (parens > -1) this.raiseRecoverable(parens, "Parenthesized pattern")
-}
+    { this.raiseRecoverable(refDestructuringErrors.trailingComma, "Comma is not permitted after the rest element"); }
+  var parens = isAssign ? refDestructuringErrors.parenthesizedAssign : refDestructuringErrors.parenthesizedBind;
+  if (parens > -1) { this.raiseRecoverable(parens, "Parenthesized pattern"); }
+};
 
 pp.checkExpressionErrors = function(refDestructuringErrors, andThrow) {
-  var pos = refDestructuringErrors ? refDestructuringErrors.shorthandAssign : -1
-  if (!andThrow) return pos >= 0
-  if (pos > -1) this.raise(pos, "Shorthand property assignments are valid only in destructuring patterns")
-}
+  var pos = refDestructuringErrors ? refDestructuringErrors.shorthandAssign : -1;
+  if (!andThrow) { return pos >= 0 }
+  if (pos > -1) { this.raise(pos, "Shorthand property assignments are valid only in destructuring patterns"); }
+};
 
 pp.checkYieldAwaitInDefaultParams = function() {
   if (this.yieldPos && (!this.awaitPos || this.yieldPos < this.awaitPos))
-    this.raise(this.yieldPos, "Yield expression cannot be a default value")
+    { this.raise(this.yieldPos, "Yield expression cannot be a default value"); }
   if (this.awaitPos)
-    this.raise(this.awaitPos, "Await expression cannot be a default value")
-}
+    { this.raise(this.awaitPos, "Await expression cannot be a default value"); }
+};
 
 pp.isSimpleAssignTarget = function(expr) {
   if (expr.type === "ParenthesizedExpression")
-    return this.isSimpleAssignTarget(expr.expression)
+    { return this.isSimpleAssignTarget(expr.expression) }
   return expr.type === "Identifier" || expr.type === "MemberExpression"
-}
+};
 
-var pp$1 = Parser.prototype
+var pp$1 = Parser.prototype;
 
 // ### Statement parsing
 
@@ -672,50 +678,51 @@ var pp$1 = Parser.prototype
 pp$1.parseTopLevel = function(node) {
   var this$1 = this;
 
-  var exports = {}
-  if (!node.body) node.body = []
-  while (this.type !== tt.eof) {
-    var stmt = this$1.parseStatement(true, true, exports)
-    node.body.push(stmt)
+  var exports = {};
+  if (!node.body) { node.body = []; }
+  while (this.type !== types.eof) {
+    var stmt = this$1.parseStatement(true, true, exports);
+    node.body.push(stmt);
   }
-  this.next()
+  this.next();
   if (this.options.ecmaVersion >= 6) {
-    node.sourceType = this.options.sourceType
+    node.sourceType = this.options.sourceType;
   }
   return this.finishNode(node, "Program")
-}
+};
 
 var loopLabel = {kind: "loop"};
 var switchLabel = {kind: "switch"};
+
 pp$1.isLet = function() {
-  if (this.type !== tt.name || this.options.ecmaVersion < 6 || this.value != "let") return false
-  skipWhiteSpace.lastIndex = this.pos
-  var skip = skipWhiteSpace.exec(this.input)
-  var next = this.pos + skip[0].length, nextCh = this.input.charCodeAt(next)
-  if (nextCh === 91 || nextCh == 123) return true // '{' and '['
+  if (this.type !== types.name || this.options.ecmaVersion < 6 || this.value != "let") { return false }
+  skipWhiteSpace.lastIndex = this.pos;
+  var skip = skipWhiteSpace.exec(this.input);
+  var next = this.pos + skip[0].length, nextCh = this.input.charCodeAt(next);
+  if (nextCh === 91 || nextCh == 123) { return true } // '{' and '['
   if (isIdentifierStart(nextCh, true)) {
-    var pos = next + 1
-    while (isIdentifierChar(this.input.charCodeAt(pos), true)) ++pos
-    var ident = this.input.slice(next, pos)
-    if (!this.isKeyword(ident)) return true
+    var pos = next + 1;
+    while (isIdentifierChar(this.input.charCodeAt(pos), true)) { ++pos; }
+    var ident = this.input.slice(next, pos);
+    if (!this.isKeyword(ident)) { return true }
   }
   return false
-}
+};
 
 // check 'async [no LineTerminator here] function'
 // - 'async /*foo*/ function' is OK.
 // - 'async /*\n*/ function' is invalid.
 pp$1.isAsyncFunction = function() {
-  if (this.type !== tt.name || this.options.ecmaVersion < 8 || this.value != "async")
-    return false
+  if (this.type !== types.name || this.options.ecmaVersion < 8 || this.value != "async")
+    { return false }
 
-  skipWhiteSpace.lastIndex = this.pos
-  var skip = skipWhiteSpace.exec(this.input)
-  var next = this.pos + skip[0].length
+  skipWhiteSpace.lastIndex = this.pos;
+  var skip = skipWhiteSpace.exec(this.input);
+  var next = this.pos + skip[0].length;
   return !lineBreak.test(this.input.slice(this.pos, next)) &&
     this.input.slice(next, next + 8) === "function" &&
     (next + 8 == this.input.length || !isIdentifierChar(this.input.charAt(next + 8)))
-}
+};
 
 // Parse a single statement.
 //
@@ -725,11 +732,11 @@ pp$1.isAsyncFunction = function() {
 // does not help.
 
 pp$1.parseStatement = function(declaration, topLevel, exports) {
-  var starttype = this.type, node = this.startNode(), kind
+  var starttype = this.type, node = this.startNode(), kind;
 
   if (this.isLet()) {
-    starttype = tt._var
-    kind = "let"
+    starttype = types._var;
+    kind = "let";
   }
 
   // Most types of statements are recognized by the keyword they
@@ -737,38 +744,38 @@ pp$1.parseStatement = function(declaration, topLevel, exports) {
   // complexity.
 
   switch (starttype) {
-  case tt._break: case tt._continue: return this.parseBreakContinueStatement(node, starttype.keyword)
-  case tt._debugger: return this.parseDebuggerStatement(node)
-  case tt._do: return this.parseDoStatement(node)
-  case tt._for: return this.parseForStatement(node)
-  case tt._function:
-    if (!declaration && this.options.ecmaVersion >= 6) this.unexpected()
+  case types._break: case types._continue: return this.parseBreakContinueStatement(node, starttype.keyword)
+  case types._debugger: return this.parseDebuggerStatement(node)
+  case types._do: return this.parseDoStatement(node)
+  case types._for: return this.parseForStatement(node)
+  case types._function:
+    if (!declaration && this.options.ecmaVersion >= 6) { this.unexpected(); }
     return this.parseFunctionStatement(node, false)
-  case tt._class:
-    if (!declaration) this.unexpected()
+  case types._class:
+    if (!declaration) { this.unexpected(); }
     return this.parseClass(node, true)
-  case tt._if: return this.parseIfStatement(node)
-  case tt._return: return this.parseReturnStatement(node)
-  case tt._switch: return this.parseSwitchStatement(node)
-  case tt._throw: return this.parseThrowStatement(node)
-  case tt._try: return this.parseTryStatement(node)
-  case tt._const: case tt._var:
-    kind = kind || this.value
-    if (!declaration && kind != "var") this.unexpected()
+  case types._if: return this.parseIfStatement(node)
+  case types._return: return this.parseReturnStatement(node)
+  case types._switch: return this.parseSwitchStatement(node)
+  case types._throw: return this.parseThrowStatement(node)
+  case types._try: return this.parseTryStatement(node)
+  case types._const: case types._var:
+    kind = kind || this.value;
+    if (!declaration && kind != "var") { this.unexpected(); }
     return this.parseVarStatement(node, kind)
-  case tt._while: return this.parseWhileStatement(node)
-  case tt._with: return this.parseWithStatement(node)
-  case tt.braceL: return this.parseBlock()
-  case tt.semi: return this.parseEmptyStatement(node)
-  case tt._export:
-  case tt._import:
+  case types._while: return this.parseWhileStatement(node)
+  case types._with: return this.parseWithStatement(node)
+  case types.braceL: return this.parseBlock()
+  case types.semi: return this.parseEmptyStatement(node)
+  case types._export:
+  case types._import:
     if (!this.options.allowImportExportEverywhere) {
       if (!topLevel)
-        this.raise(this.start, "'import' and 'export' may only appear at the top level")
+        { this.raise(this.start, "'import' and 'export' may only appear at the top level"); }
       if (!this.inModule)
-        this.raise(this.start, "'import' and 'export' may appear only with 'sourceType: module'")
+        { this.raise(this.start, "'import' and 'export' may appear only with 'sourceType: module'"); }
     }
-    return starttype === tt._import ? this.parseImport(node) : this.parseExport(node, exports)
+    return starttype === types._import ? this.parseImport(node) : this.parseExport(node, exports)
 
     // If the statement does not start with a statement keyword or a
     // brace, it's an ExpressionStatement or LabeledStatement. We
@@ -777,62 +784,62 @@ pp$1.parseStatement = function(declaration, topLevel, exports) {
     // Identifier node, we switch to interpreting it as a label.
   default:
     if (this.isAsyncFunction() && declaration) {
-      this.next()
+      this.next();
       return this.parseFunctionStatement(node, true)
     }
 
-    var maybeName = this.value, expr = this.parseExpression()
-    if (starttype === tt.name && expr.type === "Identifier" && this.eat(tt.colon))
-      return this.parseLabeledStatement(node, maybeName, expr)
-    else return this.parseExpressionStatement(node, expr)
+    var maybeName = this.value, expr = this.parseExpression();
+    if (starttype === types.name && expr.type === "Identifier" && this.eat(types.colon))
+      { return this.parseLabeledStatement(node, maybeName, expr) }
+    else { return this.parseExpressionStatement(node, expr) }
   }
-}
+};
 
 pp$1.parseBreakContinueStatement = function(node, keyword) {
   var this$1 = this;
 
-  var isBreak = keyword == "break"
-  this.next()
-  if (this.eat(tt.semi) || this.insertSemicolon()) node.label = null
-  else if (this.type !== tt.name) this.unexpected()
+  var isBreak = keyword == "break";
+  this.next();
+  if (this.eat(types.semi) || this.insertSemicolon()) { node.label = null; }
+  else if (this.type !== types.name) { this.unexpected(); }
   else {
-    node.label = this.parseIdent()
-    this.semicolon()
+    node.label = this.parseIdent();
+    this.semicolon();
   }
 
   // Verify that there is an actual destination to break or
   // continue to.
-  var i = 0
+  var i = 0;
   for (; i < this.labels.length; ++i) {
-    var lab = this$1.labels[i]
+    var lab = this$1.labels[i];
     if (node.label == null || lab.name === node.label.name) {
-      if (lab.kind != null && (isBreak || lab.kind === "loop")) break
-      if (node.label && isBreak) break
+      if (lab.kind != null && (isBreak || lab.kind === "loop")) { break }
+      if (node.label && isBreak) { break }
     }
   }
-  if (i === this.labels.length) this.raise(node.start, "Unsyntactic " + keyword)
+  if (i === this.labels.length) { this.raise(node.start, "Unsyntactic " + keyword); }
   return this.finishNode(node, isBreak ? "BreakStatement" : "ContinueStatement")
-}
+};
 
 pp$1.parseDebuggerStatement = function(node) {
-  this.next()
-  this.semicolon()
+  this.next();
+  this.semicolon();
   return this.finishNode(node, "DebuggerStatement")
-}
+};
 
 pp$1.parseDoStatement = function(node) {
-  this.next()
-  this.labels.push(loopLabel)
-  node.body = this.parseStatement(false)
-  this.labels.pop()
-  this.expect(tt._while)
-  node.test = this.parseParenExpression()
+  this.next();
+  this.labels.push(loopLabel);
+  node.body = this.parseStatement(false);
+  this.labels.pop();
+  this.expect(types._while);
+  node.test = this.parseParenExpression();
   if (this.options.ecmaVersion >= 6)
-    this.eat(tt.semi)
+    { this.eat(types.semi); }
   else
-    this.semicolon()
+    { this.semicolon(); }
   return this.finishNode(node, "DoWhileStatement")
-}
+};
 
 // Disambiguating between a `for` and a `for`/`in` or `for`/`of`
 // loop is non-trivial. Basically, we have to parse the init `var`
@@ -843,202 +850,207 @@ pp$1.parseDoStatement = function(node) {
 // is a regular `for` loop.
 
 pp$1.parseForStatement = function(node) {
-  this.next()
-  this.labels.push(loopLabel)
-  this.enterLexicalScope()
-  this.expect(tt.parenL)
-  if (this.type === tt.semi) return this.parseFor(node, null)
-  var isLet = this.isLet()
-  if (this.type === tt._var || this.type === tt._const || isLet) {
-    var init$1 = this.startNode(), kind = isLet ? "let" : this.value
-    this.next()
-    this.parseVar(init$1, true, kind)
-    this.finishNode(init$1, "VariableDeclaration")
-    if ((this.type === tt._in || (this.options.ecmaVersion >= 6 && this.isContextual("of"))) && init$1.declarations.length === 1 &&
+  this.next();
+  this.labels.push(loopLabel);
+  this.enterLexicalScope();
+  this.expect(types.parenL);
+  if (this.type === types.semi) { return this.parseFor(node, null) }
+  var isLet = this.isLet();
+  if (this.type === types._var || this.type === types._const || isLet) {
+    var init$1 = this.startNode(), kind = isLet ? "let" : this.value;
+    this.next();
+    this.parseVar(init$1, true, kind);
+    this.finishNode(init$1, "VariableDeclaration");
+    if ((this.type === types._in || (this.options.ecmaVersion >= 6 && this.isContextual("of"))) && init$1.declarations.length === 1 &&
         !(kind !== "var" && init$1.declarations[0].init))
-      return this.parseForIn(node, init$1)
+      { return this.parseForIn(node, init$1) }
     return this.parseFor(node, init$1)
   }
-  var refDestructuringErrors = new DestructuringErrors
-  var init = this.parseExpression(true, refDestructuringErrors)
-  if (this.type === tt._in || (this.options.ecmaVersion >= 6 && this.isContextual("of"))) {
-    this.toAssignable(init)
-    this.checkLVal(init)
-    this.checkPatternErrors(refDestructuringErrors, true)
+  var refDestructuringErrors = new DestructuringErrors;
+  var init = this.parseExpression(true, refDestructuringErrors);
+  if (this.type === types._in || (this.options.ecmaVersion >= 6 && this.isContextual("of"))) {
+    this.toAssignable(init);
+    this.checkLVal(init);
+    this.checkPatternErrors(refDestructuringErrors, true);
     return this.parseForIn(node, init)
   } else {
-    this.checkExpressionErrors(refDestructuringErrors, true)
+    this.checkExpressionErrors(refDestructuringErrors, true);
   }
   return this.parseFor(node, init)
-}
+};
 
 pp$1.parseFunctionStatement = function(node, isAsync) {
-  this.next()
+  this.next();
   return this.parseFunction(node, true, false, isAsync)
-}
+};
 
 pp$1.isFunction = function() {
-  return this.type === tt._function || this.isAsyncFunction()
-}
+  return this.type === types._function || this.isAsyncFunction()
+};
 
 pp$1.parseIfStatement = function(node) {
-  this.next()
-  node.test = this.parseParenExpression()
+  this.next();
+  node.test = this.parseParenExpression();
   // allow function declarations in branches, but only in non-strict mode
-  node.consequent = this.parseStatement(!this.strict && this.isFunction())
-  node.alternate = this.eat(tt._else) ? this.parseStatement(!this.strict && this.isFunction()) : null
+  node.consequent = this.parseStatement(!this.strict && this.isFunction());
+  node.alternate = this.eat(types._else) ? this.parseStatement(!this.strict && this.isFunction()) : null;
   return this.finishNode(node, "IfStatement")
-}
+};
 
 pp$1.parseReturnStatement = function(node) {
   if (!this.inFunction && !this.options.allowReturnOutsideFunction)
-    this.raise(this.start, "'return' outside of function")
-  this.next()
+    { this.raise(this.start, "'return' outside of function"); }
+  this.next();
 
   // In `return` (and `break`/`continue`), the keywords with
   // optional arguments, we eagerly look for a semicolon or the
   // possibility to insert one.
 
-  if (this.eat(tt.semi) || this.insertSemicolon()) node.argument = null
-  else { node.argument = this.parseExpression(); this.semicolon() }
+  if (this.eat(types.semi) || this.insertSemicolon()) { node.argument = null; }
+  else { node.argument = this.parseExpression(); this.semicolon(); }
   return this.finishNode(node, "ReturnStatement")
-}
+};
 
 pp$1.parseSwitchStatement = function(node) {
   var this$1 = this;
 
-  this.next()
-  node.discriminant = this.parseParenExpression()
-  node.cases = []
-  this.expect(tt.braceL)
-  this.labels.push(switchLabel)
-  this.enterLexicalScope()
+  this.next();
+  node.discriminant = this.parseParenExpression();
+  node.cases = [];
+  this.expect(types.braceL);
+  this.labels.push(switchLabel);
+  this.enterLexicalScope();
 
   // Statements under must be grouped (by label) in SwitchCase
   // nodes. `cur` is used to keep the node that we are currently
   // adding statements to.
 
-  var cur
-  for (var sawDefault = false; this.type != tt.braceR;) {
-    if (this$1.type === tt._case || this$1.type === tt._default) {
-      var isCase = this$1.type === tt._case
-      if (cur) this$1.finishNode(cur, "SwitchCase")
-      node.cases.push(cur = this$1.startNode())
-      cur.consequent = []
-      this$1.next()
+  var cur;
+  for (var sawDefault = false; this.type != types.braceR;) {
+    if (this$1.type === types._case || this$1.type === types._default) {
+      var isCase = this$1.type === types._case;
+      if (cur) { this$1.finishNode(cur, "SwitchCase"); }
+      node.cases.push(cur = this$1.startNode());
+      cur.consequent = [];
+      this$1.next();
       if (isCase) {
-        cur.test = this$1.parseExpression()
+        cur.test = this$1.parseExpression();
       } else {
-        if (sawDefault) this$1.raiseRecoverable(this$1.lastTokStart, "Multiple default clauses")
-        sawDefault = true
-        cur.test = null
+        if (sawDefault) { this$1.raiseRecoverable(this$1.lastTokStart, "Multiple default clauses"); }
+        sawDefault = true;
+        cur.test = null;
       }
-      this$1.expect(tt.colon)
+      this$1.expect(types.colon);
     } else {
-      if (!cur) this$1.unexpected()
-      cur.consequent.push(this$1.parseStatement(true))
+      if (!cur) { this$1.unexpected(); }
+      cur.consequent.push(this$1.parseStatement(true));
     }
   }
-  this.exitLexicalScope()
-  if (cur) this.finishNode(cur, "SwitchCase")
-  this.next() // Closing brace
-  this.labels.pop()
+  this.exitLexicalScope();
+  if (cur) { this.finishNode(cur, "SwitchCase"); }
+  this.next(); // Closing brace
+  this.labels.pop();
   return this.finishNode(node, "SwitchStatement")
-}
+};
 
 pp$1.parseThrowStatement = function(node) {
-  this.next()
+  this.next();
   if (lineBreak.test(this.input.slice(this.lastTokEnd, this.start)))
-    this.raise(this.lastTokEnd, "Illegal newline after throw")
-  node.argument = this.parseExpression()
-  this.semicolon()
+    { this.raise(this.lastTokEnd, "Illegal newline after throw"); }
+  node.argument = this.parseExpression();
+  this.semicolon();
   return this.finishNode(node, "ThrowStatement")
-}
+};
 
 // Reused empty array added for node fields that are always empty.
 
-var empty = []
+var empty = [];
 
 pp$1.parseTryStatement = function(node) {
-  this.next()
-  node.block = this.parseBlock()
-  node.handler = null
-  if (this.type === tt._catch) {
-    var clause = this.startNode()
-    this.next()
-    this.expect(tt.parenL)
-    clause.param = this.parseBindingAtom()
-    this.enterLexicalScope()
-    this.checkLVal(clause.param, "let")
-    this.expect(tt.parenR)
-    clause.body = this.parseBlock(false)
-    this.exitLexicalScope()
-    node.handler = this.finishNode(clause, "CatchClause")
-  }
-  node.finalizer = this.eat(tt._finally) ? this.parseBlock() : null
+  this.next();
+  node.block = this.parseBlock();
+  node.handler = null;
+  if (this.type === types._catch) {
+    var clause = this.startNode();
+    this.next();
+    this.expect(types.parenL);
+    clause.param = this.parseBindingAtom();
+    this.enterLexicalScope();
+    this.checkLVal(clause.param, "let");
+    this.expect(types.parenR);
+    clause.body = this.parseBlock(false);
+    this.exitLexicalScope();
+    node.handler = this.finishNode(clause, "CatchClause");
+  }
+  node.finalizer = this.eat(types._finally) ? this.parseBlock() : null;
   if (!node.handler && !node.finalizer)
-    this.raise(node.start, "Missing catch or finally clause")
+    { this.raise(node.start, "Missing catch or finally clause"); }
   return this.finishNode(node, "TryStatement")
-}
+};
 
 pp$1.parseVarStatement = function(node, kind) {
-  this.next()
-  this.parseVar(node, false, kind)
-  this.semicolon()
+  this.next();
+  this.parseVar(node, false, kind);
+  this.semicolon();
   return this.finishNode(node, "VariableDeclaration")
-}
+};
 
 pp$1.parseWhileStatement = function(node) {
-  this.next()
-  node.test = this.parseParenExpression()
-  this.labels.push(loopLabel)
-  node.body = this.parseStatement(false)
-  this.labels.pop()
+  this.next();
+  node.test = this.parseParenExpression();
+  this.labels.push(loopLabel);
+  node.body = this.parseStatement(false);
+  this.labels.pop();
   return this.finishNode(node, "WhileStatement")
-}
+};
 
 pp$1.parseWithStatement = function(node) {
-  if (this.strict) this.raise(this.start, "'with' in strict mode")
-  this.next()
-  node.object = this.parseParenExpression()
-  node.body = this.parseStatement(false)
+  if (this.strict) { this.raise(this.start, "'with' in strict mode"); }
+  this.next();
+  node.object = this.parseParenExpression();
+  node.body = this.parseStatement(false);
   return this.finishNode(node, "WithStatement")
-}
+};
 
 pp$1.parseEmptyStatement = function(node) {
-  this.next()
+  this.next();
   return this.finishNode(node, "EmptyStatement")
-}
+};
 
 pp$1.parseLabeledStatement = function(node, maybeName, expr) {
   var this$1 = this;
 
-  for (var i = 0; i < this.labels.length; ++i)
-    if (this$1.labels[i].name === maybeName) this$1.raise(expr.start, "Label '" + maybeName + "' is already declared")
-  var kind = this.type.isLoop ? "loop" : this.type === tt._switch ? "switch" : null
-  for (var i$1 = this.labels.length - 1; i$1 >= 0; i$1--) {
-    var label = this$1.labels[i$1]
-    if (label.statementStart == node.start) {
-      label.statementStart = this$1.start
-      label.kind = kind
-    } else break
-  }
-  this.labels.push({name: maybeName, kind: kind, statementStart: this.start})
-  node.body = this.parseStatement(true)
+  for (var i$1 = 0, list = this$1.labels; i$1 < list.length; i$1 += 1)
+    {
+    var label = list[i$1];
+
+    if (label.name === maybeName)
+      { this$1.raise(expr.start, "Label '" + maybeName + "' is already declared");
+  } }
+  var kind = this.type.isLoop ? "loop" : this.type === types._switch ? "switch" : null;
+  for (var i = this.labels.length - 1; i >= 0; i--) {
+    var label$1 = this$1.labels[i];
+    if (label$1.statementStart == node.start) {
+      label$1.statementStart = this$1.start;
+      label$1.kind = kind;
+    } else { break }
+  }
+  this.labels.push({name: maybeName, kind: kind, statementStart: this.start});
+  node.body = this.parseStatement(true);
   if (node.body.type == "ClassDeclaration" ||
       node.body.type == "VariableDeclaration" && node.body.kind != "var" ||
       node.body.type == "FunctionDeclaration" && (this.strict || node.body.generator))
-    this.raiseRecoverable(node.body.start, "Invalid labeled declaration")
-  this.labels.pop()
-  node.label = expr
+    { this.raiseRecoverable(node.body.start, "Invalid labeled declaration"); }
+  this.labels.pop();
+  node.label = expr;
   return this.finishNode(node, "LabeledStatement")
-}
+};
 
 pp$1.parseExpressionStatement = function(node, expr) {
-  node.expression = expr
-  this.semicolon()
+  node.expression = expr;
+  this.semicolon();
   return this.finishNode(node, "ExpressionStatement")
-}
+};
 
 // Parse a semicolon-enclosed block of statements, handling `"use
 // strict"` declarations when `allowStrict` is true (used for
@@ -1048,129 +1060,129 @@ pp$1.parseBlock = function(createNewLexicalScope) {
   var this$1 = this;
   if ( createNewLexicalScope === void 0 ) createNewLexicalScope = true;
 
-  var node = this.startNode()
-  node.body = []
-  this.expect(tt.braceL)
+  var node = this.startNode();
+  node.body = [];
+  this.expect(types.braceL);
   if (createNewLexicalScope) {
-    this.enterLexicalScope()
+    this.enterLexicalScope();
   }
-  while (!this.eat(tt.braceR)) {
-    var stmt = this$1.parseStatement(true)
-    node.body.push(stmt)
+  while (!this.eat(types.braceR)) {
+    var stmt = this$1.parseStatement(true);
+    node.body.push(stmt);
   }
   if (createNewLexicalScope) {
-    this.exitLexicalScope()
+    this.exitLexicalScope();
   }
   return this.finishNode(node, "BlockStatement")
-}
+};
 
 // Parse a regular `for` loop. The disambiguation code in
 // `parseStatement` will already have parsed the init statement or
 // expression.
 
 pp$1.parseFor = function(node, init) {
-  node.init = init
-  this.expect(tt.semi)
-  node.test = this.type === tt.semi ? null : this.parseExpression()
-  this.expect(tt.semi)
-  node.update = this.type === tt.parenR ? null : this.parseExpression()
-  this.expect(tt.parenR)
-  this.exitLexicalScope()
-  node.body = this.parseStatement(false)
-  this.labels.pop()
+  node.init = init;
+  this.expect(types.semi);
+  node.test = this.type === types.semi ? null : this.parseExpression();
+  this.expect(types.semi);
+  node.update = this.type === types.parenR ? null : this.parseExpression();
+  this.expect(types.parenR);
+  this.exitLexicalScope();
+  node.body = this.parseStatement(false);
+  this.labels.pop();
   return this.finishNode(node, "ForStatement")
-}
+};
 
 // Parse a `for`/`in` and `for`/`of` loop, which are almost
 // same from parser's perspective.
 
 pp$1.parseForIn = function(node, init) {
-  var type = this.type === tt._in ? "ForInStatement" : "ForOfStatement"
-  this.next()
-  node.left = init
-  node.right = this.parseExpression()
-  this.expect(tt.parenR)
-  this.exitLexicalScope()
-  node.body = this.parseStatement(false)
-  this.labels.pop()
+  var type = this.type === types._in ? "ForInStatement" : "ForOfStatement";
+  this.next();
+  node.left = init;
+  node.right = this.parseExpression();
+  this.expect(types.parenR);
+  this.exitLexicalScope();
+  node.body = this.parseStatement(false);
+  this.labels.pop();
   return this.finishNode(node, type)
-}
+};
 
 // Parse a list of variable declarations.
 
 pp$1.parseVar = function(node, isFor, kind) {
   var this$1 = this;
 
-  node.declarations = []
-  node.kind = kind
+  node.declarations = [];
+  node.kind = kind;
   for (;;) {
-    var decl = this$1.startNode()
-    this$1.parseVarId(decl, kind)
-    if (this$1.eat(tt.eq)) {
-      decl.init = this$1.parseMaybeAssign(isFor)
-    } else if (kind === "const" && !(this$1.type === tt._in || (this$1.options.ecmaVersion >= 6 && this$1.isContextual("of")))) {
-      this$1.unexpected()
-    } else if (decl.id.type != "Identifier" && !(isFor && (this$1.type === tt._in || this$1.isContextual("of")))) {
-      this$1.raise(this$1.lastTokEnd, "Complex binding patterns require an initialization value")
+    var decl = this$1.startNode();
+    this$1.parseVarId(decl, kind);
+    if (this$1.eat(types.eq)) {
+      decl.init = this$1.parseMaybeAssign(isFor);
+    } else if (kind === "const" && !(this$1.type === types._in || (this$1.options.ecmaVersion >= 6 && this$1.isContextual("of")))) {
+      this$1.unexpected();
+    } else if (decl.id.type != "Identifier" && !(isFor && (this$1.type === types._in || this$1.isContextual("of")))) {
+      this$1.raise(this$1.lastTokEnd, "Complex binding patterns require an initialization value");
     } else {
-      decl.init = null
+      decl.init = null;
     }
-    node.declarations.push(this$1.finishNode(decl, "VariableDeclarator"))
-    if (!this$1.eat(tt.comma)) break
+    node.declarations.push(this$1.finishNode(decl, "VariableDeclarator"));
+    if (!this$1.eat(types.comma)) { break }
   }
   return node
-}
+};
 
 pp$1.parseVarId = function(decl, kind) {
-  decl.id = this.parseBindingAtom(kind)
-  this.checkLVal(decl.id, kind, false)
-}
+  decl.id = this.parseBindingAtom(kind);
+  this.checkLVal(decl.id, kind, false);
+};
 
 // Parse a function declaration or literal (depending on the
 // `isStatement` parameter).
 
 pp$1.parseFunction = function(node, isStatement, allowExpressionBody, isAsync) {
-  this.initFunction(node)
+  this.initFunction(node);
   if (this.options.ecmaVersion >= 6 && !isAsync)
-    node.generator = this.eat(tt.star)
+    { node.generator = this.eat(types.star); }
   if (this.options.ecmaVersion >= 8)
-    node.async = !!isAsync
+    { node.async = !!isAsync; }
 
   if (isStatement) {
-    node.id = isStatement === "nullableID" && this.type != tt.name ? null : this.parseIdent()
+    node.id = isStatement === "nullableID" && this.type != types.name ? null : this.parseIdent();
     if (node.id) {
-      this.checkLVal(node.id, "var")
+      this.checkLVal(node.id, "var");
     }
   }
 
   var oldInGen = this.inGenerator, oldInAsync = this.inAsync,
-      oldYieldPos = this.yieldPos, oldAwaitPos = this.awaitPos, oldInFunc = this.inFunction
-  this.inGenerator = node.generator
-  this.inAsync = node.async
-  this.yieldPos = 0
-  this.awaitPos = 0
-  this.inFunction = true
-  this.enterFunctionScope()
+      oldYieldPos = this.yieldPos, oldAwaitPos = this.awaitPos, oldInFunc = this.inFunction;
+  this.inGenerator = node.generator;
+  this.inAsync = node.async;
+  this.yieldPos = 0;
+  this.awaitPos = 0;
+  this.inFunction = true;
+  this.enterFunctionScope();
 
   if (!isStatement)
-    node.id = this.type == tt.name ? this.parseIdent() : null
+    { node.id = this.type == types.name ? this.parseIdent() : null; }
 
-  this.parseFunctionParams(node)
-  this.parseFunctionBody(node, allowExpressionBody)
+  this.parseFunctionParams(node);
+  this.parseFunctionBody(node, allowExpressionBody);
 
-  this.inGenerator = oldInGen
-  this.inAsync = oldInAsync
-  this.yieldPos = oldYieldPos
-  this.awaitPos = oldAwaitPos
-  this.inFunction = oldInFunc
+  this.inGenerator = oldInGen;
+  this.inAsync = oldInAsync;
+  this.yieldPos = oldYieldPos;
+  this.awaitPos = oldAwaitPos;
+  this.inFunction = oldInFunc;
   return this.finishNode(node, isStatement ? "FunctionDeclaration" : "FunctionExpression")
-}
+};
 
 pp$1.parseFunctionParams = function(node) {
-  this.expect(tt.parenL)
-  node.params = this.parseBindingList(tt.parenR, false, this.options.ecmaVersion >= 8, true)
-  this.checkYieldAwaitInDefaultParams()
-}
+  this.expect(types.parenL);
+  node.params = this.parseBindingList(types.parenR, false, this.options.ecmaVersion >= 8);
+  this.checkYieldAwaitInDefaultParams();
+};
 
 // Parse a class declaration or literal (depending on the
 // `isStatement` parameter).
@@ -1178,177 +1190,186 @@ pp$1.parseFunctionParams = function(node) {
 pp$1.parseClass = function(node, isStatement) {
   var this$1 = this;
 
-  this.next()
-
-  this.parseClassId(node, isStatement)
-  this.parseClassSuper(node)
-  var classBody = this.startNode()
-  var hadConstructor = false
-  classBody.body = []
-  this.expect(tt.braceL)
-  while (!this.eat(tt.braceR)) {
-    if (this$1.eat(tt.semi)) continue
-    var method = this$1.startNode()
-    var isGenerator = this$1.eat(tt.star)
-    var isAsync = false
-    var isMaybeStatic = this$1.type === tt.name && this$1.value === "static"
-    this$1.parsePropertyName(method)
-    method.static = isMaybeStatic && this$1.type !== tt.parenL
+  this.next();
+
+  this.parseClassId(node, isStatement);
+  this.parseClassSuper(node);
+  var classBody = this.startNode();
+  var hadConstructor = false;
+  classBody.body = [];
+  this.expect(types.braceL);
+  while (!this.eat(types.braceR)) {
+    if (this$1.eat(types.semi)) { continue }
+    var method = this$1.startNode();
+    var isGenerator = this$1.eat(types.star);
+    var isAsync = false;
+    var isMaybeStatic = this$1.type === types.name && this$1.value === "static";
+    this$1.parsePropertyName(method);
+    method.static = isMaybeStatic && this$1.type !== types.parenL;
     if (method.static) {
-      if (isGenerator) this$1.unexpected()
-      isGenerator = this$1.eat(tt.star)
-      this$1.parsePropertyName(method)
+      if (isGenerator) { this$1.unexpected(); }
+      isGenerator = this$1.eat(types.star);
+      this$1.parsePropertyName(method);
     }
     if (this$1.options.ecmaVersion >= 8 && !isGenerator && !method.computed &&
-        method.key.type === "Identifier" && method.key.name === "async" && this$1.type !== tt.parenL &&
+        method.key.type === "Identifier" && method.key.name === "async" && this$1.type !== types.parenL &&
         !this$1.canInsertSemicolon()) {
-      isAsync = true
-      this$1.parsePropertyName(method)
+      isAsync = true;
+      this$1.parsePropertyName(method);
     }
-    method.kind = "method"
-    var isGetSet = false
+    method.kind = "method";
+    var isGetSet = false;
     if (!method.computed) {
       var key = method.key;
-      if (!isGenerator && !isAsync && key.type === "Identifier" && this$1.type !== tt.parenL && (key.name === "get" || key.name === "set")) {
-        isGetSet = true
-        method.kind = key.name
-        key = this$1.parsePropertyName(method)
+      if (!isGenerator && !isAsync && key.type === "Identifier" && this$1.type !== types.parenL && (key.name === "get" || key.name === "set")) {
+        isGetSet = true;
+        method.kind = key.name;
+        key = this$1.parsePropertyName(method);
       }
       if (!method.static && (key.type === "Identifier" && key.name === "constructor" ||
           key.type === "Literal" && key.value === "constructor")) {
-        if (hadConstructor) this$1.raise(key.start, "Duplicate constructor in the same class")
-        if (isGetSet) this$1.raise(key.start, "Constructor can't have get/set modifier")
-        if (isGenerator) this$1.raise(key.start, "Constructor can't be a generator")
-        if (isAsync) this$1.raise(key.start, "Constructor can't be an async method")
-        method.kind = "constructor"
-        hadConstructor = true
+        if (hadConstructor) { this$1.raise(key.start, "Duplicate constructor in the same class"); }
+        if (isGetSet) { this$1.raise(key.start, "Constructor can't have get/set modifier"); }
+        if (isGenerator) { this$1.raise(key.start, "Constructor can't be a generator"); }
+        if (isAsync) { this$1.raise(key.start, "Constructor can't be an async method"); }
+        method.kind = "constructor";
+        hadConstructor = true;
       }
     }
-    this$1.parseClassMethod(classBody, method, isGenerator, isAsync)
+    this$1.parseClassMethod(classBody, method, isGenerator, isAsync);
     if (isGetSet) {
-      var paramCount = method.kind === "get" ? 0 : 1
+      var paramCount = method.kind === "get" ? 0 : 1;
       if (method.value.params.length !== paramCount) {
-        var start = method.value.start
+        var start = method.value.start;
         if (method.kind === "get")
-          this$1.raiseRecoverable(start, "getter should have no params")
+          { this$1.raiseRecoverable(start, "getter should have no params"); }
         else
-          this$1.raiseRecoverable(start, "setter should have exactly one param")
+          { this$1.raiseRecoverable(start, "setter should have exactly one param"); }
       } else {
         if (method.kind === "set" && method.value.params[0].type === "RestElement")
-          this$1.raiseRecoverable(method.value.params[0].start, "Setter cannot use rest params")
+          { this$1.raiseRecoverable(method.value.params[0].start, "Setter cannot use rest params"); }
       }
     }
   }
-  node.body = this.finishNode(classBody, "ClassBody")
+  node.body = this.finishNode(classBody, "ClassBody");
   return this.finishNode(node, isStatement ? "ClassDeclaration" : "ClassExpression")
-}
+};
 
 pp$1.parseClassMethod = function(classBody, method, isGenerator, isAsync) {
-  method.value = this.parseMethod(isGenerator, isAsync)
-  classBody.body.push(this.finishNode(method, "MethodDefinition"))
-}
+  method.value = this.parseMethod(isGenerator, isAsync);
+  classBody.body.push(this.finishNode(method, "MethodDefinition"));
+};
 
 pp$1.parseClassId = function(node, isStatement) {
-  node.id = this.type === tt.name ? this.parseIdent() : isStatement === true ? this.unexpected() : null
-}
+  node.id = this.type === types.name ? this.parseIdent() : isStatement === true ? this.unexpected() : null;
+};
 
 pp$1.parseClassSuper = function(node) {
-  node.superClass = this.eat(tt._extends) ? this.parseExprSubscripts() : null
-}
+  node.superClass = this.eat(types._extends) ? this.parseExprSubscripts() : null;
+};
 
 // Parses module export declaration.
 
 pp$1.parseExport = function(node, exports) {
   var this$1 = this;
 
-  this.next()
+  this.next();
   // export * from '...'
-  if (this.eat(tt.star)) {
-    this.expectContextual("from")
-    node.source = this.type === tt.string ? this.parseExprAtom() : this.unexpected()
-    this.semicolon()
+  if (this.eat(types.star)) {
+    this.expectContextual("from");
+    node.source = this.type === types.string ? this.parseExprAtom() : this.unexpected();
+    this.semicolon();
     return this.finishNode(node, "ExportAllDeclaration")
   }
-  if (this.eat(tt._default)) { // export default ...
-    this.checkExport(exports, "default", this.lastTokStart)
-    var isAsync
-    if (this.type === tt._function || (isAsync = this.isAsyncFunction())) {
-      var fNode = this.startNode()
-      this.next()
-      if (isAsync) this.next()
-      node.declaration = this.parseFunction(fNode, "nullableID", false, isAsync)
-    } else if (this.type === tt._class) {
-      var cNode = this.startNode()
-      node.declaration = this.parseClass(cNode, "nullableID")
+  if (this.eat(types._default)) { // export default ...
+    this.checkExport(exports, "default", this.lastTokStart);
+    var isAsync;
+    if (this.type === types._function || (isAsync = this.isAsyncFunction())) {
+      var fNode = this.startNode();
+      this.next();
+      if (isAsync) { this.next(); }
+      node.declaration = this.parseFunction(fNode, "nullableID", false, isAsync);
+    } else if (this.type === types._class) {
+      var cNode = this.startNode();
+      node.declaration = this.parseClass(cNode, "nullableID");
     } else {
-      node.declaration = this.parseMaybeAssign()
-      this.semicolon()
+      node.declaration = this.parseMaybeAssign();
+      this.semicolon();
     }
     return this.finishNode(node, "ExportDefaultDeclaration")
   }
   // export var|const|let|function|class ...
   if (this.shouldParseExportStatement()) {
-    node.declaration = this.parseStatement(true)
+    node.declaration = this.parseStatement(true);
     if (node.declaration.type === "VariableDeclaration")
-      this.checkVariableExport(exports, node.declaration.declarations)
+      { this.checkVariableExport(exports, node.declaration.declarations); }
     else
-      this.checkExport(exports, node.declaration.id.name, node.declaration.id.start)
-    node.specifiers = []
-    node.source = null
+      { this.checkExport(exports, node.declaration.id.name, node.declaration.id.start); }
+    node.specifiers = [];
+    node.source = null;
   } else { // export { x, y as z } [from '...']
-    node.declaration = null
-    node.specifiers = this.parseExportSpecifiers(exports)
+    node.declaration = null;
+    node.specifiers = this.parseExportSpecifiers(exports);
     if (this.eatContextual("from")) {
-      node.source = this.type === tt.string ? this.parseExprAtom() : this.unexpected()
+      node.source = this.type === types.string ? this.parseExprAtom() : this.unexpected();
     } else {
       // check for keywords used as local names
-      for (var i = 0; i < node.specifiers.length; i++) {
-        if (this$1.keywords.test(node.specifiers[i].local.name) || this$1.reservedWords.test(node.specifiers[i].local.name)) {
-          this$1.unexpected(node.specifiers[i].local.start)
-        }
+      for (var i = 0, list = node.specifiers; i < list.length; i += 1) {
+        var spec = list[i];
+
+        this$1.checkUnreserved(spec.local);
       }
 
-      node.source = null
+      node.source = null;
     }
-    this.semicolon()
+    this.semicolon();
   }
   return this.finishNode(node, "ExportNamedDeclaration")
-}
+};
 
 pp$1.checkExport = function(exports, name, pos) {
-  if (!exports) return
+  if (!exports) { return }
   if (has(exports, name))
-    this.raiseRecoverable(pos, "Duplicate export '" + name + "'")
-  exports[name] = true
-}
+    { this.raiseRecoverable(pos, "Duplicate export '" + name + "'"); }
+  exports[name] = true;
+};
 
 pp$1.checkPatternExport = function(exports, pat) {
   var this$1 = this;
 
-  var type = pat.type
+  var type = pat.type;
   if (type == "Identifier")
-    this.checkExport(exports, pat.name, pat.start)
+    { this.checkExport(exports, pat.name, pat.start); }
   else if (type == "ObjectPattern")
-    for (var i = 0; i < pat.properties.length; ++i)
-      this$1.checkPatternExport(exports, pat.properties[i].value)
+    { for (var i = 0, list = pat.properties; i < list.length; i += 1)
+      {
+        var prop = list[i];
+
+        this$1.checkPatternExport(exports, prop.value);
+      } }
   else if (type == "ArrayPattern")
-    for (var i$1 = 0; i$1 < pat.elements.length; ++i$1) {
-      var elt = pat.elements[i$1]
-      if (elt) this$1.checkPatternExport(exports, elt)
-    }
+    { for (var i$1 = 0, list$1 = pat.elements; i$1 < list$1.length; i$1 += 1) {
+      var elt = list$1[i$1];
+
+        if (elt) { this$1.checkPatternExport(exports, elt); }
+    } }
   else if (type == "AssignmentPattern")
-    this.checkPatternExport(exports, pat.left)
+    { this.checkPatternExport(exports, pat.left); }
   else if (type == "ParenthesizedExpression")
-    this.checkPatternExport(exports, pat.expression)
-}
+    { this.checkPatternExport(exports, pat.expression); }
+};
 
 pp$1.checkVariableExport = function(exports, decls) {
   var this$1 = this;
 
-  if (!exports) return
-  for (var i = 0; i < decls.length; i++)
-    this$1.checkPatternExport(exports, decls[i].id)
-}
+  if (!exports) { return }
+  for (var i = 0, list = decls; i < list.length; i += 1)
+    {
+    var decl = list[i];
+
+    this$1.checkPatternExport(exports, decl.id);
+  }
+};
 
 pp$1.shouldParseExportStatement = function() {
   return this.type.keyword === "var" ||
@@ -1357,94 +1378,93 @@ pp$1.shouldParseExportStatement = function() {
     this.type.keyword === "function" ||
     this.isLet() ||
     this.isAsyncFunction()
-}
+};
 
 // Parses a comma-separated list of module exports.
 
 pp$1.parseExportSpecifiers = function(exports) {
   var this$1 = this;
 
-  var nodes = [], first = true
+  var nodes = [], first = true;
   // export { x, y as z } [from '...']
-  this.expect(tt.braceL)
-  while (!this.eat(tt.braceR)) {
+  this.expect(types.braceL);
+  while (!this.eat(types.braceR)) {
     if (!first) {
-      this$1.expect(tt.comma)
-      if (this$1.afterTrailingComma(tt.braceR)) break
-    } else first = false
+      this$1.expect(types.comma);
+      if (this$1.afterTrailingComma(types.braceR)) { break }
+    } else { first = false; }
 
-    var node = this$1.startNode()
-    node.local = this$1.parseIdent(true)
-    node.exported = this$1.eatContextual("as") ? this$1.parseIdent(true) : node.local
-    this$1.checkExport(exports, node.exported.name, node.exported.start)
-    nodes.push(this$1.finishNode(node, "ExportSpecifier"))
+    var node = this$1.startNode();
+    node.local = this$1.parseIdent(true);
+    node.exported = this$1.eatContextual("as") ? this$1.parseIdent(true) : node.local;
+    this$1.checkExport(exports, node.exported.name, node.exported.start);
+    nodes.push(this$1.finishNode(node, "ExportSpecifier"));
   }
   return nodes
-}
+};
 
 // Parses import declaration.
 
 pp$1.parseImport = function(node) {
-  this.next()
+  this.next();
   // import '...'
-  if (this.type === tt.string) {
-    node.specifiers = empty
-    node.source = this.parseExprAtom()
+  if (this.type === types.string) {
+    node.specifiers = empty;
+    node.source = this.parseExprAtom();
   } else {
-    node.specifiers = this.parseImportSpecifiers()
-    this.expectContextual("from")
-    node.source = this.type === tt.string ? this.parseExprAtom() : this.unexpected()
+    node.specifiers = this.parseImportSpecifiers();
+    this.expectContextual("from");
+    node.source = this.type === types.string ? this.parseExprAtom() : this.unexpected();
   }
-  this.semicolon()
+  this.semicolon();
   return this.finishNode(node, "ImportDeclaration")
-}
+};
 
 // Parses a comma-separated list of module imports.
 
 pp$1.parseImportSpecifiers = function() {
   var this$1 = this;
 
-  var nodes = [], first = true
-  if (this.type === tt.name) {
+  var nodes = [], first = true;
+  if (this.type === types.name) {
     // import defaultObj, { x, y as z } from '...'
-    var node = this.startNode()
-    node.local = this.parseIdent()
-    this.checkLVal(node.local, "let")
-    nodes.push(this.finishNode(node, "ImportDefaultSpecifier"))
-    if (!this.eat(tt.comma)) return nodes
-  }
-  if (this.type === tt.star) {
-    var node$1 = this.startNode()
-    this.next()
-    this.expectContextual("as")
-    node$1.local = this.parseIdent()
-    this.checkLVal(node$1.local, "let")
-    nodes.push(this.finishNode(node$1, "ImportNamespaceSpecifier"))
+    var node = this.startNode();
+    node.local = this.parseIdent();
+    this.checkLVal(node.local, "let");
+    nodes.push(this.finishNode(node, "ImportDefaultSpecifier"));
+    if (!this.eat(types.comma)) { return nodes }
+  }
+  if (this.type === types.star) {
+    var node$1 = this.startNode();
+    this.next();
+    this.expectContextual("as");
+    node$1.local = this.parseIdent();
+    this.checkLVal(node$1.local, "let");
+    nodes.push(this.finishNode(node$1, "ImportNamespaceSpecifier"));
     return nodes
   }
-  this.expect(tt.braceL)
-  while (!this.eat(tt.braceR)) {
+  this.expect(types.braceL);
+  while (!this.eat(types.braceR)) {
     if (!first) {
-      this$1.expect(tt.comma)
-      if (this$1.afterTrailingComma(tt.braceR)) break
-    } else first = false
+      this$1.expect(types.comma);
+      if (this$1.afterTrailingComma(types.braceR)) { break }
+    } else { first = false; }
 
-    var node$2 = this$1.startNode()
-    node$2.imported = this$1.parseIdent(true)
+    var node$2 = this$1.startNode();
+    node$2.imported = this$1.parseIdent(true);
     if (this$1.eatContextual("as")) {
-      node$2.local = this$1.parseIdent()
+      node$2.local = this$1.parseIdent();
     } else {
-      node$2.local = node$2.imported
-      if (this$1.isKeyword(node$2.local.name)) this$1.unexpected(node$2.local.start)
-      if (this$1.reservedWordsStrict.test(node$2.local.name)) this$1.raiseRecoverable(node$2.local.start, "The keyword '" + node$2.local.name + "' is reserved")
+      this$1.checkUnreserved(node$2.imported);
+      node$2.local = node$2.imported;
     }
-    this$1.checkLVal(node$2.local, "let")
-    nodes.push(this$1.finishNode(node$2, "ImportSpecifier"))
+    this$1.checkLVal(node$2.local, "let");
+    nodes.push(this$1.finishNode(node$2, "ImportSpecifier"));
   }
   return nodes
-}
+};
 
-var pp$2 = Parser.prototype
+var pp$2 = Parser.prototype;
 
 // Convert existing expression atom to assignable pattern
 // if possible.
@@ -1456,7 +1476,7 @@ pp$2.toAssignable = function(node, isBinding) {
     switch (node.type) {
     case "Identifier":
       if (this.inAsync && node.name === "await")
-        this.raise(node.start, "Can not use 'await' as identifier inside an async function")
+        { this.raise(node.start, "Can not use 'await' as identifier inside an async function"); }
       break
 
     case "ObjectPattern":
@@ -1464,27 +1484,28 @@ pp$2.toAssignable = function(node, isBinding) {
       break
 
     case "ObjectExpression":
-      node.type = "ObjectPattern"
-      for (var i = 0; i < node.properties.length; i++) {
-        var prop = node.properties[i]
-        if (prop.kind !== "init") this$1.raise(prop.key.start, "Object pattern can't contain getter or setter")
-        this$1.toAssignable(prop.value, isBinding)
+      node.type = "ObjectPattern";
+      for (var i = 0, list = node.properties; i < list.length; i += 1) {
+        var prop = list[i];
+
+      if (prop.kind !== "init") { this$1.raise(prop.key.start, "Object pattern can't contain getter or setter"); }
+        this$1.toAssignable(prop.value, isBinding);
       }
       break
 
     case "ArrayExpression":
-      node.type = "ArrayPattern"
-      this.toAssignableList(node.elements, isBinding)
+      node.type = "ArrayPattern";
+      this.toAssignableList(node.elements, isBinding);
       break
 
     case "AssignmentExpression":
       if (node.operator === "=") {
-        node.type = "AssignmentPattern"
-        delete node.operator
-        this.toAssignable(node.left, isBinding)
+        node.type = "AssignmentPattern";
+        delete node.operator;
+        this.toAssignable(node.left, isBinding);
         // falls through to AssignmentPattern
       } else {
-        this.raise(node.left.end, "Only '=' operator can be used for specifying default value.")
+        this.raise(node.left.end, "Only '=' operator can be used for specifying default value.");
         break
       }
 
@@ -1492,131 +1513,131 @@ pp$2.toAssignable = function(node, isBinding) {
       break
 
     case "ParenthesizedExpression":
-      node.expression = this.toAssignable(node.expression, isBinding)
+      this.toAssignable(node.expression, isBinding);
       break
 
     case "MemberExpression":
-      if (!isBinding) break
+      if (!isBinding) { break }
 
     default:
-      this.raise(node.start, "Assigning to rvalue")
+      this.raise(node.start, "Assigning to rvalue");
     }
   }
   return node
-}
+};
 
 // Convert list of expression atoms to binding list.
 
 pp$2.toAssignableList = function(exprList, isBinding) {
   var this$1 = this;
 
-  var end = exprList.length
+  var end = exprList.length;
   if (end) {
-    var last = exprList[end - 1]
+    var last = exprList[end - 1];
     if (last && last.type == "RestElement") {
-      --end
+      --end;
     } else if (last && last.type == "SpreadElement") {
-      last.type = "RestElement"
-      var arg = last.argument
-      this.toAssignable(arg, isBinding)
-      if (arg.type !== "Identifier" && arg.type !== "MemberExpression" && arg.type !== "ArrayPattern")
-        this.unexpected(arg.start)
-      --end
+      last.type = "RestElement";
+      var arg = last.argument;
+      this.toAssignable(arg, isBinding);
+      --end;
     }
 
-    if (isBinding && last && last.type === "RestElement" && last.argument.type !== "Identifier")
-      this.unexpected(last.argument.start)
+    if (this.options.ecmaVersion === 6 && isBinding && last && last.type === "RestElement" && last.argument.type !== "Identifier")
+      { this.unexpected(last.argument.start); }
   }
   for (var i = 0; i < end; i++) {
-    var elt = exprList[i]
-    if (elt) this$1.toAssignable(elt, isBinding)
+    var elt = exprList[i];
+    if (elt) { this$1.toAssignable(elt, isBinding); }
   }
   return exprList
-}
+};
 
 // Parses spread element.
 
 pp$2.parseSpread = function(refDestructuringErrors) {
-  var node = this.startNode()
-  this.next()
-  node.argument = this.parseMaybeAssign(false, refDestructuringErrors)
+  var node = this.startNode();
+  this.next();
+  node.argument = this.parseMaybeAssign(false, refDestructuringErrors);
   return this.finishNode(node, "SpreadElement")
-}
+};
 
-pp$2.parseRest = function(allowNonIdent) {
-  var node = this.startNode()
-  this.next()
+pp$2.parseRestBinding = function() {
+  var node = this.startNode();
+  this.next();
 
   // RestElement inside of a function parameter must be an identifier
-  if (allowNonIdent) node.argument = this.type === tt.name ? this.parseIdent() : this.unexpected()
-  else node.argument = this.type === tt.name || this.type === tt.bracketL ? this.parseBindingAtom() : this.unexpected()
+  if (this.options.ecmaVersion === 6 && this.type !== types.name)
+    { this.unexpected(); }
+
+  node.argument = this.parseBindingAtom();
 
   return this.finishNode(node, "RestElement")
-}
+};
 
 // Parses lvalue (assignable) atom.
 
 pp$2.parseBindingAtom = function() {
-  if (this.options.ecmaVersion < 6) return this.parseIdent()
+  if (this.options.ecmaVersion < 6) { return this.parseIdent() }
   switch (this.type) {
-  case tt.name:
+  case types.name:
     return this.parseIdent()
 
-  case tt.bracketL:
-    var node = this.startNode()
-    this.next()
-    node.elements = this.parseBindingList(tt.bracketR, true, true)
+  case types.bracketL:
+    var node = this.startNode();
+    this.next();
+    node.elements = this.parseBindingList(types.bracketR, true, true);
     return this.finishNode(node, "ArrayPattern")
 
-  case tt.braceL:
+  case types.braceL:
     return this.parseObj(true)
 
   default:
-    this.unexpected()
+    this.unexpected();
   }
-}
+};
 
-pp$2.parseBindingList = function(close, allowEmpty, allowTrailingComma, allowNonIdent) {
+pp$2.parseBindingList = function(close, allowEmpty, allowTrailingComma) {
   var this$1 = this;
 
-  var elts = [], first = true
+  var elts = [], first = true;
   while (!this.eat(close)) {
-    if (first) first = false
-    else this$1.expect(tt.comma)
-    if (allowEmpty && this$1.type === tt.comma) {
-      elts.push(null)
+    if (first) { first = false; }
+    else { this$1.expect(types.comma); }
+    if (allowEmpty && this$1.type === types.comma) {
+      elts.push(null);
     } else if (allowTrailingComma && this$1.afterTrailingComma(close)) {
       break
-    } else if (this$1.type === tt.ellipsis) {
-      var rest = this$1.parseRest(allowNonIdent)
-      this$1.parseBindingListItem(rest)
-      elts.push(rest)
-      if (this$1.type === tt.comma) this$1.raise(this$1.start, "Comma is not permitted after the rest element")
-      this$1.expect(close)
+    } else if (this$1.type === types.ellipsis) {
+      var rest = this$1.parseRestBinding();
+      this$1.parseBindingListItem(rest);
+      elts.push(rest);
+      if (this$1.type === types.comma) { this$1.raise(this$1.start, "Comma is not permitted after the rest element"); }
+      this$1.expect(close);
       break
     } else {
-      var elem = this$1.parseMaybeDefault(this$1.start, this$1.startLoc)
-      this$1.parseBindingListItem(elem)
-      elts.push(elem)
+      var elem = this$1.parseMaybeDefault(this$1.start, this$1.startLoc);
+      this$1.parseBindingListItem(elem);
+      elts.push(elem);
     }
   }
   return elts
-}
+};
 
 pp$2.parseBindingListItem = function(param) {
   return param
-}
+};
 
 // Parses assignment pattern around given atom if possible.
 
 pp$2.parseMaybeDefault = function(startPos, startLoc, left) {
-  left = left || this.parseBindingAtom()
-  if (this.options.ecmaVersion < 6 || !this.eat(tt.eq)) return left
-  var node = this.startNodeAt(startPos, startLoc)
-  node.left = left
-  node.right = this.parseMaybeAssign()
+  left = left || this.parseBindingAtom();
+  if (this.options.ecmaVersion < 6 || !this.eat(types.eq)) { return left }
+  var node = this.startNodeAt(startPos, startLoc);
+  node.left = left;
+  node.right = this.parseMaybeAssign();
   return this.finishNode(node, "AssignmentPattern")
-}
+};
 
 // Verify that a node is an lval — something that can be assigned
 // to.
@@ -1631,59 +1652,64 @@ pp$2.checkLVal = function(expr, bindingType, checkClashes) {
   switch (expr.type) {
   case "Identifier":
     if (this.strict && this.reservedWordsStrictBind.test(expr.name))
-      this.raiseRecoverable(expr.start, (bindingType ? "Binding " : "Assigning to ") + expr.name + " in strict mode")
+      { this.raiseRecoverable(expr.start, (bindingType ? "Binding " : "Assigning to ") + expr.name + " in strict mode"); }
     if (checkClashes) {
       if (has(checkClashes, expr.name))
-        this.raiseRecoverable(expr.start, "Argument name clash")
-      checkClashes[expr.name] = true
+        { this.raiseRecoverable(expr.start, "Argument name clash"); }
+      checkClashes[expr.name] = true;
     }
     if (bindingType && bindingType !== "none") {
       if (
         bindingType === "var" && !this.canDeclareVarName(expr.name) ||
         bindingType !== "var" && !this.canDeclareLexicalName(expr.name)
       ) {
-        this.raiseRecoverable(expr.start, ("Identifier '" + (expr.name) + "' has already been declared"))
+        this.raiseRecoverable(expr.start, ("Identifier '" + (expr.name) + "' has already been declared"));
       }
       if (bindingType === "var") {
-        this.declareVarName(expr.name)
+        this.declareVarName(expr.name);
       } else {
-        this.declareLexicalName(expr.name)
+        this.declareLexicalName(expr.name);
       }
     }
     break
 
   case "MemberExpression":
-    if (bindingType) this.raiseRecoverable(expr.start, (bindingType ? "Binding" : "Assigning to") + " member expression")
+    if (bindingType) { this.raiseRecoverable(expr.start, (bindingType ? "Binding" : "Assigning to") + " member expression"); }
     break
 
   case "ObjectPattern":
-    for (var i = 0; i < expr.properties.length; i++)
-      this$1.checkLVal(expr.properties[i].value, bindingType, checkClashes)
+    for (var i = 0, list = expr.properties; i < list.length; i += 1)
+      {
+    var prop = list[i];
+
+    this$1.checkLVal(prop.value, bindingType, checkClashes);
+  }
     break
 
   case "ArrayPattern":
-    for (var i$1 = 0; i$1 < expr.elements.length; i$1++) {
-      var elem = expr.elements[i$1]
-      if (elem) this$1.checkLVal(elem, bindingType, checkClashes)
+    for (var i$1 = 0, list$1 = expr.elements; i$1 < list$1.length; i$1 += 1) {
+      var elem = list$1[i$1];
+
+    if (elem) { this$1.checkLVal(elem, bindingType, checkClashes); }
     }
     break
 
   case "AssignmentPattern":
-    this.checkLVal(expr.left, bindingType, checkClashes)
+    this.checkLVal(expr.left, bindingType, checkClashes);
     break
 
   case "RestElement":
-    this.checkLVal(expr.argument, bindingType, checkClashes)
+    this.checkLVal(expr.argument, bindingType, checkClashes);
     break
 
   case "ParenthesizedExpression":
-    this.checkLVal(expr.expression, bindingType, checkClashes)
+    this.checkLVal(expr.expression, bindingType, checkClashes);
     break
 
   default:
-    this.raise(expr.start, (bindingType ? "Binding" : "Assigning to") + " rvalue")
+    this.raise(expr.start, (bindingType ? "Binding" : "Assigning to") + " rvalue");
   }
-}
+};
 
 // A recursive descent parser operates by defining functions for all
 // syntactic elements, and recursively calling those, each function
@@ -1703,7 +1729,7 @@ pp$2.checkLVal = function(expr, bindingType, checkClashes) {
 //
 // [opp]: http://en.wikipedia.org/wiki/Operator-precedence_parser
 
-var pp$3 = Parser.prototype
+var pp$3 = Parser.prototype;
 
 // Check if property name clashes with already added.
 // Object/class getters and setters are not allowed to clash —
@@ -1712,9 +1738,9 @@ var pp$3 = Parser.prototype
 
 pp$3.checkPropClash = function(prop, propHash) {
   if (this.options.ecmaVersion >= 6 && (prop.computed || prop.method || prop.shorthand))
-    return
+    { return }
   var key = prop.key;
-  var name
+  var name;
   switch (key.type) {
   case "Identifier": name = key.name; break
   case "Literal": name = String(key.value); break
@@ -1723,31 +1749,31 @@ pp$3.checkPropClash = function(prop, propHash) {
   var kind = prop.kind;
   if (this.options.ecmaVersion >= 6) {
     if (name === "__proto__" && kind === "init") {
-      if (propHash.proto) this.raiseRecoverable(key.start, "Redefinition of __proto__ property")
-      propHash.proto = true
+      if (propHash.proto) { this.raiseRecoverable(key.start, "Redefinition of __proto__ property"); }
+      propHash.proto = true;
     }
     return
   }
-  name = "$" + name
-  var other = propHash[name]
+  name = "$" + name;
+  var other = propHash[name];
   if (other) {
-    var redefinition
+    var redefinition;
     if (kind === "init") {
-      redefinition = this.strict && other.init || other.get || other.set
+      redefinition = this.strict && other.init || other.get || other.set;
     } else {
-      redefinition = other.init || other[kind]
+      redefinition = other.init || other[kind];
     }
     if (redefinition)
-      this.raiseRecoverable(key.start, "Redefinition of property")
+      { this.raiseRecoverable(key.start, "Redefinition of property"); }
   } else {
     other = propHash[name] = {
       init: false,
       get: false,
       set: false
-    }
+    };
   }
-  other[kind] = true
-}
+  other[kind] = true;
+};
 
 // ### Expression parsing
 
@@ -1767,82 +1793,82 @@ pp$3.checkPropClash = function(prop, propHash) {
 pp$3.parseExpression = function(noIn, refDestructuringErrors) {
   var this$1 = this;
 
-  var startPos = this.start, startLoc = this.startLoc
-  var expr = this.parseMaybeAssign(noIn, refDestructuringErrors)
-  if (this.type === tt.comma) {
-    var node = this.startNodeAt(startPos, startLoc)
-    node.expressions = [expr]
-    while (this.eat(tt.comma)) node.expressions.push(this$1.parseMaybeAssign(noIn, refDestructuringErrors))
+  var startPos = this.start, startLoc = this.startLoc;
+  var expr = this.parseMaybeAssign(noIn, refDestructuringErrors);
+  if (this.type === types.comma) {
+    var node = this.startNodeAt(startPos, startLoc);
+    node.expressions = [expr];
+    while (this.eat(types.comma)) { node.expressions.push(this$1.parseMaybeAssign(noIn, refDestructuringErrors)); }
     return this.finishNode(node, "SequenceExpression")
   }
   return expr
-}
+};
 
 // Parse an assignment expression. This includes applications of
 // operators like `+=`.
 
 pp$3.parseMaybeAssign = function(noIn, refDestructuringErrors, afterLeftParse) {
-  if (this.inGenerator && this.isContextual("yield")) return this.parseYield()
+  if (this.inGenerator && this.isContextual("yield")) { return this.parseYield() }
 
-  var ownDestructuringErrors = false, oldParenAssign = -1, oldTrailingComma = -1
+  var ownDestructuringErrors = false, oldParenAssign = -1, oldTrailingComma = -1;
   if (refDestructuringErrors) {
-    oldParenAssign = refDestructuringErrors.parenthesizedAssign
-    oldTrailingComma = refDestructuringErrors.trailingComma
-    refDestructuringErrors.parenthesizedAssign = refDestructuringErrors.trailingComma = -1
+    oldParenAssign = refDestructuringErrors.parenthesizedAssign;
+    oldTrailingComma = refDestructuringErrors.trailingComma;
+    refDestructuringErrors.parenthesizedAssign = refDestructuringErrors.trailingComma = -1;
   } else {
-    refDestructuringErrors = new DestructuringErrors
-    ownDestructuringErrors = true
+    refDestructuringErrors = new DestructuringErrors;
+    ownDestructuringErrors = true;
   }
 
-  var startPos = this.start, startLoc = this.startLoc
-  if (this.type == tt.parenL || this.type == tt.name)
-    this.potentialArrowAt = this.start
-  var left = this.parseMaybeConditional(noIn, refDestructuringErrors)
-  if (afterLeftParse) left = afterLeftParse.call(this, left, startPos, startLoc)
+  var startPos = this.start, startLoc = this.startLoc;
+  if (this.type == types.parenL || this.type == types.name)
+    { this.potentialArrowAt = this.start; }
+  var left = this.parseMaybeConditional(noIn, refDestructuringErrors);
+  if (afterLeftParse) { left = afterLeftParse.call(this, left, startPos, startLoc); }
   if (this.type.isAssign) {
-    this.checkPatternErrors(refDestructuringErrors, true)
-    if (!ownDestructuringErrors) DestructuringErrors.call(refDestructuringErrors)
-    var node = this.startNodeAt(startPos, startLoc)
-    node.operator = this.value
-    node.left = this.type === tt.eq ? this.toAssignable(left) : left
-    refDestructuringErrors.shorthandAssign = -1 // reset because shorthand default was used correctly
-    this.checkLVal(left)
-    this.next()
-    node.right = this.parseMaybeAssign(noIn)
+    this.checkPatternErrors(refDestructuringErrors, true);
+    if (!ownDestructuringErrors) { DestructuringErrors.call(refDestructuringErrors); }
+    var node = this.startNodeAt(startPos, startLoc);
+    node.operator = this.value;
+    node.left = this.type === types.eq ? this.toAssignable(left) : left;
+    refDestructuringErrors.shorthandAssign = -1; // reset because shorthand default was used correctly
+    this.checkLVal(left);
+    this.next();
+    node.right = this.parseMaybeAssign(noIn);
     return this.finishNode(node, "AssignmentExpression")
   } else {
-    if (ownDestructuringErrors) this.checkExpressionErrors(refDestructuringErrors, true)
+    if (ownDestructuringErrors) { this.checkExpressionErrors(refDestructuringErrors, true); }
   }
-  if (oldParenAssign > -1) refDestructuringErrors.parenthesizedAssign = oldParenAssign
-  if (oldTrailingComma > -1) refDestructuringErrors.trailingComma = oldTrailingComma
+  if (oldParenAssign > -1) { refDestructuringErrors.parenthesizedAssign = oldParenAssign; }
+  if (oldTrailingComma > -1) { refDestructuringErrors.trailingComma = oldTrailingComma; }
   return left
-}
+};
 
 // Parse a ternary conditional (`?:`) operator.
 
 pp$3.parseMaybeConditional = function(noIn, refDestructuringErrors) {
-  var startPos = this.start, startLoc = this.startLoc
-  var expr = this.parseExprOps(noIn, refDestructuringErrors)
-  if (this.checkExpressionErrors(refDestructuringErrors)) return expr
-  if (this.eat(tt.question)) {
-    var node = this.startNodeAt(startPos, startLoc)
-    node.test = expr
-    node.consequent = this.parseMaybeAssign()
-    this.expect(tt.colon)
-    node.alternate = this.parseMaybeAssign(noIn)
+  var startPos = this.start, startLoc = this.startLoc;
+  var expr = this.parseExprOps(noIn, refDestructuringErrors);
+  if (this.checkExpressionErrors(refDestructuringErrors)) { return expr }
+  if (this.eat(types.question)) {
+    var node = this.startNodeAt(startPos, startLoc);
+    node.test = expr;
+    node.consequent = this.parseMaybeAssign();
+    this.expect(types.colon);
+    node.alternate = this.parseMaybeAssign(noIn);
     return this.finishNode(node, "ConditionalExpression")
   }
   return expr
-}
+};
 
 // Start the precedence parser.
 
 pp$3.parseExprOps = function(noIn, refDestructuringErrors) {
-  var startPos = this.start, startLoc = this.startLoc
-  var expr = this.parseMaybeUnary(refDestructuringErrors, false)
-  if (this.checkExpressionErrors(refDestructuringErrors)) return expr
+  var startPos = this.start, startLoc = this.startLoc;
+  var expr = this.parseMaybeUnary(refDestructuringErrors, false);
+  if (this.checkExpressionErrors(refDestructuringErrors)) { return expr }
   return expr.start == startPos && expr.type === "ArrowFunctionExpression" ? expr : this.parseExprOp(expr, startPos, startLoc, -1, noIn)
-}
+};
 
 // Parse binary operators with the operator precedence parsing
 // algorithm. `left` is the left-hand side of the operator.
@@ -1851,128 +1877,128 @@ pp$3.parseExprOps = function(noIn, refDestructuringErrors) {
 // operator that has a lower precedence than the set it is parsing.
 
 pp$3.parseExprOp = function(left, leftStartPos, leftStartLoc, minPrec, noIn) {
-  var prec = this.type.binop
-  if (prec != null && (!noIn || this.type !== tt._in)) {
+  var prec = this.type.binop;
+  if (prec != null && (!noIn || this.type !== types._in)) {
     if (prec > minPrec) {
-      var logical = this.type === tt.logicalOR || this.type === tt.logicalAND
-      var op = this.value
-      this.next()
-      var startPos = this.start, startLoc = this.startLoc
-      var right = this.parseExprOp(this.parseMaybeUnary(null, false), startPos, startLoc, prec, noIn)
-      var node = this.buildBinary(leftStartPos, leftStartLoc, left, right, op, logical)
+      var logical = this.type === types.logicalOR || this.type === types.logicalAND;
+      var op = this.value;
+      this.next();
+      var startPos = this.start, startLoc = this.startLoc;
+      var right = this.parseExprOp(this.parseMaybeUnary(null, false), startPos, startLoc, prec, noIn);
+      var node = this.buildBinary(leftStartPos, leftStartLoc, left, right, op, logical);
       return this.parseExprOp(node, leftStartPos, leftStartLoc, minPrec, noIn)
     }
   }
   return left
-}
+};
 
 pp$3.buildBinary = function(startPos, startLoc, left, right, op, logical) {
-  var node = this.startNodeAt(startPos, startLoc)
-  node.left = left
-  node.operator = op
-  node.right = right
+  var node = this.startNodeAt(startPos, startLoc);
+  node.left = left;
+  node.operator = op;
+  node.right = right;
   return this.finishNode(node, logical ? "LogicalExpression" : "BinaryExpression")
-}
+};
 
 // Parse unary operators, both prefix and postfix.
 
 pp$3.parseMaybeUnary = function(refDestructuringErrors, sawUnary) {
   var this$1 = this;
 
-  var startPos = this.start, startLoc = this.startLoc, expr
+  var startPos = this.start, startLoc = this.startLoc, expr;
   if (this.inAsync && this.isContextual("await")) {
-    expr = this.parseAwait(refDestructuringErrors)
-    sawUnary = true
+    expr = this.parseAwait(refDestructuringErrors);
+    sawUnary = true;
   } else if (this.type.prefix) {
-    var node = this.startNode(), update = this.type === tt.incDec
-    node.operator = this.value
-    node.prefix = true
-    this.next()
-    node.argument = this.parseMaybeUnary(null, true)
-    this.checkExpressionErrors(refDestructuringErrors, true)
-    if (update) this.checkLVal(node.argument)
+    var node = this.startNode(), update = this.type === types.incDec;
+    node.operator = this.value;
+    node.prefix = true;
+    this.next();
+    node.argument = this.parseMaybeUnary(null, true);
+    this.checkExpressionErrors(refDestructuringErrors, true);
+    if (update) { this.checkLVal(node.argument); }
     else if (this.strict && node.operator === "delete" &&
              node.argument.type === "Identifier")
-      this.raiseRecoverable(node.start, "Deleting local variable in strict mode")
-    else sawUnary = true
-    expr = this.finishNode(node, update ? "UpdateExpression" : "UnaryExpression")
+      { this.raiseRecoverable(node.start, "Deleting local variable in strict mode"); }
+    else { sawUnary = true; }
+    expr = this.finishNode(node, update ? "UpdateExpression" : "UnaryExpression");
   } else {
-    expr = this.parseExprSubscripts(refDestructuringErrors)
-    if (this.checkExpressionErrors(refDestructuringErrors)) return expr
+    expr = this.parseExprSubscripts(refDestructuringErrors);
+    if (this.checkExpressionErrors(refDestructuringErrors)) { return expr }
     while (this.type.postfix && !this.canInsertSemicolon()) {
-      var node$1 = this$1.startNodeAt(startPos, startLoc)
-      node$1.operator = this$1.value
-      node$1.prefix = false
-      node$1.argument = expr
-      this$1.checkLVal(expr)
-      this$1.next()
-      expr = this$1.finishNode(node$1, "UpdateExpression")
+      var node$1 = this$1.startNodeAt(startPos, startLoc);
+      node$1.operator = this$1.value;
+      node$1.prefix = false;
+      node$1.argument = expr;
+      this$1.checkLVal(expr);
+      this$1.next();
+      expr = this$1.finishNode(node$1, "UpdateExpression");
     }
   }
 
-  if (!sawUnary && this.eat(tt.starstar))
-    return this.buildBinary(startPos, startLoc, expr, this.parseMaybeUnary(null, false), "**", false)
+  if (!sawUnary && this.eat(types.starstar))
+    { return this.buildBinary(startPos, startLoc, expr, this.parseMaybeUnary(null, false), "**", false) }
   else
-    return expr
-}
+    { return expr }
+};
 
 // Parse call, dot, and `[]`-subscript expressions.
 
 pp$3.parseExprSubscripts = function(refDestructuringErrors) {
-  var startPos = this.start, startLoc = this.startLoc
-  var expr = this.parseExprAtom(refDestructuringErrors)
-  var skipArrowSubscripts = expr.type === "ArrowFunctionExpression" && this.input.slice(this.lastTokStart, this.lastTokEnd) !== ")"
-  if (this.checkExpressionErrors(refDestructuringErrors) || skipArrowSubscripts) return expr
-  var result = this.parseSubscripts(expr, startPos, startLoc)
+  var startPos = this.start, startLoc = this.startLoc;
+  var expr = this.parseExprAtom(refDestructuringErrors);
+  var skipArrowSubscripts = expr.type === "ArrowFunctionExpression" && this.input.slice(this.lastTokStart, this.lastTokEnd) !== ")";
+  if (this.checkExpressionErrors(refDestructuringErrors) || skipArrowSubscripts) { return expr }
+  var result = this.parseSubscripts(expr, startPos, startLoc);
   if (refDestructuringErrors && result.type === "MemberExpression") {
-    if (refDestructuringErrors.parenthesizedAssign >= result.start) refDestructuringErrors.parenthesizedAssign = -1
-    if (refDestructuringErrors.parenthesizedBind >= result.start) refDestructuringErrors.parenthesizedBind = -1
+    if (refDestructuringErrors.parenthesizedAssign >= result.start) { refDestructuringErrors.parenthesizedAssign = -1; }
+    if (refDestructuringErrors.parenthesizedBind >= result.start) { refDestructuringErrors.parenthesizedBind = -1; }
   }
   return result
-}
+};
 
 pp$3.parseSubscripts = function(base, startPos, startLoc, noCalls) {
   var this$1 = this;
 
   var maybeAsyncArrow = this.options.ecmaVersion >= 8 && base.type === "Identifier" && base.name === "async" &&
-      this.lastTokEnd == base.end && !this.canInsertSemicolon()
-  for (var computed;;) {
-    if ((computed = this$1.eat(tt.bracketL)) || this$1.eat(tt.dot)) {
-      var node = this$1.startNodeAt(startPos, startLoc)
-      node.object = base
-      node.property = computed ? this$1.parseExpression() : this$1.parseIdent(true)
-      node.computed = !!computed
-      if (computed) this$1.expect(tt.bracketR)
-      base = this$1.finishNode(node, "MemberExpression")
-    } else if (!noCalls && this$1.eat(tt.parenL)) {
-      var refDestructuringErrors = new DestructuringErrors, oldYieldPos = this$1.yieldPos, oldAwaitPos = this$1.awaitPos
-      this$1.yieldPos = 0
-      this$1.awaitPos = 0
-      var exprList = this$1.parseExprList(tt.parenR, this$1.options.ecmaVersion >= 8, false, refDestructuringErrors)
-      if (maybeAsyncArrow && !this$1.canInsertSemicolon() && this$1.eat(tt.arrow)) {
-        this$1.checkPatternErrors(refDestructuringErrors, false)
-        this$1.checkYieldAwaitInDefaultParams()
-        this$1.yieldPos = oldYieldPos
-        this$1.awaitPos = oldAwaitPos
+      this.lastTokEnd == base.end && !this.canInsertSemicolon();
+  for (var computed = (void 0);;) {
+    if ((computed = this$1.eat(types.bracketL)) || this$1.eat(types.dot)) {
+      var node = this$1.startNodeAt(startPos, startLoc);
+      node.object = base;
+      node.property = computed ? this$1.parseExpression() : this$1.parseIdent(true);
+      node.computed = !!computed;
+      if (computed) { this$1.expect(types.bracketR); }
+      base = this$1.finishNode(node, "MemberExpression");
+    } else if (!noCalls && this$1.eat(types.parenL)) {
+      var refDestructuringErrors = new DestructuringErrors, oldYieldPos = this$1.yieldPos, oldAwaitPos = this$1.awaitPos;
+      this$1.yieldPos = 0;
+      this$1.awaitPos = 0;
+      var exprList = this$1.parseExprList(types.parenR, this$1.options.ecmaVersion >= 8, false, refDestructuringErrors);
+      if (maybeAsyncArrow && !this$1.canInsertSemicolon() && this$1.eat(types.arrow)) {
+        this$1.checkPatternErrors(refDestructuringErrors, false);
+        this$1.checkYieldAwaitInDefaultParams();
+        this$1.yieldPos = oldYieldPos;
+        this$1.awaitPos = oldAwaitPos;
         return this$1.parseArrowExpression(this$1.startNodeAt(startPos, startLoc), exprList, true)
       }
-      this$1.checkExpressionErrors(refDestructuringErrors, true)
-      this$1.yieldPos = oldYieldPos || this$1.yieldPos
-      this$1.awaitPos = oldAwaitPos || this$1.awaitPos
-      var node$1 = this$1.startNodeAt(startPos, startLoc)
-      node$1.callee = base
-      node$1.arguments = exprList
-      base = this$1.finishNode(node$1, "CallExpression")
-    } else if (this$1.type === tt.backQuote) {
-      var node$2 = this$1.startNodeAt(startPos, startLoc)
-      node$2.tag = base
-      node$2.quasi = this$1.parseTemplate()
-      base = this$1.finishNode(node$2, "TaggedTemplateExpression")
+      this$1.checkExpressionErrors(refDestructuringErrors, true);
+      this$1.yieldPos = oldYieldPos || this$1.yieldPos;
+      this$1.awaitPos = oldAwaitPos || this$1.awaitPos;
+      var node$1 = this$1.startNodeAt(startPos, startLoc);
+      node$1.callee = base;
+      node$1.arguments = exprList;
+      base = this$1.finishNode(node$1, "CallExpression");
+    } else if (this$1.type === types.backQuote) {
+      var node$2 = this$1.startNodeAt(startPos, startLoc);
+      node$2.tag = base;
+      node$2.quasi = this$1.parseTemplate({isTagged: true});
+      base = this$1.finishNode(node$2, "TaggedTemplateExpression");
     } else {
       return base
     }
   }
-}
+};
 
 // Parse an atomic expression — either a single token that is an
 // expression, an expression started by a keyword like `function` or
@@ -1980,178 +2006,178 @@ pp$3.parseSubscripts = function(base, startPos, startLoc, noCalls) {
 // or `{}`.
 
 pp$3.parseExprAtom = function(refDestructuringErrors) {
-  var node, canBeArrow = this.potentialArrowAt == this.start
+  var node, canBeArrow = this.potentialArrowAt == this.start;
   switch (this.type) {
-  case tt._super:
+  case types._super:
     if (!this.inFunction)
-      this.raise(this.start, "'super' outside of function or class")
+      { this.raise(this.start, "'super' outside of function or class"); }
 
-  case tt._this:
-    var type = this.type === tt._this ? "ThisExpression" : "Super"
-    node = this.startNode()
-    this.next()
+  case types._this:
+    var type = this.type === types._this ? "ThisExpression" : "Super";
+    node = this.startNode();
+    this.next();
     return this.finishNode(node, type)
 
-  case tt.name:
-    var startPos = this.start, startLoc = this.startLoc
-    var id = this.parseIdent(this.type !== tt.name)
-    if (this.options.ecmaVersion >= 8 && id.name === "async" && !this.canInsertSemicolon() && this.eat(tt._function))
-      return this.parseFunction(this.startNodeAt(startPos, startLoc), false, false, true)
+  case types.name:
+    var startPos = this.start, startLoc = this.startLoc;
+    var id = this.parseIdent(this.type !== types.name);
+    if (this.options.ecmaVersion >= 8 && id.name === "async" && !this.canInsertSemicolon() && this.eat(types._function))
+      { return this.parseFunction(this.startNodeAt(startPos, startLoc), false, false, true) }
     if (canBeArrow && !this.canInsertSemicolon()) {
-      if (this.eat(tt.arrow))
-        return this.parseArrowExpression(this.startNodeAt(startPos, startLoc), [id], false)
-      if (this.options.ecmaVersion >= 8 && id.name === "async" && this.type === tt.name) {
-        id = this.parseIdent()
-        if (this.canInsertSemicolon() || !this.eat(tt.arrow))
-          this.unexpected()
+      if (this.eat(types.arrow))
+        { return this.parseArrowExpression(this.startNodeAt(startPos, startLoc), [id], false) }
+      if (this.options.ecmaVersion >= 8 && id.name === "async" && this.type === types.name) {
+        id = this.parseIdent();
+        if (this.canInsertSemicolon() || !this.eat(types.arrow))
+          { this.unexpected(); }
         return this.parseArrowExpression(this.startNodeAt(startPos, startLoc), [id], true)
       }
     }
     return id
 
-  case tt.regexp:
-    var value = this.value
-    node = this.parseLiteral(value.value)
-    node.regex = {pattern: value.pattern, flags: value.flags}
+  case types.regexp:
+    var value = this.value;
+    node = this.parseLiteral(value.value);
+    node.regex = {pattern: value.pattern, flags: value.flags};
     return node
 
-  case tt.num: case tt.string:
+  case types.num: case types.string:
     return this.parseLiteral(this.value)
 
-  case tt._null: case tt._true: case tt._false:
-    node = this.startNode()
-    node.value = this.type === tt._null ? null : this.type === tt._true
-    node.raw = this.type.keyword
-    this.next()
+  case types._null: case types._true: case types._false:
+    node = this.startNode();
+    node.value = this.type === types._null ? null : this.type === types._true;
+    node.raw = this.type.keyword;
+    this.next();
     return this.finishNode(node, "Literal")
 
-  case tt.parenL:
-    var start = this.start, expr = this.parseParenAndDistinguishExpression(canBeArrow)
+  case types.parenL:
+    var start = this.start, expr = this.parseParenAndDistinguishExpression(canBeArrow);
     if (refDestructuringErrors) {
       if (refDestructuringErrors.parenthesizedAssign < 0 && !this.isSimpleAssignTarget(expr))
-        refDestructuringErrors.parenthesizedAssign = start
+        { refDestructuringErrors.parenthesizedAssign = start; }
       if (refDestructuringErrors.parenthesizedBind < 0)
-        refDestructuringErrors.parenthesizedBind = start
+        { refDestructuringErrors.parenthesizedBind = start; }
     }
     return expr
 
-  case tt.bracketL:
-    node = this.startNode()
-    this.next()
-    node.elements = this.parseExprList(tt.bracketR, true, true, refDestructuringErrors)
+  case types.bracketL:
+    node = this.startNode();
+    this.next();
+    node.elements = this.parseExprList(types.bracketR, true, true, refDestructuringErrors);
     return this.finishNode(node, "ArrayExpression")
 
-  case tt.braceL:
+  case types.braceL:
     return this.parseObj(false, refDestructuringErrors)
 
-  case tt._function:
-    node = this.startNode()
-    this.next()
+  case types._function:
+    node = this.startNode();
+    this.next();
     return this.parseFunction(node, false)
 
-  case tt._class:
+  case types._class:
     return this.parseClass(this.startNode(), false)
 
-  case tt._new:
+  case types._new:
     return this.parseNew()
 
-  case tt.backQuote:
+  case types.backQuote:
     return this.parseTemplate()
 
   default:
-    this.unexpected()
+    this.unexpected();
   }
-}
+};
 
 pp$3.parseLiteral = function(value) {
-  var node = this.startNode()
-  node.value = value
-  node.raw = this.input.slice(this.start, this.end)
-  this.next()
+  var node = this.startNode();
+  node.value = value;
+  node.raw = this.input.slice(this.start, this.end);
+  this.next();
   return this.finishNode(node, "Literal")
-}
+};
 
 pp$3.parseParenExpression = function() {
-  this.expect(tt.parenL)
-  var val = this.parseExpression()
-  this.expect(tt.parenR)
+  this.expect(types.parenL);
+  var val = this.parseExpression();
+  this.expect(types.parenR);
   return val
-}
+};
 
 pp$3.parseParenAndDistinguishExpression = function(canBeArrow) {
   var this$1 = this;
 
-  var startPos = this.start, startLoc = this.startLoc, val, allowTrailingComma = this.options.ecmaVersion >= 8
+  var startPos = this.start, startLoc = this.startLoc, val, allowTrailingComma = this.options.ecmaVersion >= 8;
   if (this.options.ecmaVersion >= 6) {
-    this.next()
-
-    var innerStartPos = this.start, innerStartLoc = this.startLoc
-    var exprList = [], first = true, lastIsComma = false
-    var refDestructuringErrors = new DestructuringErrors, oldYieldPos = this.yieldPos, oldAwaitPos = this.awaitPos, spreadStart, innerParenStart
-    this.yieldPos = 0
-    this.awaitPos = 0
-    while (this.type !== tt.parenR) {
-      first ? first = false : this$1.expect(tt.comma)
-      if (allowTrailingComma && this$1.afterTrailingComma(tt.parenR, true)) {
-        lastIsComma = true
+    this.next();
+
+    var innerStartPos = this.start, innerStartLoc = this.startLoc;
+    var exprList = [], first = true, lastIsComma = false;
+    var refDestructuringErrors = new DestructuringErrors, oldYieldPos = this.yieldPos, oldAwaitPos = this.awaitPos, spreadStart, innerParenStart;
+    this.yieldPos = 0;
+    this.awaitPos = 0;
+    while (this.type !== types.parenR) {
+      first ? first = false : this$1.expect(types.comma);
+      if (allowTrailingComma && this$1.afterTrailingComma(types.parenR, true)) {
+        lastIsComma = true;
         break
-      } else if (this$1.type === tt.ellipsis) {
-        spreadStart = this$1.start
-        exprList.push(this$1.parseParenItem(this$1.parseRest()))
-        if (this$1.type === tt.comma) this$1.raise(this$1.start, "Comma is not permitted after the rest element")
+      } else if (this$1.type === types.ellipsis) {
+        spreadStart = this$1.start;
+        exprList.push(this$1.parseParenItem(this$1.parseRestBinding()));
+        if (this$1.type === types.comma) { this$1.raise(this$1.start, "Comma is not permitted after the rest element"); }
         break
       } else {
-        if (this$1.type === tt.parenL && !innerParenStart) {
-          innerParenStart = this$1.start
+        if (this$1.type === types.parenL && !innerParenStart) {
+          innerParenStart = this$1.start;
         }
-        exprList.push(this$1.parseMaybeAssign(false, refDestructuringErrors, this$1.parseParenItem))
+        exprList.push(this$1.parseMaybeAssign(false, refDestructuringErrors, this$1.parseParenItem));
       }
     }
-    var innerEndPos = this.start, innerEndLoc = this.startLoc
-    this.expect(tt.parenR)
-
-    if (canBeArrow && !this.canInsertSemicolon() && this.eat(tt.arrow)) {
-      this.checkPatternErrors(refDestructuringErrors, false)
-      this.checkYieldAwaitInDefaultParams()
-      if (innerParenStart) this.unexpected(innerParenStart)
-      this.yieldPos = oldYieldPos
-      this.awaitPos = oldAwaitPos
+    var innerEndPos = this.start, innerEndLoc = this.startLoc;
+    this.expect(types.parenR);
+
+    if (canBeArrow && !this.canInsertSemicolon() && this.eat(types.arrow)) {
+      this.checkPatternErrors(refDestructuringErrors, false);
+      this.checkYieldAwaitInDefaultParams();
+      if (innerParenStart) { this.unexpected(innerParenStart); }
+      this.yieldPos = oldYieldPos;
+      this.awaitPos = oldAwaitPos;
       return this.parseParenArrowList(startPos, startLoc, exprList)
     }
 
-    if (!exprList.length || lastIsComma) this.unexpected(this.lastTokStart)
-    if (spreadStart) this.unexpected(spreadStart)
-    this.checkExpressionErrors(refDestructuringErrors, true)
-    this.yieldPos = oldYieldPos || this.yieldPos
-    this.awaitPos = oldAwaitPos || this.awaitPos
+    if (!exprList.length || lastIsComma) { this.unexpected(this.lastTokStart); }
+    if (spreadStart) { this.unexpected(spreadStart); }
+    this.checkExpressionErrors(refDestructuringErrors, true);
+    this.yieldPos = oldYieldPos || this.yieldPos;
+    this.awaitPos = oldAwaitPos || this.awaitPos;
 
     if (exprList.length > 1) {
-      val = this.startNodeAt(innerStartPos, innerStartLoc)
-      val.expressions = exprList
-      this.finishNodeAt(val, "SequenceExpression", innerEndPos, innerEndLoc)
+      val = this.startNodeAt(innerStartPos, innerStartLoc);
+      val.expressions = exprList;
+      this.finishNodeAt(val, "SequenceExpression", innerEndPos, innerEndLoc);
     } else {
-      val = exprList[0]
+      val = exprList[0];
     }
   } else {
-    val = this.parseParenExpression()
+    val = this.parseParenExpression();
   }
 
   if (this.options.preserveParens) {
-    var par = this.startNodeAt(startPos, startLoc)
-    par.expression = val
+    var par = this.startNodeAt(startPos, startLoc);
+    par.expression = val;
     return this.finishNode(par, "ParenthesizedExpression")
   } else {
     return val
   }
-}
+};
 
 pp$3.parseParenItem = function(item) {
   return item
-}
+};
 
 pp$3.parseParenArrowList = function(startPos, startLoc, exprList) {
   return this.parseArrowExpression(this.startNodeAt(startPos, startLoc), exprList)
-}
+};
 
 // New's precedence is slightly tricky. It must allow its argument to
 // be a `[]` or dot subscript expression, but not a call — at least,
@@ -2159,282 +2185,300 @@ pp$3.parseParenArrowList = function(startPos, startLoc, exprList) {
 // argument to parseSubscripts to prevent it from consuming the
 // argument list.
 
-var empty$1 = []
+var empty$1 = [];
 
 pp$3.parseNew = function() {
-  var node = this.startNode()
-  var meta = this.parseIdent(true)
-  if (this.options.ecmaVersion >= 6 && this.eat(tt.dot)) {
-    node.meta = meta
-    node.property = this.parseIdent(true)
+  var node = this.startNode();
+  var meta = this.parseIdent(true);
+  if (this.options.ecmaVersion >= 6 && this.eat(types.dot)) {
+    node.meta = meta;
+    node.property = this.parseIdent(true);
     if (node.property.name !== "target")
-      this.raiseRecoverable(node.property.start, "The only valid meta property for new is new.target")
+      { this.raiseRecoverable(node.property.start, "The only valid meta property for new is new.target"); }
     if (!this.inFunction)
-      this.raiseRecoverable(node.start, "new.target can only be used in functions")
+      { this.raiseRecoverable(node.start, "new.target can only be used in functions"); }
     return this.finishNode(node, "MetaProperty")
   }
-  var startPos = this.start, startLoc = this.startLoc
-  node.callee = this.parseSubscripts(this.parseExprAtom(), startPos, startLoc, true)
-  if (this.eat(tt.parenL)) node.arguments = this.parseExprList(tt.parenR, this.options.ecmaVersion >= 8, false)
-  else node.arguments = empty$1
+  var startPos = this.start, startLoc = this.startLoc;
+  node.callee = this.parseSubscripts(this.parseExprAtom(), startPos, startLoc, true);
+  if (this.eat(types.parenL)) { node.arguments = this.parseExprList(types.parenR, this.options.ecmaVersion >= 8, false); }
+  else { node.arguments = empty$1; }
   return this.finishNode(node, "NewExpression")
-}
+};
 
 // Parse template expression.
 
-pp$3.parseTemplateElement = function() {
-  var elem = this.startNode()
-  elem.value = {
-    raw: this.input.slice(this.start, this.end).replace(/\r\n?/g, "\n"),
-    cooked: this.value
+pp$3.parseTemplateElement = function(ref) {
+  var isTagged = ref.isTagged;
+
+  var elem = this.startNode();
+  if (this.type === types.invalidTemplate) {
+    if (!isTagged) {
+      this.raiseRecoverable(this.start, "Bad escape sequence in untagged template literal");
+    }
+    elem.value = {
+      raw: this.value,
+      cooked: null
+    };
+  } else {
+    elem.value = {
+      raw: this.input.slice(this.start, this.end).replace(/\r\n?/g, "\n"),
+      cooked: this.value
+    };
   }
-  this.next()
-  elem.tail = this.type === tt.backQuote
+  this.next();
+  elem.tail = this.type === types.backQuote;
   return this.finishNode(elem, "TemplateElement")
-}
+};
 
-pp$3.parseTemplate = function() {
+pp$3.parseTemplate = function(ref) {
   var this$1 = this;
-
-  var node = this.startNode()
-  this.next()
-  node.expressions = []
-  var curElt = this.parseTemplateElement()
-  node.quasis = [curElt]
+  if ( ref === void 0 ) ref = {};
+  var isTagged = ref.isTagged; if ( isTagged === void 0 ) isTagged = false;
+
+  var node = this.startNode();
+  this.next();
+  node.expressions = [];
+  var curElt = this.parseTemplateElement({isTagged: isTagged});
+  node.quasis = [curElt];
   while (!curElt.tail) {
-    this$1.expect(tt.dollarBraceL)
-    node.expressions.push(this$1.parseExpression())
-    this$1.expect(tt.braceR)
-    node.quasis.push(curElt = this$1.parseTemplateElement())
+    this$1.expect(types.dollarBraceL);
+    node.expressions.push(this$1.parseExpression());
+    this$1.expect(types.braceR);
+    node.quasis.push(curElt = this$1.parseTemplateElement({isTagged: isTagged}));
   }
-  this.next()
+  this.next();
   return this.finishNode(node, "TemplateLiteral")
-}
+};
 
 // Parse an object literal or binding pattern.
 
+pp$3.isAsyncProp = function(prop) {
+  return !prop.computed && prop.key.type === "Identifier" && prop.key.name === "async" &&
+    (this.type === types.name || this.type === types.num || this.type === types.string || this.type === types.bracketL) &&
+    !lineBreak.test(this.input.slice(this.lastTokEnd, this.start))
+};
+
 pp$3.parseObj = function(isPattern, refDestructuringErrors) {
   var this$1 = this;
 
-  var node = this.startNode(), first = true, propHash = {}
-  node.properties = []
-  this.next()
-  while (!this.eat(tt.braceR)) {
+  var node = this.startNode(), first = true, propHash = {};
+  node.properties = [];
+  this.next();
+  while (!this.eat(types.braceR)) {
     if (!first) {
-      this$1.expect(tt.comma)
-      if (this$1.afterTrailingComma(tt.braceR)) break
-    } else first = false
+      this$1.expect(types.comma);
+      if (this$1.afterTrailingComma(types.braceR)) { break }
+    } else { first = false; }
 
-    var prop = this$1.startNode(), isGenerator, isAsync, startPos, startLoc
+    var prop = this$1.startNode(), isGenerator = (void 0), isAsync = (void 0), startPos = (void 0), startLoc = (void 0);
     if (this$1.options.ecmaVersion >= 6) {
-      prop.method = false
-      prop.shorthand = false
+      prop.method = false;
+      prop.shorthand = false;
       if (isPattern || refDestructuringErrors) {
-        startPos = this$1.start
-        startLoc = this$1.startLoc
+        startPos = this$1.start;
+        startLoc = this$1.startLoc;
       }
       if (!isPattern)
-        isGenerator = this$1.eat(tt.star)
+        { isGenerator = this$1.eat(types.star); }
     }
-    this$1.parsePropertyName(prop)
-    if (!isPattern && this$1.options.ecmaVersion >= 8 && !isGenerator && !prop.computed &&
-        prop.key.type === "Identifier" && prop.key.name === "async" && this$1.type !== tt.parenL &&
-        this$1.type !== tt.colon && !this$1.canInsertSemicolon()) {
-      isAsync = true
-      this$1.parsePropertyName(prop, refDestructuringErrors)
+    this$1.parsePropertyName(prop);
+    if (!isPattern && this$1.options.ecmaVersion >= 8 && !isGenerator && this$1.isAsyncProp(prop)) {
+      isAsync = true;
+      this$1.parsePropertyName(prop, refDestructuringErrors);
     } else {
-      isAsync = false
+      isAsync = false;
     }
-    this$1.parsePropertyValue(prop, isPattern, isGenerator, isAsync, startPos, startLoc, refDestructuringErrors)
-    this$1.checkPropClash(prop, propHash)
-    node.properties.push(this$1.finishNode(prop, "Property"))
+    this$1.parsePropertyValue(prop, isPattern, isGenerator, isAsync, startPos, startLoc, refDestructuringErrors);
+    this$1.checkPropClash(prop, propHash);
+    node.properties.push(this$1.finishNode(prop, "Property"));
   }
   return this.finishNode(node, isPattern ? "ObjectPattern" : "ObjectExpression")
-}
+};
 
 pp$3.parsePropertyValue = function(prop, isPattern, isGenerator, isAsync, startPos, startLoc, refDestructuringErrors) {
-  if ((isGenerator || isAsync) && this.type === tt.colon)
-    this.unexpected()
-
-  if (this.eat(tt.colon)) {
-    prop.value = isPattern ? this.parseMaybeDefault(this.start, this.startLoc) : this.parseMaybeAssign(false, refDestructuringErrors)
-    prop.kind = "init"
-  } else if (this.options.ecmaVersion >= 6 && this.type === tt.parenL) {
-    if (isPattern) this.unexpected()
-    prop.kind = "init"
-    prop.method = true
-    prop.value = this.parseMethod(isGenerator, isAsync)
+  if ((isGenerator || isAsync) && this.type === types.colon)
+    { this.unexpected(); }
+
+  if (this.eat(types.colon)) {
+    prop.value = isPattern ? this.parseMaybeDefault(this.start, this.startLoc) : this.parseMaybeAssign(false, refDestructuringErrors);
+    prop.kind = "init";
+  } else if (this.options.ecmaVersion >= 6 && this.type === types.parenL) {
+    if (isPattern) { this.unexpected(); }
+    prop.kind = "init";
+    prop.method = true;
+    prop.value = this.parseMethod(isGenerator, isAsync);
   } else if (this.options.ecmaVersion >= 5 && !prop.computed && prop.key.type === "Identifier" &&
              (prop.key.name === "get" || prop.key.name === "set") &&
-             (this.type != tt.comma && this.type != tt.braceR)) {
-    if (isGenerator || isAsync || isPattern) this.unexpected()
-    prop.kind = prop.key.name
-    this.parsePropertyName(prop)
-    prop.value = this.parseMethod(false)
-    var paramCount = prop.kind === "get" ? 0 : 1
+             (this.type != types.comma && this.type != types.braceR)) {
+    if (isGenerator || isAsync || isPattern) { this.unexpected(); }
+    prop.kind = prop.key.name;
+    this.parsePropertyName(prop);
+    prop.value = this.parseMethod(false);
+    var paramCount = prop.kind === "get" ? 0 : 1;
     if (prop.value.params.length !== paramCount) {
-      var start = prop.value.start
+      var start = prop.value.start;
       if (prop.kind === "get")
-        this.raiseRecoverable(start, "getter should have no params")
+        { this.raiseRecoverable(start, "getter should have no params"); }
       else
-        this.raiseRecoverable(start, "setter should have exactly one param")
+        { this.raiseRecoverable(start, "setter should have exactly one param"); }
     } else {
       if (prop.kind === "set" && prop.value.params[0].type === "RestElement")
-        this.raiseRecoverable(prop.value.params[0].start, "Setter cannot use rest params")
+        { this.raiseRecoverable(prop.value.params[0].start, "Setter cannot use rest params"); }
     }
   } else if (this.options.ecmaVersion >= 6 && !prop.computed && prop.key.type === "Identifier") {
-    if (this.keywords.test(prop.key.name) ||
-        (this.strict ? this.reservedWordsStrict : this.reservedWords).test(prop.key.name) ||
-        (this.inGenerator && prop.key.name == "yield") ||
-        (this.inAsync && prop.key.name == "await"))
-      this.raiseRecoverable(prop.key.start, "'" + prop.key.name + "' can not be used as shorthand property")
-    prop.kind = "init"
+    this.checkUnreserved(prop.key);
+    prop.kind = "init";
     if (isPattern) {
-      prop.value = this.parseMaybeDefault(startPos, startLoc, prop.key)
-    } else if (this.type === tt.eq && refDestructuringErrors) {
+      prop.value = this.parseMaybeDefault(startPos, startLoc, prop.key);
+    } else if (this.type === types.eq && refDestructuringErrors) {
       if (refDestructuringErrors.shorthandAssign < 0)
-        refDestructuringErrors.shorthandAssign = this.start
-      prop.value = this.parseMaybeDefault(startPos, startLoc, prop.key)
+        { refDestructuringErrors.shorthandAssign = this.start; }
+      prop.value = this.parseMaybeDefault(startPos, startLoc, prop.key);
     } else {
-      prop.value = prop.key
+      prop.value = prop.key;
     }
-    prop.shorthand = true
-  } else this.unexpected()
-}
+    prop.shorthand = true;
+  } else { this.unexpected(); }
+};
 
 pp$3.parsePropertyName = function(prop) {
   if (this.options.ecmaVersion >= 6) {
-    if (this.eat(tt.bracketL)) {
-      prop.computed = true
-      prop.key = this.parseMaybeAssign()
-      this.expect(tt.bracketR)
+    if (this.eat(types.bracketL)) {
+      prop.computed = true;
+      prop.key = this.parseMaybeAssign();
+      this.expect(types.bracketR);
       return prop.key
     } else {
-      prop.computed = false
+      prop.computed = false;
     }
   }
-  return prop.key = this.type === tt.num || this.type === tt.string ? this.parseExprAtom() : this.parseIdent(true)
-}
+  return prop.key = this.type === types.num || this.type === types.string ? this.parseExprAtom() : this.parseIdent(true)
+};
 
 // Initialize empty function node.
 
 pp$3.initFunction = function(node) {
-  node.id = null
+  node.id = null;
   if (this.options.ecmaVersion >= 6) {
-    node.generator = false
-    node.expression = false
+    node.generator = false;
+    node.expression = false;
   }
   if (this.options.ecmaVersion >= 8)
-    node.async = false
-}
+    { node.async = false; }
+};
 
 // Parse object or class method.
 
 pp$3.parseMethod = function(isGenerator, isAsync) {
   var node = this.startNode(), oldInGen = this.inGenerator, oldInAsync = this.inAsync,
-      oldYieldPos = this.yieldPos, oldAwaitPos = this.awaitPos, oldInFunc = this.inFunction
+      oldYieldPos = this.yieldPos, oldAwaitPos = this.awaitPos, oldInFunc = this.inFunction;
 
-  this.initFunction(node)
+  this.initFunction(node);
   if (this.options.ecmaVersion >= 6)
-    node.generator = isGenerator
+    { node.generator = isGenerator; }
   if (this.options.ecmaVersion >= 8)
-    node.async = !!isAsync
-
-  this.inGenerator = node.generator
-  this.inAsync = node.async
-  this.yieldPos = 0
-  this.awaitPos = 0
-  this.inFunction = true
-  this.enterFunctionScope()
-
-  this.expect(tt.parenL)
-  node.params = this.parseBindingList(tt.parenR, false, this.options.ecmaVersion >= 8)
-  this.checkYieldAwaitInDefaultParams()
-  this.parseFunctionBody(node, false)
-
-  this.inGenerator = oldInGen
-  this.inAsync = oldInAsync
-  this.yieldPos = oldYieldPos
-  this.awaitPos = oldAwaitPos
-  this.inFunction = oldInFunc
+    { node.async = !!isAsync; }
+
+  this.inGenerator = node.generator;
+  this.inAsync = node.async;
+  this.yieldPos = 0;
+  this.awaitPos = 0;
+  this.inFunction = true;
+  this.enterFunctionScope();
+
+  this.expect(types.parenL);
+  node.params = this.parseBindingList(types.parenR, false, this.options.ecmaVersion >= 8);
+  this.checkYieldAwaitInDefaultParams();
+  this.parseFunctionBody(node, false);
+
+  this.inGenerator = oldInGen;
+  this.inAsync = oldInAsync;
+  this.yieldPos = oldYieldPos;
+  this.awaitPos = oldAwaitPos;
+  this.inFunction = oldInFunc;
   return this.finishNode(node, "FunctionExpression")
-}
+};
 
 // Parse arrow function expression with given parameters.
 
 pp$3.parseArrowExpression = function(node, params, isAsync) {
   var oldInGen = this.inGenerator, oldInAsync = this.inAsync,
-      oldYieldPos = this.yieldPos, oldAwaitPos = this.awaitPos, oldInFunc = this.inFunction
+      oldYieldPos = this.yieldPos, oldAwaitPos = this.awaitPos, oldInFunc = this.inFunction;
 
-  this.enterFunctionScope()
-  this.initFunction(node)
+  this.enterFunctionScope();
+  this.initFunction(node);
   if (this.options.ecmaVersion >= 8)
-    node.async = !!isAsync
-
-  this.inGenerator = false
-  this.inAsync = node.async
-  this.yieldPos = 0
-  this.awaitPos = 0
-  this.inFunction = true
-
-  node.params = this.toAssignableList(params, true)
-  this.parseFunctionBody(node, true)
-
-  this.inGenerator = oldInGen
-  this.inAsync = oldInAsync
-  this.yieldPos = oldYieldPos
-  this.awaitPos = oldAwaitPos
-  this.inFunction = oldInFunc
+    { node.async = !!isAsync; }
+
+  this.inGenerator = false;
+  this.inAsync = node.async;
+  this.yieldPos = 0;
+  this.awaitPos = 0;
+  this.inFunction = true;
+
+  node.params = this.toAssignableList(params, true);
+  this.parseFunctionBody(node, true);
+
+  this.inGenerator = oldInGen;
+  this.inAsync = oldInAsync;
+  this.yieldPos = oldYieldPos;
+  this.awaitPos = oldAwaitPos;
+  this.inFunction = oldInFunc;
   return this.finishNode(node, "ArrowFunctionExpression")
-}
+};
 
 // Parse function body and check parameters.
 
 pp$3.parseFunctionBody = function(node, isArrowFunction) {
-  var isExpression = isArrowFunction && this.type !== tt.braceL
-  var oldStrict = this.strict, useStrict = false
+  var isExpression = isArrowFunction && this.type !== types.braceL;
+  var oldStrict = this.strict, useStrict = false;
 
   if (isExpression) {
-    node.body = this.parseMaybeAssign()
-    node.expression = true
-    this.checkParams(node, false)
+    node.body = this.parseMaybeAssign();
+    node.expression = true;
+    this.checkParams(node, false);
   } else {
-    var nonSimple = this.options.ecmaVersion >= 7 && !this.isSimpleParamList(node.params)
+    var nonSimple = this.options.ecmaVersion >= 7 && !this.isSimpleParamList(node.params);
     if (!oldStrict || nonSimple) {
-      useStrict = this.strictDirective(this.end)
+      useStrict = this.strictDirective(this.end);
       // If this is a strict mode function, verify that argument names
       // are not repeated, and it does not try to bind the words `eval`
       // or `arguments`.
       if (useStrict && nonSimple)
-        this.raiseRecoverable(node.start, "Illegal 'use strict' directive in function with non-simple parameter list")
+        { this.raiseRecoverable(node.start, "Illegal 'use strict' directive in function with non-simple parameter list"); }
     }
     // Start a new scope with regard to labels and the `inFunction`
     // flag (restore them to their old value afterwards).
-    var oldLabels = this.labels
-    this.labels = []
-    if (useStrict) this.strict = true
+    var oldLabels = this.labels;
+    this.labels = [];
+    if (useStrict) { this.strict = true; }
 
     // Add the params to varDeclaredNames to ensure that an error is thrown
     // if a let/const declaration in the function clashes with one of the params.
-    this.checkParams(node, !oldStrict && !useStrict && !isArrowFunction && this.isSimpleParamList(node.params))
-    node.body = this.parseBlock(false)
-    node.expression = false
-    this.labels = oldLabels
+    this.checkParams(node, !oldStrict && !useStrict && !isArrowFunction && this.isSimpleParamList(node.params));
+    node.body = this.parseBlock(false);
+    node.expression = false;
+    this.labels = oldLabels;
   }
-  this.exitFunctionScope()
+  this.exitFunctionScope();
 
   if (this.strict && node.id) {
     // Ensure the function name isn't a forbidden identifier in strict mode, e.g. 'eval'
-    this.checkLVal(node.id, "none")
+    this.checkLVal(node.id, "none");
   }
-  this.strict = oldStrict
-}
+  this.strict = oldStrict;
+};
 
 pp$3.isSimpleParamList = function(params) {
-  for (var i = 0; i < params.length; i++)
-    if (params[i].type !== "Identifier") return false
+  for (var i = 0, list = params; i < list.length; i += 1)
+    {
+    var param = list[i];
+
+    if (param.type !== "Identifier") { return false
+  } }
   return true
-}
+};
 
 // Checks function params for various disallowed patterns such as using "eval"
 // or "arguments" and duplicate parameters.
@@ -2442,9 +2486,14 @@ pp$3.isSimpleParamList = function(params) {
 pp$3.checkParams = function(node, allowDuplicates) {
   var this$1 = this;
 
-  var nameHash = {}
-  for (var i = 0; i < node.params.length; i++) this$1.checkLVal(node.params[i], "var", allowDuplicates ? null : nameHash)
-}
+  var nameHash = {};
+  for (var i = 0, list = node.params; i < list.length; i += 1)
+    {
+    var param = list[i];
+
+    this$1.checkLVal(param, "var", allowDuplicates ? null : nameHash);
+  }
+};
 
 // Parses a comma-separated list of expressions, and returns them as
 // an array. `close` is the token type that ends the list, and
@@ -2455,81 +2504,93 @@ pp$3.checkParams = function(node, allowDuplicates) {
 pp$3.parseExprList = function(close, allowTrailingComma, allowEmpty, refDestructuringErrors) {
   var this$1 = this;
 
-  var elts = [], first = true
+  var elts = [], first = true;
   while (!this.eat(close)) {
     if (!first) {
-      this$1.expect(tt.comma)
-      if (allowTrailingComma && this$1.afterTrailingComma(close)) break
-    } else first = false
-
-    var elt
-    if (allowEmpty && this$1.type === tt.comma)
-      elt = null
-    else if (this$1.type === tt.ellipsis) {
-      elt = this$1.parseSpread(refDestructuringErrors)
-      if (refDestructuringErrors && this$1.type === tt.comma && refDestructuringErrors.trailingComma < 0)
-        refDestructuringErrors.trailingComma = this$1.start
+      this$1.expect(types.comma);
+      if (allowTrailingComma && this$1.afterTrailingComma(close)) { break }
+    } else { first = false; }
+
+    var elt = (void 0);
+    if (allowEmpty && this$1.type === types.comma)
+      { elt = null; }
+    else if (this$1.type === types.ellipsis) {
+      elt = this$1.parseSpread(refDestructuringErrors);
+      if (refDestructuringErrors && this$1.type === types.comma && refDestructuringErrors.trailingComma < 0)
+        { refDestructuringErrors.trailingComma = this$1.start; }
     } else {
-      elt = this$1.parseMaybeAssign(false, refDestructuringErrors)
+      elt = this$1.parseMaybeAssign(false, refDestructuringErrors);
     }
-    elts.push(elt)
+    elts.push(elt);
   }
   return elts
-}
+};
 
 // Parse the next token as an identifier. If `liberal` is true (used
 // when parsing properties), it will also convert keywords into
 // identifiers.
 
-pp$3.parseIdent = function(liberal) {
-  var node = this.startNode()
-  if (liberal && this.options.allowReserved == "never") liberal = false
-  if (this.type === tt.name) {
-    if (!liberal && (this.strict ? this.reservedWordsStrict : this.reservedWords).test(this.value) &&
-        (this.options.ecmaVersion >= 6 ||
-         this.input.slice(this.start, this.end).indexOf("\\") == -1))
-      this.raiseRecoverable(this.start, "The keyword '" + this.value + "' is reserved")
-    if (this.inGenerator && this.value === "yield")
-      this.raiseRecoverable(this.start, "Can not use 'yield' as identifier inside a generator")
-    if (this.inAsync && this.value === "await")
-      this.raiseRecoverable(this.start, "Can not use 'await' as identifier inside an async function")
-    node.name = this.value
-  } else if (liberal && this.type.keyword) {
-    node.name = this.type.keyword
+pp$3.checkUnreserved = function(ref) {
+  var start = ref.start;
+  var end = ref.end;
+  var name = ref.name;
+
+  if (this.inGenerator && name === "yield")
+    { this.raiseRecoverable(start, "Can not use 'yield' as identifier inside a generator"); }
+  if (this.inAsync && name === "await")
+    { this.raiseRecoverable(start, "Can not use 'await' as identifier inside an async function"); }
+  if (this.isKeyword(name))
+    { this.raise(start, ("Unexpected keyword '" + name + "'")); }
+  if (this.options.ecmaVersion < 6 &&
+    this.input.slice(start, end).indexOf("\\") != -1) { return }
+  var re = this.strict ? this.reservedWordsStrict : this.reservedWords;
+  if (re.test(name))
+    { this.raiseRecoverable(start, ("The keyword '" + name + "' is reserved")); }
+};
+
+pp$3.parseIdent = function(liberal, isBinding) {
+  var node = this.startNode();
+  if (liberal && this.options.allowReserved == "never") { liberal = false; }
+  if (this.type === types.name) {
+    node.name = this.value;
+  } else if (this.type.keyword) {
+    node.name = this.type.keyword;
   } else {
-    this.unexpected()
+    this.unexpected();
   }
-  this.next()
-  return this.finishNode(node, "Identifier")
-}
+  this.next();
+  this.finishNode(node, "Identifier");
+  if (!liberal) { this.checkUnreserved(node); }
+  return node
+};
 
 // Parses yield expression inside generator.
 
 pp$3.parseYield = function() {
-  if (!this.yieldPos) this.yieldPos = this.start
+  if (!this.yieldPos) { this.yieldPos = this.start; }
 
-  var node = this.startNode()
-  this.next()
-  if (this.type == tt.semi || this.canInsertSemicolon() || (this.type != tt.star && !this.type.startsExpr)) {
-    node.delegate = false
-    node.argument = null
+  var node = this.startNode();
+  this.next();
+  if (this.type == types.semi || this.canInsertSemicolon() || (this.type != types.star && !this.type.startsExpr)) {
+    node.delegate = false;
+    node.argument = null;
   } else {
-    node.delegate = this.eat(tt.star)
-    node.argument = this.parseMaybeAssign()
+    node.delegate = this.eat(types.star);
+    node.argument = this.parseMaybeAssign();
   }
   return this.finishNode(node, "YieldExpression")
-}
+};
 
 pp$3.parseAwait = function() {
-  if (!this.awaitPos) this.awaitPos = this.start
+  if (!this.awaitPos) { this.awaitPos = this.start; }
 
-  var node = this.startNode()
-  this.next()
-  node.argument = this.parseMaybeUnary(null, true)
+  var node = this.startNode();
+  this.next();
+  node.argument = this.parseMaybeUnary(null, true);
   return this.finishNode(node, "AwaitExpression")
-}
+};
 
-var pp$4 = Parser.prototype
+var pp$4 = Parser.prototype;
 
 // This function is used to raise exceptions on parse errors. It
 // takes an offset integer (into the current `input`) to indicate
@@ -2538,38 +2599,39 @@ var pp$4 = Parser.prototype
 // message.
 
 pp$4.raise = function(pos, message) {
-  var loc = getLineInfo(this.input, pos)
-  message += " (" + loc.line + ":" + loc.column + ")"
-  var err = new SyntaxError(message)
-  err.pos = pos; err.loc = loc; err.raisedAt = this.pos
+  var loc = getLineInfo(this.input, pos);
+  message += " (" + loc.line + ":" + loc.column + ")";
+  var err = new SyntaxError(message);
+  err.pos = pos; err.loc = loc; err.raisedAt = this.pos;
   throw err
-}
+};
 
-pp$4.raiseRecoverable = pp$4.raise
+pp$4.raiseRecoverable = pp$4.raise;
 
 pp$4.curPosition = function() {
   if (this.options.locations) {
     return new Position(this.curLine, this.pos - this.lineStart)
   }
-}
+};
 
-var pp$5 = Parser.prototype
+var pp$5 = Parser.prototype;
 
 // Object.assign polyfill
 var assign = Object.assign || function(target) {
   var sources = [], len = arguments.length - 1;
   while ( len-- > 0 ) sources[ len ] = arguments[ len + 1 ];
 
-  for (var i = 0; i < sources.length; i++) {
-    var source = sources[i]
+  for (var i = 0, list = sources; i < list.length; i += 1) {
+    var source = list[i];
+
     for (var key in source) {
       if (has(source, key)) {
-        target[key] = source[key]
+        target[key] = source[key];
       }
     }
   }
   return target
-}
+};
 
 // The functions in this module keep track of declared variables in the current scope in order to detect duplicate variable names.
 
@@ -2578,37 +2640,37 @@ pp$5.enterFunctionScope = function() {
   // lexical: a hash of lexically-declared names in the current lexical scope
   // childVar: a hash of var-declared names in all child lexical scopes of the current lexical scope (within the current function scope)
   // parentLexical: a hash of lexically-declared names in all parent lexical scopes of the current lexical scope (within the current function scope)
-  this.scopeStack.push({var: {}, lexical: {}, childVar: {}, parentLexical: {}})
-}
+  this.scopeStack.push({var: {}, lexical: {}, childVar: {}, parentLexical: {}});
+};
 
 pp$5.exitFunctionScope = function() {
-  this.scopeStack.pop()
-}
+  this.scopeStack.pop();
+};
 
 pp$5.enterLexicalScope = function() {
-  var parentScope = this.scopeStack[this.scopeStack.length - 1]
-  var childScope = {var: {}, lexical: {}, childVar: {}, parentLexical: {}}
+  var parentScope = this.scopeStack[this.scopeStack.length - 1];
+  var childScope = {var: {}, lexical: {}, childVar: {}, parentLexical: {}};
 
-  this.scopeStack.push(childScope)
-  assign(childScope.parentLexical, parentScope.lexical, parentScope.parentLexical)
-}
+  this.scopeStack.push(childScope);
+  assign(childScope.parentLexical, parentScope.lexical, parentScope.parentLexical);
+};
 
 pp$5.exitLexicalScope = function() {
-  var childScope = this.scopeStack.pop()
-  var parentScope = this.scopeStack[this.scopeStack.length - 1]
+  var childScope = this.scopeStack.pop();
+  var parentScope = this.scopeStack[this.scopeStack.length - 1];
 
-  assign(parentScope.childVar, childScope.var, childScope.childVar)
-}
+  assign(parentScope.childVar, childScope.var, childScope.childVar);
+};
 
 /**
  * A name can be declared with `var` if there are no variables with the same name declared with `let`/`const`
  * in the current lexical scope or any of the parent lexical scopes in this function.
  */
 pp$5.canDeclareVarName = function(name) {
-  var currentScope = this.scopeStack[this.scopeStack.length - 1]
+  var currentScope = this.scopeStack[this.scopeStack.length - 1];
 
   return !has(currentScope.lexical, name) && !has(currentScope.parentLexical, name)
-}
+};
 
 /**
  * A name can be declared with `let`/`const` if there are no variables with the same name declared with `let`/`const`
@@ -2616,329 +2678,337 @@ pp$5.canDeclareVarName = function(name) {
  * any child lexical scopes in this function.
  */
 pp$5.canDeclareLexicalName = function(name) {
-  var currentScope = this.scopeStack[this.scopeStack.length - 1]
+  var currentScope = this.scopeStack[this.scopeStack.length - 1];
 
   return !has(currentScope.lexical, name) && !has(currentScope.var, name) && !has(currentScope.childVar, name)
-}
+};
 
 pp$5.declareVarName = function(name) {
-  this.scopeStack[this.scopeStack.length - 1].var[name] = true
-}
+  this.scopeStack[this.scopeStack.length - 1].var[name] = true;
+};
 
 pp$5.declareLexicalName = function(name) {
-  this.scopeStack[this.scopeStack.length - 1].lexical[name] = true
-}
+  this.scopeStack[this.scopeStack.length - 1].lexical[name] = true;
+};
 
 var Node = function Node(parser, pos, loc) {
-  this.type = ""
-  this.start = pos
-  this.end = 0
+  this.type = "";
+  this.start = pos;
+  this.end = 0;
   if (parser.options.locations)
-    this.loc = new SourceLocation(parser, loc)
+    { this.loc = new SourceLocation(parser, loc); }
   if (parser.options.directSourceFile)
-    this.sourceFile = parser.options.directSourceFile
+    { this.sourceFile = parser.options.directSourceFile; }
   if (parser.options.ranges)
-    this.range = [pos, 0]
+    { this.range = [pos, 0]; }
 };
 
 // Start an AST node, attaching a start offset.
 
-var pp$6 = Parser.prototype
+var pp$6 = Parser.prototype;
 
 pp$6.startNode = function() {
   return new Node(this, this.start, this.startLoc)
-}
+};
 
 pp$6.startNodeAt = function(pos, loc) {
   return new Node(this, pos, loc)
-}
+};
 
 // Finish an AST node, adding `type` and `end` properties.
 
 function finishNodeAt(node, type, pos, loc) {
-  node.type = type
-  node.end = pos
+  node.type = type;
+  node.end = pos;
   if (this.options.locations)
-    node.loc.end = loc
+    { node.loc.end = loc; }
   if (this.options.ranges)
-    node.range[1] = pos
+    { node.range[1] = pos; }
   return node
 }
 
 pp$6.finishNode = function(node, type) {
   return finishNodeAt.call(this, node, type, this.lastTokEnd, this.lastTokEndLoc)
-}
+};
 
 // Finish node at given position
 
 pp$6.finishNodeAt = function(node, type, pos, loc) {
   return finishNodeAt.call(this, node, type, pos, loc)
-}
+};
 
 // The algorithm used to determine whether a regexp can appear at a
 // given point in the program is loosely based on sweet.js' approach.
 // See https://github.com/mozilla/sweet.js/wiki/design
 
 var TokContext = function TokContext(token, isExpr, preserveSpace, override, generator) {
-  this.token = token
-  this.isExpr = !!isExpr
-  this.preserveSpace = !!preserveSpace
-  this.override = override
-  this.generator = !!generator
+  this.token = token;
+  this.isExpr = !!isExpr;
+  this.preserveSpace = !!preserveSpace;
+  this.override = override;
+  this.generator = !!generator;
 };
 
-var types = {
+var types$1 = {
   b_stat: new TokContext("{", false),
   b_expr: new TokContext("{", true),
-  b_tmpl: new TokContext("${", true),
+  b_tmpl: new TokContext("${", false),
   p_stat: new TokContext("(", false),
   p_expr: new TokContext("(", true),
-  q_tmpl: new TokContext("`", true, true, function (p) { return p.readTmplToken(); }),
+  q_tmpl: new TokContext("`", true, true, function (p) { return p.tryReadTemplateToken(); }),
+  f_stat: new TokContext("function", false),
   f_expr: new TokContext("function", true),
   f_expr_gen: new TokContext("function", true, false, null, true),
   f_gen: new TokContext("function", false, false, null, true)
-}
+};
 
-var pp$7 = Parser.prototype
+var pp$7 = Parser.prototype;
 
 pp$7.initialContext = function() {
-  return [types.b_stat]
-}
+  return [types$1.b_stat]
+};
 
 pp$7.braceIsBlock = function(prevType) {
-  if (prevType === tt.colon) {
-    var parent = this.curContext()
-    if (parent === types.b_stat || parent === types.b_expr)
-      return !parent.isExpr
-  }
-  if (prevType === tt._return)
-    return lineBreak.test(this.input.slice(this.lastTokEnd, this.start))
-  if (prevType === tt._else || prevType === tt.semi || prevType === tt.eof || prevType === tt.parenR || prevType == tt.arrow)
-    return true
-  if (prevType == tt.braceL)
-    return this.curContext() === types.b_stat
+  var parent = this.curContext();
+  if (parent === types$1.f_expr || parent === types$1.f_stat)
+    { return true }
+  if (prevType === types.colon && (parent === types$1.b_stat || parent === types$1.b_expr))
+    { return !parent.isExpr }
+
+  // The check for `tt.name && exprAllowed` detects whether we are
+  // after a `yield` or `of` construct. See the `updateContext` for
+  // `tt.name`.
+  if (prevType === types._return || prevType == types.name && this.exprAllowed)
+    { return lineBreak.test(this.input.slice(this.lastTokEnd, this.start)) }
+  if (prevType === types._else || prevType === types.semi || prevType === types.eof || prevType === types.parenR || prevType == types.arrow)
+    { return true }
+  if (prevType == types.braceL)
+    { return parent === types$1.b_stat }
+  if (prevType == types._var || prevType == types.name)
+    { return false }
   return !this.exprAllowed
-}
+};
 
 pp$7.inGeneratorContext = function() {
   var this$1 = this;
 
-  for (var i = this.context.length - 1; i >= 0; i--)
-    if (this$1.context[i].generator) return true
+  for (var i = this.context.length - 1; i >= 1; i--) {
+    var context = this$1.context[i];
+    if (context.token === "function")
+      { return context.generator }
+  }
   return false
-}
+};
 
 pp$7.updateContext = function(prevType) {
-  var update, type = this.type
-  if (type.keyword && prevType == tt.dot)
-    this.exprAllowed = false
+  var update, type = this.type;
+  if (type.keyword && prevType == types.dot)
+    { this.exprAllowed = false; }
   else if (update = type.updateContext)
-    update.call(this, prevType)
+    { update.call(this, prevType); }
   else
-    this.exprAllowed = type.beforeExpr
-}
+    { this.exprAllowed = type.beforeExpr; }
+};
 
 // Token-specific context update code
 
-tt.parenR.updateContext = tt.braceR.updateContext = function() {
+types.parenR.updateContext = types.braceR.updateContext = function() {
   if (this.context.length == 1) {
-    this.exprAllowed = true
+    this.exprAllowed = true;
     return
   }
-  var out = this.context.pop(), cur
-  if (out === types.b_stat && (cur = this.curContext()) && cur.token === "function") {
-    this.context.pop()
-    this.exprAllowed = false
-  } else if (out === types.b_tmpl) {
-    this.exprAllowed = true
-  } else {
-    this.exprAllowed = !out.isExpr
+  var out = this.context.pop();
+  if (out === types$1.b_stat && this.curContext().token === "function") {
+    out = this.context.pop();
   }
-}
+  this.exprAllowed = !out.isExpr;
+};
 
-tt.braceL.updateContext = function(prevType) {
-  this.context.push(this.braceIsBlock(prevType) ? types.b_stat : types.b_expr)
-  this.exprAllowed = true
-}
+types.braceL.updateContext = function(prevType) {
+  this.context.push(this.braceIsBlock(prevType) ? types$1.b_stat : types$1.b_expr);
+  this.exprAllowed = true;
+};
 
-tt.dollarBraceL.updateContext = function() {
-  this.context.push(types.b_tmpl)
-  this.exprAllowed = true
-}
+types.dollarBraceL.updateContext = function() {
+  this.context.push(types$1.b_tmpl);
+  this.exprAllowed = true;
+};
 
-tt.parenL.updateContext = function(prevType) {
-  var statementParens = prevType === tt._if || prevType === tt._for || prevType === tt._with || prevType === tt._while
-  this.context.push(statementParens ? types.p_stat : types.p_expr)
-  this.exprAllowed = true
-}
+types.parenL.updateContext = function(prevType) {
+  var statementParens = prevType === types._if || prevType === types._for || prevType === types._with || prevType === types._while;
+  this.context.push(statementParens ? types$1.p_stat : types$1.p_expr);
+  this.exprAllowed = true;
+};
 
-tt.incDec.updateContext = function() {
+types.incDec.updateContext = function() {
   // tokExprAllowed stays unchanged
-}
+};
 
-tt._function.updateContext = function(prevType) {
-  if (prevType.beforeExpr && prevType !== tt.semi && prevType !== tt._else &&
-      !((prevType === tt.colon || prevType === tt.braceL) && this.curContext() === types.b_stat))
-    this.context.push(types.f_expr)
-  this.exprAllowed = false
-}
+types._function.updateContext = types._class.updateContext = function(prevType) {
+  if (prevType.beforeExpr && prevType !== types.semi && prevType !== types._else &&
+      !((prevType === types.colon || prevType === types.braceL) && this.curContext() === types$1.b_stat))
+    { this.context.push(types$1.f_expr); }
+  else
+    { this.context.push(types$1.f_stat); }
+  this.exprAllowed = false;
+};
 
-tt.backQuote.updateContext = function() {
-  if (this.curContext() === types.q_tmpl)
-    this.context.pop()
+types.backQuote.updateContext = function() {
+  if (this.curContext() === types$1.q_tmpl)
+    { this.context.pop(); }
   else
-    this.context.push(types.q_tmpl)
-  this.exprAllowed = false
-}
+    { this.context.push(types$1.q_tmpl); }
+  this.exprAllowed = false;
+};
 
-tt.star.updateContext = function(prevType) {
-  if (prevType == tt._function) {
-    if (this.curContext() === types.f_expr)
-      this.context[this.context.length - 1] = types.f_expr_gen
+types.star.updateContext = function(prevType) {
+  if (prevType == types._function) {
+    var index = this.context.length - 1;
+    if (this.context[index] === types$1.f_expr)
+      { this.context[index] = types$1.f_expr_gen; }
     else
-      this.context.push(types.f_gen)
+      { this.context[index] = types$1.f_gen; }
   }
-  this.exprAllowed = true
-}
+  this.exprAllowed = true;
+};
 
-tt.name.updateContext = function(prevType) {
-  var allowed = false
+types.name.updateContext = function(prevType) {
+  var allowed = false;
   if (this.options.ecmaVersion >= 6) {
     if (this.value == "of" && !this.exprAllowed ||
         this.value == "yield" && this.inGeneratorContext())
-      allowed = true
+      { allowed = true; }
   }
-  this.exprAllowed = allowed
-}
+  this.exprAllowed = allowed;
+};
 
 // Object type used to represent tokens. Note that normally, tokens
 // simply exist as properties on the parser object. This is only
 // used for the onToken callback and the external tokenizer.
 
 var Token = function Token(p) {
-  this.type = p.type
-  this.value = p.value
-  this.start = p.start
-  this.end = p.end
+  this.type = p.type;
+  this.value = p.value;
+  this.start = p.start;
+  this.end = p.end;
   if (p.options.locations)
-    this.loc = new SourceLocation(p, p.startLoc, p.endLoc)
+    { this.loc = new SourceLocation(p, p.startLoc, p.endLoc); }
   if (p.options.ranges)
-    this.range = [p.start, p.end]
+    { this.range = [p.start, p.end]; }
 };
 
 // ## Tokenizer
 
-var pp$8 = Parser.prototype
+var pp$8 = Parser.prototype;
 
 // Are we running under Rhino?
-var isRhino = typeof Packages == "object" && Object.prototype.toString.call(Packages) == "[object JavaPackage]"
+var isRhino = typeof Packages == "object" && Object.prototype.toString.call(Packages) == "[object JavaPackage]";
 
 // Move to the next token
 
 pp$8.next = function() {
   if (this.options.onToken)
-    this.options.onToken(new Token(this))
+    { this.options.onToken(new Token(this)); }
 
-  this.lastTokEnd = this.end
-  this.lastTokStart = this.start
-  this.lastTokEndLoc = this.endLoc
-  this.lastTokStartLoc = this.startLoc
-  this.nextToken()
-}
+  this.lastTokEnd = this.end;
+  this.lastTokStart = this.start;
+  this.lastTokEndLoc = this.endLoc;
+  this.lastTokStartLoc = this.startLoc;
+  this.nextToken();
+};
 
 pp$8.getToken = function() {
-  this.next()
+  this.next();
   return new Token(this)
-}
+};
 
 // If we're in an ES6 environment, make parsers iterable
 if (typeof Symbol !== "undefined")
-  pp$8[Symbol.iterator] = function() {
+  { pp$8[Symbol.iterator] = function() {
     var this$1 = this;
 
     return {
       next: function () {
-        var token = this$1.getToken()
+        var token = this$1.getToken();
         return {
-          done: token.type === tt.eof,
+          done: token.type === types.eof,
           value: token
         }
       }
     }
-  }
+  }; }
 
 // Toggle strict mode. Re-reads the next number or string to please
 // pedantic tests (`"use strict"; 010;` should fail).
 
 pp$8.curContext = function() {
   return this.context[this.context.length - 1]
-}
+};
 
 // Read a single token, updating the parser object's token-related
 // properties.
 
 pp$8.nextToken = function() {
-  var curContext = this.curContext()
-  if (!curContext || !curContext.preserveSpace) this.skipSpace()
+  var curContext = this.curContext();
+  if (!curContext || !curContext.preserveSpace) { this.skipSpace(); }
 
-  this.start = this.pos
-  if (this.options.locations) this.startLoc = this.curPosition()
-  if (this.pos >= this.input.length) return this.finishToken(tt.eof)
+  this.start = this.pos;
+  if (this.options.locations) { this.startLoc = this.curPosition(); }
+  if (this.pos >= this.input.length) { return this.finishToken(types.eof) }
 
-  if (curContext.override) return curContext.override(this)
-  else this.readToken(this.fullCharCodeAtPos())
-}
+  if (curContext.override) { return curContext.override(this) }
+  else { this.readToken(this.fullCharCodeAtPos()); }
+};
 
 pp$8.readToken = function(code) {
   // Identifier or keyword. '\uXXXX' sequences are allowed in
   // identifiers, so '\' also dispatches to that.
   if (isIdentifierStart(code, this.options.ecmaVersion >= 6) || code === 92 /* '\' */)
-    return this.readWord()
+    { return this.readWord() }
 
   return this.getTokenFromCode(code)
-}
+};
 
 pp$8.fullCharCodeAtPos = function() {
-  var code = this.input.charCodeAt(this.pos)
-  if (code <= 0xd7ff || code >= 0xe000) return code
-  var next = this.input.charCodeAt(this.pos + 1)
+  var code = this.input.charCodeAt(this.pos);
+  if (code <= 0xd7ff || code >= 0xe000) { return code }
+  var next = this.input.charCodeAt(this.pos + 1);
   return (code << 10) + next - 0x35fdc00
-}
+};
 
 pp$8.skipBlockComment = function() {
   var this$1 = this;
 
-  var startLoc = this.options.onComment && this.curPosition()
-  var start = this.pos, end = this.input.indexOf("*/", this.pos += 2)
-  if (end === -1) this.raise(this.pos - 2, "Unterminated comment")
-  this.pos = end + 2
+  var startLoc = this.options.onComment && this.curPosition();
+  var start = this.pos, end = this.input.indexOf("*/", this.pos += 2);
+  if (end === -1) { this.raise(this.pos - 2, "Unterminated comment"); }
+  this.pos = end + 2;
   if (this.options.locations) {
-    lineBreakG.lastIndex = start
-    var match
+    lineBreakG.lastIndex = start;
+    var match;
     while ((match = lineBreakG.exec(this.input)) && match.index < this.pos) {
-      ++this$1.curLine
-      this$1.lineStart = match.index + match[0].length
+      ++this$1.curLine;
+      this$1.lineStart = match.index + match[0].length;
     }
   }
   if (this.options.onComment)
-    this.options.onComment(true, this.input.slice(start + 2, end), start, this.pos,
-                           startLoc, this.curPosition())
-}
+    { this.options.onComment(true, this.input.slice(start + 2, end), start, this.pos,
+                           startLoc, this.curPosition()); }
+};
 
 pp$8.skipLineComment = function(startSkip) {
   var this$1 = this;
 
-  var start = this.pos
-  var startLoc = this.options.onComment && this.curPosition()
-  var ch = this.input.charCodeAt(this.pos += startSkip)
-  while (this.pos < this.input.length && ch !== 10 && ch !== 13 && ch !== 8232 && ch !== 8233) {
-    ++this$1.pos
-    ch = this$1.input.charCodeAt(this$1.pos)
+  var start = this.pos;
+  var startLoc = this.options.onComment && this.curPosition();
+  var ch = this.input.charCodeAt(this.pos += startSkip);
+  while (this.pos < this.input.length && !isNewLine(ch)) {
+    ch = this$1.input.charCodeAt(++this$1.pos);
   }
   if (this.options.onComment)
-    this.options.onComment(false, this.input.slice(start + startSkip, this.pos), start, this.pos,
-                           startLoc, this.curPosition())
-}
+    { this.options.onComment(false, this.input.slice(start + startSkip, this.pos), start, this.pos,
+                           startLoc, this.curPosition()); }
+};
 
 // Called at the start of the parse and after every token. Skips
 // whitespace and comments, and.
@@ -2947,29 +3017,29 @@ pp$8.skipSpace = function() {
   var this$1 = this;
 
   loop: while (this.pos < this.input.length) {
-    var ch = this$1.input.charCodeAt(this$1.pos)
+    var ch = this$1.input.charCodeAt(this$1.pos);
     switch (ch) {
     case 32: case 160: // ' '
-      ++this$1.pos
+      ++this$1.pos;
       break
     case 13:
       if (this$1.input.charCodeAt(this$1.pos + 1) === 10) {
-        ++this$1.pos
+        ++this$1.pos;
       }
     case 10: case 8232: case 8233:
-      ++this$1.pos
+      ++this$1.pos;
       if (this$1.options.locations) {
-        ++this$1.curLine
-        this$1.lineStart = this$1.pos
+        ++this$1.curLine;
+        this$1.lineStart = this$1.pos;
       }
       break
     case 47: // '/'
       switch (this$1.input.charCodeAt(this$1.pos + 1)) {
       case 42: // '*'
-        this$1.skipBlockComment()
+        this$1.skipBlockComment();
         break
       case 47:
-        this$1.skipLineComment(2)
+        this$1.skipLineComment(2);
         break
       default:
         break loop
@@ -2977,13 +3047,13 @@ pp$8.skipSpace = function() {
       break
     default:
       if (ch > 8 && ch < 14 || ch >= 5760 && nonASCIIwhitespace.test(String.fromCharCode(ch))) {
-        ++this$1.pos
+        ++this$1.pos;
       } else {
         break loop
       }
     }
   }
-}
+};
 
 // Called at the end of every token. Sets `end`, `val`, and
 // maintains `context` and `exprAllowed`, and skips the space after
@@ -2991,14 +3061,14 @@ pp$8.skipSpace = function() {
 // right position.
 
 pp$8.finishToken = function(type, val) {
-  this.end = this.pos
-  if (this.options.locations) this.endLoc = this.curPosition()
-  var prevType = this.type
-  this.type = type
-  this.value = val
+  this.end = this.pos;
+  if (this.options.locations) { this.endLoc = this.curPosition(); }
+  var prevType = this.type;
+  this.type = type;
+  this.value = val;
 
-  this.updateContext(prevType)
-}
+  this.updateContext(prevType);
+};
 
 // ### Token reading
 
@@ -3010,99 +3080,99 @@ pp$8.finishToken = function(type, val) {
 // All in the name of speed.
 //
 pp$8.readToken_dot = function() {
-  var next = this.input.charCodeAt(this.pos + 1)
-  if (next >= 48 && next <= 57) return this.readNumber(true)
-  var next2 = this.input.charCodeAt(this.pos + 2)
+  var next = this.input.charCodeAt(this.pos + 1);
+  if (next >= 48 && next <= 57) { return this.readNumber(true) }
+  var next2 = this.input.charCodeAt(this.pos + 2);
   if (this.options.ecmaVersion >= 6 && next === 46 && next2 === 46) { // 46 = dot '.'
-    this.pos += 3
-    return this.finishToken(tt.ellipsis)
+    this.pos += 3;
+    return this.finishToken(types.ellipsis)
   } else {
-    ++this.pos
-    return this.finishToken(tt.dot)
+    ++this.pos;
+    return this.finishToken(types.dot)
   }
-}
+};
 
 pp$8.readToken_slash = function() { // '/'
-  var next = this.input.charCodeAt(this.pos + 1)
+  var next = this.input.charCodeAt(this.pos + 1);
   if (this.exprAllowed) { ++this.pos; return this.readRegexp() }
-  if (next === 61) return this.finishOp(tt.assign, 2)
-  return this.finishOp(tt.slash, 1)
-}
+  if (next === 61) { return this.finishOp(types.assign, 2) }
+  return this.finishOp(types.slash, 1)
+};
 
 pp$8.readToken_mult_modulo_exp = function(code) { // '%*'
-  var next = this.input.charCodeAt(this.pos + 1)
-  var size = 1
-  var tokentype = code === 42 ? tt.star : tt.modulo
+  var next = this.input.charCodeAt(this.pos + 1);
+  var size = 1;
+  var tokentype = code === 42 ? types.star : types.modulo;
 
   // exponentiation operator ** and **=
   if (this.options.ecmaVersion >= 7 && next === 42) {
-    ++size
-    tokentype = tt.starstar
-    next = this.input.charCodeAt(this.pos + 2)
+    ++size;
+    tokentype = types.starstar;
+    next = this.input.charCodeAt(this.pos + 2);
   }
 
-  if (next === 61) return this.finishOp(tt.assign, size + 1)
+  if (next === 61) { return this.finishOp(types.assign, size + 1) }
   return this.finishOp(tokentype, size)
-}
+};
 
 pp$8.readToken_pipe_amp = function(code) { // '|&'
-  var next = this.input.charCodeAt(this.pos + 1)
-  if (next === code) return this.finishOp(code === 124 ? tt.logicalOR : tt.logicalAND, 2)
-  if (next === 61) return this.finishOp(tt.assign, 2)
-  return this.finishOp(code === 124 ? tt.bitwiseOR : tt.bitwiseAND, 1)
-}
+  var next = this.input.charCodeAt(this.pos + 1);
+  if (next === code) { return this.finishOp(code === 124 ? types.logicalOR : types.logicalAND, 2) }
+  if (next === 61) { return this.finishOp(types.assign, 2) }
+  return this.finishOp(code === 124 ? types.bitwiseOR : types.bitwiseAND, 1)
+};
 
 pp$8.readToken_caret = function() { // '^'
-  var next = this.input.charCodeAt(this.pos + 1)
-  if (next === 61) return this.finishOp(tt.assign, 2)
-  return this.finishOp(tt.bitwiseXOR, 1)
-}
+  var next = this.input.charCodeAt(this.pos + 1);
+  if (next === 61) { return this.finishOp(types.assign, 2) }
+  return this.finishOp(types.bitwiseXOR, 1)
+};
 
 pp$8.readToken_plus_min = function(code) { // '+-'
-  var next = this.input.charCodeAt(this.pos + 1)
+  var next = this.input.charCodeAt(this.pos + 1);
   if (next === code) {
     if (next == 45 && this.input.charCodeAt(this.pos + 2) == 62 &&
-        lineBreak.test(this.input.slice(this.lastTokEnd, this.pos))) {
+        (this.lastTokEnd === 0 || lineBreak.test(this.input.slice(this.lastTokEnd, this.pos)))) {
       // A `-->` line comment
-      this.skipLineComment(3)
-      this.skipSpace()
+      this.skipLineComment(3);
+      this.skipSpace();
       return this.nextToken()
     }
-    return this.finishOp(tt.incDec, 2)
+    return this.finishOp(types.incDec, 2)
   }
-  if (next === 61) return this.finishOp(tt.assign, 2)
-  return this.finishOp(tt.plusMin, 1)
-}
+  if (next === 61) { return this.finishOp(types.assign, 2) }
+  return this.finishOp(types.plusMin, 1)
+};
 
 pp$8.readToken_lt_gt = function(code) { // '<>'
-  var next = this.input.charCodeAt(this.pos + 1)
-  var size = 1
+  var next = this.input.charCodeAt(this.pos + 1);
+  var size = 1;
   if (next === code) {
-    size = code === 62 && this.input.charCodeAt(this.pos + 2) === 62 ? 3 : 2
-    if (this.input.charCodeAt(this.pos + size) === 61) return this.finishOp(tt.assign, size + 1)
-    return this.finishOp(tt.bitShift, size)
+    size = code === 62 && this.input.charCodeAt(this.pos + 2) === 62 ? 3 : 2;
+    if (this.input.charCodeAt(this.pos + size) === 61) { return this.finishOp(types.assign, size + 1) }
+    return this.finishOp(types.bitShift, size)
   }
   if (next == 33 && code == 60 && this.input.charCodeAt(this.pos + 2) == 45 &&
       this.input.charCodeAt(this.pos + 3) == 45) {
-    if (this.inModule) this.unexpected()
+    if (this.inModule) { this.unexpected(); }
     // `<!--`, an XML-style comment that should be interpreted as a line comment
-    this.skipLineComment(4)
-    this.skipSpace()
+    this.skipLineComment(4);
+    this.skipSpace();
     return this.nextToken()
   }
-  if (next === 61) size = 2
-  return this.finishOp(tt.relational, size)
-}
+  if (next === 61) { size = 2; }
+  return this.finishOp(types.relational, size)
+};
 
 pp$8.readToken_eq_excl = function(code) { // '=!'
-  var next = this.input.charCodeAt(this.pos + 1)
-  if (next === 61) return this.finishOp(tt.equality, this.input.charCodeAt(this.pos + 2) === 61 ? 3 : 2)
+  var next = this.input.charCodeAt(this.pos + 1);
+  if (next === 61) { return this.finishOp(types.equality, this.input.charCodeAt(this.pos + 2) === 61 ? 3 : 2) }
   if (code === 61 && next === 62 && this.options.ecmaVersion >= 6) { // '=>'
-    this.pos += 2
-    return this.finishToken(tt.arrow)
+    this.pos += 2;
+    return this.finishToken(types.arrow)
   }
-  return this.finishOp(code === 61 ? tt.eq : tt.prefix, 1)
-}
+  return this.finishOp(code === 61 ? types.eq : types.prefix, 1)
+};
 
 pp$8.getTokenFromCode = function(code) {
   switch (code) {
@@ -3112,28 +3182,28 @@ pp$8.getTokenFromCode = function(code) {
     return this.readToken_dot()
 
     // Punctuation tokens.
-  case 40: ++this.pos; return this.finishToken(tt.parenL)
-  case 41: ++this.pos; return this.finishToken(tt.parenR)
-  case 59: ++this.pos; return this.finishToken(tt.semi)
-  case 44: ++this.pos; return this.finishToken(tt.comma)
-  case 91: ++this.pos; return this.finishToken(tt.bracketL)
-  case 93: ++this.pos; return this.finishToken(tt.bracketR)
-  case 123: ++this.pos; return this.finishToken(tt.braceL)
-  case 125: ++this.pos; return this.finishToken(tt.braceR)
-  case 58: ++this.pos; return this.finishToken(tt.colon)
-  case 63: ++this.pos; return this.finishToken(tt.question)
+  case 40: ++this.pos; return this.finishToken(types.parenL)
+  case 41: ++this.pos; return this.finishToken(types.parenR)
+  case 59: ++this.pos; return this.finishToken(types.semi)
+  case 44: ++this.pos; return this.finishToken(types.comma)
+  case 91: ++this.pos; return this.finishToken(types.bracketL)
+  case 93: ++this.pos; return this.finishToken(types.bracketR)
+  case 123: ++this.pos; return this.finishToken(types.braceL)
+  case 125: ++this.pos; return this.finishToken(types.braceR)
+  case 58: ++this.pos; return this.finishToken(types.colon)
+  case 63: ++this.pos; return this.finishToken(types.question)
 
   case 96: // '`'
-    if (this.options.ecmaVersion < 6) break
-    ++this.pos
-    return this.finishToken(tt.backQuote)
+    if (this.options.ecmaVersion < 6) { break }
+    ++this.pos;
+    return this.finishToken(types.backQuote)
 
   case 48: // '0'
-    var next = this.input.charCodeAt(this.pos + 1)
-    if (next === 120 || next === 88) return this.readRadixNumber(16) // '0x', '0X' - hex number
+    var next = this.input.charCodeAt(this.pos + 1);
+    if (next === 120 || next === 88) { return this.readRadixNumber(16) } // '0x', '0X' - hex number
     if (this.options.ecmaVersion >= 6) {
-      if (next === 111 || next === 79) return this.readRadixNumber(8) // '0o', '0O' - octal number
-      if (next === 98 || next === 66) return this.readRadixNumber(2) // '0b', '0B' - binary number
+      if (next === 111 || next === 79) { return this.readRadixNumber(8) } // '0o', '0O' - octal number
+      if (next === 98 || next === 66) { return this.readRadixNumber(2) } // '0b', '0B' - binary number
     }
     // Anything else beginning with a digit is an integer, octal
     // number, or float.
@@ -3171,17 +3241,17 @@ pp$8.getTokenFromCode = function(code) {
     return this.readToken_eq_excl(code)
 
   case 126: // '~'
-    return this.finishOp(tt.prefix, 1)
+    return this.finishOp(types.prefix, 1)
   }
 
-  this.raise(this.pos, "Unexpected character '" + codePointToString(code) + "'")
-}
+  this.raise(this.pos, "Unexpected character '" + codePointToString(code) + "'");
+};
 
 pp$8.finishOp = function(type, size) {
-  var str = this.input.slice(this.pos, this.pos + size)
-  this.pos += size
+  var str = this.input.slice(this.pos, this.pos + size);
+  this.pos += size;
   return this.finishToken(type, str)
-}
+};
 
 // Parse a regular expression. Some context-awareness is necessary,
 // since a '/' inside a '[]' set does not end the expression.
@@ -3191,43 +3261,43 @@ function tryCreateRegexp(src, flags, throwErrorAt, parser) {
     return new RegExp(src, flags)
   } catch (e) {
     if (throwErrorAt !== undefined) {
-      if (e instanceof SyntaxError) parser.raise(throwErrorAt, "Error parsing regular expression: " + e.message)
+      if (e instanceof SyntaxError) { parser.raise(throwErrorAt, "Error parsing regular expression: " + e.message); }
       throw e
     }
   }
 }
 
-var regexpUnicodeSupport = !!tryCreateRegexp("\uffff", "u")
+var regexpUnicodeSupport = !!tryCreateRegexp("\uffff", "u");
 
 pp$8.readRegexp = function() {
   var this$1 = this;
 
-  var escaped, inClass, start = this.pos
+  var escaped, inClass, start = this.pos;
   for (;;) {
-    if (this$1.pos >= this$1.input.length) this$1.raise(start, "Unterminated regular expression")
-    var ch = this$1.input.charAt(this$1.pos)
-    if (lineBreak.test(ch)) this$1.raise(start, "Unterminated regular expression")
+    if (this$1.pos >= this$1.input.length) { this$1.raise(start, "Unterminated regular expression"); }
+    var ch = this$1.input.charAt(this$1.pos);
+    if (lineBreak.test(ch)) { this$1.raise(start, "Unterminated regular expression"); }
     if (!escaped) {
-      if (ch === "[") inClass = true
-      else if (ch === "]" && inClass) inClass = false
-      else if (ch === "/" && !inClass) break
-      escaped = ch === "\\"
-    } else escaped = false
-    ++this$1.pos
-  }
-  var content = this.input.slice(start, this.pos)
-  ++this.pos
+      if (ch === "[") { inClass = true; }
+      else if (ch === "]" && inClass) { inClass = false; }
+      else if (ch === "/" && !inClass) { break }
+      escaped = ch === "\\";
+    } else { escaped = false; }
+    ++this$1.pos;
+  }
+  var content = this.input.slice(start, this.pos);
+  ++this.pos;
   // Need to use `readWord1` because '\uXXXX' sequences are allowed
   // here (don't ask).
-  var mods = this.readWord1()
-  var tmp = content, tmpFlags = ""
+  var mods = this.readWord1();
+  var tmp = content, tmpFlags = "";
   if (mods) {
-    var validFlags = /^[gim]*$/
-    if (this.options.ecmaVersion >= 6) validFlags = /^[gimuy]*$/
-    if (!validFlags.test(mods)) this.raise(start, "Invalid regular expression flag")
+    var validFlags = /^[gim]*$/;
+    if (this.options.ecmaVersion >= 6) { validFlags = /^[gimuy]*$/; }
+    if (!validFlags.test(mods)) { this.raise(start, "Invalid regular expression flag"); }
     if (mods.indexOf("u") >= 0) {
       if (regexpUnicodeSupport) {
-        tmpFlags = "u"
+        tmpFlags = "u";
       } else {
         // Replace each astral symbol and every Unicode escape sequence that
         // possibly represents an astral symbol or a paired surrogate with a
@@ -3238,27 +3308,27 @@ pp$8.readRegexp = function() {
         // perfectly valid pattern that is equivalent to `[a-b]`, but it would
         // be replaced by `[x-b]` which throws an error.
         tmp = tmp.replace(/\\u\{([0-9a-fA-F]+)\}/g, function (_match, code, offset) {
-          code = Number("0x" + code)
-          if (code > 0x10FFFF) this$1.raise(start + offset + 3, "Code point out of bounds")
+          code = Number("0x" + code);
+          if (code > 0x10FFFF) { this$1.raise(start + offset + 3, "Code point out of bounds"); }
           return "x"
-        })
-        tmp = tmp.replace(/\\u([a-fA-F0-9]{4})|[\uD800-\uDBFF][\uDC00-\uDFFF]/g, "x")
-        tmpFlags = tmpFlags.replace("u", "")
+        });
+        tmp = tmp.replace(/\\u([a-fA-F0-9]{4})|[\uD800-\uDBFF][\uDC00-\uDFFF]/g, "x");
+        tmpFlags = tmpFlags.replace("u", "");
       }
     }
   }
   // Detect invalid regular expressions.
-  var value = null
+  var value = null;
   // Rhino's regular expression parser is flaky and throws uncatchable exceptions,
   // so don't do detection if we are running under Rhino
   if (!isRhino) {
-    tryCreateRegexp(tmp, tmpFlags, start, this)
+    tryCreateRegexp(tmp, tmpFlags, start, this);
     // Get a regular expression object for this pattern-flag pair, or `null` in
     // case the current environment doesn't support the flags it uses.
-    value = tryCreateRegexp(content, mods)
+    value = tryCreateRegexp(content, mods);
   }
-  return this.finishToken(tt.regexp, {pattern: content, flags: mods, value: value})
-}
+  return this.finishToken(types.regexp, {pattern: content, flags: mods, value: value})
+};
 
 // Read an integer in the given radix. Return null if zero digits
 // were read, the integer value otherwise. When `len` is given, this
@@ -3267,159 +3337,210 @@ pp$8.readRegexp = function() {
 pp$8.readInt = function(radix, len) {
   var this$1 = this;
 
-  var start = this.pos, total = 0
+  var start = this.pos, total = 0;
   for (var i = 0, e = len == null ? Infinity : len; i < e; ++i) {
-    var code = this$1.input.charCodeAt(this$1.pos), val
-    if (code >= 97) val = code - 97 + 10 // a
-    else if (code >= 65) val = code - 65 + 10 // A
-    else if (code >= 48 && code <= 57) val = code - 48 // 0-9
-    else val = Infinity
-    if (val >= radix) break
-    ++this$1.pos
-    total = total * radix + val
+    var code = this$1.input.charCodeAt(this$1.pos), val = (void 0);
+    if (code >= 97) { val = code - 97 + 10; } // a
+    else if (code >= 65) { val = code - 65 + 10; } // A
+    else if (code >= 48 && code <= 57) { val = code - 48; } // 0-9
+    else { val = Infinity; }
+    if (val >= radix) { break }
+    ++this$1.pos;
+    total = total * radix + val;
   }
-  if (this.pos === start || len != null && this.pos - start !== len) return null
+  if (this.pos === start || len != null && this.pos - start !== len) { return null }
 
   return total
-}
+};
 
 pp$8.readRadixNumber = function(radix) {
-  this.pos += 2 // 0x
-  var val = this.readInt(radix)
-  if (val == null) this.raise(this.start + 2, "Expected number in radix " + radix)
-  if (isIdentifierStart(this.fullCharCodeAtPos())) this.raise(this.pos, "Identifier directly after number")
-  return this.finishToken(tt.num, val)
-}
+  this.pos += 2; // 0x
+  var val = this.readInt(radix);
+  if (val == null) { this.raise(this.start + 2, "Expected number in radix " + radix); }
+  if (isIdentifierStart(this.fullCharCodeAtPos())) { this.raise(this.pos, "Identifier directly after number"); }
+  return this.finishToken(types.num, val)
+};
 
 // Read an integer, octal integer, or floating-point number.
 
 pp$8.readNumber = function(startsWithDot) {
-  var start = this.pos, isFloat = false, octal = this.input.charCodeAt(this.pos) === 48
-  if (!startsWithDot && this.readInt(10) === null) this.raise(start, "Invalid number")
-  if (octal && this.pos == start + 1) octal = false
-  var next = this.input.charCodeAt(this.pos)
+  var start = this.pos, isFloat = false, octal = this.input.charCodeAt(this.pos) === 48;
+  if (!startsWithDot && this.readInt(10) === null) { this.raise(start, "Invalid number"); }
+  if (octal && this.pos == start + 1) { octal = false; }
+  var next = this.input.charCodeAt(this.pos);
   if (next === 46 && !octal) { // '.'
-    ++this.pos
-    this.readInt(10)
-    isFloat = true
-    next = this.input.charCodeAt(this.pos)
+    ++this.pos;
+    this.readInt(10);
+    isFloat = true;
+    next = this.input.charCodeAt(this.pos);
   }
   if ((next === 69 || next === 101) && !octal) { // 'eE'
-    next = this.input.charCodeAt(++this.pos)
-    if (next === 43 || next === 45) ++this.pos // '+-'
-    if (this.readInt(10) === null) this.raise(start, "Invalid number")
-    isFloat = true
-  }
-  if (isIdentifierStart(this.fullCharCodeAtPos())) this.raise(this.pos, "Identifier directly after number")
-
-  var str = this.input.slice(start, this.pos), val
-  if (isFloat) val = parseFloat(str)
-  else if (!octal || str.length === 1) val = parseInt(str, 10)
-  else if (/[89]/.test(str) || this.strict) this.raise(start, "Invalid number")
-  else val = parseInt(str, 8)
-  return this.finishToken(tt.num, val)
-}
+    next = this.input.charCodeAt(++this.pos);
+    if (next === 43 || next === 45) { ++this.pos; } // '+-'
+    if (this.readInt(10) === null) { this.raise(start, "Invalid number"); }
+    isFloat = true;
+  }
+  if (isIdentifierStart(this.fullCharCodeAtPos())) { this.raise(this.pos, "Identifier directly after number"); }
+
+  var str = this.input.slice(start, this.pos), val;
+  if (isFloat) { val = parseFloat(str); }
+  else if (!octal || str.length === 1) { val = parseInt(str, 10); }
+  else if (this.strict) { this.raise(start, "Invalid number"); }
+  else if (/[89]/.test(str)) { val = parseInt(str, 10); }
+  else { val = parseInt(str, 8); }
+  return this.finishToken(types.num, val)
+};
 
 // Read a string value, interpreting backslash-escapes.
 
 pp$8.readCodePoint = function() {
-  var ch = this.input.charCodeAt(this.pos), code
-
-  if (ch === 123) {
-    if (this.options.ecmaVersion < 6) this.unexpected()
-    var codePos = ++this.pos
-    code = this.readHexChar(this.input.indexOf("}", this.pos) - this.pos)
-    ++this.pos
-    if (code > 0x10FFFF) this.raise(codePos, "Code point out of bounds")
+  var ch = this.input.charCodeAt(this.pos), code;
+
+  if (ch === 123) { // '{'
+    if (this.options.ecmaVersion < 6) { this.unexpected(); }
+    var codePos = ++this.pos;
+    code = this.readHexChar(this.input.indexOf("}", this.pos) - this.pos);
+    ++this.pos;
+    if (code > 0x10FFFF) { this.invalidStringToken(codePos, "Code point out of bounds"); }
   } else {
-    code = this.readHexChar(4)
+    code = this.readHexChar(4);
   }
   return code
-}
+};
 
 function codePointToString(code) {
   // UTF-16 Decoding
-  if (code <= 0xFFFF) return String.fromCharCode(code)
-  code -= 0x10000
+  if (code <= 0xFFFF) { return String.fromCharCode(code) }
+  code -= 0x10000;
   return String.fromCharCode((code >> 10) + 0xD800, (code & 1023) + 0xDC00)
 }
 
 pp$8.readString = function(quote) {
   var this$1 = this;
 
-  var out = "", chunkStart = ++this.pos
+  var out = "", chunkStart = ++this.pos;
   for (;;) {
-    if (this$1.pos >= this$1.input.length) this$1.raise(this$1.start, "Unterminated string constant")
-    var ch = this$1.input.charCodeAt(this$1.pos)
-    if (ch === quote) break
+    if (this$1.pos >= this$1.input.length) { this$1.raise(this$1.start, "Unterminated string constant"); }
+    var ch = this$1.input.charCodeAt(this$1.pos);
+    if (ch === quote) { break }
     if (ch === 92) { // '\'
-      out += this$1.input.slice(chunkStart, this$1.pos)
-      out += this$1.readEscapedChar(false)
-      chunkStart = this$1.pos
+      out += this$1.input.slice(chunkStart, this$1.pos);
+      out += this$1.readEscapedChar(false);
+      chunkStart = this$1.pos;
     } else {
-      if (isNewLine(ch)) this$1.raise(this$1.start, "Unterminated string constant")
-      ++this$1.pos
+      if (isNewLine(ch)) { this$1.raise(this$1.start, "Unterminated string constant"); }
+      ++this$1.pos;
     }
   }
-  out += this.input.slice(chunkStart, this.pos++)
-  return this.finishToken(tt.string, out)
-}
+  out += this.input.slice(chunkStart, this.pos++);
+  return this.finishToken(types.string, out)
+};
 
 // Reads template string tokens.
 
+var INVALID_TEMPLATE_ESCAPE_ERROR = {};
+
+pp$8.tryReadTemplateToken = function() {
+  this.inTemplateElement = true;
+  try {
+    this.readTmplToken();
+  } catch (err) {
+    if (err === INVALID_TEMPLATE_ESCAPE_ERROR) {
+      this.readInvalidTemplateToken();
+    } else {
+      throw err
+    }
+  }
+
+  this.inTemplateElement = false;
+};
+
+pp$8.invalidStringToken = function(position, message) {
+  if (this.inTemplateElement && this.options.ecmaVersion >= 9) {
+    throw INVALID_TEMPLATE_ESCAPE_ERROR
+  } else {
+    this.raise(position, message);
+  }
+};
+
 pp$8.readTmplToken = function() {
   var this$1 = this;
 
-  var out = "", chunkStart = this.pos
+  var out = "", chunkStart = this.pos;
   for (;;) {
-    if (this$1.pos >= this$1.input.length) this$1.raise(this$1.start, "Unterminated template")
-    var ch = this$1.input.charCodeAt(this$1.pos)
+    if (this$1.pos >= this$1.input.length) { this$1.raise(this$1.start, "Unterminated template"); }
+    var ch = this$1.input.charCodeAt(this$1.pos);
     if (ch === 96 || ch === 36 && this$1.input.charCodeAt(this$1.pos + 1) === 123) { // '`', '${'
-      if (this$1.pos === this$1.start && this$1.type === tt.template) {
+      if (this$1.pos === this$1.start && (this$1.type === types.template || this$1.type === types.invalidTemplate)) {
         if (ch === 36) {
-          this$1.pos += 2
-          return this$1.finishToken(tt.dollarBraceL)
+          this$1.pos += 2;
+          return this$1.finishToken(types.dollarBraceL)
         } else {
-          ++this$1.pos
-          return this$1.finishToken(tt.backQuote)
+          ++this$1.pos;
+          return this$1.finishToken(types.backQuote)
         }
       }
-      out += this$1.input.slice(chunkStart, this$1.pos)
-      return this$1.finishToken(tt.template, out)
+      out += this$1.input.slice(chunkStart, this$1.pos);
+      return this$1.finishToken(types.template, out)
     }
     if (ch === 92) { // '\'
-      out += this$1.input.slice(chunkStart, this$1.pos)
-      out += this$1.readEscapedChar(true)
-      chunkStart = this$1.pos
+      out += this$1.input.slice(chunkStart, this$1.pos);
+      out += this$1.readEscapedChar(true);
+      chunkStart = this$1.pos;
     } else if (isNewLine(ch)) {
-      out += this$1.input.slice(chunkStart, this$1.pos)
-      ++this$1.pos
+      out += this$1.input.slice(chunkStart, this$1.pos);
+      ++this$1.pos;
       switch (ch) {
       case 13:
-        if (this$1.input.charCodeAt(this$1.pos) === 10) ++this$1.pos
+        if (this$1.input.charCodeAt(this$1.pos) === 10) { ++this$1.pos; }
       case 10:
-        out += "\n"
+        out += "\n";
         break
       default:
-        out += String.fromCharCode(ch)
+        out += String.fromCharCode(ch);
         break
       }
       if (this$1.options.locations) {
-        ++this$1.curLine
-        this$1.lineStart = this$1.pos
+        ++this$1.curLine;
+        this$1.lineStart = this$1.pos;
       }
-      chunkStart = this$1.pos
+      chunkStart = this$1.pos;
     } else {
-      ++this$1.pos
+      ++this$1.pos;
     }
   }
-}
+};
+
+// Reads a template token to search for the end, without validating any escape sequences
+pp$8.readInvalidTemplateToken = function() {
+  var this$1 = this;
+
+  for (; this.pos < this.input.length; this.pos++) {
+    switch (this$1.input[this$1.pos]) {
+    case "\\":
+      ++this$1.pos;
+      break
+
+    case "$":
+      if (this$1.input[this$1.pos + 1] !== "{") {
+        break
+      }
+    // falls through
+
+    case "`":
+      return this$1.finishToken(types.invalidTemplate, this$1.input.slice(this$1.start, this$1.pos))
+
+    // no default
+    }
+  }
+  this.raise(this.start, "Unterminated template");
+};
 
 // Used to read escaped characters
 
 pp$8.readEscapedChar = function(inTemplate) {
-  var ch = this.input.charCodeAt(++this.pos)
-  ++this.pos
+  var ch = this.input.charCodeAt(++this.pos);
+  ++this.pos;
   switch (ch) {
   case 110: return "\n" // 'n' -> '\n'
   case 114: return "\r" // 'r' -> '\r'
@@ -3429,36 +3550,36 @@ pp$8.readEscapedChar = function(inTemplate) {
   case 98: return "\b" // 'b' -> '\b'
   case 118: return "\u000b" // 'v' -> '\u000b'
   case 102: return "\f" // 'f' -> '\f'
-  case 13: if (this.input.charCodeAt(this.pos) === 10) ++this.pos // '\r\n'
+  case 13: if (this.input.charCodeAt(this.pos) === 10) { ++this.pos; } // '\r\n'
   case 10: // ' \n'
-    if (this.options.locations) { this.lineStart = this.pos; ++this.curLine }
+    if (this.options.locations) { this.lineStart = this.pos; ++this.curLine; }
     return ""
   default:
     if (ch >= 48 && ch <= 55) {
-      var octalStr = this.input.substr(this.pos - 1, 3).match(/^[0-7]+/)[0]
-      var octal = parseInt(octalStr, 8)
+      var octalStr = this.input.substr(this.pos - 1, 3).match(/^[0-7]+/)[0];
+      var octal = parseInt(octalStr, 8);
       if (octal > 255) {
-        octalStr = octalStr.slice(0, -1)
-        octal = parseInt(octalStr, 8)
+        octalStr = octalStr.slice(0, -1);
+        octal = parseInt(octalStr, 8);
       }
       if (octalStr !== "0" && (this.strict || inTemplate)) {
-        this.raise(this.pos - 2, "Octal literal in strict mode")
+        this.invalidStringToken(this.pos - 2, "Octal literal in strict mode");
       }
-      this.pos += octalStr.length - 1
+      this.pos += octalStr.length - 1;
       return String.fromCharCode(octal)
     }
     return String.fromCharCode(ch)
   }
-}
+};
 
 // Used to read character escape sequences ('\x', '\u', '\U').
 
 pp$8.readHexChar = function(len) {
-  var codePos = this.pos
-  var n = this.readInt(16, len)
-  if (n === null) this.raise(codePos, "Bad character escape sequence")
+  var codePos = this.pos;
+  var n = this.readInt(16, len);
+  if (n === null) { this.invalidStringToken(codePos, "Bad character escape sequence"); }
   return n
-}
+};
 
 // Read an identifier, and return it as a string. Sets `this.containsEsc`
 // to whether the word contained a '\u' escape.
@@ -3469,45 +3590,45 @@ pp$8.readHexChar = function(len) {
 pp$8.readWord1 = function() {
   var this$1 = this;
 
-  this.containsEsc = false
-  var word = "", first = true, chunkStart = this.pos
-  var astral = this.options.ecmaVersion >= 6
+  this.containsEsc = false;
+  var word = "", first = true, chunkStart = this.pos;
+  var astral = this.options.ecmaVersion >= 6;
   while (this.pos < this.input.length) {
-    var ch = this$1.fullCharCodeAtPos()
+    var ch = this$1.fullCharCodeAtPos();
     if (isIdentifierChar(ch, astral)) {
-      this$1.pos += ch <= 0xffff ? 1 : 2
+      this$1.pos += ch <= 0xffff ? 1 : 2;
     } else if (ch === 92) { // "\"
-      this$1.containsEsc = true
-      word += this$1.input.slice(chunkStart, this$1.pos)
-      var escStart = this$1.pos
+      this$1.containsEsc = true;
+      word += this$1.input.slice(chunkStart, this$1.pos);
+      var escStart = this$1.pos;
       if (this$1.input.charCodeAt(++this$1.pos) != 117) // "u"
-        this$1.raise(this$1.pos, "Expecting Unicode escape sequence \\uXXXX")
-      ++this$1.pos
-      var esc = this$1.readCodePoint()
+        { this$1.invalidStringToken(this$1.pos, "Expecting Unicode escape sequence \\uXXXX"); }
+      ++this$1.pos;
+      var esc = this$1.readCodePoint();
       if (!(first ? isIdentifierStart : isIdentifierChar)(esc, astral))
-        this$1.raise(escStart, "Invalid Unicode escape")
-      word += codePointToString(esc)
-      chunkStart = this$1.pos
+        { this$1.invalidStringToken(escStart, "Invalid Unicode escape"); }
+      word += codePointToString(esc);
+      chunkStart = this$1.pos;
     } else {
       break
     }
-    first = false
+    first = false;
   }
   return word + this.input.slice(chunkStart, this.pos)
-}
+};
 
 // Read an identifier or keyword token. Will check for reserved
 // words when necessary.
 
 pp$8.readWord = function() {
-  var word = this.readWord1()
-  var type = tt.name
+  var word = this.readWord1();
+  var type = types.name;
   if (this.keywords.test(word)) {
-    if (this.containsEsc) this.raiseRecoverable(this.start, "Escape sequence in keyword " + word)
-    type = keywordTypes[word]
+    if (this.containsEsc) { this.raiseRecoverable(this.start, "Escape sequence in keyword " + word); }
+    type = keywords$1[word];
   }
   return this.finishToken(type, word)
-}
+};
 
 // Acorn is a tiny, fast JavaScript parser written in JavaScript.
 //
@@ -3530,7 +3651,7 @@ pp$8.readWord = function() {
 // [dammit]: acorn_loose.js
 // [walk]: util/walk.js
 
-var version = "5.0.3"
+var version = "5.1.1";
 
 // The main exported interface (under `self.acorn` when in the
 // browser) is a `parse` function that takes a code string and
@@ -3548,8 +3669,8 @@ function parse(input, options) {
 // that embed JavaScript expressions.
 
 function parseExpressionAt(input, pos, options) {
-  var p = new Parser(options, input, pos)
-  p.nextToken()
+  var p = new Parser(options, input, pos);
+  p.nextToken();
   return p.parseExpression()
 }
 
@@ -3563,11 +3684,13 @@ function tokenizer(input, options) {
 // This is a terrible kludge to support the existing, pre-ES6
 // interface where the loose parser module retroactively adds exports
 // to this module.
-// eslint-disable-line camelcase
-function addLooseExports(parse, Parser, plugins) {
-  parse_dammit = parse // eslint-disable-line camelcase
-  LooseParser = Parser
-  pluginsLoose = plugins
+var parse_dammit;
+var LooseParser;
+var pluginsLoose; // eslint-disable-line camelcase
+function addLooseExports(parse, Parser$$1, plugins$$1) {
+  parse_dammit = parse; // eslint-disable-line camelcase
+  LooseParser = Parser$$1;
+  pluginsLoose = plugins$$1;
 }
 
-export { version, parse, parseExpressionAt, tokenizer, parse_dammit, LooseParser, pluginsLoose, addLooseExports, Parser, plugins, defaultOptions, Position, SourceLocation, getLineInfo, Node, TokenType, tt as tokTypes, keywordTypes, TokContext, types as tokContexts, isIdentifierChar, isIdentifierStart, Token, isNewLine, lineBreak, lineBreakG, nonASCIIwhitespace };
-\ No newline at end of file
+export { version, parse, parseExpressionAt, tokenizer, parse_dammit, LooseParser, pluginsLoose, addLooseExports, Parser, plugins, defaultOptions, Position, SourceLocation, getLineInfo, Node, TokenType, types as tokTypes, keywords$1 as keywordTypes, TokContext, types$1 as tokContexts, isIdentifierChar, isIdentifierStart, Token, isNewLine, lineBreak, lineBreakG, nonASCIIwhitespace };
diff --git a/node_modules/acorn/dist/acorn.js b/node_modules/acorn/dist/acorn.js
index ce66e72fe..9ddd332e5 100644
--- a/node_modules/acorn/dist/acorn.js
+++ b/node_modules/acorn/dist/acorn.js
@@ -1,7 +1,7 @@
 (function (global, factory) {
-  typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports) :
-  typeof define === 'function' && define.amd ? define(['exports'], factory) :
-  (factory((global.acorn = global.acorn || {})));
+	typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports) :
+	typeof define === 'function' && define.amd ? define(['exports'], factory) :
+	(factory((global.acorn = global.acorn || {})));
 }(this, (function (exports) { 'use strict';
 
 // Reserved word lists for various dialects of the language
@@ -12,16 +12,16 @@ var reservedWords = {
   6: "enum",
   strict: "implements interface let package private protected public static yield",
   strictBind: "eval arguments"
-}
+};
 
 // And the keywords
 
-var ecma5AndLessKeywords = "break case catch continue debugger default do else finally for function if return switch throw try var while with null true false instanceof typeof void delete new in this"
+var ecma5AndLessKeywords = "break case catch continue debugger default do else finally for function if return switch throw try var while with null true false instanceof typeof void delete new in this";
 
 var keywords = {
   5: ecma5AndLessKeywords,
   6: ecma5AndLessKeywords + " const class extends export import super"
-}
+};
 
 // ## Character categories
 
@@ -31,13 +31,13 @@ var keywords = {
 // code point above 128.
 // Generated by `bin/generate-identifier-regex.js`.
 
-var nonASCIIidentifierStartChars = "\xaa\xb5\xba\xc0-\xd6\xd8-\xf6\xf8-\u02c1\u02c6-\u02d1\u02e0-\u02e4\u02ec\u02ee\u0370-\u0374\u0376\u0377\u037a-\u037d\u037f\u0386\u0388-\u038a\u038c\u038e-\u03a1\u03a3-\u03f5\u03f7-\u0481\u048a-\u052f\u0531-\u0556\u0559\u0561-\u0587\u05d0-\u05ea\u05f0-\u05f2\u0620-\u064a\u066e\u066f\u0671-\u06d3\u06d5\u06e5\u06e6\u06ee\u06ef\u06fa-\u06fc\u06ff\u0710\u0712-\u072f\u074d-\u07a5\u07b1\u07ca-\u07ea\u07f4\u07f5\u07fa\u0800-\u0815\u081a\u0824\u0828\u0840-\u0858\u08a0-\u08b4\u08b6-\u08bd\u0904-\u0939\u093d\u0950\u0958-\u0961\u0971-\u0980\u0985-\u098c\u098f\u0990\u0993-\u09a8\u09aa-\u09b0\u09b2\u09b6-\u09b9\u09bd\u09ce\u09dc\u09dd\u09df-\u09e1\u09f0\u09f1\u0a05-\u0a0a\u0a0f\u0a10\u0a13-\u0a28\u0a2a-\u0a30\u0a32\u0a33\u0a35\u0a36\u0a38\u0a39\u0a59-\u0a5c\u0a5e\u0a72-\u0a74\u0a85-\u0a8d\u0a8f-\u0a91\u0a93-\u0aa8\u0aaa-\u0ab0\u0ab2\u0ab3\u0ab5-\u0ab9\u0abd\u0ad0\u0ae0\u0ae1\u0af9\u0b05-\u0b0c\u0b0f\u0b10\u0b13-\u0b28\u0b2a-\u0b30\u0b32\u0b33\u0b35-\u0b39\u0b3d\u0b5c\u0b5d\u0b5f-\u0b61\u0b71\u0b83\u0b85-\u0b8a\u0b8e-\u0b90\u0b92-\u0b95\u0b99\u0b9a\u0b9c\u0b9e\u0b9f\u0ba3\u0ba4\u0ba8-\u0baa\u0bae-\u0bb9\u0bd0\u0c05-\u0c0c\u0c0e-\u0c10\u0c12-\u0c28\u0c2a-\u0c39\u0c3d\u0c58-\u0c5a\u0c60\u0c61\u0c80\u0c85-\u0c8c\u0c8e-\u0c90\u0c92-\u0ca8\u0caa-\u0cb3\u0cb5-\u0cb9\u0cbd\u0cde\u0ce0\u0ce1\u0cf1\u0cf2\u0d05-\u0d0c\u0d0e-\u0d10\u0d12-\u0d3a\u0d3d\u0d4e\u0d54-\u0d56\u0d5f-\u0d61\u0d7a-\u0d7f\u0d85-\u0d96\u0d9a-\u0db1\u0db3-\u0dbb\u0dbd\u0dc0-\u0dc6\u0e01-\u0e30\u0e32\u0e33\u0e40-\u0e46\u0e81\u0e82\u0e84\u0e87\u0e88\u0e8a\u0e8d\u0e94-\u0e97\u0e99-\u0e9f\u0ea1-\u0ea3\u0ea5\u0ea7\u0eaa\u0eab\u0ead-\u0eb0\u0eb2\u0eb3\u0ebd\u0ec0-\u0ec4\u0ec6\u0edc-\u0edf\u0f00\u0f40-\u0f47\u0f49-\u0f6c\u0f88-\u0f8c\u1000-\u102a\u103f\u1050-\u1055\u105a-\u105d\u1061\u1065\u1066\u106e-\u1070\u1075-\u1081\u108e\u10a0-\u10c5\u10c7\u10cd\u10d0-\u10fa\u10fc-\u1248\u124a-\u124d\u1250-\u1256\u1258\u125a-\u125d\u1260-\u1288\u128a-\u128d\u1290-\u12b0\u12b2-\u12b5\u12b8-\u12be\u12c0\u12c2-\u12c5\u12c8-\u12d6\u12d8-\u1310\u1312-\u1315\u1318-\u135a\u1380-\u138f\u13a0-\u13f5\u13f8-\u13fd\u1401-\u166c\u166f-\u167f\u1681-\u169a\u16a0-\u16ea\u16ee-\u16f8\u1700-\u170c\u170e-\u1711\u1720-\u1731\u1740-\u1751\u1760-\u176c\u176e-\u1770\u1780-\u17b3\u17d7\u17dc\u1820-\u1877\u1880-\u18a8\u18aa\u18b0-\u18f5\u1900-\u191e\u1950-\u196d\u1970-\u1974\u1980-\u19ab\u19b0-\u19c9\u1a00-\u1a16\u1a20-\u1a54\u1aa7\u1b05-\u1b33\u1b45-\u1b4b\u1b83-\u1ba0\u1bae\u1baf\u1bba-\u1be5\u1c00-\u1c23\u1c4d-\u1c4f\u1c5a-\u1c7d\u1c80-\u1c88\u1ce9-\u1cec\u1cee-\u1cf1\u1cf5\u1cf6\u1d00-\u1dbf\u1e00-\u1f15\u1f18-\u1f1d\u1f20-\u1f45\u1f48-\u1f4d\u1f50-\u1f57\u1f59\u1f5b\u1f5d\u1f5f-\u1f7d\u1f80-\u1fb4\u1fb6-\u1fbc\u1fbe\u1fc2-\u1fc4\u1fc6-\u1fcc\u1fd0-\u1fd3\u1fd6-\u1fdb\u1fe0-\u1fec\u1ff2-\u1ff4\u1ff6-\u1ffc\u2071\u207f\u2090-\u209c\u2102\u2107\u210a-\u2113\u2115\u2118-\u211d\u2124\u2126\u2128\u212a-\u2139\u213c-\u213f\u2145-\u2149\u214e\u2160-\u2188\u2c00-\u2c2e\u2c30-\u2c5e\u2c60-\u2ce4\u2ceb-\u2cee\u2cf2\u2cf3\u2d00-\u2d25\u2d27\u2d2d\u2d30-\u2d67\u2d6f\u2d80-\u2d96\u2da0-\u2da6\u2da8-\u2dae\u2db0-\u2db6\u2db8-\u2dbe\u2dc0-\u2dc6\u2dc8-\u2dce\u2dd0-\u2dd6\u2dd8-\u2dde\u3005-\u3007\u3021-\u3029\u3031-\u3035\u3038-\u303c\u3041-\u3096\u309b-\u309f\u30a1-\u30fa\u30fc-\u30ff\u3105-\u312d\u3131-\u318e\u31a0-\u31ba\u31f0-\u31ff\u3400-\u4db5\u4e00-\u9fd5\ua000-\ua48c\ua4d0-\ua4fd\ua500-\ua60c\ua610-\ua61f\ua62a\ua62b\ua640-\ua66e\ua67f-\ua69d\ua6a0-\ua6ef\ua717-\ua71f\ua722-\ua788\ua78b-\ua7ae\ua7b0-\ua7b7\ua7f7-\ua801\ua803-\ua805\ua807-\ua80a\ua80c-\ua822\ua840-\ua873\ua882-\ua8b3\ua8f2-\ua8f7\ua8fb\ua8fd\ua90a-\ua925\ua930-\ua946\ua960-\ua97c\ua984-\ua9b2\ua9cf\ua9e0-\ua9e4\ua9e6-\ua9ef\ua9fa-\ua9fe\uaa00-\uaa28\uaa40-\uaa42\uaa44-\uaa4b\uaa60-\uaa76\uaa7a\uaa7e-\uaaaf\uaab1\uaab5\uaab6\uaab9-\uaabd\uaac0\uaac2\uaadb-\uaadd\uaae0-\uaaea\uaaf2-\uaaf4\uab01-\uab06\uab09-\uab0e\uab11-\uab16\uab20-\uab26\uab28-\uab2e\uab30-\uab5a\uab5c-\uab65\uab70-\uabe2\uac00-\ud7a3\ud7b0-\ud7c6\ud7cb-\ud7fb\uf900-\ufa6d\ufa70-\ufad9\ufb00-\ufb06\ufb13-\ufb17\ufb1d\ufb1f-\ufb28\ufb2a-\ufb36\ufb38-\ufb3c\ufb3e\ufb40\ufb41\ufb43\ufb44\ufb46-\ufbb1\ufbd3-\ufd3d\ufd50-\ufd8f\ufd92-\ufdc7\ufdf0-\ufdfb\ufe70-\ufe74\ufe76-\ufefc\uff21-\uff3a\uff41-\uff5a\uff66-\uffbe\uffc2-\uffc7\uffca-\uffcf\uffd2-\uffd7\uffda-\uffdc"
-var nonASCIIidentifierChars = "\u200c\u200d\xb7\u0300-\u036f\u0387\u0483-\u0487\u0591-\u05bd\u05bf\u05c1\u05c2\u05c4\u05c5\u05c7\u0610-\u061a\u064b-\u0669\u0670\u06d6-\u06dc\u06df-\u06e4\u06e7\u06e8\u06ea-\u06ed\u06f0-\u06f9\u0711\u0730-\u074a\u07a6-\u07b0\u07c0-\u07c9\u07eb-\u07f3\u0816-\u0819\u081b-\u0823\u0825-\u0827\u0829-\u082d\u0859-\u085b\u08d4-\u08e1\u08e3-\u0903\u093a-\u093c\u093e-\u094f\u0951-\u0957\u0962\u0963\u0966-\u096f\u0981-\u0983\u09bc\u09be-\u09c4\u09c7\u09c8\u09cb-\u09cd\u09d7\u09e2\u09e3\u09e6-\u09ef\u0a01-\u0a03\u0a3c\u0a3e-\u0a42\u0a47\u0a48\u0a4b-\u0a4d\u0a51\u0a66-\u0a71\u0a75\u0a81-\u0a83\u0abc\u0abe-\u0ac5\u0ac7-\u0ac9\u0acb-\u0acd\u0ae2\u0ae3\u0ae6-\u0aef\u0b01-\u0b03\u0b3c\u0b3e-\u0b44\u0b47\u0b48\u0b4b-\u0b4d\u0b56\u0b57\u0b62\u0b63\u0b66-\u0b6f\u0b82\u0bbe-\u0bc2\u0bc6-\u0bc8\u0bca-\u0bcd\u0bd7\u0be6-\u0bef\u0c00-\u0c03\u0c3e-\u0c44\u0c46-\u0c48\u0c4a-\u0c4d\u0c55\u0c56\u0c62\u0c63\u0c66-\u0c6f\u0c81-\u0c83\u0cbc\u0cbe-\u0cc4\u0cc6-\u0cc8\u0cca-\u0ccd\u0cd5\u0cd6\u0ce2\u0ce3\u0ce6-\u0cef\u0d01-\u0d03\u0d3e-\u0d44\u0d46-\u0d48\u0d4a-\u0d4d\u0d57\u0d62\u0d63\u0d66-\u0d6f\u0d82\u0d83\u0dca\u0dcf-\u0dd4\u0dd6\u0dd8-\u0ddf\u0de6-\u0def\u0df2\u0df3\u0e31\u0e34-\u0e3a\u0e47-\u0e4e\u0e50-\u0e59\u0eb1\u0eb4-\u0eb9\u0ebb\u0ebc\u0ec8-\u0ecd\u0ed0-\u0ed9\u0f18\u0f19\u0f20-\u0f29\u0f35\u0f37\u0f39\u0f3e\u0f3f\u0f71-\u0f84\u0f86\u0f87\u0f8d-\u0f97\u0f99-\u0fbc\u0fc6\u102b-\u103e\u1040-\u1049\u1056-\u1059\u105e-\u1060\u1062-\u1064\u1067-\u106d\u1071-\u1074\u1082-\u108d\u108f-\u109d\u135d-\u135f\u1369-\u1371\u1712-\u1714\u1732-\u1734\u1752\u1753\u1772\u1773\u17b4-\u17d3\u17dd\u17e0-\u17e9\u180b-\u180d\u1810-\u1819\u18a9\u1920-\u192b\u1930-\u193b\u1946-\u194f\u19d0-\u19da\u1a17-\u1a1b\u1a55-\u1a5e\u1a60-\u1a7c\u1a7f-\u1a89\u1a90-\u1a99\u1ab0-\u1abd\u1b00-\u1b04\u1b34-\u1b44\u1b50-\u1b59\u1b6b-\u1b73\u1b80-\u1b82\u1ba1-\u1bad\u1bb0-\u1bb9\u1be6-\u1bf3\u1c24-\u1c37\u1c40-\u1c49\u1c50-\u1c59\u1cd0-\u1cd2\u1cd4-\u1ce8\u1ced\u1cf2-\u1cf4\u1cf8\u1cf9\u1dc0-\u1df5\u1dfb-\u1dff\u203f\u2040\u2054\u20d0-\u20dc\u20e1\u20e5-\u20f0\u2cef-\u2cf1\u2d7f\u2de0-\u2dff\u302a-\u302f\u3099\u309a\ua620-\ua629\ua66f\ua674-\ua67d\ua69e\ua69f\ua6f0\ua6f1\ua802\ua806\ua80b\ua823-\ua827\ua880\ua881\ua8b4-\ua8c5\ua8d0-\ua8d9\ua8e0-\ua8f1\ua900-\ua909\ua926-\ua92d\ua947-\ua953\ua980-\ua983\ua9b3-\ua9c0\ua9d0-\ua9d9\ua9e5\ua9f0-\ua9f9\uaa29-\uaa36\uaa43\uaa4c\uaa4d\uaa50-\uaa59\uaa7b-\uaa7d\uaab0\uaab2-\uaab4\uaab7\uaab8\uaabe\uaabf\uaac1\uaaeb-\uaaef\uaaf5\uaaf6\uabe3-\uabea\uabec\uabed\uabf0-\uabf9\ufb1e\ufe00-\ufe0f\ufe20-\ufe2f\ufe33\ufe34\ufe4d-\ufe4f\uff10-\uff19\uff3f"
+var nonASCIIidentifierStartChars = "\xaa\xb5\xba\xc0-\xd6\xd8-\xf6\xf8-\u02c1\u02c6-\u02d1\u02e0-\u02e4\u02ec\u02ee\u0370-\u0374\u0376\u0377\u037a-\u037d\u037f\u0386\u0388-\u038a\u038c\u038e-\u03a1\u03a3-\u03f5\u03f7-\u0481\u048a-\u052f\u0531-\u0556\u0559\u0561-\u0587\u05d0-\u05ea\u05f0-\u05f2\u0620-\u064a\u066e\u066f\u0671-\u06d3\u06d5\u06e5\u06e6\u06ee\u06ef\u06fa-\u06fc\u06ff\u0710\u0712-\u072f\u074d-\u07a5\u07b1\u07ca-\u07ea\u07f4\u07f5\u07fa\u0800-\u0815\u081a\u0824\u0828\u0840-\u0858\u08a0-\u08b4\u08b6-\u08bd\u0904-\u0939\u093d\u0950\u0958-\u0961\u0971-\u0980\u0985-\u098c\u098f\u0990\u0993-\u09a8\u09aa-\u09b0\u09b2\u09b6-\u09b9\u09bd\u09ce\u09dc\u09dd\u09df-\u09e1\u09f0\u09f1\u0a05-\u0a0a\u0a0f\u0a10\u0a13-\u0a28\u0a2a-\u0a30\u0a32\u0a33\u0a35\u0a36\u0a38\u0a39\u0a59-\u0a5c\u0a5e\u0a72-\u0a74\u0a85-\u0a8d\u0a8f-\u0a91\u0a93-\u0aa8\u0aaa-\u0ab0\u0ab2\u0ab3\u0ab5-\u0ab9\u0abd\u0ad0\u0ae0\u0ae1\u0af9\u0b05-\u0b0c\u0b0f\u0b10\u0b13-\u0b28\u0b2a-\u0b30\u0b32\u0b33\u0b35-\u0b39\u0b3d\u0b5c\u0b5d\u0b5f-\u0b61\u0b71\u0b83\u0b85-\u0b8a\u0b8e-\u0b90\u0b92-\u0b95\u0b99\u0b9a\u0b9c\u0b9e\u0b9f\u0ba3\u0ba4\u0ba8-\u0baa\u0bae-\u0bb9\u0bd0\u0c05-\u0c0c\u0c0e-\u0c10\u0c12-\u0c28\u0c2a-\u0c39\u0c3d\u0c58-\u0c5a\u0c60\u0c61\u0c80\u0c85-\u0c8c\u0c8e-\u0c90\u0c92-\u0ca8\u0caa-\u0cb3\u0cb5-\u0cb9\u0cbd\u0cde\u0ce0\u0ce1\u0cf1\u0cf2\u0d05-\u0d0c\u0d0e-\u0d10\u0d12-\u0d3a\u0d3d\u0d4e\u0d54-\u0d56\u0d5f-\u0d61\u0d7a-\u0d7f\u0d85-\u0d96\u0d9a-\u0db1\u0db3-\u0dbb\u0dbd\u0dc0-\u0dc6\u0e01-\u0e30\u0e32\u0e33\u0e40-\u0e46\u0e81\u0e82\u0e84\u0e87\u0e88\u0e8a\u0e8d\u0e94-\u0e97\u0e99-\u0e9f\u0ea1-\u0ea3\u0ea5\u0ea7\u0eaa\u0eab\u0ead-\u0eb0\u0eb2\u0eb3\u0ebd\u0ec0-\u0ec4\u0ec6\u0edc-\u0edf\u0f00\u0f40-\u0f47\u0f49-\u0f6c\u0f88-\u0f8c\u1000-\u102a\u103f\u1050-\u1055\u105a-\u105d\u1061\u1065\u1066\u106e-\u1070\u1075-\u1081\u108e\u10a0-\u10c5\u10c7\u10cd\u10d0-\u10fa\u10fc-\u1248\u124a-\u124d\u1250-\u1256\u1258\u125a-\u125d\u1260-\u1288\u128a-\u128d\u1290-\u12b0\u12b2-\u12b5\u12b8-\u12be\u12c0\u12c2-\u12c5\u12c8-\u12d6\u12d8-\u1310\u1312-\u1315\u1318-\u135a\u1380-\u138f\u13a0-\u13f5\u13f8-\u13fd\u1401-\u166c\u166f-\u167f\u1681-\u169a\u16a0-\u16ea\u16ee-\u16f8\u1700-\u170c\u170e-\u1711\u1720-\u1731\u1740-\u1751\u1760-\u176c\u176e-\u1770\u1780-\u17b3\u17d7\u17dc\u1820-\u1877\u1880-\u18a8\u18aa\u18b0-\u18f5\u1900-\u191e\u1950-\u196d\u1970-\u1974\u1980-\u19ab\u19b0-\u19c9\u1a00-\u1a16\u1a20-\u1a54\u1aa7\u1b05-\u1b33\u1b45-\u1b4b\u1b83-\u1ba0\u1bae\u1baf\u1bba-\u1be5\u1c00-\u1c23\u1c4d-\u1c4f\u1c5a-\u1c7d\u1c80-\u1c88\u1ce9-\u1cec\u1cee-\u1cf1\u1cf5\u1cf6\u1d00-\u1dbf\u1e00-\u1f15\u1f18-\u1f1d\u1f20-\u1f45\u1f48-\u1f4d\u1f50-\u1f57\u1f59\u1f5b\u1f5d\u1f5f-\u1f7d\u1f80-\u1fb4\u1fb6-\u1fbc\u1fbe\u1fc2-\u1fc4\u1fc6-\u1fcc\u1fd0-\u1fd3\u1fd6-\u1fdb\u1fe0-\u1fec\u1ff2-\u1ff4\u1ff6-\u1ffc\u2071\u207f\u2090-\u209c\u2102\u2107\u210a-\u2113\u2115\u2118-\u211d\u2124\u2126\u2128\u212a-\u2139\u213c-\u213f\u2145-\u2149\u214e\u2160-\u2188\u2c00-\u2c2e\u2c30-\u2c5e\u2c60-\u2ce4\u2ceb-\u2cee\u2cf2\u2cf3\u2d00-\u2d25\u2d27\u2d2d\u2d30-\u2d67\u2d6f\u2d80-\u2d96\u2da0-\u2da6\u2da8-\u2dae\u2db0-\u2db6\u2db8-\u2dbe\u2dc0-\u2dc6\u2dc8-\u2dce\u2dd0-\u2dd6\u2dd8-\u2dde\u3005-\u3007\u3021-\u3029\u3031-\u3035\u3038-\u303c\u3041-\u3096\u309b-\u309f\u30a1-\u30fa\u30fc-\u30ff\u3105-\u312d\u3131-\u318e\u31a0-\u31ba\u31f0-\u31ff\u3400-\u4db5\u4e00-\u9fd5\ua000-\ua48c\ua4d0-\ua4fd\ua500-\ua60c\ua610-\ua61f\ua62a\ua62b\ua640-\ua66e\ua67f-\ua69d\ua6a0-\ua6ef\ua717-\ua71f\ua722-\ua788\ua78b-\ua7ae\ua7b0-\ua7b7\ua7f7-\ua801\ua803-\ua805\ua807-\ua80a\ua80c-\ua822\ua840-\ua873\ua882-\ua8b3\ua8f2-\ua8f7\ua8fb\ua8fd\ua90a-\ua925\ua930-\ua946\ua960-\ua97c\ua984-\ua9b2\ua9cf\ua9e0-\ua9e4\ua9e6-\ua9ef\ua9fa-\ua9fe\uaa00-\uaa28\uaa40-\uaa42\uaa44-\uaa4b\uaa60-\uaa76\uaa7a\uaa7e-\uaaaf\uaab1\uaab5\uaab6\uaab9-\uaabd\uaac0\uaac2\uaadb-\uaadd\uaae0-\uaaea\uaaf2-\uaaf4\uab01-\uab06\uab09-\uab0e\uab11-\uab16\uab20-\uab26\uab28-\uab2e\uab30-\uab5a\uab5c-\uab65\uab70-\uabe2\uac00-\ud7a3\ud7b0-\ud7c6\ud7cb-\ud7fb\uf900-\ufa6d\ufa70-\ufad9\ufb00-\ufb06\ufb13-\ufb17\ufb1d\ufb1f-\ufb28\ufb2a-\ufb36\ufb38-\ufb3c\ufb3e\ufb40\ufb41\ufb43\ufb44\ufb46-\ufbb1\ufbd3-\ufd3d\ufd50-\ufd8f\ufd92-\ufdc7\ufdf0-\ufdfb\ufe70-\ufe74\ufe76-\ufefc\uff21-\uff3a\uff41-\uff5a\uff66-\uffbe\uffc2-\uffc7\uffca-\uffcf\uffd2-\uffd7\uffda-\uffdc";
+var nonASCIIidentifierChars = "\u200c\u200d\xb7\u0300-\u036f\u0387\u0483-\u0487\u0591-\u05bd\u05bf\u05c1\u05c2\u05c4\u05c5\u05c7\u0610-\u061a\u064b-\u0669\u0670\u06d6-\u06dc\u06df-\u06e4\u06e7\u06e8\u06ea-\u06ed\u06f0-\u06f9\u0711\u0730-\u074a\u07a6-\u07b0\u07c0-\u07c9\u07eb-\u07f3\u0816-\u0819\u081b-\u0823\u0825-\u0827\u0829-\u082d\u0859-\u085b\u08d4-\u08e1\u08e3-\u0903\u093a-\u093c\u093e-\u094f\u0951-\u0957\u0962\u0963\u0966-\u096f\u0981-\u0983\u09bc\u09be-\u09c4\u09c7\u09c8\u09cb-\u09cd\u09d7\u09e2\u09e3\u09e6-\u09ef\u0a01-\u0a03\u0a3c\u0a3e-\u0a42\u0a47\u0a48\u0a4b-\u0a4d\u0a51\u0a66-\u0a71\u0a75\u0a81-\u0a83\u0abc\u0abe-\u0ac5\u0ac7-\u0ac9\u0acb-\u0acd\u0ae2\u0ae3\u0ae6-\u0aef\u0b01-\u0b03\u0b3c\u0b3e-\u0b44\u0b47\u0b48\u0b4b-\u0b4d\u0b56\u0b57\u0b62\u0b63\u0b66-\u0b6f\u0b82\u0bbe-\u0bc2\u0bc6-\u0bc8\u0bca-\u0bcd\u0bd7\u0be6-\u0bef\u0c00-\u0c03\u0c3e-\u0c44\u0c46-\u0c48\u0c4a-\u0c4d\u0c55\u0c56\u0c62\u0c63\u0c66-\u0c6f\u0c81-\u0c83\u0cbc\u0cbe-\u0cc4\u0cc6-\u0cc8\u0cca-\u0ccd\u0cd5\u0cd6\u0ce2\u0ce3\u0ce6-\u0cef\u0d01-\u0d03\u0d3e-\u0d44\u0d46-\u0d48\u0d4a-\u0d4d\u0d57\u0d62\u0d63\u0d66-\u0d6f\u0d82\u0d83\u0dca\u0dcf-\u0dd4\u0dd6\u0dd8-\u0ddf\u0de6-\u0def\u0df2\u0df3\u0e31\u0e34-\u0e3a\u0e47-\u0e4e\u0e50-\u0e59\u0eb1\u0eb4-\u0eb9\u0ebb\u0ebc\u0ec8-\u0ecd\u0ed0-\u0ed9\u0f18\u0f19\u0f20-\u0f29\u0f35\u0f37\u0f39\u0f3e\u0f3f\u0f71-\u0f84\u0f86\u0f87\u0f8d-\u0f97\u0f99-\u0fbc\u0fc6\u102b-\u103e\u1040-\u1049\u1056-\u1059\u105e-\u1060\u1062-\u1064\u1067-\u106d\u1071-\u1074\u1082-\u108d\u108f-\u109d\u135d-\u135f\u1369-\u1371\u1712-\u1714\u1732-\u1734\u1752\u1753\u1772\u1773\u17b4-\u17d3\u17dd\u17e0-\u17e9\u180b-\u180d\u1810-\u1819\u18a9\u1920-\u192b\u1930-\u193b\u1946-\u194f\u19d0-\u19da\u1a17-\u1a1b\u1a55-\u1a5e\u1a60-\u1a7c\u1a7f-\u1a89\u1a90-\u1a99\u1ab0-\u1abd\u1b00-\u1b04\u1b34-\u1b44\u1b50-\u1b59\u1b6b-\u1b73\u1b80-\u1b82\u1ba1-\u1bad\u1bb0-\u1bb9\u1be6-\u1bf3\u1c24-\u1c37\u1c40-\u1c49\u1c50-\u1c59\u1cd0-\u1cd2\u1cd4-\u1ce8\u1ced\u1cf2-\u1cf4\u1cf8\u1cf9\u1dc0-\u1df5\u1dfb-\u1dff\u203f\u2040\u2054\u20d0-\u20dc\u20e1\u20e5-\u20f0\u2cef-\u2cf1\u2d7f\u2de0-\u2dff\u302a-\u302f\u3099\u309a\ua620-\ua629\ua66f\ua674-\ua67d\ua69e\ua69f\ua6f0\ua6f1\ua802\ua806\ua80b\ua823-\ua827\ua880\ua881\ua8b4-\ua8c5\ua8d0-\ua8d9\ua8e0-\ua8f1\ua900-\ua909\ua926-\ua92d\ua947-\ua953\ua980-\ua983\ua9b3-\ua9c0\ua9d0-\ua9d9\ua9e5\ua9f0-\ua9f9\uaa29-\uaa36\uaa43\uaa4c\uaa4d\uaa50-\uaa59\uaa7b-\uaa7d\uaab0\uaab2-\uaab4\uaab7\uaab8\uaabe\uaabf\uaac1\uaaeb-\uaaef\uaaf5\uaaf6\uabe3-\uabea\uabec\uabed\uabf0-\uabf9\ufb1e\ufe00-\ufe0f\ufe20-\ufe2f\ufe33\ufe34\ufe4d-\ufe4f\uff10-\uff19\uff3f";
 
-var nonASCIIidentifierStart = new RegExp("[" + nonASCIIidentifierStartChars + "]")
-var nonASCIIidentifier = new RegExp("[" + nonASCIIidentifierStartChars + nonASCIIidentifierChars + "]")
+var nonASCIIidentifierStart = new RegExp("[" + nonASCIIidentifierStartChars + "]");
+var nonASCIIidentifier = new RegExp("[" + nonASCIIidentifierStartChars + nonASCIIidentifierChars + "]");
 
-nonASCIIidentifierStartChars = nonASCIIidentifierChars = null
+nonASCIIidentifierStartChars = nonASCIIidentifierChars = null;
 
 // These are a run-length and offset encoded representation of the
 // >0xffff code points that are a valid part of identifiers. The
@@ -46,47 +46,47 @@ nonASCIIidentifierStartChars = nonASCIIidentifierChars = null
 // generated by bin/generate-identifier-regex.js
 
 // eslint-disable-next-line comma-spacing
-var astralIdentifierStartCodes = [0,11,2,25,2,18,2,1,2,14,3,13,35,122,70,52,268,28,4,48,48,31,17,26,6,37,11,29,3,35,5,7,2,4,43,157,19,35,5,35,5,39,9,51,157,310,10,21,11,7,153,5,3,0,2,43,2,1,4,0,3,22,11,22,10,30,66,18,2,1,11,21,11,25,71,55,7,1,65,0,16,3,2,2,2,26,45,28,4,28,36,7,2,27,28,53,11,21,11,18,14,17,111,72,56,50,14,50,785,52,76,44,33,24,27,35,42,34,4,0,13,47,15,3,22,0,2,0,36,17,2,24,85,6,2,0,2,3,2,14,2,9,8,46,39,7,3,1,3,21,2,6,2,1,2,4,4,0,19,0,13,4,159,52,19,3,54,47,21,1,2,0,185,46,42,3,37,47,21,0,60,42,86,25,391,63,32,0,449,56,264,8,2,36,18,0,50,29,881,921,103,110,18,195,2749,1070,4050,582,8634,568,8,30,114,29,19,47,17,3,32,20,6,18,881,68,12,0,67,12,65,0,32,6124,20,754,9486,1,3071,106,6,12,4,8,8,9,5991,84,2,70,2,1,3,0,3,1,3,3,2,11,2,0,2,6,2,64,2,3,3,7,2,6,2,27,2,3,2,4,2,0,4,6,2,339,3,24,2,24,2,30,2,24,2,30,2,24,2,30,2,24,2,30,2,24,2,7,4149,196,60,67,1213,3,2,26,2,1,2,0,3,0,2,9,2,3,2,0,2,0,7,0,5,0,2,0,2,0,2,2,2,1,2,0,3,0,2,0,2,0,2,0,2,0,2,1,2,0,3,3,2,6,2,3,2,3,2,0,2,9,2,16,6,2,2,4,2,16,4421,42710,42,4148,12,221,3,5761,10591,541]
+var astralIdentifierStartCodes = [0,11,2,25,2,18,2,1,2,14,3,13,35,122,70,52,268,28,4,48,48,31,17,26,6,37,11,29,3,35,5,7,2,4,43,157,19,35,5,35,5,39,9,51,157,310,10,21,11,7,153,5,3,0,2,43,2,1,4,0,3,22,11,22,10,30,66,18,2,1,11,21,11,25,71,55,7,1,65,0,16,3,2,2,2,26,45,28,4,28,36,7,2,27,28,53,11,21,11,18,14,17,111,72,56,50,14,50,785,52,76,44,33,24,27,35,42,34,4,0,13,47,15,3,22,0,2,0,36,17,2,24,85,6,2,0,2,3,2,14,2,9,8,46,39,7,3,1,3,21,2,6,2,1,2,4,4,0,19,0,13,4,159,52,19,3,54,47,21,1,2,0,185,46,42,3,37,47,21,0,60,42,86,25,391,63,32,0,449,56,264,8,2,36,18,0,50,29,881,921,103,110,18,195,2749,1070,4050,582,8634,568,8,30,114,29,19,47,17,3,32,20,6,18,881,68,12,0,67,12,65,0,32,6124,20,754,9486,1,3071,106,6,12,4,8,8,9,5991,84,2,70,2,1,3,0,3,1,3,3,2,11,2,0,2,6,2,64,2,3,3,7,2,6,2,27,2,3,2,4,2,0,4,6,2,339,3,24,2,24,2,30,2,24,2,30,2,24,2,30,2,24,2,30,2,24,2,7,4149,196,60,67,1213,3,2,26,2,1,2,0,3,0,2,9,2,3,2,0,2,0,7,0,5,0,2,0,2,0,2,2,2,1,2,0,3,0,2,0,2,0,2,0,2,0,2,1,2,0,3,3,2,6,2,3,2,3,2,0,2,9,2,16,6,2,2,4,2,16,4421,42710,42,4148,12,221,3,5761,10591,541];
 
 // eslint-disable-next-line comma-spacing
-var astralIdentifierCodes = [509,0,227,0,150,4,294,9,1368,2,2,1,6,3,41,2,5,0,166,1,1306,2,54,14,32,9,16,3,46,10,54,9,7,2,37,13,2,9,52,0,13,2,49,13,10,2,4,9,83,11,7,0,161,11,6,9,7,3,57,0,2,6,3,1,3,2,10,0,11,1,3,6,4,4,193,17,10,9,87,19,13,9,214,6,3,8,28,1,83,16,16,9,82,12,9,9,84,14,5,9,423,9,838,7,2,7,17,9,57,21,2,13,19882,9,135,4,60,6,26,9,1016,45,17,3,19723,1,5319,4,4,5,9,7,3,6,31,3,149,2,1418,49,513,54,5,49,9,0,15,0,23,4,2,14,1361,6,2,16,3,6,2,1,2,4,2214,6,110,6,6,9,792487,239]
+var astralIdentifierCodes = [509,0,227,0,150,4,294,9,1368,2,2,1,6,3,41,2,5,0,166,1,1306,2,54,14,32,9,16,3,46,10,54,9,7,2,37,13,2,9,52,0,13,2,49,13,10,2,4,9,83,11,7,0,161,11,6,9,7,3,57,0,2,6,3,1,3,2,10,0,11,1,3,6,4,4,193,17,10,9,87,19,13,9,214,6,3,8,28,1,83,16,16,9,82,12,9,9,84,14,5,9,423,9,838,7,2,7,17,9,57,21,2,13,19882,9,135,4,60,6,26,9,1016,45,17,3,19723,1,5319,4,4,5,9,7,3,6,31,3,149,2,1418,49,513,54,5,49,9,0,15,0,23,4,2,14,1361,6,2,16,3,6,2,1,2,4,2214,6,110,6,6,9,792487,239];
 
 // This has a complexity linear to the value of the code. The
 // assumption is that looking up astral identifier characters is
 // rare.
 function isInAstralSet(code, set) {
-  var pos = 0x10000
+  var pos = 0x10000;
   for (var i = 0; i < set.length; i += 2) {
-    pos += set[i]
-    if (pos > code) return false
-    pos += set[i + 1]
-    if (pos >= code) return true
+    pos += set[i];
+    if (pos > code) { return false }
+    pos += set[i + 1];
+    if (pos >= code) { return true }
   }
 }
 
 // Test whether a given character code starts an identifier.
 
 function isIdentifierStart(code, astral) {
-  if (code < 65) return code === 36
-  if (code < 91) return true
-  if (code < 97) return code === 95
-  if (code < 123) return true
-  if (code <= 0xffff) return code >= 0xaa && nonASCIIidentifierStart.test(String.fromCharCode(code))
-  if (astral === false) return false
+  if (code < 65) { return code === 36 }
+  if (code < 91) { return true }
+  if (code < 97) { return code === 95 }
+  if (code < 123) { return true }
+  if (code <= 0xffff) { return code >= 0xaa && nonASCIIidentifierStart.test(String.fromCharCode(code)) }
+  if (astral === false) { return false }
   return isInAstralSet(code, astralIdentifierStartCodes)
 }
 
 // Test whether a given character is part of an identifier.
 
 function isIdentifierChar(code, astral) {
-  if (code < 48) return code === 36
-  if (code < 58) return true
-  if (code < 65) return false
-  if (code < 91) return true
-  if (code < 97) return code === 95
-  if (code < 123) return true
-  if (code <= 0xffff) return code >= 0xaa && nonASCIIidentifier.test(String.fromCharCode(code))
-  if (astral === false) return false
+  if (code < 48) { return code === 36 }
+  if (code < 58) { return true }
+  if (code < 65) { return false }
+  if (code < 91) { return true }
+  if (code < 97) { return code === 95 }
+  if (code < 123) { return true }
+  if (code <= 0xffff) { return code >= 0xaa && nonASCIIidentifier.test(String.fromCharCode(code)) }
+  if (astral === false) { return false }
   return isInAstralSet(code, astralIdentifierStartCodes) || isInAstralSet(code, astralIdentifierCodes)
 }
 
@@ -116,16 +116,16 @@ function isIdentifierChar(code, astral) {
 var TokenType = function TokenType(label, conf) {
   if ( conf === void 0 ) conf = {};
 
-  this.label = label
-  this.keyword = conf.keyword
-  this.beforeExpr = !!conf.beforeExpr
-  this.startsExpr = !!conf.startsExpr
-  this.isLoop = !!conf.isLoop
-  this.isAssign = !!conf.isAssign
-  this.prefix = !!conf.prefix
-  this.postfix = !!conf.postfix
-  this.binop = conf.binop || null
-  this.updateContext = null
+  this.label = label;
+  this.keyword = conf.keyword;
+  this.beforeExpr = !!conf.beforeExpr;
+  this.startsExpr = !!conf.startsExpr;
+  this.isLoop = !!conf.isLoop;
+  this.isAssign = !!conf.isAssign;
+  this.prefix = !!conf.prefix;
+  this.postfix = !!conf.postfix;
+  this.binop = conf.binop || null;
+  this.updateContext = null;
 };
 
 function binop(name, prec) {
@@ -133,19 +133,20 @@ function binop(name, prec) {
 }
 var beforeExpr = {beforeExpr: true};
 var startsExpr = {startsExpr: true};
+
 // Map keyword names to token types.
 
-var keywordTypes = {}
+var keywords$1 = {};
 
 // Succinct definitions of keyword token types
 function kw(name, options) {
   if ( options === void 0 ) options = {};
 
-  options.keyword = name
-  return keywordTypes[name] = new TokenType(name, options)
+  options.keyword = name;
+  return keywords$1[name] = new TokenType(name, options)
 }
 
-var tt = {
+var types = {
   num: new TokenType("num", startsExpr),
   regexp: new TokenType("regexp", startsExpr),
   string: new TokenType("string", startsExpr),
@@ -166,6 +167,7 @@ var tt = {
   question: new TokenType("?", beforeExpr),
   arrow: new TokenType("=>", beforeExpr),
   template: new TokenType("template"),
+  invalidTemplate: new TokenType("invalidTemplate"),
   ellipsis: new TokenType("...", beforeExpr),
   backQuote: new TokenType("`", startsExpr),
   dollarBraceL: new TokenType("${", {beforeExpr: true, startsExpr: true}),
@@ -226,7 +228,7 @@ var tt = {
   _new: kw("new", {beforeExpr: true, startsExpr: true}),
   _this: kw("this", startsExpr),
   _super: kw("super", startsExpr),
-  _class: kw("class"),
+  _class: kw("class", startsExpr),
   _extends: kw("extends", beforeExpr),
   _export: kw("export"),
   _import: kw("import"),
@@ -238,21 +240,21 @@ var tt = {
   _typeof: kw("typeof", {beforeExpr: true, prefix: true, startsExpr: true}),
   _void: kw("void", {beforeExpr: true, prefix: true, startsExpr: true}),
   _delete: kw("delete", {beforeExpr: true, prefix: true, startsExpr: true})
-}
+};
 
 // Matches a whole line break (where CRLF is considered a single
 // line break). Used to count lines.
 
-var lineBreak = /\r\n?|\n|\u2028|\u2029/
-var lineBreakG = new RegExp(lineBreak.source, "g")
+var lineBreak = /\r\n?|\n|\u2028|\u2029/;
+var lineBreakG = new RegExp(lineBreak.source, "g");
 
 function isNewLine(code) {
   return code === 10 || code === 13 || code === 0x2028 || code === 0x2029
 }
 
-var nonASCIIwhitespace = /[\u1680\u180e\u2000-\u200a\u202f\u205f\u3000\ufeff]/
+var nonASCIIwhitespace = /[\u1680\u180e\u2000-\u200a\u202f\u205f\u3000\ufeff]/;
 
-var skipWhiteSpace = /(?:\s|\/\/.*|\/\*[^]*?\*\/)*/g
+var skipWhiteSpace = /(?:\s|\/\/.*|\/\*[^]*?\*\/)*/g;
 
 var ref = Object.prototype;
 var hasOwnProperty = ref.hasOwnProperty;
@@ -266,14 +268,14 @@ function has(obj, propName) {
 
 var isArray = Array.isArray || (function (obj) { return (
   toString.call(obj) === "[object Array]"
-); })
+); });
 
 // These are used when `options.locations` is on, for the
 // `startLoc` and `endLoc` properties.
 
 var Position = function Position(line, col) {
-  this.line = line
-  this.column = col
+  this.line = line;
+  this.column = col;
 };
 
 Position.prototype.offset = function offset (n) {
@@ -281,9 +283,9 @@ Position.prototype.offset = function offset (n) {
 };
 
 var SourceLocation = function SourceLocation(p, start, end) {
-  this.start = start
-  this.end = end
-  if (p.sourceFile !== null) this.source = p.sourceFile
+  this.start = start;
+  this.end = end;
+  if (p.sourceFile !== null) { this.source = p.sourceFile; }
 };
 
 // The `getLineInfo` function is mostly useful when the
@@ -294,11 +296,11 @@ var SourceLocation = function SourceLocation(p, start, end) {
 
 function getLineInfo(input, offset) {
   for (var line = 1, cur = 0;;) {
-    lineBreakG.lastIndex = cur
-    var match = lineBreakG.exec(input)
+    lineBreakG.lastIndex = cur;
+    var match = lineBreakG.exec(input);
     if (match && match.index < offset) {
-      ++line
-      cur = match.index + match[0].length
+      ++line;
+      cur = match.index + match[0].length;
     } else {
       return new Position(line, offset - cur)
     }
@@ -388,28 +390,28 @@ var defaultOptions = {
   // (non-standard) ParenthesizedExpression nodes
   preserveParens: false,
   plugins: {}
-}
+};
 
 // Interpret and default an options object
 
 function getOptions(opts) {
-  var options = {}
+  var options = {};
 
   for (var opt in defaultOptions)
-    options[opt] = opts && has(opts, opt) ? opts[opt] : defaultOptions[opt]
+    { options[opt] = opts && has(opts, opt) ? opts[opt] : defaultOptions[opt]; }
 
   if (options.ecmaVersion >= 2015)
-    options.ecmaVersion -= 2009
+    { options.ecmaVersion -= 2009; }
 
   if (options.allowReserved == null)
-    options.allowReserved = options.ecmaVersion < 5
+    { options.allowReserved = options.ecmaVersion < 5; }
 
   if (isArray(options.onToken)) {
-    var tokens = options.onToken
-    options.onToken = function (token) { return tokens.push(token); }
+    var tokens = options.onToken;
+    options.onToken = function (token) { return tokens.push(token); };
   }
   if (isArray(options.onComment))
-    options.onComment = pushComment(options, options.onComment)
+    { options.onComment = pushComment(options, options.onComment); }
 
   return options
 }
@@ -421,100 +423,100 @@ function pushComment(options, array) {
       value: text,
       start: start,
       end: end
-    }
+    };
     if (options.locations)
-      comment.loc = new SourceLocation(this, startLoc, endLoc)
+      { comment.loc = new SourceLocation(this, startLoc, endLoc); }
     if (options.ranges)
-      comment.range = [start, end]
-    array.push(comment)
+      { comment.range = [start, end]; }
+    array.push(comment);
   }
 }
 
 // Registered plugins
-var plugins = {}
+var plugins = {};
 
 function keywordRegexp(words) {
-  return new RegExp("^(" + words.replace(/ /g, "|") + ")$")
+  return new RegExp("^(?:" + words.replace(/ /g, "|") + ")$")
 }
 
 var Parser = function Parser(options, input, startPos) {
-  this.options = options = getOptions(options)
-  this.sourceFile = options.sourceFile
-  this.keywords = keywordRegexp(keywords[options.ecmaVersion >= 6 ? 6 : 5])
-  var reserved = ""
+  this.options = options = getOptions(options);
+  this.sourceFile = options.sourceFile;
+  this.keywords = keywordRegexp(keywords[options.ecmaVersion >= 6 ? 6 : 5]);
+  var reserved = "";
   if (!options.allowReserved) {
     for (var v = options.ecmaVersion;; v--)
-      if (reserved = reservedWords[v]) break
-    if (options.sourceType == "module") reserved += " await"
+      { if (reserved = reservedWords[v]) { break } }
+    if (options.sourceType == "module") { reserved += " await"; }
   }
-  this.reservedWords = keywordRegexp(reserved)
-  var reservedStrict = (reserved ? reserved + " " : "") + reservedWords.strict
-  this.reservedWordsStrict = keywordRegexp(reservedStrict)
-  this.reservedWordsStrictBind = keywordRegexp(reservedStrict + " " + reservedWords.strictBind)
-  this.input = String(input)
+  this.reservedWords = keywordRegexp(reserved);
+  var reservedStrict = (reserved ? reserved + " " : "") + reservedWords.strict;
+  this.reservedWordsStrict = keywordRegexp(reservedStrict);
+  this.reservedWordsStrictBind = keywordRegexp(reservedStrict + " " + reservedWords.strictBind);
+  this.input = String(input);
 
   // Used to signal to callers of `readWord1` whether the word
   // contained any escape sequences. This is needed because words with
   // escape sequences must not be interpreted as keywords.
-  this.containsEsc = false
+  this.containsEsc = false;
 
   // Load plugins
-  this.loadPlugins(options.plugins)
+  this.loadPlugins(options.plugins);
 
   // Set up token state
 
   // The current position of the tokenizer in the input.
   if (startPos) {
-    this.pos = startPos
-    this.lineStart = this.input.lastIndexOf("\n", startPos - 1) + 1
-    this.curLine = this.input.slice(0, this.lineStart).split(lineBreak).length
+    this.pos = startPos;
+    this.lineStart = this.input.lastIndexOf("\n", startPos - 1) + 1;
+    this.curLine = this.input.slice(0, this.lineStart).split(lineBreak).length;
   } else {
-    this.pos = this.lineStart = 0
-    this.curLine = 1
+    this.pos = this.lineStart = 0;
+    this.curLine = 1;
   }
 
   // Properties of the current token:
   // Its type
-  this.type = tt.eof
+  this.type = types.eof;
   // For tokens that include more information than their type, the value
-  this.value = null
+  this.value = null;
   // Its start and end offset
-  this.start = this.end = this.pos
+  this.start = this.end = this.pos;
   // And, if locations are used, the {line, column} object
   // corresponding to those offsets
-  this.startLoc = this.endLoc = this.curPosition()
+  this.startLoc = this.endLoc = this.curPosition();
 
   // Position information for the previous token
-  this.lastTokEndLoc = this.lastTokStartLoc = null
-  this.lastTokStart = this.lastTokEnd = this.pos
+  this.lastTokEndLoc = this.lastTokStartLoc = null;
+  this.lastTokStart = this.lastTokEnd = this.pos;
 
   // The context stack is used to superficially track syntactic
   // context to predict whether a regular expression is allowed in a
   // given position.
-  this.context = this.initialContext()
-  this.exprAllowed = true
+  this.context = this.initialContext();
+  this.exprAllowed = true;
 
   // Figure out if it's a module code.
-  this.inModule = options.sourceType === "module"
-  this.strict = this.inModule || this.strictDirective(this.pos)
+  this.inModule = options.sourceType === "module";
+  this.strict = this.inModule || this.strictDirective(this.pos);
 
   // Used to signify the start of a potential arrow function
-  this.potentialArrowAt = -1
+  this.potentialArrowAt = -1;
 
   // Flags to track whether we are in a function, a generator, an async function.
-  this.inFunction = this.inGenerator = this.inAsync = false
+  this.inFunction = this.inGenerator = this.inAsync = false;
   // Positions to delayed-check that yield/await does not exist in default parameters.
-  this.yieldPos = this.awaitPos = 0
+  this.yieldPos = this.awaitPos = 0;
   // Labels in scope.
-  this.labels = []
+  this.labels = [];
 
   // If enabled, skip leading hashbang line.
   if (this.pos === 0 && options.allowHashBang && this.input.slice(0, 2) === "#!")
-    this.skipLineComment(2)
+    { this.skipLineComment(2); }
 
   // Scope tracking for duplicate variable names (see scope.js)
-  this.scopeStack = []
-  this.enterFunctionScope()
+  this.scopeStack = [];
+  this.enterFunctionScope();
 };
 
 // DEPRECATED Kept for backwards compatibility until 3.0 in case a plugin uses them
@@ -522,151 +524,155 @@ Parser.prototype.isKeyword = function isKeyword (word) { return this.keywords.te
 Parser.prototype.isReservedWord = function isReservedWord (word) { return this.reservedWords.test(word) };
 
 Parser.prototype.extend = function extend (name, f) {
-  this[name] = f(this[name])
+  this[name] = f(this[name]);
 };
 
 Parser.prototype.loadPlugins = function loadPlugins (pluginConfigs) {
     var this$1 = this;
 
   for (var name in pluginConfigs) {
-    var plugin = plugins[name]
-    if (!plugin) throw new Error("Plugin '" + name + "' not found")
-    plugin(this$1, pluginConfigs[name])
+    var plugin = plugins[name];
+    if (!plugin) { throw new Error("Plugin '" + name + "' not found") }
+    plugin(this$1, pluginConfigs[name]);
   }
 };
 
 Parser.prototype.parse = function parse () {
-  var node = this.options.program || this.startNode()
-  this.nextToken()
+  var node = this.options.program || this.startNode();
+  this.nextToken();
   return this.parseTopLevel(node)
 };
 
-var pp = Parser.prototype
+var pp = Parser.prototype;
 
 // ## Parser utilities
 
-var literal = /^(?:'((?:[^']|\.)*)'|"((?:[^"]|\.)*)"|;)/
+var literal = /^(?:'((?:[^']|\.)*)'|"((?:[^"]|\.)*)"|;)/;
 pp.strictDirective = function(start) {
   var this$1 = this;
 
   for (;;) {
-    skipWhiteSpace.lastIndex = start
-    start += skipWhiteSpace.exec(this$1.input)[0].length
-    var match = literal.exec(this$1.input.slice(start))
-    if (!match) return false
-    if ((match[1] || match[2]) == "use strict") return true
-    start += match[0].length
+    skipWhiteSpace.lastIndex = start;
+    start += skipWhiteSpace.exec(this$1.input)[0].length;
+    var match = literal.exec(this$1.input.slice(start));
+    if (!match) { return false }
+    if ((match[1] || match[2]) == "use strict") { return true }
+    start += match[0].length;
   }
-}
+};
 
 // Predicate that tests whether the next token is of the given
 // type, and if yes, consumes it as a side effect.
 
 pp.eat = function(type) {
   if (this.type === type) {
-    this.next()
+    this.next();
     return true
   } else {
     return false
   }
-}
+};
 
 // Tests whether parsed token is a contextual keyword.
 
 pp.isContextual = function(name) {
-  return this.type === tt.name && this.value === name
-}
+  return this.type === types.name && this.value === name
+};
 
 // Consumes contextual keyword if possible.
 
 pp.eatContextual = function(name) {
-  return this.value === name && this.eat(tt.name)
-}
+  return this.value === name && this.eat(types.name)
+};
 
 // Asserts that following token is given contextual keyword.
 
 pp.expectContextual = function(name) {
-  if (!this.eatContextual(name)) this.unexpected()
-}
+  if (!this.eatContextual(name)) { this.unexpected(); }
+};
 
 // Test whether a semicolon can be inserted at the current position.
 
 pp.canInsertSemicolon = function() {
-  return this.type === tt.eof ||
-    this.type === tt.braceR ||
+  return this.type === types.eof ||
+    this.type === types.braceR ||
     lineBreak.test(this.input.slice(this.lastTokEnd, this.start))
-}
+};
 
 pp.insertSemicolon = function() {
   if (this.canInsertSemicolon()) {
     if (this.options.onInsertedSemicolon)
-      this.options.onInsertedSemicolon(this.lastTokEnd, this.lastTokEndLoc)
+      { this.options.onInsertedSemicolon(this.lastTokEnd, this.lastTokEndLoc); }
     return true
   }
-}
+};
 
 // Consume a semicolon, or, failing that, see if we are allowed to
 // pretend that there is a semicolon at this position.
 
 pp.semicolon = function() {
-  if (!this.eat(tt.semi) && !this.insertSemicolon()) this.unexpected()
-}
+  if (!this.eat(types.semi) && !this.insertSemicolon()) { this.unexpected(); }
+};
 
 pp.afterTrailingComma = function(tokType, notNext) {
   if (this.type == tokType) {
     if (this.options.onTrailingComma)
-      this.options.onTrailingComma(this.lastTokStart, this.lastTokStartLoc)
+      { this.options.onTrailingComma(this.lastTokStart, this.lastTokStartLoc); }
     if (!notNext)
-      this.next()
+      { this.next(); }
     return true
   }
-}
+};
 
 // Expect a token of a given type. If found, consume it, otherwise,
 // raise an unexpected token error.
 
 pp.expect = function(type) {
-  this.eat(type) || this.unexpected()
-}
+  this.eat(type) || this.unexpected();
+};
 
 // Raise an unexpected token error.
 
 pp.unexpected = function(pos) {
-  this.raise(pos != null ? pos : this.start, "Unexpected token")
-}
-
-var DestructuringErrors = function DestructuringErrors() {
-  this.shorthandAssign = this.trailingComma = this.parenthesizedAssign = this.parenthesizedBind = -1
+  this.raise(pos != null ? pos : this.start, "Unexpected token");
 };
 
+function DestructuringErrors() {
+  this.shorthandAssign =
+  this.trailingComma =
+  this.parenthesizedAssign =
+  this.parenthesizedBind =
+    -1;
+}
+
 pp.checkPatternErrors = function(refDestructuringErrors, isAssign) {
-  if (!refDestructuringErrors) return
+  if (!refDestructuringErrors) { return }
   if (refDestructuringErrors.trailingComma > -1)
-    this.raiseRecoverable(refDestructuringErrors.trailingComma, "Comma is not permitted after the rest element")
-  var parens = isAssign ? refDestructuringErrors.parenthesizedAssign : refDestructuringErrors.parenthesizedBind
-  if (parens > -1) this.raiseRecoverable(parens, "Parenthesized pattern")
-}
+    { this.raiseRecoverable(refDestructuringErrors.trailingComma, "Comma is not permitted after the rest element"); }
+  var parens = isAssign ? refDestructuringErrors.parenthesizedAssign : refDestructuringErrors.parenthesizedBind;
+  if (parens > -1) { this.raiseRecoverable(parens, "Parenthesized pattern"); }
+};
 
 pp.checkExpressionErrors = function(refDestructuringErrors, andThrow) {
-  var pos = refDestructuringErrors ? refDestructuringErrors.shorthandAssign : -1
-  if (!andThrow) return pos >= 0
-  if (pos > -1) this.raise(pos, "Shorthand property assignments are valid only in destructuring patterns")
-}
+  var pos = refDestructuringErrors ? refDestructuringErrors.shorthandAssign : -1;
+  if (!andThrow) { return pos >= 0 }
+  if (pos > -1) { this.raise(pos, "Shorthand property assignments are valid only in destructuring patterns"); }
+};
 
 pp.checkYieldAwaitInDefaultParams = function() {
   if (this.yieldPos && (!this.awaitPos || this.yieldPos < this.awaitPos))
-    this.raise(this.yieldPos, "Yield expression cannot be a default value")
+    { this.raise(this.yieldPos, "Yield expression cannot be a default value"); }
   if (this.awaitPos)
-    this.raise(this.awaitPos, "Await expression cannot be a default value")
-}
+    { this.raise(this.awaitPos, "Await expression cannot be a default value"); }
+};
 
 pp.isSimpleAssignTarget = function(expr) {
   if (expr.type === "ParenthesizedExpression")
-    return this.isSimpleAssignTarget(expr.expression)
+    { return this.isSimpleAssignTarget(expr.expression) }
   return expr.type === "Identifier" || expr.type === "MemberExpression"
-}
+};
 
-var pp$1 = Parser.prototype
+var pp$1 = Parser.prototype;
 
 // ### Statement parsing
 
@@ -678,50 +684,51 @@ var pp$1 = Parser.prototype
 pp$1.parseTopLevel = function(node) {
   var this$1 = this;
 
-  var exports = {}
-  if (!node.body) node.body = []
-  while (this.type !== tt.eof) {
-    var stmt = this$1.parseStatement(true, true, exports)
-    node.body.push(stmt)
+  var exports = {};
+  if (!node.body) { node.body = []; }
+  while (this.type !== types.eof) {
+    var stmt = this$1.parseStatement(true, true, exports);
+    node.body.push(stmt);
   }
-  this.next()
+  this.next();
   if (this.options.ecmaVersion >= 6) {
-    node.sourceType = this.options.sourceType
+    node.sourceType = this.options.sourceType;
   }
   return this.finishNode(node, "Program")
-}
+};
 
 var loopLabel = {kind: "loop"};
 var switchLabel = {kind: "switch"};
+
 pp$1.isLet = function() {
-  if (this.type !== tt.name || this.options.ecmaVersion < 6 || this.value != "let") return false
-  skipWhiteSpace.lastIndex = this.pos
-  var skip = skipWhiteSpace.exec(this.input)
-  var next = this.pos + skip[0].length, nextCh = this.input.charCodeAt(next)
-  if (nextCh === 91 || nextCh == 123) return true // '{' and '['
+  if (this.type !== types.name || this.options.ecmaVersion < 6 || this.value != "let") { return false }
+  skipWhiteSpace.lastIndex = this.pos;
+  var skip = skipWhiteSpace.exec(this.input);
+  var next = this.pos + skip[0].length, nextCh = this.input.charCodeAt(next);
+  if (nextCh === 91 || nextCh == 123) { return true } // '{' and '['
   if (isIdentifierStart(nextCh, true)) {
-    var pos = next + 1
-    while (isIdentifierChar(this.input.charCodeAt(pos), true)) ++pos
-    var ident = this.input.slice(next, pos)
-    if (!this.isKeyword(ident)) return true
+    var pos = next + 1;
+    while (isIdentifierChar(this.input.charCodeAt(pos), true)) { ++pos; }
+    var ident = this.input.slice(next, pos);
+    if (!this.isKeyword(ident)) { return true }
   }
   return false
-}
+};
 
 // check 'async [no LineTerminator here] function'
 // - 'async /*foo*/ function' is OK.
 // - 'async /*\n*/ function' is invalid.
 pp$1.isAsyncFunction = function() {
-  if (this.type !== tt.name || this.options.ecmaVersion < 8 || this.value != "async")
-    return false
+  if (this.type !== types.name || this.options.ecmaVersion < 8 || this.value != "async")
+    { return false }
 
-  skipWhiteSpace.lastIndex = this.pos
-  var skip = skipWhiteSpace.exec(this.input)
-  var next = this.pos + skip[0].length
+  skipWhiteSpace.lastIndex = this.pos;
+  var skip = skipWhiteSpace.exec(this.input);
+  var next = this.pos + skip[0].length;
   return !lineBreak.test(this.input.slice(this.pos, next)) &&
     this.input.slice(next, next + 8) === "function" &&
     (next + 8 == this.input.length || !isIdentifierChar(this.input.charAt(next + 8)))
-}
+};
 
 // Parse a single statement.
 //
@@ -731,11 +738,11 @@ pp$1.isAsyncFunction = function() {
 // does not help.
 
 pp$1.parseStatement = function(declaration, topLevel, exports) {
-  var starttype = this.type, node = this.startNode(), kind
+  var starttype = this.type, node = this.startNode(), kind;
 
   if (this.isLet()) {
-    starttype = tt._var
-    kind = "let"
+    starttype = types._var;
+    kind = "let";
   }
 
   // Most types of statements are recognized by the keyword they
@@ -743,38 +750,38 @@ pp$1.parseStatement = function(declaration, topLevel, exports) {
   // complexity.
 
   switch (starttype) {
-  case tt._break: case tt._continue: return this.parseBreakContinueStatement(node, starttype.keyword)
-  case tt._debugger: return this.parseDebuggerStatement(node)
-  case tt._do: return this.parseDoStatement(node)
-  case tt._for: return this.parseForStatement(node)
-  case tt._function:
-    if (!declaration && this.options.ecmaVersion >= 6) this.unexpected()
+  case types._break: case types._continue: return this.parseBreakContinueStatement(node, starttype.keyword)
+  case types._debugger: return this.parseDebuggerStatement(node)
+  case types._do: return this.parseDoStatement(node)
+  case types._for: return this.parseForStatement(node)
+  case types._function:
+    if (!declaration && this.options.ecmaVersion >= 6) { this.unexpected(); }
     return this.parseFunctionStatement(node, false)
-  case tt._class:
-    if (!declaration) this.unexpected()
+  case types._class:
+    if (!declaration) { this.unexpected(); }
     return this.parseClass(node, true)
-  case tt._if: return this.parseIfStatement(node)
-  case tt._return: return this.parseReturnStatement(node)
-  case tt._switch: return this.parseSwitchStatement(node)
-  case tt._throw: return this.parseThrowStatement(node)
-  case tt._try: return this.parseTryStatement(node)
-  case tt._const: case tt._var:
-    kind = kind || this.value
-    if (!declaration && kind != "var") this.unexpected()
+  case types._if: return this.parseIfStatement(node)
+  case types._return: return this.parseReturnStatement(node)
+  case types._switch: return this.parseSwitchStatement(node)
+  case types._throw: return this.parseThrowStatement(node)
+  case types._try: return this.parseTryStatement(node)
+  case types._const: case types._var:
+    kind = kind || this.value;
+    if (!declaration && kind != "var") { this.unexpected(); }
     return this.parseVarStatement(node, kind)
-  case tt._while: return this.parseWhileStatement(node)
-  case tt._with: return this.parseWithStatement(node)
-  case tt.braceL: return this.parseBlock()
-  case tt.semi: return this.parseEmptyStatement(node)
-  case tt._export:
-  case tt._import:
+  case types._while: return this.parseWhileStatement(node)
+  case types._with: return this.parseWithStatement(node)
+  case types.braceL: return this.parseBlock()
+  case types.semi: return this.parseEmptyStatement(node)
+  case types._export:
+  case types._import:
     if (!this.options.allowImportExportEverywhere) {
       if (!topLevel)
-        this.raise(this.start, "'import' and 'export' may only appear at the top level")
+        { this.raise(this.start, "'import' and 'export' may only appear at the top level"); }
       if (!this.inModule)
-        this.raise(this.start, "'import' and 'export' may appear only with 'sourceType: module'")
+        { this.raise(this.start, "'import' and 'export' may appear only with 'sourceType: module'"); }
     }
-    return starttype === tt._import ? this.parseImport(node) : this.parseExport(node, exports)
+    return starttype === types._import ? this.parseImport(node) : this.parseExport(node, exports)
 
     // If the statement does not start with a statement keyword or a
     // brace, it's an ExpressionStatement or LabeledStatement. We
@@ -783,62 +790,62 @@ pp$1.parseStatement = function(declaration, topLevel, exports) {
     // Identifier node, we switch to interpreting it as a label.
   default:
     if (this.isAsyncFunction() && declaration) {
-      this.next()
+      this.next();
       return this.parseFunctionStatement(node, true)
     }
 
-    var maybeName = this.value, expr = this.parseExpression()
-    if (starttype === tt.name && expr.type === "Identifier" && this.eat(tt.colon))
-      return this.parseLabeledStatement(node, maybeName, expr)
-    else return this.parseExpressionStatement(node, expr)
+    var maybeName = this.value, expr = this.parseExpression();
+    if (starttype === types.name && expr.type === "Identifier" && this.eat(types.colon))
+      { return this.parseLabeledStatement(node, maybeName, expr) }
+    else { return this.parseExpressionStatement(node, expr) }
   }
-}
+};
 
 pp$1.parseBreakContinueStatement = function(node, keyword) {
   var this$1 = this;
 
-  var isBreak = keyword == "break"
-  this.next()
-  if (this.eat(tt.semi) || this.insertSemicolon()) node.label = null
-  else if (this.type !== tt.name) this.unexpected()
+  var isBreak = keyword == "break";
+  this.next();
+  if (this.eat(types.semi) || this.insertSemicolon()) { node.label = null; }
+  else if (this.type !== types.name) { this.unexpected(); }
   else {
-    node.label = this.parseIdent()
-    this.semicolon()
+    node.label = this.parseIdent();
+    this.semicolon();
   }
 
   // Verify that there is an actual destination to break or
   // continue to.
-  var i = 0
+  var i = 0;
   for (; i < this.labels.length; ++i) {
-    var lab = this$1.labels[i]
+    var lab = this$1.labels[i];
     if (node.label == null || lab.name === node.label.name) {
-      if (lab.kind != null && (isBreak || lab.kind === "loop")) break
-      if (node.label && isBreak) break
+      if (lab.kind != null && (isBreak || lab.kind === "loop")) { break }
+      if (node.label && isBreak) { break }
     }
   }
-  if (i === this.labels.length) this.raise(node.start, "Unsyntactic " + keyword)
+  if (i === this.labels.length) { this.raise(node.start, "Unsyntactic " + keyword); }
   return this.finishNode(node, isBreak ? "BreakStatement" : "ContinueStatement")
-}
+};
 
 pp$1.parseDebuggerStatement = function(node) {
-  this.next()
-  this.semicolon()
+  this.next();
+  this.semicolon();
   return this.finishNode(node, "DebuggerStatement")
-}
+};
 
 pp$1.parseDoStatement = function(node) {
-  this.next()
-  this.labels.push(loopLabel)
-  node.body = this.parseStatement(false)
-  this.labels.pop()
-  this.expect(tt._while)
-  node.test = this.parseParenExpression()
+  this.next();
+  this.labels.push(loopLabel);
+  node.body = this.parseStatement(false);
+  this.labels.pop();
+  this.expect(types._while);
+  node.test = this.parseParenExpression();
   if (this.options.ecmaVersion >= 6)
-    this.eat(tt.semi)
+    { this.eat(types.semi); }
   else
-    this.semicolon()
+    { this.semicolon(); }
   return this.finishNode(node, "DoWhileStatement")
-}
+};
 
 // Disambiguating between a `for` and a `for`/`in` or `for`/`of`
 // loop is non-trivial. Basically, we have to parse the init `var`
@@ -849,202 +856,207 @@ pp$1.parseDoStatement = function(node) {
 // is a regular `for` loop.
 
 pp$1.parseForStatement = function(node) {
-  this.next()
-  this.labels.push(loopLabel)
-  this.enterLexicalScope()
-  this.expect(tt.parenL)
-  if (this.type === tt.semi) return this.parseFor(node, null)
-  var isLet = this.isLet()
-  if (this.type === tt._var || this.type === tt._const || isLet) {
-    var init$1 = this.startNode(), kind = isLet ? "let" : this.value
-    this.next()
-    this.parseVar(init$1, true, kind)
-    this.finishNode(init$1, "VariableDeclaration")
-    if ((this.type === tt._in || (this.options.ecmaVersion >= 6 && this.isContextual("of"))) && init$1.declarations.length === 1 &&
+  this.next();
+  this.labels.push(loopLabel);
+  this.enterLexicalScope();
+  this.expect(types.parenL);
+  if (this.type === types.semi) { return this.parseFor(node, null) }
+  var isLet = this.isLet();
+  if (this.type === types._var || this.type === types._const || isLet) {
+    var init$1 = this.startNode(), kind = isLet ? "let" : this.value;
+    this.next();
+    this.parseVar(init$1, true, kind);
+    this.finishNode(init$1, "VariableDeclaration");
+    if ((this.type === types._in || (this.options.ecmaVersion >= 6 && this.isContextual("of"))) && init$1.declarations.length === 1 &&
         !(kind !== "var" && init$1.declarations[0].init))
-      return this.parseForIn(node, init$1)
+      { return this.parseForIn(node, init$1) }
     return this.parseFor(node, init$1)
   }
-  var refDestructuringErrors = new DestructuringErrors
-  var init = this.parseExpression(true, refDestructuringErrors)
-  if (this.type === tt._in || (this.options.ecmaVersion >= 6 && this.isContextual("of"))) {
-    this.toAssignable(init)
-    this.checkLVal(init)
-    this.checkPatternErrors(refDestructuringErrors, true)
+  var refDestructuringErrors = new DestructuringErrors;
+  var init = this.parseExpression(true, refDestructuringErrors);
+  if (this.type === types._in || (this.options.ecmaVersion >= 6 && this.isContextual("of"))) {
+    this.toAssignable(init);
+    this.checkLVal(init);
+    this.checkPatternErrors(refDestructuringErrors, true);
     return this.parseForIn(node, init)
   } else {
-    this.checkExpressionErrors(refDestructuringErrors, true)
+    this.checkExpressionErrors(refDestructuringErrors, true);
   }
   return this.parseFor(node, init)
-}
+};
 
 pp$1.parseFunctionStatement = function(node, isAsync) {
-  this.next()
+  this.next();
   return this.parseFunction(node, true, false, isAsync)
-}
+};
 
 pp$1.isFunction = function() {
-  return this.type === tt._function || this.isAsyncFunction()
-}
+  return this.type === types._function || this.isAsyncFunction()
+};
 
 pp$1.parseIfStatement = function(node) {
-  this.next()
-  node.test = this.parseParenExpression()
+  this.next();
+  node.test = this.parseParenExpression();
   // allow function declarations in branches, but only in non-strict mode
-  node.consequent = this.parseStatement(!this.strict && this.isFunction())
-  node.alternate = this.eat(tt._else) ? this.parseStatement(!this.strict && this.isFunction()) : null
+  node.consequent = this.parseStatement(!this.strict && this.isFunction());
+  node.alternate = this.eat(types._else) ? this.parseStatement(!this.strict && this.isFunction()) : null;
   return this.finishNode(node, "IfStatement")
-}
+};
 
 pp$1.parseReturnStatement = function(node) {
   if (!this.inFunction && !this.options.allowReturnOutsideFunction)
-    this.raise(this.start, "'return' outside of function")
-  this.next()
+    { this.raise(this.start, "'return' outside of function"); }
+  this.next();
 
   // In `return` (and `break`/`continue`), the keywords with
   // optional arguments, we eagerly look for a semicolon or the
   // possibility to insert one.
 
-  if (this.eat(tt.semi) || this.insertSemicolon()) node.argument = null
-  else { node.argument = this.parseExpression(); this.semicolon() }
+  if (this.eat(types.semi) || this.insertSemicolon()) { node.argument = null; }
+  else { node.argument = this.parseExpression(); this.semicolon(); }
   return this.finishNode(node, "ReturnStatement")
-}
+};
 
 pp$1.parseSwitchStatement = function(node) {
   var this$1 = this;
 
-  this.next()
-  node.discriminant = this.parseParenExpression()
-  node.cases = []
-  this.expect(tt.braceL)
-  this.labels.push(switchLabel)
-  this.enterLexicalScope()
+  this.next();
+  node.discriminant = this.parseParenExpression();
+  node.cases = [];
+  this.expect(types.braceL);
+  this.labels.push(switchLabel);
+  this.enterLexicalScope();
 
   // Statements under must be grouped (by label) in SwitchCase
   // nodes. `cur` is used to keep the node that we are currently
   // adding statements to.
 
-  var cur
-  for (var sawDefault = false; this.type != tt.braceR;) {
-    if (this$1.type === tt._case || this$1.type === tt._default) {
-      var isCase = this$1.type === tt._case
-      if (cur) this$1.finishNode(cur, "SwitchCase")
-      node.cases.push(cur = this$1.startNode())
-      cur.consequent = []
-      this$1.next()
+  var cur;
+  for (var sawDefault = false; this.type != types.braceR;) {
+    if (this$1.type === types._case || this$1.type === types._default) {
+      var isCase = this$1.type === types._case;
+      if (cur) { this$1.finishNode(cur, "SwitchCase"); }
+      node.cases.push(cur = this$1.startNode());
+      cur.consequent = [];
+      this$1.next();
       if (isCase) {
-        cur.test = this$1.parseExpression()
+        cur.test = this$1.parseExpression();
       } else {
-        if (sawDefault) this$1.raiseRecoverable(this$1.lastTokStart, "Multiple default clauses")
-        sawDefault = true
-        cur.test = null
+        if (sawDefault) { this$1.raiseRecoverable(this$1.lastTokStart, "Multiple default clauses"); }
+        sawDefault = true;
+        cur.test = null;
       }
-      this$1.expect(tt.colon)
+      this$1.expect(types.colon);
     } else {
-      if (!cur) this$1.unexpected()
-      cur.consequent.push(this$1.parseStatement(true))
+      if (!cur) { this$1.unexpected(); }
+      cur.consequent.push(this$1.parseStatement(true));
     }
   }
-  this.exitLexicalScope()
-  if (cur) this.finishNode(cur, "SwitchCase")
-  this.next() // Closing brace
-  this.labels.pop()
+  this.exitLexicalScope();
+  if (cur) { this.finishNode(cur, "SwitchCase"); }
+  this.next(); // Closing brace
+  this.labels.pop();
   return this.finishNode(node, "SwitchStatement")
-}
+};
 
 pp$1.parseThrowStatement = function(node) {
-  this.next()
+  this.next();
   if (lineBreak.test(this.input.slice(this.lastTokEnd, this.start)))
-    this.raise(this.lastTokEnd, "Illegal newline after throw")
-  node.argument = this.parseExpression()
-  this.semicolon()
+    { this.raise(this.lastTokEnd, "Illegal newline after throw"); }
+  node.argument = this.parseExpression();
+  this.semicolon();
   return this.finishNode(node, "ThrowStatement")
-}
+};
 
 // Reused empty array added for node fields that are always empty.
 
-var empty = []
+var empty = [];
 
 pp$1.parseTryStatement = function(node) {
-  this.next()
-  node.block = this.parseBlock()
-  node.handler = null
-  if (this.type === tt._catch) {
-    var clause = this.startNode()
-    this.next()
-    this.expect(tt.parenL)
-    clause.param = this.parseBindingAtom()
-    this.enterLexicalScope()
-    this.checkLVal(clause.param, "let")
-    this.expect(tt.parenR)
-    clause.body = this.parseBlock(false)
-    this.exitLexicalScope()
-    node.handler = this.finishNode(clause, "CatchClause")
-  }
-  node.finalizer = this.eat(tt._finally) ? this.parseBlock() : null
+  this.next();
+  node.block = this.parseBlock();
+  node.handler = null;
+  if (this.type === types._catch) {
+    var clause = this.startNode();
+    this.next();
+    this.expect(types.parenL);
+    clause.param = this.parseBindingAtom();
+    this.enterLexicalScope();
+    this.checkLVal(clause.param, "let");
+    this.expect(types.parenR);
+    clause.body = this.parseBlock(false);
+    this.exitLexicalScope();
+    node.handler = this.finishNode(clause, "CatchClause");
+  }
+  node.finalizer = this.eat(types._finally) ? this.parseBlock() : null;
   if (!node.handler && !node.finalizer)
-    this.raise(node.start, "Missing catch or finally clause")
+    { this.raise(node.start, "Missing catch or finally clause"); }
   return this.finishNode(node, "TryStatement")
-}
+};
 
 pp$1.parseVarStatement = function(node, kind) {
-  this.next()
-  this.parseVar(node, false, kind)
-  this.semicolon()
+  this.next();
+  this.parseVar(node, false, kind);
+  this.semicolon();
   return this.finishNode(node, "VariableDeclaration")
-}
+};
 
 pp$1.parseWhileStatement = function(node) {
-  this.next()
-  node.test = this.parseParenExpression()
-  this.labels.push(loopLabel)
-  node.body = this.parseStatement(false)
-  this.labels.pop()
+  this.next();
+  node.test = this.parseParenExpression();
+  this.labels.push(loopLabel);
+  node.body = this.parseStatement(false);
+  this.labels.pop();
   return this.finishNode(node, "WhileStatement")
-}
+};
 
 pp$1.parseWithStatement = function(node) {
-  if (this.strict) this.raise(this.start, "'with' in strict mode")
-  this.next()
-  node.object = this.parseParenExpression()
-  node.body = this.parseStatement(false)
+  if (this.strict) { this.raise(this.start, "'with' in strict mode"); }
+  this.next();
+  node.object = this.parseParenExpression();
+  node.body = this.parseStatement(false);
   return this.finishNode(node, "WithStatement")
-}
+};
 
 pp$1.parseEmptyStatement = function(node) {
-  this.next()
+  this.next();
   return this.finishNode(node, "EmptyStatement")
-}
+};
 
 pp$1.parseLabeledStatement = function(node, maybeName, expr) {
   var this$1 = this;
 
-  for (var i = 0; i < this.labels.length; ++i)
-    if (this$1.labels[i].name === maybeName) this$1.raise(expr.start, "Label '" + maybeName + "' is already declared")
-  var kind = this.type.isLoop ? "loop" : this.type === tt._switch ? "switch" : null
-  for (var i$1 = this.labels.length - 1; i$1 >= 0; i$1--) {
-    var label = this$1.labels[i$1]
-    if (label.statementStart == node.start) {
-      label.statementStart = this$1.start
-      label.kind = kind
-    } else break
-  }
-  this.labels.push({name: maybeName, kind: kind, statementStart: this.start})
-  node.body = this.parseStatement(true)
+  for (var i$1 = 0, list = this$1.labels; i$1 < list.length; i$1 += 1)
+    {
+    var label = list[i$1];
+
+    if (label.name === maybeName)
+      { this$1.raise(expr.start, "Label '" + maybeName + "' is already declared");
+  } }
+  var kind = this.type.isLoop ? "loop" : this.type === types._switch ? "switch" : null;
+  for (var i = this.labels.length - 1; i >= 0; i--) {
+    var label$1 = this$1.labels[i];
+    if (label$1.statementStart == node.start) {
+      label$1.statementStart = this$1.start;
+      label$1.kind = kind;
+    } else { break }
+  }
+  this.labels.push({name: maybeName, kind: kind, statementStart: this.start});
+  node.body = this.parseStatement(true);
   if (node.body.type == "ClassDeclaration" ||
       node.body.type == "VariableDeclaration" && node.body.kind != "var" ||
       node.body.type == "FunctionDeclaration" && (this.strict || node.body.generator))
-    this.raiseRecoverable(node.body.start, "Invalid labeled declaration")
-  this.labels.pop()
-  node.label = expr
+    { this.raiseRecoverable(node.body.start, "Invalid labeled declaration"); }
+  this.labels.pop();
+  node.label = expr;
   return this.finishNode(node, "LabeledStatement")
-}
+};
 
 pp$1.parseExpressionStatement = function(node, expr) {
-  node.expression = expr
-  this.semicolon()
+  node.expression = expr;
+  this.semicolon();
   return this.finishNode(node, "ExpressionStatement")
-}
+};
 
 // Parse a semicolon-enclosed block of statements, handling `"use
 // strict"` declarations when `allowStrict` is true (used for
@@ -1054,129 +1066,129 @@ pp$1.parseBlock = function(createNewLexicalScope) {
   var this$1 = this;
   if ( createNewLexicalScope === void 0 ) createNewLexicalScope = true;
 
-  var node = this.startNode()
-  node.body = []
-  this.expect(tt.braceL)
+  var node = this.startNode();
+  node.body = [];
+  this.expect(types.braceL);
   if (createNewLexicalScope) {
-    this.enterLexicalScope()
+    this.enterLexicalScope();
   }
-  while (!this.eat(tt.braceR)) {
-    var stmt = this$1.parseStatement(true)
-    node.body.push(stmt)
+  while (!this.eat(types.braceR)) {
+    var stmt = this$1.parseStatement(true);
+    node.body.push(stmt);
   }
   if (createNewLexicalScope) {
-    this.exitLexicalScope()
+    this.exitLexicalScope();
   }
   return this.finishNode(node, "BlockStatement")
-}
+};
 
 // Parse a regular `for` loop. The disambiguation code in
 // `parseStatement` will already have parsed the init statement or
 // expression.
 
 pp$1.parseFor = function(node, init) {
-  node.init = init
-  this.expect(tt.semi)
-  node.test = this.type === tt.semi ? null : this.parseExpression()
-  this.expect(tt.semi)
-  node.update = this.type === tt.parenR ? null : this.parseExpression()
-  this.expect(tt.parenR)
-  this.exitLexicalScope()
-  node.body = this.parseStatement(false)
-  this.labels.pop()
+  node.init = init;
+  this.expect(types.semi);
+  node.test = this.type === types.semi ? null : this.parseExpression();
+  this.expect(types.semi);
+  node.update = this.type === types.parenR ? null : this.parseExpression();
+  this.expect(types.parenR);
+  this.exitLexicalScope();
+  node.body = this.parseStatement(false);
+  this.labels.pop();
   return this.finishNode(node, "ForStatement")
-}
+};
 
 // Parse a `for`/`in` and `for`/`of` loop, which are almost
 // same from parser's perspective.
 
 pp$1.parseForIn = function(node, init) {
-  var type = this.type === tt._in ? "ForInStatement" : "ForOfStatement"
-  this.next()
-  node.left = init
-  node.right = this.parseExpression()
-  this.expect(tt.parenR)
-  this.exitLexicalScope()
-  node.body = this.parseStatement(false)
-  this.labels.pop()
+  var type = this.type === types._in ? "ForInStatement" : "ForOfStatement";
+  this.next();
+  node.left = init;
+  node.right = this.parseExpression();
+  this.expect(types.parenR);
+  this.exitLexicalScope();
+  node.body = this.parseStatement(false);
+  this.labels.pop();
   return this.finishNode(node, type)
-}
+};
 
 // Parse a list of variable declarations.
 
 pp$1.parseVar = function(node, isFor, kind) {
   var this$1 = this;
 
-  node.declarations = []
-  node.kind = kind
+  node.declarations = [];
+  node.kind = kind;
   for (;;) {
-    var decl = this$1.startNode()
-    this$1.parseVarId(decl, kind)
-    if (this$1.eat(tt.eq)) {
-      decl.init = this$1.parseMaybeAssign(isFor)
-    } else if (kind === "const" && !(this$1.type === tt._in || (this$1.options.ecmaVersion >= 6 && this$1.isContextual("of")))) {
-      this$1.unexpected()
-    } else if (decl.id.type != "Identifier" && !(isFor && (this$1.type === tt._in || this$1.isContextual("of")))) {
-      this$1.raise(this$1.lastTokEnd, "Complex binding patterns require an initialization value")
+    var decl = this$1.startNode();
+    this$1.parseVarId(decl, kind);
+    if (this$1.eat(types.eq)) {
+      decl.init = this$1.parseMaybeAssign(isFor);
+    } else if (kind === "const" && !(this$1.type === types._in || (this$1.options.ecmaVersion >= 6 && this$1.isContextual("of")))) {
+      this$1.unexpected();
+    } else if (decl.id.type != "Identifier" && !(isFor && (this$1.type === types._in || this$1.isContextual("of")))) {
+      this$1.raise(this$1.lastTokEnd, "Complex binding patterns require an initialization value");
     } else {
-      decl.init = null
+      decl.init = null;
     }
-    node.declarations.push(this$1.finishNode(decl, "VariableDeclarator"))
-    if (!this$1.eat(tt.comma)) break
+    node.declarations.push(this$1.finishNode(decl, "VariableDeclarator"));
+    if (!this$1.eat(types.comma)) { break }
   }
   return node
-}
+};
 
 pp$1.parseVarId = function(decl, kind) {
-  decl.id = this.parseBindingAtom(kind)
-  this.checkLVal(decl.id, kind, false)
-}
+  decl.id = this.parseBindingAtom(kind);
+  this.checkLVal(decl.id, kind, false);
+};
 
 // Parse a function declaration or literal (depending on the
 // `isStatement` parameter).
 
 pp$1.parseFunction = function(node, isStatement, allowExpressionBody, isAsync) {
-  this.initFunction(node)
+  this.initFunction(node);
   if (this.options.ecmaVersion >= 6 && !isAsync)
-    node.generator = this.eat(tt.star)
+    { node.generator = this.eat(types.star); }
   if (this.options.ecmaVersion >= 8)
-    node.async = !!isAsync
+    { node.async = !!isAsync; }
 
   if (isStatement) {
-    node.id = isStatement === "nullableID" && this.type != tt.name ? null : this.parseIdent()
+    node.id = isStatement === "nullableID" && this.type != types.name ? null : this.parseIdent();
     if (node.id) {
-      this.checkLVal(node.id, "var")
+      this.checkLVal(node.id, "var");
     }
   }
 
   var oldInGen = this.inGenerator, oldInAsync = this.inAsync,
-      oldYieldPos = this.yieldPos, oldAwaitPos = this.awaitPos, oldInFunc = this.inFunction
-  this.inGenerator = node.generator
-  this.inAsync = node.async
-  this.yieldPos = 0
-  this.awaitPos = 0
-  this.inFunction = true
-  this.enterFunctionScope()
+      oldYieldPos = this.yieldPos, oldAwaitPos = this.awaitPos, oldInFunc = this.inFunction;
+  this.inGenerator = node.generator;
+  this.inAsync = node.async;
+  this.yieldPos = 0;
+  this.awaitPos = 0;
+  this.inFunction = true;
+  this.enterFunctionScope();
 
   if (!isStatement)
-    node.id = this.type == tt.name ? this.parseIdent() : null
+    { node.id = this.type == types.name ? this.parseIdent() : null; }
 
-  this.parseFunctionParams(node)
-  this.parseFunctionBody(node, allowExpressionBody)
+  this.parseFunctionParams(node);
+  this.parseFunctionBody(node, allowExpressionBody);
 
-  this.inGenerator = oldInGen
-  this.inAsync = oldInAsync
-  this.yieldPos = oldYieldPos
-  this.awaitPos = oldAwaitPos
-  this.inFunction = oldInFunc
+  this.inGenerator = oldInGen;
+  this.inAsync = oldInAsync;
+  this.yieldPos = oldYieldPos;
+  this.awaitPos = oldAwaitPos;
+  this.inFunction = oldInFunc;
   return this.finishNode(node, isStatement ? "FunctionDeclaration" : "FunctionExpression")
-}
+};
 
 pp$1.parseFunctionParams = function(node) {
-  this.expect(tt.parenL)
-  node.params = this.parseBindingList(tt.parenR, false, this.options.ecmaVersion >= 8, true)
-  this.checkYieldAwaitInDefaultParams()
-}
+  this.expect(types.parenL);
+  node.params = this.parseBindingList(types.parenR, false, this.options.ecmaVersion >= 8);
+  this.checkYieldAwaitInDefaultParams();
+};
 
 // Parse a class declaration or literal (depending on the
 // `isStatement` parameter).
@@ -1184,177 +1196,186 @@ pp$1.parseFunctionParams = function(node) {
 pp$1.parseClass = function(node, isStatement) {
   var this$1 = this;
 
-  this.next()
-
-  this.parseClassId(node, isStatement)
-  this.parseClassSuper(node)
-  var classBody = this.startNode()
-  var hadConstructor = false
-  classBody.body = []
-  this.expect(tt.braceL)
-  while (!this.eat(tt.braceR)) {
-    if (this$1.eat(tt.semi)) continue
-    var method = this$1.startNode()
-    var isGenerator = this$1.eat(tt.star)
-    var isAsync = false
-    var isMaybeStatic = this$1.type === tt.name && this$1.value === "static"
-    this$1.parsePropertyName(method)
-    method.static = isMaybeStatic && this$1.type !== tt.parenL
+  this.next();
+
+  this.parseClassId(node, isStatement);
+  this.parseClassSuper(node);
+  var classBody = this.startNode();
+  var hadConstructor = false;
+  classBody.body = [];
+  this.expect(types.braceL);
+  while (!this.eat(types.braceR)) {
+    if (this$1.eat(types.semi)) { continue }
+    var method = this$1.startNode();
+    var isGenerator = this$1.eat(types.star);
+    var isAsync = false;
+    var isMaybeStatic = this$1.type === types.name && this$1.value === "static";
+    this$1.parsePropertyName(method);
+    method.static = isMaybeStatic && this$1.type !== types.parenL;
     if (method.static) {
-      if (isGenerator) this$1.unexpected()
-      isGenerator = this$1.eat(tt.star)
-      this$1.parsePropertyName(method)
+      if (isGenerator) { this$1.unexpected(); }
+      isGenerator = this$1.eat(types.star);
+      this$1.parsePropertyName(method);
     }
     if (this$1.options.ecmaVersion >= 8 && !isGenerator && !method.computed &&
-        method.key.type === "Identifier" && method.key.name === "async" && this$1.type !== tt.parenL &&
+        method.key.type === "Identifier" && method.key.name === "async" && this$1.type !== types.parenL &&
         !this$1.canInsertSemicolon()) {
-      isAsync = true
-      this$1.parsePropertyName(method)
+      isAsync = true;
+      this$1.parsePropertyName(method);
     }
-    method.kind = "method"
-    var isGetSet = false
+    method.kind = "method";
+    var isGetSet = false;
     if (!method.computed) {
       var key = method.key;
-      if (!isGenerator && !isAsync && key.type === "Identifier" && this$1.type !== tt.parenL && (key.name === "get" || key.name === "set")) {
-        isGetSet = true
-        method.kind = key.name
-        key = this$1.parsePropertyName(method)
+      if (!isGenerator && !isAsync && key.type === "Identifier" && this$1.type !== types.parenL && (key.name === "get" || key.name === "set")) {
+        isGetSet = true;
+        method.kind = key.name;
+        key = this$1.parsePropertyName(method);
       }
       if (!method.static && (key.type === "Identifier" && key.name === "constructor" ||
           key.type === "Literal" && key.value === "constructor")) {
-        if (hadConstructor) this$1.raise(key.start, "Duplicate constructor in the same class")
-        if (isGetSet) this$1.raise(key.start, "Constructor can't have get/set modifier")
-        if (isGenerator) this$1.raise(key.start, "Constructor can't be a generator")
-        if (isAsync) this$1.raise(key.start, "Constructor can't be an async method")
-        method.kind = "constructor"
-        hadConstructor = true
+        if (hadConstructor) { this$1.raise(key.start, "Duplicate constructor in the same class"); }
+        if (isGetSet) { this$1.raise(key.start, "Constructor can't have get/set modifier"); }
+        if (isGenerator) { this$1.raise(key.start, "Constructor can't be a generator"); }
+        if (isAsync) { this$1.raise(key.start, "Constructor can't be an async method"); }
+        method.kind = "constructor";
+        hadConstructor = true;
       }
     }
-    this$1.parseClassMethod(classBody, method, isGenerator, isAsync)
+    this$1.parseClassMethod(classBody, method, isGenerator, isAsync);
     if (isGetSet) {
-      var paramCount = method.kind === "get" ? 0 : 1
+      var paramCount = method.kind === "get" ? 0 : 1;
       if (method.value.params.length !== paramCount) {
-        var start = method.value.start
+        var start = method.value.start;
         if (method.kind === "get")
-          this$1.raiseRecoverable(start, "getter should have no params")
+          { this$1.raiseRecoverable(start, "getter should have no params"); }
         else
-          this$1.raiseRecoverable(start, "setter should have exactly one param")
+          { this$1.raiseRecoverable(start, "setter should have exactly one param"); }
       } else {
         if (method.kind === "set" && method.value.params[0].type === "RestElement")
-          this$1.raiseRecoverable(method.value.params[0].start, "Setter cannot use rest params")
+          { this$1.raiseRecoverable(method.value.params[0].start, "Setter cannot use rest params"); }
       }
     }
   }
-  node.body = this.finishNode(classBody, "ClassBody")
+  node.body = this.finishNode(classBody, "ClassBody");
   return this.finishNode(node, isStatement ? "ClassDeclaration" : "ClassExpression")
-}
+};
 
 pp$1.parseClassMethod = function(classBody, method, isGenerator, isAsync) {
-  method.value = this.parseMethod(isGenerator, isAsync)
-  classBody.body.push(this.finishNode(method, "MethodDefinition"))
-}
+  method.value = this.parseMethod(isGenerator, isAsync);
+  classBody.body.push(this.finishNode(method, "MethodDefinition"));
+};
 
 pp$1.parseClassId = function(node, isStatement) {
-  node.id = this.type === tt.name ? this.parseIdent() : isStatement === true ? this.unexpected() : null
-}
+  node.id = this.type === types.name ? this.parseIdent() : isStatement === true ? this.unexpected() : null;
+};
 
 pp$1.parseClassSuper = function(node) {
-  node.superClass = this.eat(tt._extends) ? this.parseExprSubscripts() : null
-}
+  node.superClass = this.eat(types._extends) ? this.parseExprSubscripts() : null;
+};
 
 // Parses module export declaration.
 
 pp$1.parseExport = function(node, exports) {
   var this$1 = this;
 
-  this.next()
+  this.next();
   // export * from '...'
-  if (this.eat(tt.star)) {
-    this.expectContextual("from")
-    node.source = this.type === tt.string ? this.parseExprAtom() : this.unexpected()
-    this.semicolon()
+  if (this.eat(types.star)) {
+    this.expectContextual("from");
+    node.source = this.type === types.string ? this.parseExprAtom() : this.unexpected();
+    this.semicolon();
     return this.finishNode(node, "ExportAllDeclaration")
   }
-  if (this.eat(tt._default)) { // export default ...
-    this.checkExport(exports, "default", this.lastTokStart)
-    var isAsync
-    if (this.type === tt._function || (isAsync = this.isAsyncFunction())) {
-      var fNode = this.startNode()
-      this.next()
-      if (isAsync) this.next()
-      node.declaration = this.parseFunction(fNode, "nullableID", false, isAsync)
-    } else if (this.type === tt._class) {
-      var cNode = this.startNode()
-      node.declaration = this.parseClass(cNode, "nullableID")
+  if (this.eat(types._default)) { // export default ...
+    this.checkExport(exports, "default", this.lastTokStart);
+    var isAsync;
+    if (this.type === types._function || (isAsync = this.isAsyncFunction())) {
+      var fNode = this.startNode();
+      this.next();
+      if (isAsync) { this.next(); }
+      node.declaration = this.parseFunction(fNode, "nullableID", false, isAsync);
+    } else if (this.type === types._class) {
+      var cNode = this.startNode();
+      node.declaration = this.parseClass(cNode, "nullableID");
     } else {
-      node.declaration = this.parseMaybeAssign()
-      this.semicolon()
+      node.declaration = this.parseMaybeAssign();
+      this.semicolon();
     }
     return this.finishNode(node, "ExportDefaultDeclaration")
   }
   // export var|const|let|function|class ...
   if (this.shouldParseExportStatement()) {
-    node.declaration = this.parseStatement(true)
+    node.declaration = this.parseStatement(true);
     if (node.declaration.type === "VariableDeclaration")
-      this.checkVariableExport(exports, node.declaration.declarations)
+      { this.checkVariableExport(exports, node.declaration.declarations); }
     else
-      this.checkExport(exports, node.declaration.id.name, node.declaration.id.start)
-    node.specifiers = []
-    node.source = null
+      { this.checkExport(exports, node.declaration.id.name, node.declaration.id.start); }
+    node.specifiers = [];
+    node.source = null;
   } else { // export { x, y as z } [from '...']
-    node.declaration = null
-    node.specifiers = this.parseExportSpecifiers(exports)
+    node.declaration = null;
+    node.specifiers = this.parseExportSpecifiers(exports);
     if (this.eatContextual("from")) {
-      node.source = this.type === tt.string ? this.parseExprAtom() : this.unexpected()
+      node.source = this.type === types.string ? this.parseExprAtom() : this.unexpected();
     } else {
       // check for keywords used as local names
-      for (var i = 0; i < node.specifiers.length; i++) {
-        if (this$1.keywords.test(node.specifiers[i].local.name) || this$1.reservedWords.test(node.specifiers[i].local.name)) {
-          this$1.unexpected(node.specifiers[i].local.start)
-        }
+      for (var i = 0, list = node.specifiers; i < list.length; i += 1) {
+        var spec = list[i];
+
+        this$1.checkUnreserved(spec.local);
       }
 
-      node.source = null
+      node.source = null;
     }
-    this.semicolon()
+    this.semicolon();
   }
   return this.finishNode(node, "ExportNamedDeclaration")
-}
+};
 
 pp$1.checkExport = function(exports, name, pos) {
-  if (!exports) return
+  if (!exports) { return }
   if (has(exports, name))
-    this.raiseRecoverable(pos, "Duplicate export '" + name + "'")
-  exports[name] = true
-}
+    { this.raiseRecoverable(pos, "Duplicate export '" + name + "'"); }
+  exports[name] = true;
+};
 
 pp$1.checkPatternExport = function(exports, pat) {
   var this$1 = this;
 
-  var type = pat.type
+  var type = pat.type;
   if (type == "Identifier")
-    this.checkExport(exports, pat.name, pat.start)
+    { this.checkExport(exports, pat.name, pat.start); }
   else if (type == "ObjectPattern")
-    for (var i = 0; i < pat.properties.length; ++i)
-      this$1.checkPatternExport(exports, pat.properties[i].value)
+    { for (var i = 0, list = pat.properties; i < list.length; i += 1)
+      {
+        var prop = list[i];
+
+        this$1.checkPatternExport(exports, prop.value);
+      } }
   else if (type == "ArrayPattern")
-    for (var i$1 = 0; i$1 < pat.elements.length; ++i$1) {
-      var elt = pat.elements[i$1]
-      if (elt) this$1.checkPatternExport(exports, elt)
-    }
+    { for (var i$1 = 0, list$1 = pat.elements; i$1 < list$1.length; i$1 += 1) {
+      var elt = list$1[i$1];
+
+        if (elt) { this$1.checkPatternExport(exports, elt); }
+    } }
   else if (type == "AssignmentPattern")
-    this.checkPatternExport(exports, pat.left)
+    { this.checkPatternExport(exports, pat.left); }
   else if (type == "ParenthesizedExpression")
-    this.checkPatternExport(exports, pat.expression)
-}
+    { this.checkPatternExport(exports, pat.expression); }
+};
 
 pp$1.checkVariableExport = function(exports, decls) {
   var this$1 = this;
 
-  if (!exports) return
-  for (var i = 0; i < decls.length; i++)
-    this$1.checkPatternExport(exports, decls[i].id)
-}
+  if (!exports) { return }
+  for (var i = 0, list = decls; i < list.length; i += 1)
+    {
+    var decl = list[i];
+
+    this$1.checkPatternExport(exports, decl.id);
+  }
+};
 
 pp$1.shouldParseExportStatement = function() {
   return this.type.keyword === "var" ||
@@ -1363,94 +1384,93 @@ pp$1.shouldParseExportStatement = function() {
     this.type.keyword === "function" ||
     this.isLet() ||
     this.isAsyncFunction()
-}
+};
 
 // Parses a comma-separated list of module exports.
 
 pp$1.parseExportSpecifiers = function(exports) {
   var this$1 = this;
 
-  var nodes = [], first = true
+  var nodes = [], first = true;
   // export { x, y as z } [from '...']
-  this.expect(tt.braceL)
-  while (!this.eat(tt.braceR)) {
+  this.expect(types.braceL);
+  while (!this.eat(types.braceR)) {
     if (!first) {
-      this$1.expect(tt.comma)
-      if (this$1.afterTrailingComma(tt.braceR)) break
-    } else first = false
+      this$1.expect(types.comma);
+      if (this$1.afterTrailingComma(types.braceR)) { break }
+    } else { first = false; }
 
-    var node = this$1.startNode()
-    node.local = this$1.parseIdent(true)
-    node.exported = this$1.eatContextual("as") ? this$1.parseIdent(true) : node.local
-    this$1.checkExport(exports, node.exported.name, node.exported.start)
-    nodes.push(this$1.finishNode(node, "ExportSpecifier"))
+    var node = this$1.startNode();
+    node.local = this$1.parseIdent(true);
+    node.exported = this$1.eatContextual("as") ? this$1.parseIdent(true) : node.local;
+    this$1.checkExport(exports, node.exported.name, node.exported.start);
+    nodes.push(this$1.finishNode(node, "ExportSpecifier"));
   }
   return nodes
-}
+};
 
 // Parses import declaration.
 
 pp$1.parseImport = function(node) {
-  this.next()
+  this.next();
   // import '...'
-  if (this.type === tt.string) {
-    node.specifiers = empty
-    node.source = this.parseExprAtom()
+  if (this.type === types.string) {
+    node.specifiers = empty;
+    node.source = this.parseExprAtom();
   } else {
-    node.specifiers = this.parseImportSpecifiers()
-    this.expectContextual("from")
-    node.source = this.type === tt.string ? this.parseExprAtom() : this.unexpected()
+    node.specifiers = this.parseImportSpecifiers();
+    this.expectContextual("from");
+    node.source = this.type === types.string ? this.parseExprAtom() : this.unexpected();
   }
-  this.semicolon()
+  this.semicolon();
   return this.finishNode(node, "ImportDeclaration")
-}
+};
 
 // Parses a comma-separated list of module imports.
 
 pp$1.parseImportSpecifiers = function() {
   var this$1 = this;
 
-  var nodes = [], first = true
-  if (this.type === tt.name) {
+  var nodes = [], first = true;
+  if (this.type === types.name) {
     // import defaultObj, { x, y as z } from '...'
-    var node = this.startNode()
-    node.local = this.parseIdent()
-    this.checkLVal(node.local, "let")
-    nodes.push(this.finishNode(node, "ImportDefaultSpecifier"))
-    if (!this.eat(tt.comma)) return nodes
-  }
-  if (this.type === tt.star) {
-    var node$1 = this.startNode()
-    this.next()
-    this.expectContextual("as")
-    node$1.local = this.parseIdent()
-    this.checkLVal(node$1.local, "let")
-    nodes.push(this.finishNode(node$1, "ImportNamespaceSpecifier"))
+    var node = this.startNode();
+    node.local = this.parseIdent();
+    this.checkLVal(node.local, "let");
+    nodes.push(this.finishNode(node, "ImportDefaultSpecifier"));
+    if (!this.eat(types.comma)) { return nodes }
+  }
+  if (this.type === types.star) {
+    var node$1 = this.startNode();
+    this.next();
+    this.expectContextual("as");
+    node$1.local = this.parseIdent();
+    this.checkLVal(node$1.local, "let");
+    nodes.push(this.finishNode(node$1, "ImportNamespaceSpecifier"));
     return nodes
   }
-  this.expect(tt.braceL)
-  while (!this.eat(tt.braceR)) {
+  this.expect(types.braceL);
+  while (!this.eat(types.braceR)) {
     if (!first) {
-      this$1.expect(tt.comma)
-      if (this$1.afterTrailingComma(tt.braceR)) break
-    } else first = false
+      this$1.expect(types.comma);
+      if (this$1.afterTrailingComma(types.braceR)) { break }
+    } else { first = false; }
 
-    var node$2 = this$1.startNode()
-    node$2.imported = this$1.parseIdent(true)
+    var node$2 = this$1.startNode();
+    node$2.imported = this$1.parseIdent(true);
     if (this$1.eatContextual("as")) {
-      node$2.local = this$1.parseIdent()
+      node$2.local = this$1.parseIdent();
     } else {
-      node$2.local = node$2.imported
-      if (this$1.isKeyword(node$2.local.name)) this$1.unexpected(node$2.local.start)
-      if (this$1.reservedWordsStrict.test(node$2.local.name)) this$1.raiseRecoverable(node$2.local.start, "The keyword '" + node$2.local.name + "' is reserved")
+      this$1.checkUnreserved(node$2.imported);
+      node$2.local = node$2.imported;
     }
-    this$1.checkLVal(node$2.local, "let")
-    nodes.push(this$1.finishNode(node$2, "ImportSpecifier"))
+    this$1.checkLVal(node$2.local, "let");
+    nodes.push(this$1.finishNode(node$2, "ImportSpecifier"));
   }
   return nodes
-}
+};
 
-var pp$2 = Parser.prototype
+var pp$2 = Parser.prototype;
 
 // Convert existing expression atom to assignable pattern
 // if possible.
@@ -1462,7 +1482,7 @@ pp$2.toAssignable = function(node, isBinding) {
     switch (node.type) {
     case "Identifier":
       if (this.inAsync && node.name === "await")
-        this.raise(node.start, "Can not use 'await' as identifier inside an async function")
+        { this.raise(node.start, "Can not use 'await' as identifier inside an async function"); }
       break
 
     case "ObjectPattern":
@@ -1470,27 +1490,28 @@ pp$2.toAssignable = function(node, isBinding) {
       break
 
     case "ObjectExpression":
-      node.type = "ObjectPattern"
-      for (var i = 0; i < node.properties.length; i++) {
-        var prop = node.properties[i]
-        if (prop.kind !== "init") this$1.raise(prop.key.start, "Object pattern can't contain getter or setter")
-        this$1.toAssignable(prop.value, isBinding)
+      node.type = "ObjectPattern";
+      for (var i = 0, list = node.properties; i < list.length; i += 1) {
+        var prop = list[i];
+
+      if (prop.kind !== "init") { this$1.raise(prop.key.start, "Object pattern can't contain getter or setter"); }
+        this$1.toAssignable(prop.value, isBinding);
       }
       break
 
     case "ArrayExpression":
-      node.type = "ArrayPattern"
-      this.toAssignableList(node.elements, isBinding)
+      node.type = "ArrayPattern";
+      this.toAssignableList(node.elements, isBinding);
       break
 
     case "AssignmentExpression":
       if (node.operator === "=") {
-        node.type = "AssignmentPattern"
-        delete node.operator
-        this.toAssignable(node.left, isBinding)
+        node.type = "AssignmentPattern";
+        delete node.operator;
+        this.toAssignable(node.left, isBinding);
         // falls through to AssignmentPattern
       } else {
-        this.raise(node.left.end, "Only '=' operator can be used for specifying default value.")
+        this.raise(node.left.end, "Only '=' operator can be used for specifying default value.");
         break
       }
 
@@ -1498,131 +1519,131 @@ pp$2.toAssignable = function(node, isBinding) {
       break
 
     case "ParenthesizedExpression":
-      node.expression = this.toAssignable(node.expression, isBinding)
+      this.toAssignable(node.expression, isBinding);
       break
 
     case "MemberExpression":
-      if (!isBinding) break
+      if (!isBinding) { break }
 
     default:
-      this.raise(node.start, "Assigning to rvalue")
+      this.raise(node.start, "Assigning to rvalue");
     }
   }
   return node
-}
+};
 
 // Convert list of expression atoms to binding list.
 
 pp$2.toAssignableList = function(exprList, isBinding) {
   var this$1 = this;
 
-  var end = exprList.length
+  var end = exprList.length;
   if (end) {
-    var last = exprList[end - 1]
+    var last = exprList[end - 1];
     if (last && last.type == "RestElement") {
-      --end
+      --end;
     } else if (last && last.type == "SpreadElement") {
-      last.type = "RestElement"
-      var arg = last.argument
-      this.toAssignable(arg, isBinding)
-      if (arg.type !== "Identifier" && arg.type !== "MemberExpression" && arg.type !== "ArrayPattern")
-        this.unexpected(arg.start)
-      --end
+      last.type = "RestElement";
+      var arg = last.argument;
+      this.toAssignable(arg, isBinding);
+      --end;
     }
 
-    if (isBinding && last && last.type === "RestElement" && last.argument.type !== "Identifier")
-      this.unexpected(last.argument.start)
+    if (this.options.ecmaVersion === 6 && isBinding && last && last.type === "RestElement" && last.argument.type !== "Identifier")
+      { this.unexpected(last.argument.start); }
   }
   for (var i = 0; i < end; i++) {
-    var elt = exprList[i]
-    if (elt) this$1.toAssignable(elt, isBinding)
+    var elt = exprList[i];
+    if (elt) { this$1.toAssignable(elt, isBinding); }
   }
   return exprList
-}
+};
 
 // Parses spread element.
 
 pp$2.parseSpread = function(refDestructuringErrors) {
-  var node = this.startNode()
-  this.next()
-  node.argument = this.parseMaybeAssign(false, refDestructuringErrors)
+  var node = this.startNode();
+  this.next();
+  node.argument = this.parseMaybeAssign(false, refDestructuringErrors);
   return this.finishNode(node, "SpreadElement")
-}
+};
 
-pp$2.parseRest = function(allowNonIdent) {
-  var node = this.startNode()
-  this.next()
+pp$2.parseRestBinding = function() {
+  var node = this.startNode();
+  this.next();
 
   // RestElement inside of a function parameter must be an identifier
-  if (allowNonIdent) node.argument = this.type === tt.name ? this.parseIdent() : this.unexpected()
-  else node.argument = this.type === tt.name || this.type === tt.bracketL ? this.parseBindingAtom() : this.unexpected()
+  if (this.options.ecmaVersion === 6 && this.type !== types.name)
+    { this.unexpected(); }
+
+  node.argument = this.parseBindingAtom();
 
   return this.finishNode(node, "RestElement")
-}
+};
 
 // Parses lvalue (assignable) atom.
 
 pp$2.parseBindingAtom = function() {
-  if (this.options.ecmaVersion < 6) return this.parseIdent()
+  if (this.options.ecmaVersion < 6) { return this.parseIdent() }
   switch (this.type) {
-  case tt.name:
+  case types.name:
     return this.parseIdent()
 
-  case tt.bracketL:
-    var node = this.startNode()
-    this.next()
-    node.elements = this.parseBindingList(tt.bracketR, true, true)
+  case types.bracketL:
+    var node = this.startNode();
+    this.next();
+    node.elements = this.parseBindingList(types.bracketR, true, true);
     return this.finishNode(node, "ArrayPattern")
 
-  case tt.braceL:
+  case types.braceL:
     return this.parseObj(true)
 
   default:
-    this.unexpected()
+    this.unexpected();
   }
-}
+};
 
-pp$2.parseBindingList = function(close, allowEmpty, allowTrailingComma, allowNonIdent) {
+pp$2.parseBindingList = function(close, allowEmpty, allowTrailingComma) {
   var this$1 = this;
 
-  var elts = [], first = true
+  var elts = [], first = true;
   while (!this.eat(close)) {
-    if (first) first = false
-    else this$1.expect(tt.comma)
-    if (allowEmpty && this$1.type === tt.comma) {
-      elts.push(null)
+    if (first) { first = false; }
+    else { this$1.expect(types.comma); }
+    if (allowEmpty && this$1.type === types.comma) {
+      elts.push(null);
     } else if (allowTrailingComma && this$1.afterTrailingComma(close)) {
       break
-    } else if (this$1.type === tt.ellipsis) {
-      var rest = this$1.parseRest(allowNonIdent)
-      this$1.parseBindingListItem(rest)
-      elts.push(rest)
-      if (this$1.type === tt.comma) this$1.raise(this$1.start, "Comma is not permitted after the rest element")
-      this$1.expect(close)
+    } else if (this$1.type === types.ellipsis) {
+      var rest = this$1.parseRestBinding();
+      this$1.parseBindingListItem(rest);
+      elts.push(rest);
+      if (this$1.type === types.comma) { this$1.raise(this$1.start, "Comma is not permitted after the rest element"); }
+      this$1.expect(close);
       break
     } else {
-      var elem = this$1.parseMaybeDefault(this$1.start, this$1.startLoc)
-      this$1.parseBindingListItem(elem)
-      elts.push(elem)
+      var elem = this$1.parseMaybeDefault(this$1.start, this$1.startLoc);
+      this$1.parseBindingListItem(elem);
+      elts.push(elem);
     }
   }
   return elts
-}
+};
 
 pp$2.parseBindingListItem = function(param) {
   return param
-}
+};
 
 // Parses assignment pattern around given atom if possible.
 
 pp$2.parseMaybeDefault = function(startPos, startLoc, left) {
-  left = left || this.parseBindingAtom()
-  if (this.options.ecmaVersion < 6 || !this.eat(tt.eq)) return left
-  var node = this.startNodeAt(startPos, startLoc)
-  node.left = left
-  node.right = this.parseMaybeAssign()
+  left = left || this.parseBindingAtom();
+  if (this.options.ecmaVersion < 6 || !this.eat(types.eq)) { return left }
+  var node = this.startNodeAt(startPos, startLoc);
+  node.left = left;
+  node.right = this.parseMaybeAssign();
   return this.finishNode(node, "AssignmentPattern")
-}
+};
 
 // Verify that a node is an lval — something that can be assigned
 // to.
@@ -1637,59 +1658,64 @@ pp$2.checkLVal = function(expr, bindingType, checkClashes) {
   switch (expr.type) {
   case "Identifier":
     if (this.strict && this.reservedWordsStrictBind.test(expr.name))
-      this.raiseRecoverable(expr.start, (bindingType ? "Binding " : "Assigning to ") + expr.name + " in strict mode")
+      { this.raiseRecoverable(expr.start, (bindingType ? "Binding " : "Assigning to ") + expr.name + " in strict mode"); }
     if (checkClashes) {
       if (has(checkClashes, expr.name))
-        this.raiseRecoverable(expr.start, "Argument name clash")
-      checkClashes[expr.name] = true
+        { this.raiseRecoverable(expr.start, "Argument name clash"); }
+      checkClashes[expr.name] = true;
     }
     if (bindingType && bindingType !== "none") {
       if (
         bindingType === "var" && !this.canDeclareVarName(expr.name) ||
         bindingType !== "var" && !this.canDeclareLexicalName(expr.name)
       ) {
-        this.raiseRecoverable(expr.start, ("Identifier '" + (expr.name) + "' has already been declared"))
+        this.raiseRecoverable(expr.start, ("Identifier '" + (expr.name) + "' has already been declared"));
       }
       if (bindingType === "var") {
-        this.declareVarName(expr.name)
+        this.declareVarName(expr.name);
       } else {
-        this.declareLexicalName(expr.name)
+        this.declareLexicalName(expr.name);
       }
     }
     break
 
   case "MemberExpression":
-    if (bindingType) this.raiseRecoverable(expr.start, (bindingType ? "Binding" : "Assigning to") + " member expression")
+    if (bindingType) { this.raiseRecoverable(expr.start, (bindingType ? "Binding" : "Assigning to") + " member expression"); }
     break
 
   case "ObjectPattern":
-    for (var i = 0; i < expr.properties.length; i++)
-      this$1.checkLVal(expr.properties[i].value, bindingType, checkClashes)
+    for (var i = 0, list = expr.properties; i < list.length; i += 1)
+      {
+    var prop = list[i];
+
+    this$1.checkLVal(prop.value, bindingType, checkClashes);
+  }
     break
 
   case "ArrayPattern":
-    for (var i$1 = 0; i$1 < expr.elements.length; i$1++) {
-      var elem = expr.elements[i$1]
-      if (elem) this$1.checkLVal(elem, bindingType, checkClashes)
+    for (var i$1 = 0, list$1 = expr.elements; i$1 < list$1.length; i$1 += 1) {
+      var elem = list$1[i$1];
+
+    if (elem) { this$1.checkLVal(elem, bindingType, checkClashes); }
     }
     break
 
   case "AssignmentPattern":
-    this.checkLVal(expr.left, bindingType, checkClashes)
+    this.checkLVal(expr.left, bindingType, checkClashes);
     break
 
   case "RestElement":
-    this.checkLVal(expr.argument, bindingType, checkClashes)
+    this.checkLVal(expr.argument, bindingType, checkClashes);
     break
 
   case "ParenthesizedExpression":
-    this.checkLVal(expr.expression, bindingType, checkClashes)
+    this.checkLVal(expr.expression, bindingType, checkClashes);
     break
 
   default:
-    this.raise(expr.start, (bindingType ? "Binding" : "Assigning to") + " rvalue")
+    this.raise(expr.start, (bindingType ? "Binding" : "Assigning to") + " rvalue");
   }
-}
+};
 
 // A recursive descent parser operates by defining functions for all
 // syntactic elements, and recursively calling those, each function
@@ -1709,7 +1735,7 @@ pp$2.checkLVal = function(expr, bindingType, checkClashes) {
 //
 // [opp]: http://en.wikipedia.org/wiki/Operator-precedence_parser
 
-var pp$3 = Parser.prototype
+var pp$3 = Parser.prototype;
 
 // Check if property name clashes with already added.
 // Object/class getters and setters are not allowed to clash —
@@ -1718,9 +1744,9 @@ var pp$3 = Parser.prototype
 
 pp$3.checkPropClash = function(prop, propHash) {
   if (this.options.ecmaVersion >= 6 && (prop.computed || prop.method || prop.shorthand))
-    return
+    { return }
   var key = prop.key;
-  var name
+  var name;
   switch (key.type) {
   case "Identifier": name = key.name; break
   case "Literal": name = String(key.value); break
@@ -1729,31 +1755,31 @@ pp$3.checkPropClash = function(prop, propHash) {
   var kind = prop.kind;
   if (this.options.ecmaVersion >= 6) {
     if (name === "__proto__" && kind === "init") {
-      if (propHash.proto) this.raiseRecoverable(key.start, "Redefinition of __proto__ property")
-      propHash.proto = true
+      if (propHash.proto) { this.raiseRecoverable(key.start, "Redefinition of __proto__ property"); }
+      propHash.proto = true;
     }
     return
   }
-  name = "$" + name
-  var other = propHash[name]
+  name = "$" + name;
+  var other = propHash[name];
   if (other) {
-    var redefinition
+    var redefinition;
     if (kind === "init") {
-      redefinition = this.strict && other.init || other.get || other.set
+      redefinition = this.strict && other.init || other.get || other.set;
     } else {
-      redefinition = other.init || other[kind]
+      redefinition = other.init || other[kind];
     }
     if (redefinition)
-      this.raiseRecoverable(key.start, "Redefinition of property")
+      { this.raiseRecoverable(key.start, "Redefinition of property"); }
   } else {
     other = propHash[name] = {
       init: false,
       get: false,
       set: false
-    }
+    };
   }
-  other[kind] = true
-}
+  other[kind] = true;
+};
 
 // ### Expression parsing
 
@@ -1773,82 +1799,82 @@ pp$3.checkPropClash = function(prop, propHash) {
 pp$3.parseExpression = function(noIn, refDestructuringErrors) {
   var this$1 = this;
 
-  var startPos = this.start, startLoc = this.startLoc
-  var expr = this.parseMaybeAssign(noIn, refDestructuringErrors)
-  if (this.type === tt.comma) {
-    var node = this.startNodeAt(startPos, startLoc)
-    node.expressions = [expr]
-    while (this.eat(tt.comma)) node.expressions.push(this$1.parseMaybeAssign(noIn, refDestructuringErrors))
+  var startPos = this.start, startLoc = this.startLoc;
+  var expr = this.parseMaybeAssign(noIn, refDestructuringErrors);
+  if (this.type === types.comma) {
+    var node = this.startNodeAt(startPos, startLoc);
+    node.expressions = [expr];
+    while (this.eat(types.comma)) { node.expressions.push(this$1.parseMaybeAssign(noIn, refDestructuringErrors)); }
     return this.finishNode(node, "SequenceExpression")
   }
   return expr
-}
+};
 
 // Parse an assignment expression. This includes applications of
 // operators like `+=`.
 
 pp$3.parseMaybeAssign = function(noIn, refDestructuringErrors, afterLeftParse) {
-  if (this.inGenerator && this.isContextual("yield")) return this.parseYield()
+  if (this.inGenerator && this.isContextual("yield")) { return this.parseYield() }
 
-  var ownDestructuringErrors = false, oldParenAssign = -1, oldTrailingComma = -1
+  var ownDestructuringErrors = false, oldParenAssign = -1, oldTrailingComma = -1;
   if (refDestructuringErrors) {
-    oldParenAssign = refDestructuringErrors.parenthesizedAssign
-    oldTrailingComma = refDestructuringErrors.trailingComma
-    refDestructuringErrors.parenthesizedAssign = refDestructuringErrors.trailingComma = -1
+    oldParenAssign = refDestructuringErrors.parenthesizedAssign;
+    oldTrailingComma = refDestructuringErrors.trailingComma;
+    refDestructuringErrors.parenthesizedAssign = refDestructuringErrors.trailingComma = -1;
   } else {
-    refDestructuringErrors = new DestructuringErrors
-    ownDestructuringErrors = true
+    refDestructuringErrors = new DestructuringErrors;
+    ownDestructuringErrors = true;
   }
 
-  var startPos = this.start, startLoc = this.startLoc
-  if (this.type == tt.parenL || this.type == tt.name)
-    this.potentialArrowAt = this.start
-  var left = this.parseMaybeConditional(noIn, refDestructuringErrors)
-  if (afterLeftParse) left = afterLeftParse.call(this, left, startPos, startLoc)
+  var startPos = this.start, startLoc = this.startLoc;
+  if (this.type == types.parenL || this.type == types.name)
+    { this.potentialArrowAt = this.start; }
+  var left = this.parseMaybeConditional(noIn, refDestructuringErrors);
+  if (afterLeftParse) { left = afterLeftParse.call(this, left, startPos, startLoc); }
   if (this.type.isAssign) {
-    this.checkPatternErrors(refDestructuringErrors, true)
-    if (!ownDestructuringErrors) DestructuringErrors.call(refDestructuringErrors)
-    var node = this.startNodeAt(startPos, startLoc)
-    node.operator = this.value
-    node.left = this.type === tt.eq ? this.toAssignable(left) : left
-    refDestructuringErrors.shorthandAssign = -1 // reset because shorthand default was used correctly
-    this.checkLVal(left)
-    this.next()
-    node.right = this.parseMaybeAssign(noIn)
+    this.checkPatternErrors(refDestructuringErrors, true);
+    if (!ownDestructuringErrors) { DestructuringErrors.call(refDestructuringErrors); }
+    var node = this.startNodeAt(startPos, startLoc);
+    node.operator = this.value;
+    node.left = this.type === types.eq ? this.toAssignable(left) : left;
+    refDestructuringErrors.shorthandAssign = -1; // reset because shorthand default was used correctly
+    this.checkLVal(left);
+    this.next();
+    node.right = this.parseMaybeAssign(noIn);
     return this.finishNode(node, "AssignmentExpression")
   } else {
-    if (ownDestructuringErrors) this.checkExpressionErrors(refDestructuringErrors, true)
+    if (ownDestructuringErrors) { this.checkExpressionErrors(refDestructuringErrors, true); }
   }
-  if (oldParenAssign > -1) refDestructuringErrors.parenthesizedAssign = oldParenAssign
-  if (oldTrailingComma > -1) refDestructuringErrors.trailingComma = oldTrailingComma
+  if (oldParenAssign > -1) { refDestructuringErrors.parenthesizedAssign = oldParenAssign; }
+  if (oldTrailingComma > -1) { refDestructuringErrors.trailingComma = oldTrailingComma; }
   return left
-}
+};
 
 // Parse a ternary conditional (`?:`) operator.
 
 pp$3.parseMaybeConditional = function(noIn, refDestructuringErrors) {
-  var startPos = this.start, startLoc = this.startLoc
-  var expr = this.parseExprOps(noIn, refDestructuringErrors)
-  if (this.checkExpressionErrors(refDestructuringErrors)) return expr
-  if (this.eat(tt.question)) {
-    var node = this.startNodeAt(startPos, startLoc)
-    node.test = expr
-    node.consequent = this.parseMaybeAssign()
-    this.expect(tt.colon)
-    node.alternate = this.parseMaybeAssign(noIn)
+  var startPos = this.start, startLoc = this.startLoc;
+  var expr = this.parseExprOps(noIn, refDestructuringErrors);
+  if (this.checkExpressionErrors(refDestructuringErrors)) { return expr }
+  if (this.eat(types.question)) {
+    var node = this.startNodeAt(startPos, startLoc);
+    node.test = expr;
+    node.consequent = this.parseMaybeAssign();
+    this.expect(types.colon);
+    node.alternate = this.parseMaybeAssign(noIn);
     return this.finishNode(node, "ConditionalExpression")
   }
   return expr
-}
+};
 
 // Start the precedence parser.
 
 pp$3.parseExprOps = function(noIn, refDestructuringErrors) {
-  var startPos = this.start, startLoc = this.startLoc
-  var expr = this.parseMaybeUnary(refDestructuringErrors, false)
-  if (this.checkExpressionErrors(refDestructuringErrors)) return expr
+  var startPos = this.start, startLoc = this.startLoc;
+  var expr = this.parseMaybeUnary(refDestructuringErrors, false);
+  if (this.checkExpressionErrors(refDestructuringErrors)) { return expr }
   return expr.start == startPos && expr.type === "ArrowFunctionExpression" ? expr : this.parseExprOp(expr, startPos, startLoc, -1, noIn)
-}
+};
 
 // Parse binary operators with the operator precedence parsing
 // algorithm. `left` is the left-hand side of the operator.
@@ -1857,128 +1883,128 @@ pp$3.parseExprOps = function(noIn, refDestructuringErrors) {
 // operator that has a lower precedence than the set it is parsing.
 
 pp$3.parseExprOp = function(left, leftStartPos, leftStartLoc, minPrec, noIn) {
-  var prec = this.type.binop
-  if (prec != null && (!noIn || this.type !== tt._in)) {
+  var prec = this.type.binop;
+  if (prec != null && (!noIn || this.type !== types._in)) {
     if (prec > minPrec) {
-      var logical = this.type === tt.logicalOR || this.type === tt.logicalAND
-      var op = this.value
-      this.next()
-      var startPos = this.start, startLoc = this.startLoc
-      var right = this.parseExprOp(this.parseMaybeUnary(null, false), startPos, startLoc, prec, noIn)
-      var node = this.buildBinary(leftStartPos, leftStartLoc, left, right, op, logical)
+      var logical = this.type === types.logicalOR || this.type === types.logicalAND;
+      var op = this.value;
+      this.next();
+      var startPos = this.start, startLoc = this.startLoc;
+      var right = this.parseExprOp(this.parseMaybeUnary(null, false), startPos, startLoc, prec, noIn);
+      var node = this.buildBinary(leftStartPos, leftStartLoc, left, right, op, logical);
       return this.parseExprOp(node, leftStartPos, leftStartLoc, minPrec, noIn)
     }
   }
   return left
-}
+};
 
 pp$3.buildBinary = function(startPos, startLoc, left, right, op, logical) {
-  var node = this.startNodeAt(startPos, startLoc)
-  node.left = left
-  node.operator = op
-  node.right = right
+  var node = this.startNodeAt(startPos, startLoc);
+  node.left = left;
+  node.operator = op;
+  node.right = right;
   return this.finishNode(node, logical ? "LogicalExpression" : "BinaryExpression")
-}
+};
 
 // Parse unary operators, both prefix and postfix.
 
 pp$3.parseMaybeUnary = function(refDestructuringErrors, sawUnary) {
   var this$1 = this;
 
-  var startPos = this.start, startLoc = this.startLoc, expr
+  var startPos = this.start, startLoc = this.startLoc, expr;
   if (this.inAsync && this.isContextual("await")) {
-    expr = this.parseAwait(refDestructuringErrors)
-    sawUnary = true
+    expr = this.parseAwait(refDestructuringErrors);
+    sawUnary = true;
   } else if (this.type.prefix) {
-    var node = this.startNode(), update = this.type === tt.incDec
-    node.operator = this.value
-    node.prefix = true
-    this.next()
-    node.argument = this.parseMaybeUnary(null, true)
-    this.checkExpressionErrors(refDestructuringErrors, true)
-    if (update) this.checkLVal(node.argument)
+    var node = this.startNode(), update = this.type === types.incDec;
+    node.operator = this.value;
+    node.prefix = true;
+    this.next();
+    node.argument = this.parseMaybeUnary(null, true);
+    this.checkExpressionErrors(refDestructuringErrors, true);
+    if (update) { this.checkLVal(node.argument); }
     else if (this.strict && node.operator === "delete" &&
              node.argument.type === "Identifier")
-      this.raiseRecoverable(node.start, "Deleting local variable in strict mode")
-    else sawUnary = true
-    expr = this.finishNode(node, update ? "UpdateExpression" : "UnaryExpression")
+      { this.raiseRecoverable(node.start, "Deleting local variable in strict mode"); }
+    else { sawUnary = true; }
+    expr = this.finishNode(node, update ? "UpdateExpression" : "UnaryExpression");
   } else {
-    expr = this.parseExprSubscripts(refDestructuringErrors)
-    if (this.checkExpressionErrors(refDestructuringErrors)) return expr
+    expr = this.parseExprSubscripts(refDestructuringErrors);
+    if (this.checkExpressionErrors(refDestructuringErrors)) { return expr }
     while (this.type.postfix && !this.canInsertSemicolon()) {
-      var node$1 = this$1.startNodeAt(startPos, startLoc)
-      node$1.operator = this$1.value
-      node$1.prefix = false
-      node$1.argument = expr
-      this$1.checkLVal(expr)
-      this$1.next()
-      expr = this$1.finishNode(node$1, "UpdateExpression")
+      var node$1 = this$1.startNodeAt(startPos, startLoc);
+      node$1.operator = this$1.value;
+      node$1.prefix = false;
+      node$1.argument = expr;
+      this$1.checkLVal(expr);
+      this$1.next();
+      expr = this$1.finishNode(node$1, "UpdateExpression");
     }
   }
 
-  if (!sawUnary && this.eat(tt.starstar))
-    return this.buildBinary(startPos, startLoc, expr, this.parseMaybeUnary(null, false), "**", false)
+  if (!sawUnary && this.eat(types.starstar))
+    { return this.buildBinary(startPos, startLoc, expr, this.parseMaybeUnary(null, false), "**", false) }
   else
-    return expr
-}
+    { return expr }
+};
 
 // Parse call, dot, and `[]`-subscript expressions.
 
 pp$3.parseExprSubscripts = function(refDestructuringErrors) {
-  var startPos = this.start, startLoc = this.startLoc
-  var expr = this.parseExprAtom(refDestructuringErrors)
-  var skipArrowSubscripts = expr.type === "ArrowFunctionExpression" && this.input.slice(this.lastTokStart, this.lastTokEnd) !== ")"
-  if (this.checkExpressionErrors(refDestructuringErrors) || skipArrowSubscripts) return expr
-  var result = this.parseSubscripts(expr, startPos, startLoc)
+  var startPos = this.start, startLoc = this.startLoc;
+  var expr = this.parseExprAtom(refDestructuringErrors);
+  var skipArrowSubscripts = expr.type === "ArrowFunctionExpression" && this.input.slice(this.lastTokStart, this.lastTokEnd) !== ")";
+  if (this.checkExpressionErrors(refDestructuringErrors) || skipArrowSubscripts) { return expr }
+  var result = this.parseSubscripts(expr, startPos, startLoc);
   if (refDestructuringErrors && result.type === "MemberExpression") {
-    if (refDestructuringErrors.parenthesizedAssign >= result.start) refDestructuringErrors.parenthesizedAssign = -1
-    if (refDestructuringErrors.parenthesizedBind >= result.start) refDestructuringErrors.parenthesizedBind = -1
+    if (refDestructuringErrors.parenthesizedAssign >= result.start) { refDestructuringErrors.parenthesizedAssign = -1; }
+    if (refDestructuringErrors.parenthesizedBind >= result.start) { refDestructuringErrors.parenthesizedBind = -1; }
   }
   return result
-}
+};
 
 pp$3.parseSubscripts = function(base, startPos, startLoc, noCalls) {
   var this$1 = this;
 
   var maybeAsyncArrow = this.options.ecmaVersion >= 8 && base.type === "Identifier" && base.name === "async" &&
-      this.lastTokEnd == base.end && !this.canInsertSemicolon()
-  for (var computed;;) {
-    if ((computed = this$1.eat(tt.bracketL)) || this$1.eat(tt.dot)) {
-      var node = this$1.startNodeAt(startPos, startLoc)
-      node.object = base
-      node.property = computed ? this$1.parseExpression() : this$1.parseIdent(true)
-      node.computed = !!computed
-      if (computed) this$1.expect(tt.bracketR)
-      base = this$1.finishNode(node, "MemberExpression")
-    } else if (!noCalls && this$1.eat(tt.parenL)) {
-      var refDestructuringErrors = new DestructuringErrors, oldYieldPos = this$1.yieldPos, oldAwaitPos = this$1.awaitPos
-      this$1.yieldPos = 0
-      this$1.awaitPos = 0
-      var exprList = this$1.parseExprList(tt.parenR, this$1.options.ecmaVersion >= 8, false, refDestructuringErrors)
-      if (maybeAsyncArrow && !this$1.canInsertSemicolon() && this$1.eat(tt.arrow)) {
-        this$1.checkPatternErrors(refDestructuringErrors, false)
-        this$1.checkYieldAwaitInDefaultParams()
-        this$1.yieldPos = oldYieldPos
-        this$1.awaitPos = oldAwaitPos
+      this.lastTokEnd == base.end && !this.canInsertSemicolon();
+  for (var computed = (void 0);;) {
+    if ((computed = this$1.eat(types.bracketL)) || this$1.eat(types.dot)) {
+      var node = this$1.startNodeAt(startPos, startLoc);
+      node.object = base;
+      node.property = computed ? this$1.parseExpression() : this$1.parseIdent(true);
+      node.computed = !!computed;
+      if (computed) { this$1.expect(types.bracketR); }
+      base = this$1.finishNode(node, "MemberExpression");
+    } else if (!noCalls && this$1.eat(types.parenL)) {
+      var refDestructuringErrors = new DestructuringErrors, oldYieldPos = this$1.yieldPos, oldAwaitPos = this$1.awaitPos;
+      this$1.yieldPos = 0;
+      this$1.awaitPos = 0;
+      var exprList = this$1.parseExprList(types.parenR, this$1.options.ecmaVersion >= 8, false, refDestructuringErrors);
+      if (maybeAsyncArrow && !this$1.canInsertSemicolon() && this$1.eat(types.arrow)) {
+        this$1.checkPatternErrors(refDestructuringErrors, false);
+        this$1.checkYieldAwaitInDefaultParams();
+        this$1.yieldPos = oldYieldPos;
+        this$1.awaitPos = oldAwaitPos;
         return this$1.parseArrowExpression(this$1.startNodeAt(startPos, startLoc), exprList, true)
       }
-      this$1.checkExpressionErrors(refDestructuringErrors, true)
-      this$1.yieldPos = oldYieldPos || this$1.yieldPos
-      this$1.awaitPos = oldAwaitPos || this$1.awaitPos
-      var node$1 = this$1.startNodeAt(startPos, startLoc)
-      node$1.callee = base
-      node$1.arguments = exprList
-      base = this$1.finishNode(node$1, "CallExpression")
-    } else if (this$1.type === tt.backQuote) {
-      var node$2 = this$1.startNodeAt(startPos, startLoc)
-      node$2.tag = base
-      node$2.quasi = this$1.parseTemplate()
-      base = this$1.finishNode(node$2, "TaggedTemplateExpression")
+      this$1.checkExpressionErrors(refDestructuringErrors, true);
+      this$1.yieldPos = oldYieldPos || this$1.yieldPos;
+      this$1.awaitPos = oldAwaitPos || this$1.awaitPos;
+      var node$1 = this$1.startNodeAt(startPos, startLoc);
+      node$1.callee = base;
+      node$1.arguments = exprList;
+      base = this$1.finishNode(node$1, "CallExpression");
+    } else if (this$1.type === types.backQuote) {
+      var node$2 = this$1.startNodeAt(startPos, startLoc);
+      node$2.tag = base;
+      node$2.quasi = this$1.parseTemplate({isTagged: true});
+      base = this$1.finishNode(node$2, "TaggedTemplateExpression");
     } else {
       return base
     }
   }
-}
+};
 
 // Parse an atomic expression — either a single token that is an
 // expression, an expression started by a keyword like `function` or
@@ -1986,178 +2012,178 @@ pp$3.parseSubscripts = function(base, startPos, startLoc, noCalls) {
 // or `{}`.
 
 pp$3.parseExprAtom = function(refDestructuringErrors) {
-  var node, canBeArrow = this.potentialArrowAt == this.start
+  var node, canBeArrow = this.potentialArrowAt == this.start;
   switch (this.type) {
-  case tt._super:
+  case types._super:
     if (!this.inFunction)
-      this.raise(this.start, "'super' outside of function or class")
+      { this.raise(this.start, "'super' outside of function or class"); }
 
-  case tt._this:
-    var type = this.type === tt._this ? "ThisExpression" : "Super"
-    node = this.startNode()
-    this.next()
+  case types._this:
+    var type = this.type === types._this ? "ThisExpression" : "Super";
+    node = this.startNode();
+    this.next();
     return this.finishNode(node, type)
 
-  case tt.name:
-    var startPos = this.start, startLoc = this.startLoc
-    var id = this.parseIdent(this.type !== tt.name)
-    if (this.options.ecmaVersion >= 8 && id.name === "async" && !this.canInsertSemicolon() && this.eat(tt._function))
-      return this.parseFunction(this.startNodeAt(startPos, startLoc), false, false, true)
+  case types.name:
+    var startPos = this.start, startLoc = this.startLoc;
+    var id = this.parseIdent(this.type !== types.name);
+    if (this.options.ecmaVersion >= 8 && id.name === "async" && !this.canInsertSemicolon() && this.eat(types._function))
+      { return this.parseFunction(this.startNodeAt(startPos, startLoc), false, false, true) }
     if (canBeArrow && !this.canInsertSemicolon()) {
-      if (this.eat(tt.arrow))
-        return this.parseArrowExpression(this.startNodeAt(startPos, startLoc), [id], false)
-      if (this.options.ecmaVersion >= 8 && id.name === "async" && this.type === tt.name) {
-        id = this.parseIdent()
-        if (this.canInsertSemicolon() || !this.eat(tt.arrow))
-          this.unexpected()
+      if (this.eat(types.arrow))
+        { return this.parseArrowExpression(this.startNodeAt(startPos, startLoc), [id], false) }
+      if (this.options.ecmaVersion >= 8 && id.name === "async" && this.type === types.name) {
+        id = this.parseIdent();
+        if (this.canInsertSemicolon() || !this.eat(types.arrow))
+          { this.unexpected(); }
         return this.parseArrowExpression(this.startNodeAt(startPos, startLoc), [id], true)
       }
     }
     return id
 
-  case tt.regexp:
-    var value = this.value
-    node = this.parseLiteral(value.value)
-    node.regex = {pattern: value.pattern, flags: value.flags}
+  case types.regexp:
+    var value = this.value;
+    node = this.parseLiteral(value.value);
+    node.regex = {pattern: value.pattern, flags: value.flags};
     return node
 
-  case tt.num: case tt.string:
+  case types.num: case types.string:
     return this.parseLiteral(this.value)
 
-  case tt._null: case tt._true: case tt._false:
-    node = this.startNode()
-    node.value = this.type === tt._null ? null : this.type === tt._true
-    node.raw = this.type.keyword
-    this.next()
+  case types._null: case types._true: case types._false:
+    node = this.startNode();
+    node.value = this.type === types._null ? null : this.type === types._true;
+    node.raw = this.type.keyword;
+    this.next();
     return this.finishNode(node, "Literal")
 
-  case tt.parenL:
-    var start = this.start, expr = this.parseParenAndDistinguishExpression(canBeArrow)
+  case types.parenL:
+    var start = this.start, expr = this.parseParenAndDistinguishExpression(canBeArrow);
     if (refDestructuringErrors) {
       if (refDestructuringErrors.parenthesizedAssign < 0 && !this.isSimpleAssignTarget(expr))
-        refDestructuringErrors.parenthesizedAssign = start
+        { refDestructuringErrors.parenthesizedAssign = start; }
       if (refDestructuringErrors.parenthesizedBind < 0)
-        refDestructuringErrors.parenthesizedBind = start
+        { refDestructuringErrors.parenthesizedBind = start; }
     }
     return expr
 
-  case tt.bracketL:
-    node = this.startNode()
-    this.next()
-    node.elements = this.parseExprList(tt.bracketR, true, true, refDestructuringErrors)
+  case types.bracketL:
+    node = this.startNode();
+    this.next();
+    node.elements = this.parseExprList(types.bracketR, true, true, refDestructuringErrors);
     return this.finishNode(node, "ArrayExpression")
 
-  case tt.braceL:
+  case types.braceL:
     return this.parseObj(false, refDestructuringErrors)
 
-  case tt._function:
-    node = this.startNode()
-    this.next()
+  case types._function:
+    node = this.startNode();
+    this.next();
     return this.parseFunction(node, false)
 
-  case tt._class:
+  case types._class:
     return this.parseClass(this.startNode(), false)
 
-  case tt._new:
+  case types._new:
     return this.parseNew()
 
-  case tt.backQuote:
+  case types.backQuote:
     return this.parseTemplate()
 
   default:
-    this.unexpected()
+    this.unexpected();
   }
-}
+};
 
 pp$3.parseLiteral = function(value) {
-  var node = this.startNode()
-  node.value = value
-  node.raw = this.input.slice(this.start, this.end)
-  this.next()
+  var node = this.startNode();
+  node.value = value;
+  node.raw = this.input.slice(this.start, this.end);
+  this.next();
   return this.finishNode(node, "Literal")
-}
+};
 
 pp$3.parseParenExpression = function() {
-  this.expect(tt.parenL)
-  var val = this.parseExpression()
-  this.expect(tt.parenR)
+  this.expect(types.parenL);
+  var val = this.parseExpression();
+  this.expect(types.parenR);
   return val
-}
+};
 
 pp$3.parseParenAndDistinguishExpression = function(canBeArrow) {
   var this$1 = this;
 
-  var startPos = this.start, startLoc = this.startLoc, val, allowTrailingComma = this.options.ecmaVersion >= 8
+  var startPos = this.start, startLoc = this.startLoc, val, allowTrailingComma = this.options.ecmaVersion >= 8;
   if (this.options.ecmaVersion >= 6) {
-    this.next()
-
-    var innerStartPos = this.start, innerStartLoc = this.startLoc
-    var exprList = [], first = true, lastIsComma = false
-    var refDestructuringErrors = new DestructuringErrors, oldYieldPos = this.yieldPos, oldAwaitPos = this.awaitPos, spreadStart, innerParenStart
-    this.yieldPos = 0
-    this.awaitPos = 0
-    while (this.type !== tt.parenR) {
-      first ? first = false : this$1.expect(tt.comma)
-      if (allowTrailingComma && this$1.afterTrailingComma(tt.parenR, true)) {
-        lastIsComma = true
+    this.next();
+
+    var innerStartPos = this.start, innerStartLoc = this.startLoc;
+    var exprList = [], first = true, lastIsComma = false;
+    var refDestructuringErrors = new DestructuringErrors, oldYieldPos = this.yieldPos, oldAwaitPos = this.awaitPos, spreadStart, innerParenStart;
+    this.yieldPos = 0;
+    this.awaitPos = 0;
+    while (this.type !== types.parenR) {
+      first ? first = false : this$1.expect(types.comma);
+      if (allowTrailingComma && this$1.afterTrailingComma(types.parenR, true)) {
+        lastIsComma = true;
         break
-      } else if (this$1.type === tt.ellipsis) {
-        spreadStart = this$1.start
-        exprList.push(this$1.parseParenItem(this$1.parseRest()))
-        if (this$1.type === tt.comma) this$1.raise(this$1.start, "Comma is not permitted after the rest element")
+      } else if (this$1.type === types.ellipsis) {
+        spreadStart = this$1.start;
+        exprList.push(this$1.parseParenItem(this$1.parseRestBinding()));
+        if (this$1.type === types.comma) { this$1.raise(this$1.start, "Comma is not permitted after the rest element"); }
         break
       } else {
-        if (this$1.type === tt.parenL && !innerParenStart) {
-          innerParenStart = this$1.start
+        if (this$1.type === types.parenL && !innerParenStart) {
+          innerParenStart = this$1.start;
         }
-        exprList.push(this$1.parseMaybeAssign(false, refDestructuringErrors, this$1.parseParenItem))
+        exprList.push(this$1.parseMaybeAssign(false, refDestructuringErrors, this$1.parseParenItem));
       }
     }
-    var innerEndPos = this.start, innerEndLoc = this.startLoc
-    this.expect(tt.parenR)
-
-    if (canBeArrow && !this.canInsertSemicolon() && this.eat(tt.arrow)) {
-      this.checkPatternErrors(refDestructuringErrors, false)
-      this.checkYieldAwaitInDefaultParams()
-      if (innerParenStart) this.unexpected(innerParenStart)
-      this.yieldPos = oldYieldPos
-      this.awaitPos = oldAwaitPos
+    var innerEndPos = this.start, innerEndLoc = this.startLoc;
+    this.expect(types.parenR);
+
+    if (canBeArrow && !this.canInsertSemicolon() && this.eat(types.arrow)) {
+      this.checkPatternErrors(refDestructuringErrors, false);
+      this.checkYieldAwaitInDefaultParams();
+      if (innerParenStart) { this.unexpected(innerParenStart); }
+      this.yieldPos = oldYieldPos;
+      this.awaitPos = oldAwaitPos;
       return this.parseParenArrowList(startPos, startLoc, exprList)
     }
 
-    if (!exprList.length || lastIsComma) this.unexpected(this.lastTokStart)
-    if (spreadStart) this.unexpected(spreadStart)
-    this.checkExpressionErrors(refDestructuringErrors, true)
-    this.yieldPos = oldYieldPos || this.yieldPos
-    this.awaitPos = oldAwaitPos || this.awaitPos
+    if (!exprList.length || lastIsComma) { this.unexpected(this.lastTokStart); }
+    if (spreadStart) { this.unexpected(spreadStart); }
+    this.checkExpressionErrors(refDestructuringErrors, true);
+    this.yieldPos = oldYieldPos || this.yieldPos;
+    this.awaitPos = oldAwaitPos || this.awaitPos;
 
     if (exprList.length > 1) {
-      val = this.startNodeAt(innerStartPos, innerStartLoc)
-      val.expressions = exprList
-      this.finishNodeAt(val, "SequenceExpression", innerEndPos, innerEndLoc)
+      val = this.startNodeAt(innerStartPos, innerStartLoc);
+      val.expressions = exprList;
+      this.finishNodeAt(val, "SequenceExpression", innerEndPos, innerEndLoc);
     } else {
-      val = exprList[0]
+      val = exprList[0];
     }
   } else {
-    val = this.parseParenExpression()
+    val = this.parseParenExpression();
   }
 
   if (this.options.preserveParens) {
-    var par = this.startNodeAt(startPos, startLoc)
-    par.expression = val
+    var par = this.startNodeAt(startPos, startLoc);
+    par.expression = val;
     return this.finishNode(par, "ParenthesizedExpression")
   } else {
     return val
   }
-}
+};
 
 pp$3.parseParenItem = function(item) {
   return item
-}
+};
 
 pp$3.parseParenArrowList = function(startPos, startLoc, exprList) {
   return this.parseArrowExpression(this.startNodeAt(startPos, startLoc), exprList)
-}
+};
 
 // New's precedence is slightly tricky. It must allow its argument to
 // be a `[]` or dot subscript expression, but not a call — at least,
@@ -2165,282 +2191,300 @@ pp$3.parseParenArrowList = function(startPos, startLoc, exprList) {
 // argument to parseSubscripts to prevent it from consuming the
 // argument list.
 
-var empty$1 = []
+var empty$1 = [];
 
 pp$3.parseNew = function() {
-  var node = this.startNode()
-  var meta = this.parseIdent(true)
-  if (this.options.ecmaVersion >= 6 && this.eat(tt.dot)) {
-    node.meta = meta
-    node.property = this.parseIdent(true)
+  var node = this.startNode();
+  var meta = this.parseIdent(true);
+  if (this.options.ecmaVersion >= 6 && this.eat(types.dot)) {
+    node.meta = meta;
+    node.property = this.parseIdent(true);
     if (node.property.name !== "target")
-      this.raiseRecoverable(node.property.start, "The only valid meta property for new is new.target")
+      { this.raiseRecoverable(node.property.start, "The only valid meta property for new is new.target"); }
     if (!this.inFunction)
-      this.raiseRecoverable(node.start, "new.target can only be used in functions")
+      { this.raiseRecoverable(node.start, "new.target can only be used in functions"); }
     return this.finishNode(node, "MetaProperty")
   }
-  var startPos = this.start, startLoc = this.startLoc
-  node.callee = this.parseSubscripts(this.parseExprAtom(), startPos, startLoc, true)
-  if (this.eat(tt.parenL)) node.arguments = this.parseExprList(tt.parenR, this.options.ecmaVersion >= 8, false)
-  else node.arguments = empty$1
+  var startPos = this.start, startLoc = this.startLoc;
+  node.callee = this.parseSubscripts(this.parseExprAtom(), startPos, startLoc, true);
+  if (this.eat(types.parenL)) { node.arguments = this.parseExprList(types.parenR, this.options.ecmaVersion >= 8, false); }
+  else { node.arguments = empty$1; }
   return this.finishNode(node, "NewExpression")
-}
+};
 
 // Parse template expression.
 
-pp$3.parseTemplateElement = function() {
-  var elem = this.startNode()
-  elem.value = {
-    raw: this.input.slice(this.start, this.end).replace(/\r\n?/g, "\n"),
-    cooked: this.value
+pp$3.parseTemplateElement = function(ref) {
+  var isTagged = ref.isTagged;
+
+  var elem = this.startNode();
+  if (this.type === types.invalidTemplate) {
+    if (!isTagged) {
+      this.raiseRecoverable(this.start, "Bad escape sequence in untagged template literal");
+    }
+    elem.value = {
+      raw: this.value,
+      cooked: null
+    };
+  } else {
+    elem.value = {
+      raw: this.input.slice(this.start, this.end).replace(/\r\n?/g, "\n"),
+      cooked: this.value
+    };
   }
-  this.next()
-  elem.tail = this.type === tt.backQuote
+  this.next();
+  elem.tail = this.type === types.backQuote;
   return this.finishNode(elem, "TemplateElement")
-}
+};
 
-pp$3.parseTemplate = function() {
+pp$3.parseTemplate = function(ref) {
   var this$1 = this;
-
-  var node = this.startNode()
-  this.next()
-  node.expressions = []
-  var curElt = this.parseTemplateElement()
-  node.quasis = [curElt]
+  if ( ref === void 0 ) ref = {};
+  var isTagged = ref.isTagged; if ( isTagged === void 0 ) isTagged = false;
+
+  var node = this.startNode();
+  this.next();
+  node.expressions = [];
+  var curElt = this.parseTemplateElement({isTagged: isTagged});
+  node.quasis = [curElt];
   while (!curElt.tail) {
-    this$1.expect(tt.dollarBraceL)
-    node.expressions.push(this$1.parseExpression())
-    this$1.expect(tt.braceR)
-    node.quasis.push(curElt = this$1.parseTemplateElement())
+    this$1.expect(types.dollarBraceL);
+    node.expressions.push(this$1.parseExpression());
+    this$1.expect(types.braceR);
+    node.quasis.push(curElt = this$1.parseTemplateElement({isTagged: isTagged}));
   }
-  this.next()
+  this.next();
   return this.finishNode(node, "TemplateLiteral")
-}
+};
 
 // Parse an object literal or binding pattern.
 
+pp$3.isAsyncProp = function(prop) {
+  return !prop.computed && prop.key.type === "Identifier" && prop.key.name === "async" &&
+    (this.type === types.name || this.type === types.num || this.type === types.string || this.type === types.bracketL) &&
+    !lineBreak.test(this.input.slice(this.lastTokEnd, this.start))
+};
+
 pp$3.parseObj = function(isPattern, refDestructuringErrors) {
   var this$1 = this;
 
-  var node = this.startNode(), first = true, propHash = {}
-  node.properties = []
-  this.next()
-  while (!this.eat(tt.braceR)) {
+  var node = this.startNode(), first = true, propHash = {};
+  node.properties = [];
+  this.next();
+  while (!this.eat(types.braceR)) {
     if (!first) {
-      this$1.expect(tt.comma)
-      if (this$1.afterTrailingComma(tt.braceR)) break
-    } else first = false
+      this$1.expect(types.comma);
+      if (this$1.afterTrailingComma(types.braceR)) { break }
+    } else { first = false; }
 
-    var prop = this$1.startNode(), isGenerator, isAsync, startPos, startLoc
+    var prop = this$1.startNode(), isGenerator = (void 0), isAsync = (void 0), startPos = (void 0), startLoc = (void 0);
     if (this$1.options.ecmaVersion >= 6) {
-      prop.method = false
-      prop.shorthand = false
+      prop.method = false;
+      prop.shorthand = false;
       if (isPattern || refDestructuringErrors) {
-        startPos = this$1.start
-        startLoc = this$1.startLoc
+        startPos = this$1.start;
+        startLoc = this$1.startLoc;
       }
       if (!isPattern)
-        isGenerator = this$1.eat(tt.star)
+        { isGenerator = this$1.eat(types.star); }
     }
-    this$1.parsePropertyName(prop)
-    if (!isPattern && this$1.options.ecmaVersion >= 8 && !isGenerator && !prop.computed &&
-        prop.key.type === "Identifier" && prop.key.name === "async" && this$1.type !== tt.parenL &&
-        this$1.type !== tt.colon && !this$1.canInsertSemicolon()) {
-      isAsync = true
-      this$1.parsePropertyName(prop, refDestructuringErrors)
+    this$1.parsePropertyName(prop);
+    if (!isPattern && this$1.options.ecmaVersion >= 8 && !isGenerator && this$1.isAsyncProp(prop)) {
+      isAsync = true;
+      this$1.parsePropertyName(prop, refDestructuringErrors);
     } else {
-      isAsync = false
+      isAsync = false;
     }
-    this$1.parsePropertyValue(prop, isPattern, isGenerator, isAsync, startPos, startLoc, refDestructuringErrors)
-    this$1.checkPropClash(prop, propHash)
-    node.properties.push(this$1.finishNode(prop, "Property"))
+    this$1.parsePropertyValue(prop, isPattern, isGenerator, isAsync, startPos, startLoc, refDestructuringErrors);
+    this$1.checkPropClash(prop, propHash);
+    node.properties.push(this$1.finishNode(prop, "Property"));
   }
   return this.finishNode(node, isPattern ? "ObjectPattern" : "ObjectExpression")
-}
+};
 
 pp$3.parsePropertyValue = function(prop, isPattern, isGenerator, isAsync, startPos, startLoc, refDestructuringErrors) {
-  if ((isGenerator || isAsync) && this.type === tt.colon)
-    this.unexpected()
-
-  if (this.eat(tt.colon)) {
-    prop.value = isPattern ? this.parseMaybeDefault(this.start, this.startLoc) : this.parseMaybeAssign(false, refDestructuringErrors)
-    prop.kind = "init"
-  } else if (this.options.ecmaVersion >= 6 && this.type === tt.parenL) {
-    if (isPattern) this.unexpected()
-    prop.kind = "init"
-    prop.method = true
-    prop.value = this.parseMethod(isGenerator, isAsync)
+  if ((isGenerator || isAsync) && this.type === types.colon)
+    { this.unexpected(); }
+
+  if (this.eat(types.colon)) {
+    prop.value = isPattern ? this.parseMaybeDefault(this.start, this.startLoc) : this.parseMaybeAssign(false, refDestructuringErrors);
+    prop.kind = "init";
+  } else if (this.options.ecmaVersion >= 6 && this.type === types.parenL) {
+    if (isPattern) { this.unexpected(); }
+    prop.kind = "init";
+    prop.method = true;
+    prop.value = this.parseMethod(isGenerator, isAsync);
   } else if (this.options.ecmaVersion >= 5 && !prop.computed && prop.key.type === "Identifier" &&
              (prop.key.name === "get" || prop.key.name === "set") &&
-             (this.type != tt.comma && this.type != tt.braceR)) {
-    if (isGenerator || isAsync || isPattern) this.unexpected()
-    prop.kind = prop.key.name
-    this.parsePropertyName(prop)
-    prop.value = this.parseMethod(false)
-    var paramCount = prop.kind === "get" ? 0 : 1
+             (this.type != types.comma && this.type != types.braceR)) {
+    if (isGenerator || isAsync || isPattern) { this.unexpected(); }
+    prop.kind = prop.key.name;
+    this.parsePropertyName(prop);
+    prop.value = this.parseMethod(false);
+    var paramCount = prop.kind === "get" ? 0 : 1;
     if (prop.value.params.length !== paramCount) {
-      var start = prop.value.start
+      var start = prop.value.start;
       if (prop.kind === "get")
-        this.raiseRecoverable(start, "getter should have no params")
+        { this.raiseRecoverable(start, "getter should have no params"); }
       else
-        this.raiseRecoverable(start, "setter should have exactly one param")
+        { this.raiseRecoverable(start, "setter should have exactly one param"); }
     } else {
       if (prop.kind === "set" && prop.value.params[0].type === "RestElement")
-        this.raiseRecoverable(prop.value.params[0].start, "Setter cannot use rest params")
+        { this.raiseRecoverable(prop.value.params[0].start, "Setter cannot use rest params"); }
     }
   } else if (this.options.ecmaVersion >= 6 && !prop.computed && prop.key.type === "Identifier") {
-    if (this.keywords.test(prop.key.name) ||
-        (this.strict ? this.reservedWordsStrict : this.reservedWords).test(prop.key.name) ||
-        (this.inGenerator && prop.key.name == "yield") ||
-        (this.inAsync && prop.key.name == "await"))
-      this.raiseRecoverable(prop.key.start, "'" + prop.key.name + "' can not be used as shorthand property")
-    prop.kind = "init"
+    this.checkUnreserved(prop.key);
+    prop.kind = "init";
     if (isPattern) {
-      prop.value = this.parseMaybeDefault(startPos, startLoc, prop.key)
-    } else if (this.type === tt.eq && refDestructuringErrors) {
+      prop.value = this.parseMaybeDefault(startPos, startLoc, prop.key);
+    } else if (this.type === types.eq && refDestructuringErrors) {
       if (refDestructuringErrors.shorthandAssign < 0)
-        refDestructuringErrors.shorthandAssign = this.start
-      prop.value = this.parseMaybeDefault(startPos, startLoc, prop.key)
+        { refDestructuringErrors.shorthandAssign = this.start; }
+      prop.value = this.parseMaybeDefault(startPos, startLoc, prop.key);
     } else {
-      prop.value = prop.key
+      prop.value = prop.key;
     }
-    prop.shorthand = true
-  } else this.unexpected()
-}
+    prop.shorthand = true;
+  } else { this.unexpected(); }
+};
 
 pp$3.parsePropertyName = function(prop) {
   if (this.options.ecmaVersion >= 6) {
-    if (this.eat(tt.bracketL)) {
-      prop.computed = true
-      prop.key = this.parseMaybeAssign()
-      this.expect(tt.bracketR)
+    if (this.eat(types.bracketL)) {
+      prop.computed = true;
+      prop.key = this.parseMaybeAssign();
+      this.expect(types.bracketR);
       return prop.key
     } else {
-      prop.computed = false
+      prop.computed = false;
     }
   }
-  return prop.key = this.type === tt.num || this.type === tt.string ? this.parseExprAtom() : this.parseIdent(true)
-}
+  return prop.key = this.type === types.num || this.type === types.string ? this.parseExprAtom() : this.parseIdent(true)
+};
 
 // Initialize empty function node.
 
 pp$3.initFunction = function(node) {
-  node.id = null
+  node.id = null;
   if (this.options.ecmaVersion >= 6) {
-    node.generator = false
-    node.expression = false
+    node.generator = false;
+    node.expression = false;
   }
   if (this.options.ecmaVersion >= 8)
-    node.async = false
-}
+    { node.async = false; }
+};
 
 // Parse object or class method.
 
 pp$3.parseMethod = function(isGenerator, isAsync) {
   var node = this.startNode(), oldInGen = this.inGenerator, oldInAsync = this.inAsync,
-      oldYieldPos = this.yieldPos, oldAwaitPos = this.awaitPos, oldInFunc = this.inFunction
+      oldYieldPos = this.yieldPos, oldAwaitPos = this.awaitPos, oldInFunc = this.inFunction;
 
-  this.initFunction(node)
+  this.initFunction(node);
   if (this.options.ecmaVersion >= 6)
-    node.generator = isGenerator
+    { node.generator = isGenerator; }
   if (this.options.ecmaVersion >= 8)
-    node.async = !!isAsync
-
-  this.inGenerator = node.generator
-  this.inAsync = node.async
-  this.yieldPos = 0
-  this.awaitPos = 0
-  this.inFunction = true
-  this.enterFunctionScope()
-
-  this.expect(tt.parenL)
-  node.params = this.parseBindingList(tt.parenR, false, this.options.ecmaVersion >= 8)
-  this.checkYieldAwaitInDefaultParams()
-  this.parseFunctionBody(node, false)
-
-  this.inGenerator = oldInGen
-  this.inAsync = oldInAsync
-  this.yieldPos = oldYieldPos
-  this.awaitPos = oldAwaitPos
-  this.inFunction = oldInFunc
+    { node.async = !!isAsync; }
+
+  this.inGenerator = node.generator;
+  this.inAsync = node.async;
+  this.yieldPos = 0;
+  this.awaitPos = 0;
+  this.inFunction = true;
+  this.enterFunctionScope();
+
+  this.expect(types.parenL);
+  node.params = this.parseBindingList(types.parenR, false, this.options.ecmaVersion >= 8);
+  this.checkYieldAwaitInDefaultParams();
+  this.parseFunctionBody(node, false);
+
+  this.inGenerator = oldInGen;
+  this.inAsync = oldInAsync;
+  this.yieldPos = oldYieldPos;
+  this.awaitPos = oldAwaitPos;
+  this.inFunction = oldInFunc;
   return this.finishNode(node, "FunctionExpression")
-}
+};
 
 // Parse arrow function expression with given parameters.
 
 pp$3.parseArrowExpression = function(node, params, isAsync) {
   var oldInGen = this.inGenerator, oldInAsync = this.inAsync,
-      oldYieldPos = this.yieldPos, oldAwaitPos = this.awaitPos, oldInFunc = this.inFunction
+      oldYieldPos = this.yieldPos, oldAwaitPos = this.awaitPos, oldInFunc = this.inFunction;
 
-  this.enterFunctionScope()
-  this.initFunction(node)
+  this.enterFunctionScope();
+  this.initFunction(node);
   if (this.options.ecmaVersion >= 8)
-    node.async = !!isAsync
-
-  this.inGenerator = false
-  this.inAsync = node.async
-  this.yieldPos = 0
-  this.awaitPos = 0
-  this.inFunction = true
-
-  node.params = this.toAssignableList(params, true)
-  this.parseFunctionBody(node, true)
-
-  this.inGenerator = oldInGen
-  this.inAsync = oldInAsync
-  this.yieldPos = oldYieldPos
-  this.awaitPos = oldAwaitPos
-  this.inFunction = oldInFunc
+    { node.async = !!isAsync; }
+
+  this.inGenerator = false;
+  this.inAsync = node.async;
+  this.yieldPos = 0;
+  this.awaitPos = 0;
+  this.inFunction = true;
+
+  node.params = this.toAssignableList(params, true);
+  this.parseFunctionBody(node, true);
+
+  this.inGenerator = oldInGen;
+  this.inAsync = oldInAsync;
+  this.yieldPos = oldYieldPos;
+  this.awaitPos = oldAwaitPos;
+  this.inFunction = oldInFunc;
   return this.finishNode(node, "ArrowFunctionExpression")
-}
+};
 
 // Parse function body and check parameters.
 
 pp$3.parseFunctionBody = function(node, isArrowFunction) {
-  var isExpression = isArrowFunction && this.type !== tt.braceL
-  var oldStrict = this.strict, useStrict = false
+  var isExpression = isArrowFunction && this.type !== types.braceL;
+  var oldStrict = this.strict, useStrict = false;
 
   if (isExpression) {
-    node.body = this.parseMaybeAssign()
-    node.expression = true
-    this.checkParams(node, false)
+    node.body = this.parseMaybeAssign();
+    node.expression = true;
+    this.checkParams(node, false);
   } else {
-    var nonSimple = this.options.ecmaVersion >= 7 && !this.isSimpleParamList(node.params)
+    var nonSimple = this.options.ecmaVersion >= 7 && !this.isSimpleParamList(node.params);
     if (!oldStrict || nonSimple) {
-      useStrict = this.strictDirective(this.end)
+      useStrict = this.strictDirective(this.end);
       // If this is a strict mode function, verify that argument names
       // are not repeated, and it does not try to bind the words `eval`
       // or `arguments`.
       if (useStrict && nonSimple)
-        this.raiseRecoverable(node.start, "Illegal 'use strict' directive in function with non-simple parameter list")
+        { this.raiseRecoverable(node.start, "Illegal 'use strict' directive in function with non-simple parameter list"); }
     }
     // Start a new scope with regard to labels and the `inFunction`
     // flag (restore them to their old value afterwards).
-    var oldLabels = this.labels
-    this.labels = []
-    if (useStrict) this.strict = true
+    var oldLabels = this.labels;
+    this.labels = [];
+    if (useStrict) { this.strict = true; }
 
     // Add the params to varDeclaredNames to ensure that an error is thrown
     // if a let/const declaration in the function clashes with one of the params.
-    this.checkParams(node, !oldStrict && !useStrict && !isArrowFunction && this.isSimpleParamList(node.params))
-    node.body = this.parseBlock(false)
-    node.expression = false
-    this.labels = oldLabels
+    this.checkParams(node, !oldStrict && !useStrict && !isArrowFunction && this.isSimpleParamList(node.params));
+    node.body = this.parseBlock(false);
+    node.expression = false;
+    this.labels = oldLabels;
   }
-  this.exitFunctionScope()
+  this.exitFunctionScope();
 
   if (this.strict && node.id) {
     // Ensure the function name isn't a forbidden identifier in strict mode, e.g. 'eval'
-    this.checkLVal(node.id, "none")
+    this.checkLVal(node.id, "none");
   }
-  this.strict = oldStrict
-}
+  this.strict = oldStrict;
+};
 
 pp$3.isSimpleParamList = function(params) {
-  for (var i = 0; i < params.length; i++)
-    if (params[i].type !== "Identifier") return false
+  for (var i = 0, list = params; i < list.length; i += 1)
+    {
+    var param = list[i];
+
+    if (param.type !== "Identifier") { return false
+  } }
   return true
-}
+};
 
 // Checks function params for various disallowed patterns such as using "eval"
 // or "arguments" and duplicate parameters.
@@ -2448,9 +2492,14 @@ pp$3.isSimpleParamList = function(params) {
 pp$3.checkParams = function(node, allowDuplicates) {
   var this$1 = this;
 
-  var nameHash = {}
-  for (var i = 0; i < node.params.length; i++) this$1.checkLVal(node.params[i], "var", allowDuplicates ? null : nameHash)
-}
+  var nameHash = {};
+  for (var i = 0, list = node.params; i < list.length; i += 1)
+    {
+    var param = list[i];
+
+    this$1.checkLVal(param, "var", allowDuplicates ? null : nameHash);
+  }
+};
 
 // Parses a comma-separated list of expressions, and returns them as
 // an array. `close` is the token type that ends the list, and
@@ -2461,81 +2510,93 @@ pp$3.checkParams = function(node, allowDuplicates) {
 pp$3.parseExprList = function(close, allowTrailingComma, allowEmpty, refDestructuringErrors) {
   var this$1 = this;
 
-  var elts = [], first = true
+  var elts = [], first = true;
   while (!this.eat(close)) {
     if (!first) {
-      this$1.expect(tt.comma)
-      if (allowTrailingComma && this$1.afterTrailingComma(close)) break
-    } else first = false
-
-    var elt
-    if (allowEmpty && this$1.type === tt.comma)
-      elt = null
-    else if (this$1.type === tt.ellipsis) {
-      elt = this$1.parseSpread(refDestructuringErrors)
-      if (refDestructuringErrors && this$1.type === tt.comma && refDestructuringErrors.trailingComma < 0)
-        refDestructuringErrors.trailingComma = this$1.start
+      this$1.expect(types.comma);
+      if (allowTrailingComma && this$1.afterTrailingComma(close)) { break }
+    } else { first = false; }
+
+    var elt = (void 0);
+    if (allowEmpty && this$1.type === types.comma)
+      { elt = null; }
+    else if (this$1.type === types.ellipsis) {
+      elt = this$1.parseSpread(refDestructuringErrors);
+      if (refDestructuringErrors && this$1.type === types.comma && refDestructuringErrors.trailingComma < 0)
+        { refDestructuringErrors.trailingComma = this$1.start; }
     } else {
-      elt = this$1.parseMaybeAssign(false, refDestructuringErrors)
+      elt = this$1.parseMaybeAssign(false, refDestructuringErrors);
     }
-    elts.push(elt)
+    elts.push(elt);
   }
   return elts
-}
+};
 
 // Parse the next token as an identifier. If `liberal` is true (used
 // when parsing properties), it will also convert keywords into
 // identifiers.
 
-pp$3.parseIdent = function(liberal) {
-  var node = this.startNode()
-  if (liberal && this.options.allowReserved == "never") liberal = false
-  if (this.type === tt.name) {
-    if (!liberal && (this.strict ? this.reservedWordsStrict : this.reservedWords).test(this.value) &&
-        (this.options.ecmaVersion >= 6 ||
-         this.input.slice(this.start, this.end).indexOf("\\") == -1))
-      this.raiseRecoverable(this.start, "The keyword '" + this.value + "' is reserved")
-    if (this.inGenerator && this.value === "yield")
-      this.raiseRecoverable(this.start, "Can not use 'yield' as identifier inside a generator")
-    if (this.inAsync && this.value === "await")
-      this.raiseRecoverable(this.start, "Can not use 'await' as identifier inside an async function")
-    node.name = this.value
-  } else if (liberal && this.type.keyword) {
-    node.name = this.type.keyword
+pp$3.checkUnreserved = function(ref) {
+  var start = ref.start;
+  var end = ref.end;
+  var name = ref.name;
+
+  if (this.inGenerator && name === "yield")
+    { this.raiseRecoverable(start, "Can not use 'yield' as identifier inside a generator"); }
+  if (this.inAsync && name === "await")
+    { this.raiseRecoverable(start, "Can not use 'await' as identifier inside an async function"); }
+  if (this.isKeyword(name))
+    { this.raise(start, ("Unexpected keyword '" + name + "'")); }
+  if (this.options.ecmaVersion < 6 &&
+    this.input.slice(start, end).indexOf("\\") != -1) { return }
+  var re = this.strict ? this.reservedWordsStrict : this.reservedWords;
+  if (re.test(name))
+    { this.raiseRecoverable(start, ("The keyword '" + name + "' is reserved")); }
+};
+
+pp$3.parseIdent = function(liberal, isBinding) {
+  var node = this.startNode();
+  if (liberal && this.options.allowReserved == "never") { liberal = false; }
+  if (this.type === types.name) {
+    node.name = this.value;
+  } else if (this.type.keyword) {
+    node.name = this.type.keyword;
   } else {
-    this.unexpected()
+    this.unexpected();
   }
-  this.next()
-  return this.finishNode(node, "Identifier")
-}
+  this.next();
+  this.finishNode(node, "Identifier");
+  if (!liberal) { this.checkUnreserved(node); }
+  return node
+};
 
 // Parses yield expression inside generator.
 
 pp$3.parseYield = function() {
-  if (!this.yieldPos) this.yieldPos = this.start
+  if (!this.yieldPos) { this.yieldPos = this.start; }
 
-  var node = this.startNode()
-  this.next()
-  if (this.type == tt.semi || this.canInsertSemicolon() || (this.type != tt.star && !this.type.startsExpr)) {
-    node.delegate = false
-    node.argument = null
+  var node = this.startNode();
+  this.next();
+  if (this.type == types.semi || this.canInsertSemicolon() || (this.type != types.star && !this.type.startsExpr)) {
+    node.delegate = false;
+    node.argument = null;
   } else {
-    node.delegate = this.eat(tt.star)
-    node.argument = this.parseMaybeAssign()
+    node.delegate = this.eat(types.star);
+    node.argument = this.parseMaybeAssign();
   }
   return this.finishNode(node, "YieldExpression")
-}
+};
 
 pp$3.parseAwait = function() {
-  if (!this.awaitPos) this.awaitPos = this.start
+  if (!this.awaitPos) { this.awaitPos = this.start; }
 
-  var node = this.startNode()
-  this.next()
-  node.argument = this.parseMaybeUnary(null, true)
+  var node = this.startNode();
+  this.next();
+  node.argument = this.parseMaybeUnary(null, true);
   return this.finishNode(node, "AwaitExpression")
-}
+};
 
-var pp$4 = Parser.prototype
+var pp$4 = Parser.prototype;
 
 // This function is used to raise exceptions on parse errors. It
 // takes an offset integer (into the current `input`) to indicate
@@ -2544,38 +2605,39 @@ var pp$4 = Parser.prototype
 // message.
 
 pp$4.raise = function(pos, message) {
-  var loc = getLineInfo(this.input, pos)
-  message += " (" + loc.line + ":" + loc.column + ")"
-  var err = new SyntaxError(message)
-  err.pos = pos; err.loc = loc; err.raisedAt = this.pos
+  var loc = getLineInfo(this.input, pos);
+  message += " (" + loc.line + ":" + loc.column + ")";
+  var err = new SyntaxError(message);
+  err.pos = pos; err.loc = loc; err.raisedAt = this.pos;
   throw err
-}
+};
 
-pp$4.raiseRecoverable = pp$4.raise
+pp$4.raiseRecoverable = pp$4.raise;
 
 pp$4.curPosition = function() {
   if (this.options.locations) {
     return new Position(this.curLine, this.pos - this.lineStart)
   }
-}
+};
 
-var pp$5 = Parser.prototype
+var pp$5 = Parser.prototype;
 
 // Object.assign polyfill
 var assign = Object.assign || function(target) {
   var sources = [], len = arguments.length - 1;
   while ( len-- > 0 ) sources[ len ] = arguments[ len + 1 ];
 
-  for (var i = 0; i < sources.length; i++) {
-    var source = sources[i]
+  for (var i = 0, list = sources; i < list.length; i += 1) {
+    var source = list[i];
+
     for (var key in source) {
       if (has(source, key)) {
-        target[key] = source[key]
+        target[key] = source[key];
       }
     }
   }
   return target
-}
+};
 
 // The functions in this module keep track of declared variables in the current scope in order to detect duplicate variable names.
 
@@ -2584,37 +2646,37 @@ pp$5.enterFunctionScope = function() {
   // lexical: a hash of lexically-declared names in the current lexical scope
   // childVar: a hash of var-declared names in all child lexical scopes of the current lexical scope (within the current function scope)
   // parentLexical: a hash of lexically-declared names in all parent lexical scopes of the current lexical scope (within the current function scope)
-  this.scopeStack.push({var: {}, lexical: {}, childVar: {}, parentLexical: {}})
-}
+  this.scopeStack.push({var: {}, lexical: {}, childVar: {}, parentLexical: {}});
+};
 
 pp$5.exitFunctionScope = function() {
-  this.scopeStack.pop()
-}
+  this.scopeStack.pop();
+};
 
 pp$5.enterLexicalScope = function() {
-  var parentScope = this.scopeStack[this.scopeStack.length - 1]
-  var childScope = {var: {}, lexical: {}, childVar: {}, parentLexical: {}}
+  var parentScope = this.scopeStack[this.scopeStack.length - 1];
+  var childScope = {var: {}, lexical: {}, childVar: {}, parentLexical: {}};
 
-  this.scopeStack.push(childScope)
-  assign(childScope.parentLexical, parentScope.lexical, parentScope.parentLexical)
-}
+  this.scopeStack.push(childScope);
+  assign(childScope.parentLexical, parentScope.lexical, parentScope.parentLexical);
+};
 
 pp$5.exitLexicalScope = function() {
-  var childScope = this.scopeStack.pop()
-  var parentScope = this.scopeStack[this.scopeStack.length - 1]
+  var childScope = this.scopeStack.pop();
+  var parentScope = this.scopeStack[this.scopeStack.length - 1];
 
-  assign(parentScope.childVar, childScope.var, childScope.childVar)
-}
+  assign(parentScope.childVar, childScope.var, childScope.childVar);
+};
 
 /**
  * A name can be declared with `var` if there are no variables with the same name declared with `let`/`const`
  * in the current lexical scope or any of the parent lexical scopes in this function.
  */
 pp$5.canDeclareVarName = function(name) {
-  var currentScope = this.scopeStack[this.scopeStack.length - 1]
+  var currentScope = this.scopeStack[this.scopeStack.length - 1];
 
   return !has(currentScope.lexical, name) && !has(currentScope.parentLexical, name)
-}
+};
 
 /**
  * A name can be declared with `let`/`const` if there are no variables with the same name declared with `let`/`const`
@@ -2622,329 +2684,337 @@ pp$5.canDeclareVarName = function(name) {
  * any child lexical scopes in this function.
  */
 pp$5.canDeclareLexicalName = function(name) {
-  var currentScope = this.scopeStack[this.scopeStack.length - 1]
+  var currentScope = this.scopeStack[this.scopeStack.length - 1];
 
   return !has(currentScope.lexical, name) && !has(currentScope.var, name) && !has(currentScope.childVar, name)
-}
+};
 
 pp$5.declareVarName = function(name) {
-  this.scopeStack[this.scopeStack.length - 1].var[name] = true
-}
+  this.scopeStack[this.scopeStack.length - 1].var[name] = true;
+};
 
 pp$5.declareLexicalName = function(name) {
-  this.scopeStack[this.scopeStack.length - 1].lexical[name] = true
-}
+  this.scopeStack[this.scopeStack.length - 1].lexical[name] = true;
+};
 
 var Node = function Node(parser, pos, loc) {
-  this.type = ""
-  this.start = pos
-  this.end = 0
+  this.type = "";
+  this.start = pos;
+  this.end = 0;
   if (parser.options.locations)
-    this.loc = new SourceLocation(parser, loc)
+    { this.loc = new SourceLocation(parser, loc); }
   if (parser.options.directSourceFile)
-    this.sourceFile = parser.options.directSourceFile
+    { this.sourceFile = parser.options.directSourceFile; }
   if (parser.options.ranges)
-    this.range = [pos, 0]
+    { this.range = [pos, 0]; }
 };
 
 // Start an AST node, attaching a start offset.
 
-var pp$6 = Parser.prototype
+var pp$6 = Parser.prototype;
 
 pp$6.startNode = function() {
   return new Node(this, this.start, this.startLoc)
-}
+};
 
 pp$6.startNodeAt = function(pos, loc) {
   return new Node(this, pos, loc)
-}
+};
 
 // Finish an AST node, adding `type` and `end` properties.
 
 function finishNodeAt(node, type, pos, loc) {
-  node.type = type
-  node.end = pos
+  node.type = type;
+  node.end = pos;
   if (this.options.locations)
-    node.loc.end = loc
+    { node.loc.end = loc; }
   if (this.options.ranges)
-    node.range[1] = pos
+    { node.range[1] = pos; }
   return node
 }
 
 pp$6.finishNode = function(node, type) {
   return finishNodeAt.call(this, node, type, this.lastTokEnd, this.lastTokEndLoc)
-}
+};
 
 // Finish node at given position
 
 pp$6.finishNodeAt = function(node, type, pos, loc) {
   return finishNodeAt.call(this, node, type, pos, loc)
-}
+};
 
 // The algorithm used to determine whether a regexp can appear at a
 // given point in the program is loosely based on sweet.js' approach.
 // See https://github.com/mozilla/sweet.js/wiki/design
 
 var TokContext = function TokContext(token, isExpr, preserveSpace, override, generator) {
-  this.token = token
-  this.isExpr = !!isExpr
-  this.preserveSpace = !!preserveSpace
-  this.override = override
-  this.generator = !!generator
+  this.token = token;
+  this.isExpr = !!isExpr;
+  this.preserveSpace = !!preserveSpace;
+  this.override = override;
+  this.generator = !!generator;
 };
 
-var types = {
+var types$1 = {
   b_stat: new TokContext("{", false),
   b_expr: new TokContext("{", true),
-  b_tmpl: new TokContext("${", true),
+  b_tmpl: new TokContext("${", false),
   p_stat: new TokContext("(", false),
   p_expr: new TokContext("(", true),
-  q_tmpl: new TokContext("`", true, true, function (p) { return p.readTmplToken(); }),
+  q_tmpl: new TokContext("`", true, true, function (p) { return p.tryReadTemplateToken(); }),
+  f_stat: new TokContext("function", false),
   f_expr: new TokContext("function", true),
   f_expr_gen: new TokContext("function", true, false, null, true),
   f_gen: new TokContext("function", false, false, null, true)
-}
+};
 
-var pp$7 = Parser.prototype
+var pp$7 = Parser.prototype;
 
 pp$7.initialContext = function() {
-  return [types.b_stat]
-}
+  return [types$1.b_stat]
+};
 
 pp$7.braceIsBlock = function(prevType) {
-  if (prevType === tt.colon) {
-    var parent = this.curContext()
-    if (parent === types.b_stat || parent === types.b_expr)
-      return !parent.isExpr
-  }
-  if (prevType === tt._return)
-    return lineBreak.test(this.input.slice(this.lastTokEnd, this.start))
-  if (prevType === tt._else || prevType === tt.semi || prevType === tt.eof || prevType === tt.parenR || prevType == tt.arrow)
-    return true
-  if (prevType == tt.braceL)
-    return this.curContext() === types.b_stat
+  var parent = this.curContext();
+  if (parent === types$1.f_expr || parent === types$1.f_stat)
+    { return true }
+  if (prevType === types.colon && (parent === types$1.b_stat || parent === types$1.b_expr))
+    { return !parent.isExpr }
+
+  // The check for `tt.name && exprAllowed` detects whether we are
+  // after a `yield` or `of` construct. See the `updateContext` for
+  // `tt.name`.
+  if (prevType === types._return || prevType == types.name && this.exprAllowed)
+    { return lineBreak.test(this.input.slice(this.lastTokEnd, this.start)) }
+  if (prevType === types._else || prevType === types.semi || prevType === types.eof || prevType === types.parenR || prevType == types.arrow)
+    { return true }
+  if (prevType == types.braceL)
+    { return parent === types$1.b_stat }
+  if (prevType == types._var || prevType == types.name)
+    { return false }
   return !this.exprAllowed
-}
+};
 
 pp$7.inGeneratorContext = function() {
   var this$1 = this;
 
-  for (var i = this.context.length - 1; i >= 0; i--)
-    if (this$1.context[i].generator) return true
+  for (var i = this.context.length - 1; i >= 1; i--) {
+    var context = this$1.context[i];
+    if (context.token === "function")
+      { return context.generator }
+  }
   return false
-}
+};
 
 pp$7.updateContext = function(prevType) {
-  var update, type = this.type
-  if (type.keyword && prevType == tt.dot)
-    this.exprAllowed = false
+  var update, type = this.type;
+  if (type.keyword && prevType == types.dot)
+    { this.exprAllowed = false; }
   else if (update = type.updateContext)
-    update.call(this, prevType)
+    { update.call(this, prevType); }
   else
-    this.exprAllowed = type.beforeExpr
-}
+    { this.exprAllowed = type.beforeExpr; }
+};
 
 // Token-specific context update code
 
-tt.parenR.updateContext = tt.braceR.updateContext = function() {
+types.parenR.updateContext = types.braceR.updateContext = function() {
   if (this.context.length == 1) {
-    this.exprAllowed = true
+    this.exprAllowed = true;
     return
   }
-  var out = this.context.pop(), cur
-  if (out === types.b_stat && (cur = this.curContext()) && cur.token === "function") {
-    this.context.pop()
-    this.exprAllowed = false
-  } else if (out === types.b_tmpl) {
-    this.exprAllowed = true
-  } else {
-    this.exprAllowed = !out.isExpr
+  var out = this.context.pop();
+  if (out === types$1.b_stat && this.curContext().token === "function") {
+    out = this.context.pop();
   }
-}
+  this.exprAllowed = !out.isExpr;
+};
 
-tt.braceL.updateContext = function(prevType) {
-  this.context.push(this.braceIsBlock(prevType) ? types.b_stat : types.b_expr)
-  this.exprAllowed = true
-}
+types.braceL.updateContext = function(prevType) {
+  this.context.push(this.braceIsBlock(prevType) ? types$1.b_stat : types$1.b_expr);
+  this.exprAllowed = true;
+};
 
-tt.dollarBraceL.updateContext = function() {
-  this.context.push(types.b_tmpl)
-  this.exprAllowed = true
-}
+types.dollarBraceL.updateContext = function() {
+  this.context.push(types$1.b_tmpl);
+  this.exprAllowed = true;
+};
 
-tt.parenL.updateContext = function(prevType) {
-  var statementParens = prevType === tt._if || prevType === tt._for || prevType === tt._with || prevType === tt._while
-  this.context.push(statementParens ? types.p_stat : types.p_expr)
-  this.exprAllowed = true
-}
+types.parenL.updateContext = function(prevType) {
+  var statementParens = prevType === types._if || prevType === types._for || prevType === types._with || prevType === types._while;
+  this.context.push(statementParens ? types$1.p_stat : types$1.p_expr);
+  this.exprAllowed = true;
+};
 
-tt.incDec.updateContext = function() {
+types.incDec.updateContext = function() {
   // tokExprAllowed stays unchanged
-}
+};
 
-tt._function.updateContext = function(prevType) {
-  if (prevType.beforeExpr && prevType !== tt.semi && prevType !== tt._else &&
-      !((prevType === tt.colon || prevType === tt.braceL) && this.curContext() === types.b_stat))
-    this.context.push(types.f_expr)
-  this.exprAllowed = false
-}
+types._function.updateContext = types._class.updateContext = function(prevType) {
+  if (prevType.beforeExpr && prevType !== types.semi && prevType !== types._else &&
+      !((prevType === types.colon || prevType === types.braceL) && this.curContext() === types$1.b_stat))
+    { this.context.push(types$1.f_expr); }
+  else
+    { this.context.push(types$1.f_stat); }
+  this.exprAllowed = false;
+};
 
-tt.backQuote.updateContext = function() {
-  if (this.curContext() === types.q_tmpl)
-    this.context.pop()
+types.backQuote.updateContext = function() {
+  if (this.curContext() === types$1.q_tmpl)
+    { this.context.pop(); }
   else
-    this.context.push(types.q_tmpl)
-  this.exprAllowed = false
-}
+    { this.context.push(types$1.q_tmpl); }
+  this.exprAllowed = false;
+};
 
-tt.star.updateContext = function(prevType) {
-  if (prevType == tt._function) {
-    if (this.curContext() === types.f_expr)
-      this.context[this.context.length - 1] = types.f_expr_gen
+types.star.updateContext = function(prevType) {
+  if (prevType == types._function) {
+    var index = this.context.length - 1;
+    if (this.context[index] === types$1.f_expr)
+      { this.context[index] = types$1.f_expr_gen; }
     else
-      this.context.push(types.f_gen)
+      { this.context[index] = types$1.f_gen; }
   }
-  this.exprAllowed = true
-}
+  this.exprAllowed = true;
+};
 
-tt.name.updateContext = function(prevType) {
-  var allowed = false
+types.name.updateContext = function(prevType) {
+  var allowed = false;
   if (this.options.ecmaVersion >= 6) {
     if (this.value == "of" && !this.exprAllowed ||
         this.value == "yield" && this.inGeneratorContext())
-      allowed = true
+      { allowed = true; }
   }
-  this.exprAllowed = allowed
-}
+  this.exprAllowed = allowed;
+};
 
 // Object type used to represent tokens. Note that normally, tokens
 // simply exist as properties on the parser object. This is only
 // used for the onToken callback and the external tokenizer.
 
 var Token = function Token(p) {
-  this.type = p.type
-  this.value = p.value
-  this.start = p.start
-  this.end = p.end
+  this.type = p.type;
+  this.value = p.value;
+  this.start = p.start;
+  this.end = p.end;
   if (p.options.locations)
-    this.loc = new SourceLocation(p, p.startLoc, p.endLoc)
+    { this.loc = new SourceLocation(p, p.startLoc, p.endLoc); }
   if (p.options.ranges)
-    this.range = [p.start, p.end]
+    { this.range = [p.start, p.end]; }
 };
 
 // ## Tokenizer
 
-var pp$8 = Parser.prototype
+var pp$8 = Parser.prototype;
 
 // Are we running under Rhino?
-var isRhino = typeof Packages == "object" && Object.prototype.toString.call(Packages) == "[object JavaPackage]"
+var isRhino = typeof Packages == "object" && Object.prototype.toString.call(Packages) == "[object JavaPackage]";
 
 // Move to the next token
 
 pp$8.next = function() {
   if (this.options.onToken)
-    this.options.onToken(new Token(this))
+    { this.options.onToken(new Token(this)); }
 
-  this.lastTokEnd = this.end
-  this.lastTokStart = this.start
-  this.lastTokEndLoc = this.endLoc
-  this.lastTokStartLoc = this.startLoc
-  this.nextToken()
-}
+  this.lastTokEnd = this.end;
+  this.lastTokStart = this.start;
+  this.lastTokEndLoc = this.endLoc;
+  this.lastTokStartLoc = this.startLoc;
+  this.nextToken();
+};
 
 pp$8.getToken = function() {
-  this.next()
+  this.next();
   return new Token(this)
-}
+};
 
 // If we're in an ES6 environment, make parsers iterable
 if (typeof Symbol !== "undefined")
-  pp$8[Symbol.iterator] = function() {
+  { pp$8[Symbol.iterator] = function() {
     var this$1 = this;
 
     return {
       next: function () {
-        var token = this$1.getToken()
+        var token = this$1.getToken();
         return {
-          done: token.type === tt.eof,
+          done: token.type === types.eof,
           value: token
         }
       }
     }
-  }
+  }; }
 
 // Toggle strict mode. Re-reads the next number or string to please
 // pedantic tests (`"use strict"; 010;` should fail).
 
 pp$8.curContext = function() {
   return this.context[this.context.length - 1]
-}
+};
 
 // Read a single token, updating the parser object's token-related
 // properties.
 
 pp$8.nextToken = function() {
-  var curContext = this.curContext()
-  if (!curContext || !curContext.preserveSpace) this.skipSpace()
+  var curContext = this.curContext();
+  if (!curContext || !curContext.preserveSpace) { this.skipSpace(); }
 
-  this.start = this.pos
-  if (this.options.locations) this.startLoc = this.curPosition()
-  if (this.pos >= this.input.length) return this.finishToken(tt.eof)
+  this.start = this.pos;
+  if (this.options.locations) { this.startLoc = this.curPosition(); }
+  if (this.pos >= this.input.length) { return this.finishToken(types.eof) }
 
-  if (curContext.override) return curContext.override(this)
-  else this.readToken(this.fullCharCodeAtPos())
-}
+  if (curContext.override) { return curContext.override(this) }
+  else { this.readToken(this.fullCharCodeAtPos()); }
+};
 
 pp$8.readToken = function(code) {
   // Identifier or keyword. '\uXXXX' sequences are allowed in
   // identifiers, so '\' also dispatches to that.
   if (isIdentifierStart(code, this.options.ecmaVersion >= 6) || code === 92 /* '\' */)
-    return this.readWord()
+    { return this.readWord() }
 
   return this.getTokenFromCode(code)
-}
+};
 
 pp$8.fullCharCodeAtPos = function() {
-  var code = this.input.charCodeAt(this.pos)
-  if (code <= 0xd7ff || code >= 0xe000) return code
-  var next = this.input.charCodeAt(this.pos + 1)
+  var code = this.input.charCodeAt(this.pos);
+  if (code <= 0xd7ff || code >= 0xe000) { return code }
+  var next = this.input.charCodeAt(this.pos + 1);
   return (code << 10) + next - 0x35fdc00
-}
+};
 
 pp$8.skipBlockComment = function() {
   var this$1 = this;
 
-  var startLoc = this.options.onComment && this.curPosition()
-  var start = this.pos, end = this.input.indexOf("*/", this.pos += 2)
-  if (end === -1) this.raise(this.pos - 2, "Unterminated comment")
-  this.pos = end + 2
+  var startLoc = this.options.onComment && this.curPosition();
+  var start = this.pos, end = this.input.indexOf("*/", this.pos += 2);
+  if (end === -1) { this.raise(this.pos - 2, "Unterminated comment"); }
+  this.pos = end + 2;
   if (this.options.locations) {
-    lineBreakG.lastIndex = start
-    var match
+    lineBreakG.lastIndex = start;
+    var match;
     while ((match = lineBreakG.exec(this.input)) && match.index < this.pos) {
-      ++this$1.curLine
-      this$1.lineStart = match.index + match[0].length
+      ++this$1.curLine;
+      this$1.lineStart = match.index + match[0].length;
     }
   }
   if (this.options.onComment)
-    this.options.onComment(true, this.input.slice(start + 2, end), start, this.pos,
-                           startLoc, this.curPosition())
-}
+    { this.options.onComment(true, this.input.slice(start + 2, end), start, this.pos,
+                           startLoc, this.curPosition()); }
+};
 
 pp$8.skipLineComment = function(startSkip) {
   var this$1 = this;
 
-  var start = this.pos
-  var startLoc = this.options.onComment && this.curPosition()
-  var ch = this.input.charCodeAt(this.pos += startSkip)
-  while (this.pos < this.input.length && ch !== 10 && ch !== 13 && ch !== 8232 && ch !== 8233) {
-    ++this$1.pos
-    ch = this$1.input.charCodeAt(this$1.pos)
+  var start = this.pos;
+  var startLoc = this.options.onComment && this.curPosition();
+  var ch = this.input.charCodeAt(this.pos += startSkip);
+  while (this.pos < this.input.length && !isNewLine(ch)) {
+    ch = this$1.input.charCodeAt(++this$1.pos);
   }
   if (this.options.onComment)
-    this.options.onComment(false, this.input.slice(start + startSkip, this.pos), start, this.pos,
-                           startLoc, this.curPosition())
-}
+    { this.options.onComment(false, this.input.slice(start + startSkip, this.pos), start, this.pos,
+                           startLoc, this.curPosition()); }
+};
 
 // Called at the start of the parse and after every token. Skips
 // whitespace and comments, and.
@@ -2953,29 +3023,29 @@ pp$8.skipSpace = function() {
   var this$1 = this;
 
   loop: while (this.pos < this.input.length) {
-    var ch = this$1.input.charCodeAt(this$1.pos)
+    var ch = this$1.input.charCodeAt(this$1.pos);
     switch (ch) {
     case 32: case 160: // ' '
-      ++this$1.pos
+      ++this$1.pos;
       break
     case 13:
       if (this$1.input.charCodeAt(this$1.pos + 1) === 10) {
-        ++this$1.pos
+        ++this$1.pos;
       }
     case 10: case 8232: case 8233:
-      ++this$1.pos
+      ++this$1.pos;
       if (this$1.options.locations) {
-        ++this$1.curLine
-        this$1.lineStart = this$1.pos
+        ++this$1.curLine;
+        this$1.lineStart = this$1.pos;
       }
       break
     case 47: // '/'
       switch (this$1.input.charCodeAt(this$1.pos + 1)) {
       case 42: // '*'
-        this$1.skipBlockComment()
+        this$1.skipBlockComment();
         break
       case 47:
-        this$1.skipLineComment(2)
+        this$1.skipLineComment(2);
         break
       default:
         break loop
@@ -2983,13 +3053,13 @@ pp$8.skipSpace = function() {
       break
     default:
       if (ch > 8 && ch < 14 || ch >= 5760 && nonASCIIwhitespace.test(String.fromCharCode(ch))) {
-        ++this$1.pos
+        ++this$1.pos;
       } else {
         break loop
       }
     }
   }
-}
+};
 
 // Called at the end of every token. Sets `end`, `val`, and
 // maintains `context` and `exprAllowed`, and skips the space after
@@ -2997,14 +3067,14 @@ pp$8.skipSpace = function() {
 // right position.
 
 pp$8.finishToken = function(type, val) {
-  this.end = this.pos
-  if (this.options.locations) this.endLoc = this.curPosition()
-  var prevType = this.type
-  this.type = type
-  this.value = val
+  this.end = this.pos;
+  if (this.options.locations) { this.endLoc = this.curPosition(); }
+  var prevType = this.type;
+  this.type = type;
+  this.value = val;
 
-  this.updateContext(prevType)
-}
+  this.updateContext(prevType);
+};
 
 // ### Token reading
 
@@ -3016,99 +3086,99 @@ pp$8.finishToken = function(type, val) {
 // All in the name of speed.
 //
 pp$8.readToken_dot = function() {
-  var next = this.input.charCodeAt(this.pos + 1)
-  if (next >= 48 && next <= 57) return this.readNumber(true)
-  var next2 = this.input.charCodeAt(this.pos + 2)
+  var next = this.input.charCodeAt(this.pos + 1);
+  if (next >= 48 && next <= 57) { return this.readNumber(true) }
+  var next2 = this.input.charCodeAt(this.pos + 2);
   if (this.options.ecmaVersion >= 6 && next === 46 && next2 === 46) { // 46 = dot '.'
-    this.pos += 3
-    return this.finishToken(tt.ellipsis)
+    this.pos += 3;
+    return this.finishToken(types.ellipsis)
   } else {
-    ++this.pos
-    return this.finishToken(tt.dot)
+    ++this.pos;
+    return this.finishToken(types.dot)
   }
-}
+};
 
 pp$8.readToken_slash = function() { // '/'
-  var next = this.input.charCodeAt(this.pos + 1)
+  var next = this.input.charCodeAt(this.pos + 1);
   if (this.exprAllowed) { ++this.pos; return this.readRegexp() }
-  if (next === 61) return this.finishOp(tt.assign, 2)
-  return this.finishOp(tt.slash, 1)
-}
+  if (next === 61) { return this.finishOp(types.assign, 2) }
+  return this.finishOp(types.slash, 1)
+};
 
 pp$8.readToken_mult_modulo_exp = function(code) { // '%*'
-  var next = this.input.charCodeAt(this.pos + 1)
-  var size = 1
-  var tokentype = code === 42 ? tt.star : tt.modulo
+  var next = this.input.charCodeAt(this.pos + 1);
+  var size = 1;
+  var tokentype = code === 42 ? types.star : types.modulo;
 
   // exponentiation operator ** and **=
   if (this.options.ecmaVersion >= 7 && next === 42) {
-    ++size
-    tokentype = tt.starstar
-    next = this.input.charCodeAt(this.pos + 2)
+    ++size;
+    tokentype = types.starstar;
+    next = this.input.charCodeAt(this.pos + 2);
   }
 
-  if (next === 61) return this.finishOp(tt.assign, size + 1)
+  if (next === 61) { return this.finishOp(types.assign, size + 1) }
   return this.finishOp(tokentype, size)
-}
+};
 
 pp$8.readToken_pipe_amp = function(code) { // '|&'
-  var next = this.input.charCodeAt(this.pos + 1)
-  if (next === code) return this.finishOp(code === 124 ? tt.logicalOR : tt.logicalAND, 2)
-  if (next === 61) return this.finishOp(tt.assign, 2)
-  return this.finishOp(code === 124 ? tt.bitwiseOR : tt.bitwiseAND, 1)
-}
+  var next = this.input.charCodeAt(this.pos + 1);
+  if (next === code) { return this.finishOp(code === 124 ? types.logicalOR : types.logicalAND, 2) }
+  if (next === 61) { return this.finishOp(types.assign, 2) }
+  return this.finishOp(code === 124 ? types.bitwiseOR : types.bitwiseAND, 1)
+};
 
 pp$8.readToken_caret = function() { // '^'
-  var next = this.input.charCodeAt(this.pos + 1)
-  if (next === 61) return this.finishOp(tt.assign, 2)
-  return this.finishOp(tt.bitwiseXOR, 1)
-}
+  var next = this.input.charCodeAt(this.pos + 1);
+  if (next === 61) { return this.finishOp(types.assign, 2) }
+  return this.finishOp(types.bitwiseXOR, 1)
+};
 
 pp$8.readToken_plus_min = function(code) { // '+-'
-  var next = this.input.charCodeAt(this.pos + 1)
+  var next = this.input.charCodeAt(this.pos + 1);
   if (next === code) {
     if (next == 45 && this.input.charCodeAt(this.pos + 2) == 62 &&
-        lineBreak.test(this.input.slice(this.lastTokEnd, this.pos))) {
+        (this.lastTokEnd === 0 || lineBreak.test(this.input.slice(this.lastTokEnd, this.pos)))) {
       // A `-->` line comment
-      this.skipLineComment(3)
-      this.skipSpace()
+      this.skipLineComment(3);
+      this.skipSpace();
       return this.nextToken()
     }
-    return this.finishOp(tt.incDec, 2)
+    return this.finishOp(types.incDec, 2)
   }
-  if (next === 61) return this.finishOp(tt.assign, 2)
-  return this.finishOp(tt.plusMin, 1)
-}
+  if (next === 61) { return this.finishOp(types.assign, 2) }
+  return this.finishOp(types.plusMin, 1)
+};
 
 pp$8.readToken_lt_gt = function(code) { // '<>'
-  var next = this.input.charCodeAt(this.pos + 1)
-  var size = 1
+  var next = this.input.charCodeAt(this.pos + 1);
+  var size = 1;
   if (next === code) {
-    size = code === 62 && this.input.charCodeAt(this.pos + 2) === 62 ? 3 : 2
-    if (this.input.charCodeAt(this.pos + size) === 61) return this.finishOp(tt.assign, size + 1)
-    return this.finishOp(tt.bitShift, size)
+    size = code === 62 && this.input.charCodeAt(this.pos + 2) === 62 ? 3 : 2;
+    if (this.input.charCodeAt(this.pos + size) === 61) { return this.finishOp(types.assign, size + 1) }
+    return this.finishOp(types.bitShift, size)
   }
   if (next == 33 && code == 60 && this.input.charCodeAt(this.pos + 2) == 45 &&
       this.input.charCodeAt(this.pos + 3) == 45) {
-    if (this.inModule) this.unexpected()
+    if (this.inModule) { this.unexpected(); }
     // `<!--`, an XML-style comment that should be interpreted as a line comment
-    this.skipLineComment(4)
-    this.skipSpace()
+    this.skipLineComment(4);
+    this.skipSpace();
     return this.nextToken()
   }
-  if (next === 61) size = 2
-  return this.finishOp(tt.relational, size)
-}
+  if (next === 61) { size = 2; }
+  return this.finishOp(types.relational, size)
+};
 
 pp$8.readToken_eq_excl = function(code) { // '=!'
-  var next = this.input.charCodeAt(this.pos + 1)
-  if (next === 61) return this.finishOp(tt.equality, this.input.charCodeAt(this.pos + 2) === 61 ? 3 : 2)
+  var next = this.input.charCodeAt(this.pos + 1);
+  if (next === 61) { return this.finishOp(types.equality, this.input.charCodeAt(this.pos + 2) === 61 ? 3 : 2) }
   if (code === 61 && next === 62 && this.options.ecmaVersion >= 6) { // '=>'
-    this.pos += 2
-    return this.finishToken(tt.arrow)
+    this.pos += 2;
+    return this.finishToken(types.arrow)
   }
-  return this.finishOp(code === 61 ? tt.eq : tt.prefix, 1)
-}
+  return this.finishOp(code === 61 ? types.eq : types.prefix, 1)
+};
 
 pp$8.getTokenFromCode = function(code) {
   switch (code) {
@@ -3118,28 +3188,28 @@ pp$8.getTokenFromCode = function(code) {
     return this.readToken_dot()
 
     // Punctuation tokens.
-  case 40: ++this.pos; return this.finishToken(tt.parenL)
-  case 41: ++this.pos; return this.finishToken(tt.parenR)
-  case 59: ++this.pos; return this.finishToken(tt.semi)
-  case 44: ++this.pos; return this.finishToken(tt.comma)
-  case 91: ++this.pos; return this.finishToken(tt.bracketL)
-  case 93: ++this.pos; return this.finishToken(tt.bracketR)
-  case 123: ++this.pos; return this.finishToken(tt.braceL)
-  case 125: ++this.pos; return this.finishToken(tt.braceR)
-  case 58: ++this.pos; return this.finishToken(tt.colon)
-  case 63: ++this.pos; return this.finishToken(tt.question)
+  case 40: ++this.pos; return this.finishToken(types.parenL)
+  case 41: ++this.pos; return this.finishToken(types.parenR)
+  case 59: ++this.pos; return this.finishToken(types.semi)
+  case 44: ++this.pos; return this.finishToken(types.comma)
+  case 91: ++this.pos; return this.finishToken(types.bracketL)
+  case 93: ++this.pos; return this.finishToken(types.bracketR)
+  case 123: ++this.pos; return this.finishToken(types.braceL)
+  case 125: ++this.pos; return this.finishToken(types.braceR)
+  case 58: ++this.pos; return this.finishToken(types.colon)
+  case 63: ++this.pos; return this.finishToken(types.question)
 
   case 96: // '`'
-    if (this.options.ecmaVersion < 6) break
-    ++this.pos
-    return this.finishToken(tt.backQuote)
+    if (this.options.ecmaVersion < 6) { break }
+    ++this.pos;
+    return this.finishToken(types.backQuote)
 
   case 48: // '0'
-    var next = this.input.charCodeAt(this.pos + 1)
-    if (next === 120 || next === 88) return this.readRadixNumber(16) // '0x', '0X' - hex number
+    var next = this.input.charCodeAt(this.pos + 1);
+    if (next === 120 || next === 88) { return this.readRadixNumber(16) } // '0x', '0X' - hex number
     if (this.options.ecmaVersion >= 6) {
-      if (next === 111 || next === 79) return this.readRadixNumber(8) // '0o', '0O' - octal number
-      if (next === 98 || next === 66) return this.readRadixNumber(2) // '0b', '0B' - binary number
+      if (next === 111 || next === 79) { return this.readRadixNumber(8) } // '0o', '0O' - octal number
+      if (next === 98 || next === 66) { return this.readRadixNumber(2) } // '0b', '0B' - binary number
     }
     // Anything else beginning with a digit is an integer, octal
     // number, or float.
@@ -3177,17 +3247,17 @@ pp$8.getTokenFromCode = function(code) {
     return this.readToken_eq_excl(code)
 
   case 126: // '~'
-    return this.finishOp(tt.prefix, 1)
+    return this.finishOp(types.prefix, 1)
   }
 
-  this.raise(this.pos, "Unexpected character '" + codePointToString(code) + "'")
-}
+  this.raise(this.pos, "Unexpected character '" + codePointToString(code) + "'");
+};
 
 pp$8.finishOp = function(type, size) {
-  var str = this.input.slice(this.pos, this.pos + size)
-  this.pos += size
+  var str = this.input.slice(this.pos, this.pos + size);
+  this.pos += size;
   return this.finishToken(type, str)
-}
+};
 
 // Parse a regular expression. Some context-awareness is necessary,
 // since a '/' inside a '[]' set does not end the expression.
@@ -3197,43 +3267,43 @@ function tryCreateRegexp(src, flags, throwErrorAt, parser) {
     return new RegExp(src, flags)
   } catch (e) {
     if (throwErrorAt !== undefined) {
-      if (e instanceof SyntaxError) parser.raise(throwErrorAt, "Error parsing regular expression: " + e.message)
+      if (e instanceof SyntaxError) { parser.raise(throwErrorAt, "Error parsing regular expression: " + e.message); }
       throw e
     }
   }
 }
 
-var regexpUnicodeSupport = !!tryCreateRegexp("\uffff", "u")
+var regexpUnicodeSupport = !!tryCreateRegexp("\uffff", "u");
 
 pp$8.readRegexp = function() {
   var this$1 = this;
 
-  var escaped, inClass, start = this.pos
+  var escaped, inClass, start = this.pos;
   for (;;) {
-    if (this$1.pos >= this$1.input.length) this$1.raise(start, "Unterminated regular expression")
-    var ch = this$1.input.charAt(this$1.pos)
-    if (lineBreak.test(ch)) this$1.raise(start, "Unterminated regular expression")
+    if (this$1.pos >= this$1.input.length) { this$1.raise(start, "Unterminated regular expression"); }
+    var ch = this$1.input.charAt(this$1.pos);
+    if (lineBreak.test(ch)) { this$1.raise(start, "Unterminated regular expression"); }
     if (!escaped) {
-      if (ch === "[") inClass = true
-      else if (ch === "]" && inClass) inClass = false
-      else if (ch === "/" && !inClass) break
-      escaped = ch === "\\"
-    } else escaped = false
-    ++this$1.pos
-  }
-  var content = this.input.slice(start, this.pos)
-  ++this.pos
+      if (ch === "[") { inClass = true; }
+      else if (ch === "]" && inClass) { inClass = false; }
+      else if (ch === "/" && !inClass) { break }
+      escaped = ch === "\\";
+    } else { escaped = false; }
+    ++this$1.pos;
+  }
+  var content = this.input.slice(start, this.pos);
+  ++this.pos;
   // Need to use `readWord1` because '\uXXXX' sequences are allowed
   // here (don't ask).
-  var mods = this.readWord1()
-  var tmp = content, tmpFlags = ""
+  var mods = this.readWord1();
+  var tmp = content, tmpFlags = "";
   if (mods) {
-    var validFlags = /^[gim]*$/
-    if (this.options.ecmaVersion >= 6) validFlags = /^[gimuy]*$/
-    if (!validFlags.test(mods)) this.raise(start, "Invalid regular expression flag")
+    var validFlags = /^[gim]*$/;
+    if (this.options.ecmaVersion >= 6) { validFlags = /^[gimuy]*$/; }
+    if (!validFlags.test(mods)) { this.raise(start, "Invalid regular expression flag"); }
     if (mods.indexOf("u") >= 0) {
       if (regexpUnicodeSupport) {
-        tmpFlags = "u"
+        tmpFlags = "u";
       } else {
         // Replace each astral symbol and every Unicode escape sequence that
         // possibly represents an astral symbol or a paired surrogate with a
@@ -3244,27 +3314,27 @@ pp$8.readRegexp = function() {
         // perfectly valid pattern that is equivalent to `[a-b]`, but it would
         // be replaced by `[x-b]` which throws an error.
         tmp = tmp.replace(/\\u\{([0-9a-fA-F]+)\}/g, function (_match, code, offset) {
-          code = Number("0x" + code)
-          if (code > 0x10FFFF) this$1.raise(start + offset + 3, "Code point out of bounds")
+          code = Number("0x" + code);
+          if (code > 0x10FFFF) { this$1.raise(start + offset + 3, "Code point out of bounds"); }
           return "x"
-        })
-        tmp = tmp.replace(/\\u([a-fA-F0-9]{4})|[\uD800-\uDBFF][\uDC00-\uDFFF]/g, "x")
-        tmpFlags = tmpFlags.replace("u", "")
+        });
+        tmp = tmp.replace(/\\u([a-fA-F0-9]{4})|[\uD800-\uDBFF][\uDC00-\uDFFF]/g, "x");
+        tmpFlags = tmpFlags.replace("u", "");
       }
     }
   }
   // Detect invalid regular expressions.
-  var value = null
+  var value = null;
   // Rhino's regular expression parser is flaky and throws uncatchable exceptions,
   // so don't do detection if we are running under Rhino
   if (!isRhino) {
-    tryCreateRegexp(tmp, tmpFlags, start, this)
+    tryCreateRegexp(tmp, tmpFlags, start, this);
     // Get a regular expression object for this pattern-flag pair, or `null` in
     // case the current environment doesn't support the flags it uses.
-    value = tryCreateRegexp(content, mods)
+    value = tryCreateRegexp(content, mods);
   }
-  return this.finishToken(tt.regexp, {pattern: content, flags: mods, value: value})
-}
+  return this.finishToken(types.regexp, {pattern: content, flags: mods, value: value})
+};
 
 // Read an integer in the given radix. Return null if zero digits
 // were read, the integer value otherwise. When `len` is given, this
@@ -3273,159 +3343,210 @@ pp$8.readRegexp = function() {
 pp$8.readInt = function(radix, len) {
   var this$1 = this;
 
-  var start = this.pos, total = 0
+  var start = this.pos, total = 0;
   for (var i = 0, e = len == null ? Infinity : len; i < e; ++i) {
-    var code = this$1.input.charCodeAt(this$1.pos), val
-    if (code >= 97) val = code - 97 + 10 // a
-    else if (code >= 65) val = code - 65 + 10 // A
-    else if (code >= 48 && code <= 57) val = code - 48 // 0-9
-    else val = Infinity
-    if (val >= radix) break
-    ++this$1.pos
-    total = total * radix + val
+    var code = this$1.input.charCodeAt(this$1.pos), val = (void 0);
+    if (code >= 97) { val = code - 97 + 10; } // a
+    else if (code >= 65) { val = code - 65 + 10; } // A
+    else if (code >= 48 && code <= 57) { val = code - 48; } // 0-9
+    else { val = Infinity; }
+    if (val >= radix) { break }
+    ++this$1.pos;
+    total = total * radix + val;
   }
-  if (this.pos === start || len != null && this.pos - start !== len) return null
+  if (this.pos === start || len != null && this.pos - start !== len) { return null }
 
   return total
-}
+};
 
 pp$8.readRadixNumber = function(radix) {
-  this.pos += 2 // 0x
-  var val = this.readInt(radix)
-  if (val == null) this.raise(this.start + 2, "Expected number in radix " + radix)
-  if (isIdentifierStart(this.fullCharCodeAtPos())) this.raise(this.pos, "Identifier directly after number")
-  return this.finishToken(tt.num, val)
-}
+  this.pos += 2; // 0x
+  var val = this.readInt(radix);
+  if (val == null) { this.raise(this.start + 2, "Expected number in radix " + radix); }
+  if (isIdentifierStart(this.fullCharCodeAtPos())) { this.raise(this.pos, "Identifier directly after number"); }
+  return this.finishToken(types.num, val)
+};
 
 // Read an integer, octal integer, or floating-point number.
 
 pp$8.readNumber = function(startsWithDot) {
-  var start = this.pos, isFloat = false, octal = this.input.charCodeAt(this.pos) === 48
-  if (!startsWithDot && this.readInt(10) === null) this.raise(start, "Invalid number")
-  if (octal && this.pos == start + 1) octal = false
-  var next = this.input.charCodeAt(this.pos)
+  var start = this.pos, isFloat = false, octal = this.input.charCodeAt(this.pos) === 48;
+  if (!startsWithDot && this.readInt(10) === null) { this.raise(start, "Invalid number"); }
+  if (octal && this.pos == start + 1) { octal = false; }
+  var next = this.input.charCodeAt(this.pos);
   if (next === 46 && !octal) { // '.'
-    ++this.pos
-    this.readInt(10)
-    isFloat = true
-    next = this.input.charCodeAt(this.pos)
+    ++this.pos;
+    this.readInt(10);
+    isFloat = true;
+    next = this.input.charCodeAt(this.pos);
   }
   if ((next === 69 || next === 101) && !octal) { // 'eE'
-    next = this.input.charCodeAt(++this.pos)
-    if (next === 43 || next === 45) ++this.pos // '+-'
-    if (this.readInt(10) === null) this.raise(start, "Invalid number")
-    isFloat = true
-  }
-  if (isIdentifierStart(this.fullCharCodeAtPos())) this.raise(this.pos, "Identifier directly after number")
-
-  var str = this.input.slice(start, this.pos), val
-  if (isFloat) val = parseFloat(str)
-  else if (!octal || str.length === 1) val = parseInt(str, 10)
-  else if (/[89]/.test(str) || this.strict) this.raise(start, "Invalid number")
-  else val = parseInt(str, 8)
-  return this.finishToken(tt.num, val)
-}
+    next = this.input.charCodeAt(++this.pos);
+    if (next === 43 || next === 45) { ++this.pos; } // '+-'
+    if (this.readInt(10) === null) { this.raise(start, "Invalid number"); }
+    isFloat = true;
+  }
+  if (isIdentifierStart(this.fullCharCodeAtPos())) { this.raise(this.pos, "Identifier directly after number"); }
+
+  var str = this.input.slice(start, this.pos), val;
+  if (isFloat) { val = parseFloat(str); }
+  else if (!octal || str.length === 1) { val = parseInt(str, 10); }
+  else if (this.strict) { this.raise(start, "Invalid number"); }
+  else if (/[89]/.test(str)) { val = parseInt(str, 10); }
+  else { val = parseInt(str, 8); }
+  return this.finishToken(types.num, val)
+};
 
 // Read a string value, interpreting backslash-escapes.
 
 pp$8.readCodePoint = function() {
-  var ch = this.input.charCodeAt(this.pos), code
-
-  if (ch === 123) {
-    if (this.options.ecmaVersion < 6) this.unexpected()
-    var codePos = ++this.pos
-    code = this.readHexChar(this.input.indexOf("}", this.pos) - this.pos)
-    ++this.pos
-    if (code > 0x10FFFF) this.raise(codePos, "Code point out of bounds")
+  var ch = this.input.charCodeAt(this.pos), code;
+
+  if (ch === 123) { // '{'
+    if (this.options.ecmaVersion < 6) { this.unexpected(); }
+    var codePos = ++this.pos;
+    code = this.readHexChar(this.input.indexOf("}", this.pos) - this.pos);
+    ++this.pos;
+    if (code > 0x10FFFF) { this.invalidStringToken(codePos, "Code point out of bounds"); }
   } else {
-    code = this.readHexChar(4)
+    code = this.readHexChar(4);
   }
   return code
-}
+};
 
 function codePointToString(code) {
   // UTF-16 Decoding
-  if (code <= 0xFFFF) return String.fromCharCode(code)
-  code -= 0x10000
+  if (code <= 0xFFFF) { return String.fromCharCode(code) }
+  code -= 0x10000;
   return String.fromCharCode((code >> 10) + 0xD800, (code & 1023) + 0xDC00)
 }
 
 pp$8.readString = function(quote) {
   var this$1 = this;
 
-  var out = "", chunkStart = ++this.pos
+  var out = "", chunkStart = ++this.pos;
   for (;;) {
-    if (this$1.pos >= this$1.input.length) this$1.raise(this$1.start, "Unterminated string constant")
-    var ch = this$1.input.charCodeAt(this$1.pos)
-    if (ch === quote) break
+    if (this$1.pos >= this$1.input.length) { this$1.raise(this$1.start, "Unterminated string constant"); }
+    var ch = this$1.input.charCodeAt(this$1.pos);
+    if (ch === quote) { break }
     if (ch === 92) { // '\'
-      out += this$1.input.slice(chunkStart, this$1.pos)
-      out += this$1.readEscapedChar(false)
-      chunkStart = this$1.pos
+      out += this$1.input.slice(chunkStart, this$1.pos);
+      out += this$1.readEscapedChar(false);
+      chunkStart = this$1.pos;
     } else {
-      if (isNewLine(ch)) this$1.raise(this$1.start, "Unterminated string constant")
-      ++this$1.pos
+      if (isNewLine(ch)) { this$1.raise(this$1.start, "Unterminated string constant"); }
+      ++this$1.pos;
     }
   }
-  out += this.input.slice(chunkStart, this.pos++)
-  return this.finishToken(tt.string, out)
-}
+  out += this.input.slice(chunkStart, this.pos++);
+  return this.finishToken(types.string, out)
+};
 
 // Reads template string tokens.
 
+var INVALID_TEMPLATE_ESCAPE_ERROR = {};
+
+pp$8.tryReadTemplateToken = function() {
+  this.inTemplateElement = true;
+  try {
+    this.readTmplToken();
+  } catch (err) {
+    if (err === INVALID_TEMPLATE_ESCAPE_ERROR) {
+      this.readInvalidTemplateToken();
+    } else {
+      throw err
+    }
+  }
+
+  this.inTemplateElement = false;
+};
+
+pp$8.invalidStringToken = function(position, message) {
+  if (this.inTemplateElement && this.options.ecmaVersion >= 9) {
+    throw INVALID_TEMPLATE_ESCAPE_ERROR
+  } else {
+    this.raise(position, message);
+  }
+};
+
 pp$8.readTmplToken = function() {
   var this$1 = this;
 
-  var out = "", chunkStart = this.pos
+  var out = "", chunkStart = this.pos;
   for (;;) {
-    if (this$1.pos >= this$1.input.length) this$1.raise(this$1.start, "Unterminated template")
-    var ch = this$1.input.charCodeAt(this$1.pos)
+    if (this$1.pos >= this$1.input.length) { this$1.raise(this$1.start, "Unterminated template"); }
+    var ch = this$1.input.charCodeAt(this$1.pos);
     if (ch === 96 || ch === 36 && this$1.input.charCodeAt(this$1.pos + 1) === 123) { // '`', '${'
-      if (this$1.pos === this$1.start && this$1.type === tt.template) {
+      if (this$1.pos === this$1.start && (this$1.type === types.template || this$1.type === types.invalidTemplate)) {
         if (ch === 36) {
-          this$1.pos += 2
-          return this$1.finishToken(tt.dollarBraceL)
+          this$1.pos += 2;
+          return this$1.finishToken(types.dollarBraceL)
         } else {
-          ++this$1.pos
-          return this$1.finishToken(tt.backQuote)
+          ++this$1.pos;
+          return this$1.finishToken(types.backQuote)
         }
       }
-      out += this$1.input.slice(chunkStart, this$1.pos)
-      return this$1.finishToken(tt.template, out)
+      out += this$1.input.slice(chunkStart, this$1.pos);
+      return this$1.finishToken(types.template, out)
     }
     if (ch === 92) { // '\'
-      out += this$1.input.slice(chunkStart, this$1.pos)
-      out += this$1.readEscapedChar(true)
-      chunkStart = this$1.pos
+      out += this$1.input.slice(chunkStart, this$1.pos);
+      out += this$1.readEscapedChar(true);
+      chunkStart = this$1.pos;
     } else if (isNewLine(ch)) {
-      out += this$1.input.slice(chunkStart, this$1.pos)
-      ++this$1.pos
+      out += this$1.input.slice(chunkStart, this$1.pos);
+      ++this$1.pos;
       switch (ch) {
       case 13:
-        if (this$1.input.charCodeAt(this$1.pos) === 10) ++this$1.pos
+        if (this$1.input.charCodeAt(this$1.pos) === 10) { ++this$1.pos; }
       case 10:
-        out += "\n"
+        out += "\n";
         break
       default:
-        out += String.fromCharCode(ch)
+        out += String.fromCharCode(ch);
         break
       }
       if (this$1.options.locations) {
-        ++this$1.curLine
-        this$1.lineStart = this$1.pos
+        ++this$1.curLine;
+        this$1.lineStart = this$1.pos;
       }
-      chunkStart = this$1.pos
+      chunkStart = this$1.pos;
     } else {
-      ++this$1.pos
+      ++this$1.pos;
     }
   }
-}
+};
+
+// Reads a template token to search for the end, without validating any escape sequences
+pp$8.readInvalidTemplateToken = function() {
+  var this$1 = this;
+
+  for (; this.pos < this.input.length; this.pos++) {
+    switch (this$1.input[this$1.pos]) {
+    case "\\":
+      ++this$1.pos;
+      break
+
+    case "$":
+      if (this$1.input[this$1.pos + 1] !== "{") {
+        break
+      }
+    // falls through
+
+    case "`":
+      return this$1.finishToken(types.invalidTemplate, this$1.input.slice(this$1.start, this$1.pos))
+
+    // no default
+    }
+  }
+  this.raise(this.start, "Unterminated template");
+};
 
 // Used to read escaped characters
 
 pp$8.readEscapedChar = function(inTemplate) {
-  var ch = this.input.charCodeAt(++this.pos)
-  ++this.pos
+  var ch = this.input.charCodeAt(++this.pos);
+  ++this.pos;
   switch (ch) {
   case 110: return "\n" // 'n' -> '\n'
   case 114: return "\r" // 'r' -> '\r'
@@ -3435,36 +3556,36 @@ pp$8.readEscapedChar = function(inTemplate) {
   case 98: return "\b" // 'b' -> '\b'
   case 118: return "\u000b" // 'v' -> '\u000b'
   case 102: return "\f" // 'f' -> '\f'
-  case 13: if (this.input.charCodeAt(this.pos) === 10) ++this.pos // '\r\n'
+  case 13: if (this.input.charCodeAt(this.pos) === 10) { ++this.pos; } // '\r\n'
   case 10: // ' \n'
-    if (this.options.locations) { this.lineStart = this.pos; ++this.curLine }
+    if (this.options.locations) { this.lineStart = this.pos; ++this.curLine; }
     return ""
   default:
     if (ch >= 48 && ch <= 55) {
-      var octalStr = this.input.substr(this.pos - 1, 3).match(/^[0-7]+/)[0]
-      var octal = parseInt(octalStr, 8)
+      var octalStr = this.input.substr(this.pos - 1, 3).match(/^[0-7]+/)[0];
+      var octal = parseInt(octalStr, 8);
       if (octal > 255) {
-        octalStr = octalStr.slice(0, -1)
-        octal = parseInt(octalStr, 8)
+        octalStr = octalStr.slice(0, -1);
+        octal = parseInt(octalStr, 8);
       }
       if (octalStr !== "0" && (this.strict || inTemplate)) {
-        this.raise(this.pos - 2, "Octal literal in strict mode")
+        this.invalidStringToken(this.pos - 2, "Octal literal in strict mode");
       }
-      this.pos += octalStr.length - 1
+      this.pos += octalStr.length - 1;
       return String.fromCharCode(octal)
     }
     return String.fromCharCode(ch)
   }
-}
+};
 
 // Used to read character escape sequences ('\x', '\u', '\U').
 
 pp$8.readHexChar = function(len) {
-  var codePos = this.pos
-  var n = this.readInt(16, len)
-  if (n === null) this.raise(codePos, "Bad character escape sequence")
+  var codePos = this.pos;
+  var n = this.readInt(16, len);
+  if (n === null) { this.invalidStringToken(codePos, "Bad character escape sequence"); }
   return n
-}
+};
 
 // Read an identifier, and return it as a string. Sets `this.containsEsc`
 // to whether the word contained a '\u' escape.
@@ -3475,45 +3596,45 @@ pp$8.readHexChar = function(len) {
 pp$8.readWord1 = function() {
   var this$1 = this;
 
-  this.containsEsc = false
-  var word = "", first = true, chunkStart = this.pos
-  var astral = this.options.ecmaVersion >= 6
+  this.containsEsc = false;
+  var word = "", first = true, chunkStart = this.pos;
+  var astral = this.options.ecmaVersion >= 6;
   while (this.pos < this.input.length) {
-    var ch = this$1.fullCharCodeAtPos()
+    var ch = this$1.fullCharCodeAtPos();
     if (isIdentifierChar(ch, astral)) {
-      this$1.pos += ch <= 0xffff ? 1 : 2
+      this$1.pos += ch <= 0xffff ? 1 : 2;
     } else if (ch === 92) { // "\"
-      this$1.containsEsc = true
-      word += this$1.input.slice(chunkStart, this$1.pos)
-      var escStart = this$1.pos
+      this$1.containsEsc = true;
+      word += this$1.input.slice(chunkStart, this$1.pos);
+      var escStart = this$1.pos;
       if (this$1.input.charCodeAt(++this$1.pos) != 117) // "u"
-        this$1.raise(this$1.pos, "Expecting Unicode escape sequence \\uXXXX")
-      ++this$1.pos
-      var esc = this$1.readCodePoint()
+        { this$1.invalidStringToken(this$1.pos, "Expecting Unicode escape sequence \\uXXXX"); }
+      ++this$1.pos;
+      var esc = this$1.readCodePoint();
       if (!(first ? isIdentifierStart : isIdentifierChar)(esc, astral))
-        this$1.raise(escStart, "Invalid Unicode escape")
-      word += codePointToString(esc)
-      chunkStart = this$1.pos
+        { this$1.invalidStringToken(escStart, "Invalid Unicode escape"); }
+      word += codePointToString(esc);
+      chunkStart = this$1.pos;
     } else {
       break
     }
-    first = false
+    first = false;
   }
   return word + this.input.slice(chunkStart, this.pos)
-}
+};
 
 // Read an identifier or keyword token. Will check for reserved
 // words when necessary.
 
 pp$8.readWord = function() {
-  var word = this.readWord1()
-  var type = tt.name
+  var word = this.readWord1();
+  var type = types.name;
   if (this.keywords.test(word)) {
-    if (this.containsEsc) this.raiseRecoverable(this.start, "Escape sequence in keyword " + word)
-    type = keywordTypes[word]
+    if (this.containsEsc) { this.raiseRecoverable(this.start, "Escape sequence in keyword " + word); }
+    type = keywords$1[word];
   }
   return this.finishToken(type, word)
-}
+};
 
 // Acorn is a tiny, fast JavaScript parser written in JavaScript.
 //
@@ -3536,7 +3657,7 @@ pp$8.readWord = function() {
 // [dammit]: acorn_loose.js
 // [walk]: util/walk.js
 
-var version = "5.0.3"
+var version = "5.1.1";
 
 // The main exported interface (under `self.acorn` when in the
 // browser) is a `parse` function that takes a code string and
@@ -3554,8 +3675,8 @@ function parse(input, options) {
 // that embed JavaScript expressions.
 
 function parseExpressionAt(input, pos, options) {
-  var p = new Parser(options, input, pos)
-  p.nextToken()
+  var p = new Parser(options, input, pos);
+  p.nextToken();
   return p.parseExpression()
 }
 
@@ -3569,11 +3690,11 @@ function tokenizer(input, options) {
 // This is a terrible kludge to support the existing, pre-ES6
 // interface where the loose parser module retroactively adds exports
 // to this module.
-// eslint-disable-line camelcase
-function addLooseExports(parse, Parser, plugins) {
-  exports.parse_dammit = parse // eslint-disable-line camelcase
-  exports.LooseParser = Parser
-  exports.pluginsLoose = plugins
+ // eslint-disable-line camelcase
+function addLooseExports(parse, Parser$$1, plugins$$1) {
+  exports.parse_dammit = parse; // eslint-disable-line camelcase
+  exports.LooseParser = Parser$$1;
+  exports.pluginsLoose = plugins$$1;
 }
 
 exports.version = version;
@@ -3589,10 +3710,10 @@ exports.SourceLocation = SourceLocation;
 exports.getLineInfo = getLineInfo;
 exports.Node = Node;
 exports.TokenType = TokenType;
-exports.tokTypes = tt;
-exports.keywordTypes = keywordTypes;
+exports.tokTypes = types;
+exports.keywordTypes = keywords$1;
 exports.TokContext = TokContext;
-exports.tokContexts = types;
+exports.tokContexts = types$1;
 exports.isIdentifierChar = isIdentifierChar;
 exports.isIdentifierStart = isIdentifierStart;
 exports.Token = Token;
@@ -3603,4 +3724,4 @@ exports.nonASCIIwhitespace = nonASCIIwhitespace;
 
 Object.defineProperty(exports, '__esModule', { value: true });
 
-})));
-\ No newline at end of file
+})));
diff --git a/node_modules/acorn/dist/acorn_loose.es.js b/node_modules/acorn/dist/acorn_loose.es.js
index 11813609a..449afc889 100644
--- a/node_modules/acorn/dist/acorn_loose.es.js
+++ b/node_modules/acorn/dist/acorn_loose.es.js
@@ -1,28 +1,28 @@
-import { defaultOptions, addLooseExports, SourceLocation, tokTypes, tokenizer, Node, lineBreak, isNewLine, getLineInfo, Token, lineBreakG } from './acorn';
+import { Node, SourceLocation, Token, addLooseExports, defaultOptions, getLineInfo, isNewLine, lineBreak, lineBreakG, tokTypes, tokenizer } from './acorn.es';
 
 // Registered plugins
-var pluginsLoose = {}
+var pluginsLoose = {};
 
 var LooseParser = function LooseParser(input, options) {
   if ( options === void 0 ) options = {};
 
-  this.toks = tokenizer(input, options)
-  this.options = this.toks.options
-  this.input = this.toks.input
-  this.tok = this.last = {type: tokTypes.eof, start: 0, end: 0}
+  this.toks = tokenizer(input, options);
+  this.options = this.toks.options;
+  this.input = this.toks.input;
+  this.tok = this.last = {type: tokTypes.eof, start: 0, end: 0};
   if (this.options.locations) {
-    var here = this.toks.curPosition()
-    this.tok.loc = new SourceLocation(this.toks, here, here)
+    var here = this.toks.curPosition();
+    this.tok.loc = new SourceLocation(this.toks, here, here);
   }
-  this.ahead = [] // Tokens ahead
-  this.context = [] // Indentation contexted
-  this.curIndent = 0
-  this.curLineStart = 0
-  this.nextLineStart = this.lineEnd(this.curLineStart) + 1
-  this.inAsync = false
+  this.ahead = []; // Tokens ahead
+  this.context = []; // Indentation contexted
+  this.curIndent = 0;
+  this.curLineStart = 0;
+  this.nextLineStart = this.lineEnd(this.curLineStart) + 1;
+  this.inAsync = false;
   // Load plugins
-  this.options.pluginsLoose = options.pluginsLoose || {}
-  this.loadPlugins(this.options.pluginsLoose)
+  this.options.pluginsLoose = options.pluginsLoose || {};
+  this.loadPlugins(this.options.pluginsLoose);
 };
 
 LooseParser.prototype.startNode = function startNode () {
@@ -42,42 +42,42 @@ LooseParser.prototype.startNodeAt = function startNodeAt (pos) {
 };
 
 LooseParser.prototype.finishNode = function finishNode (node, type) {
-  node.type = type
-  node.end = this.last.end
+  node.type = type;
+  node.end = this.last.end;
   if (this.options.locations)
-    node.loc.end = this.last.loc.end
+    { node.loc.end = this.last.loc.end; }
   if (this.options.ranges)
-    node.range[1] = this.last.end
+    { node.range[1] = this.last.end; }
   return node
 };
 
 LooseParser.prototype.dummyNode = function dummyNode (type) {
-  var dummy = this.startNode()
-  dummy.type = type
-  dummy.end = dummy.start
+  var dummy = this.startNode();
+  dummy.type = type;
+  dummy.end = dummy.start;
   if (this.options.locations)
-    dummy.loc.end = dummy.loc.start
+    { dummy.loc.end = dummy.loc.start; }
   if (this.options.ranges)
-    dummy.range[1] = dummy.start
-  this.last = {type: tokTypes.name, start: dummy.start, end: dummy.start, loc: dummy.loc}
+    { dummy.range[1] = dummy.start; }
+  this.last = {type: tokTypes.name, start: dummy.start, end: dummy.start, loc: dummy.loc};
   return dummy
 };
 
 LooseParser.prototype.dummyIdent = function dummyIdent () {
-  var dummy = this.dummyNode("Identifier")
-  dummy.name = "✖"
+  var dummy = this.dummyNode("Identifier");
+  dummy.name = "✖";
   return dummy
 };
 
 LooseParser.prototype.dummyString = function dummyString () {
-  var dummy = this.dummyNode("Literal")
-  dummy.value = dummy.raw = "✖"
+  var dummy = this.dummyNode("Literal");
+  dummy.value = dummy.raw = "✖";
   return dummy
 };
 
 LooseParser.prototype.eat = function eat (type) {
   if (this.tok.type === type) {
-    this.next()
+    this.next();
     return true
   } else {
     return false
@@ -104,25 +104,25 @@ LooseParser.prototype.semicolon = function semicolon () {
 LooseParser.prototype.expect = function expect (type) {
     var this$1 = this;
 
-  if (this.eat(type)) return true
+  if (this.eat(type)) { return true }
   for (var i = 1; i <= 2; i++) {
     if (this$1.lookAhead(i).type == type) {
-      for (var j = 0; j < i; j++) this$1.next()
+      for (var j = 0; j < i; j++) { this$1.next(); }
       return true
     }
   }
 };
 
 LooseParser.prototype.pushCx = function pushCx () {
-  this.context.push(this.curIndent)
+  this.context.push(this.curIndent);
 };
 
 LooseParser.prototype.popCx = function popCx () {
-  this.curIndent = this.context.pop()
+  this.curIndent = this.context.pop();
 };
 
 LooseParser.prototype.lineEnd = function lineEnd (pos) {
-  while (pos < this.input.length && !isNewLine(this.input.charCodeAt(pos))) ++pos
+  while (pos < this.input.length && !isNewLine(this.input.charCodeAt(pos))) { ++pos; }
   return pos
 };
 
@@ -130,15 +130,15 @@ LooseParser.prototype.indentationAfter = function indentationAfter (pos) {
     var this$1 = this;
 
   for (var count = 0;; ++pos) {
-    var ch = this$1.input.charCodeAt(pos)
-    if (ch === 32) ++count
-    else if (ch === 9) count += this$1.options.tabSize
-    else return count
+    var ch = this$1.input.charCodeAt(pos);
+    if (ch === 32) { ++count; }
+    else if (ch === 9) { count += this$1.options.tabSize; }
+    else { return count }
   }
 };
 
 LooseParser.prototype.closes = function closes (closeTok, indent, line, blockHeuristic) {
-  if (this.tok.type === closeTok || this.tok.type === tokTypes.eof) return true
+  if (this.tok.type === closeTok || this.tok.type === tokTypes.eof) { return true }
   return line != this.curLineStart && this.curIndent < indent && this.tokenStartsLine() &&
     (!blockHeuristic || this.nextLineStart >= this.input.length ||
      this.indentationAfter(this.nextLineStart) < indent)
@@ -148,27 +148,32 @@ LooseParser.prototype.tokenStartsLine = function tokenStartsLine () {
     var this$1 = this;
 
   for (var p = this.tok.start - 1; p >= this.curLineStart; --p) {
-    var ch = this$1.input.charCodeAt(p)
-    if (ch !== 9 && ch !== 32) return false
+    var ch = this$1.input.charCodeAt(p);
+    if (ch !== 9 && ch !== 32) { return false }
   }
   return true
 };
 
 LooseParser.prototype.extend = function extend (name, f) {
-  this[name] = f(this[name])
+  this[name] = f(this[name]);
 };
 
 LooseParser.prototype.loadPlugins = function loadPlugins (pluginConfigs) {
     var this$1 = this;
 
   for (var name in pluginConfigs) {
-    var plugin = pluginsLoose[name]
-    if (!plugin) throw new Error("Plugin '" + name + "' not found")
-    plugin(this$1, pluginConfigs[name])
+    var plugin = pluginsLoose[name];
+    if (!plugin) { throw new Error("Plugin '" + name + "' not found") }
+    plugin(this$1, pluginConfigs[name]);
   }
 };
 
-var lp = LooseParser.prototype
+LooseParser.prototype.parse = function parse () {
+  this.next();
+  return this.parseTopLevel()
+};
+
+var lp = LooseParser.prototype;
 
 function isSpace(ch) {
   return (ch < 14 && ch > 8) || ch === 32 || ch === 160 || isNewLine(ch)
@@ -177,254 +182,254 @@ function isSpace(ch) {
 lp.next = function() {
   var this$1 = this;
 
-  this.last = this.tok
+  this.last = this.tok;
   if (this.ahead.length)
-    this.tok = this.ahead.shift()
+    { this.tok = this.ahead.shift(); }
   else
-    this.tok = this.readToken()
+    { this.tok = this.readToken(); }
 
   if (this.tok.start >= this.nextLineStart) {
     while (this.tok.start >= this.nextLineStart) {
-      this$1.curLineStart = this$1.nextLineStart
-      this$1.nextLineStart = this$1.lineEnd(this$1.curLineStart) + 1
+      this$1.curLineStart = this$1.nextLineStart;
+      this$1.nextLineStart = this$1.lineEnd(this$1.curLineStart) + 1;
     }
-    this.curIndent = this.indentationAfter(this.curLineStart)
+    this.curIndent = this.indentationAfter(this.curLineStart);
   }
-}
+};
 
 lp.readToken = function() {
   var this$1 = this;
 
   for (;;) {
     try {
-      this$1.toks.next()
+      this$1.toks.next();
       if (this$1.toks.type === tokTypes.dot &&
           this$1.input.substr(this$1.toks.end, 1) === "." &&
           this$1.options.ecmaVersion >= 6) {
-        this$1.toks.end++
-        this$1.toks.type = tokTypes.ellipsis
+        this$1.toks.end++;
+        this$1.toks.type = tokTypes.ellipsis;
       }
       return new Token(this$1.toks)
     } catch (e) {
-      if (!(e instanceof SyntaxError)) throw e
+      if (!(e instanceof SyntaxError)) { throw e }
 
       // Try to skip some text, based on the error message, and then continue
-      var msg = e.message, pos = e.raisedAt, replace = true
+      var msg = e.message, pos = e.raisedAt, replace = true;
       if (/unterminated/i.test(msg)) {
-        pos = this$1.lineEnd(e.pos + 1)
+        pos = this$1.lineEnd(e.pos + 1);
         if (/string/.test(msg)) {
-          replace = {start: e.pos, end: pos, type: tokTypes.string, value: this$1.input.slice(e.pos + 1, pos)}
+          replace = {start: e.pos, end: pos, type: tokTypes.string, value: this$1.input.slice(e.pos + 1, pos)};
         } else if (/regular expr/i.test(msg)) {
-          var re = this$1.input.slice(e.pos, pos)
-          try { re = new RegExp(re) } catch (e) { /* ignore compilation error due to new syntax */ }
-          replace = {start: e.pos, end: pos, type: tokTypes.regexp, value: re}
+          var re = this$1.input.slice(e.pos, pos);
+          try { re = new RegExp(re); } catch (e) { /* ignore compilation error due to new syntax */ }
+          replace = {start: e.pos, end: pos, type: tokTypes.regexp, value: re};
         } else if (/template/.test(msg)) {
           replace = {
             start: e.pos,
             end: pos,
             type: tokTypes.template,
             value: this$1.input.slice(e.pos, pos)
-          }
+          };
         } else {
-          replace = false
+          replace = false;
         }
       } else if (/invalid (unicode|regexp|number)|expecting unicode|octal literal|is reserved|directly after number|expected number in radix/i.test(msg)) {
-        while (pos < this.input.length && !isSpace(this.input.charCodeAt(pos))) ++pos
+        while (pos < this.input.length && !isSpace(this.input.charCodeAt(pos))) { ++pos; }
       } else if (/character escape|expected hexadecimal/i.test(msg)) {
         while (pos < this.input.length) {
-          var ch = this$1.input.charCodeAt(pos++)
-          if (ch === 34 || ch === 39 || isNewLine(ch)) break
+          var ch = this$1.input.charCodeAt(pos++);
+          if (ch === 34 || ch === 39 || isNewLine(ch)) { break }
         }
       } else if (/unexpected character/i.test(msg)) {
-        pos++
-        replace = false
+        pos++;
+        replace = false;
       } else if (/regular expression/i.test(msg)) {
-        replace = true
+        replace = true;
       } else {
         throw e
       }
-      this$1.resetTo(pos)
-      if (replace === true) replace = {start: pos, end: pos, type: tokTypes.name, value: "✖"}
+      this$1.resetTo(pos);
+      if (replace === true) { replace = {start: pos, end: pos, type: tokTypes.name, value: "✖"}; }
       if (replace) {
         if (this$1.options.locations)
-          replace.loc = new SourceLocation(
+          { replace.loc = new SourceLocation(
             this$1.toks,
             getLineInfo(this$1.input, replace.start),
-            getLineInfo(this$1.input, replace.end))
+            getLineInfo(this$1.input, replace.end)); }
         return replace
       }
     }
   }
-}
+};
 
 lp.resetTo = function(pos) {
   var this$1 = this;
 
-  this.toks.pos = pos
-  var ch = this.input.charAt(pos - 1)
+  this.toks.pos = pos;
+  var ch = this.input.charAt(pos - 1);
   this.toks.exprAllowed = !ch || /[[{(,;:?/*=+\-~!|&%^<>]/.test(ch) ||
     /[enwfd]/.test(ch) &&
-    /\b(keywords|case|else|return|throw|new|in|(instance|type)of|delete|void)$/.test(this.input.slice(pos - 10, pos))
+    /\b(keywords|case|else|return|throw|new|in|(instance|type)of|delete|void)$/.test(this.input.slice(pos - 10, pos));
 
   if (this.options.locations) {
-    this.toks.curLine = 1
-    this.toks.lineStart = lineBreakG.lastIndex = 0
-    var match
+    this.toks.curLine = 1;
+    this.toks.lineStart = lineBreakG.lastIndex = 0;
+    var match;
     while ((match = lineBreakG.exec(this.input)) && match.index < pos) {
-      ++this$1.toks.curLine
-      this$1.toks.lineStart = match.index + match[0].length
+      ++this$1.toks.curLine;
+      this$1.toks.lineStart = match.index + match[0].length;
     }
   }
-}
+};
 
 lp.lookAhead = function(n) {
   var this$1 = this;
 
   while (n > this.ahead.length)
-    this$1.ahead.push(this$1.readToken())
+    { this$1.ahead.push(this$1.readToken()); }
   return this.ahead[n - 1]
-}
+};
 
 function isDummy(node) { return node.name == "✖" }
 
-var lp$1 = LooseParser.prototype
+var lp$1 = LooseParser.prototype;
 
 lp$1.parseTopLevel = function() {
   var this$1 = this;
 
-  var node = this.startNodeAt(this.options.locations ? [0, getLineInfo(this.input, 0)] : 0)
-  node.body = []
-  while (this.tok.type !== tokTypes.eof) node.body.push(this$1.parseStatement())
-  this.last = this.tok
+  var node = this.startNodeAt(this.options.locations ? [0, getLineInfo(this.input, 0)] : 0);
+  node.body = [];
+  while (this.tok.type !== tokTypes.eof) { node.body.push(this$1.parseStatement()); }
+  this.last = this.tok;
   if (this.options.ecmaVersion >= 6) {
-    node.sourceType = this.options.sourceType
+    node.sourceType = this.options.sourceType;
   }
   return this.finishNode(node, "Program")
-}
+};
 
 lp$1.parseStatement = function() {
   var this$1 = this;
 
-  var starttype = this.tok.type, node = this.startNode(), kind
+  var starttype = this.tok.type, node = this.startNode(), kind;
 
   if (this.toks.isLet()) {
-    starttype = tokTypes._var
-    kind = "let"
+    starttype = tokTypes._var;
+    kind = "let";
   }
 
   switch (starttype) {
   case tokTypes._break: case tokTypes._continue:
-    this.next()
-    var isBreak = starttype === tokTypes._break
+    this.next();
+    var isBreak = starttype === tokTypes._break;
     if (this.semicolon() || this.canInsertSemicolon()) {
-      node.label = null
+      node.label = null;
     } else {
-      node.label = this.tok.type === tokTypes.name ? this.parseIdent() : null
-      this.semicolon()
+      node.label = this.tok.type === tokTypes.name ? this.parseIdent() : null;
+      this.semicolon();
     }
     return this.finishNode(node, isBreak ? "BreakStatement" : "ContinueStatement")
 
   case tokTypes._debugger:
-    this.next()
-    this.semicolon()
+    this.next();
+    this.semicolon();
     return this.finishNode(node, "DebuggerStatement")
 
   case tokTypes._do:
-    this.next()
-    node.body = this.parseStatement()
-    node.test = this.eat(tokTypes._while) ? this.parseParenExpression() : this.dummyIdent()
-    this.semicolon()
+    this.next();
+    node.body = this.parseStatement();
+    node.test = this.eat(tokTypes._while) ? this.parseParenExpression() : this.dummyIdent();
+    this.semicolon();
     return this.finishNode(node, "DoWhileStatement")
 
   case tokTypes._for:
-    this.next()
-    this.pushCx()
-    this.expect(tokTypes.parenL)
-    if (this.tok.type === tokTypes.semi) return this.parseFor(node, null)
-    var isLet = this.toks.isLet()
+    this.next();
+    this.pushCx();
+    this.expect(tokTypes.parenL);
+    if (this.tok.type === tokTypes.semi) { return this.parseFor(node, null) }
+    var isLet = this.toks.isLet();
     if (isLet || this.tok.type === tokTypes._var || this.tok.type === tokTypes._const) {
-      var init$1 = this.parseVar(true, isLet ? "let" : this.tok.value)
+      var init$1 = this.parseVar(true, isLet ? "let" : this.tok.value);
       if (init$1.declarations.length === 1 && (this.tok.type === tokTypes._in || this.isContextual("of"))) {
         return this.parseForIn(node, init$1)
       }
       return this.parseFor(node, init$1)
     }
-    var init = this.parseExpression(true)
+    var init = this.parseExpression(true);
     if (this.tok.type === tokTypes._in || this.isContextual("of"))
-      return this.parseForIn(node, this.toAssignable(init))
+      { return this.parseForIn(node, this.toAssignable(init)) }
     return this.parseFor(node, init)
 
   case tokTypes._function:
-    this.next()
+    this.next();
     return this.parseFunction(node, true)
 
   case tokTypes._if:
-    this.next()
-    node.test = this.parseParenExpression()
-    node.consequent = this.parseStatement()
-    node.alternate = this.eat(tokTypes._else) ? this.parseStatement() : null
+    this.next();
+    node.test = this.parseParenExpression();
+    node.consequent = this.parseStatement();
+    node.alternate = this.eat(tokTypes._else) ? this.parseStatement() : null;
     return this.finishNode(node, "IfStatement")
 
   case tokTypes._return:
-    this.next()
-    if (this.eat(tokTypes.semi) || this.canInsertSemicolon()) node.argument = null
-    else { node.argument = this.parseExpression(); this.semicolon() }
+    this.next();
+    if (this.eat(tokTypes.semi) || this.canInsertSemicolon()) { node.argument = null; }
+    else { node.argument = this.parseExpression(); this.semicolon(); }
     return this.finishNode(node, "ReturnStatement")
 
   case tokTypes._switch:
-    var blockIndent = this.curIndent, line = this.curLineStart
-    this.next()
-    node.discriminant = this.parseParenExpression()
-    node.cases = []
-    this.pushCx()
-    this.expect(tokTypes.braceL)
-
-    var cur
+    var blockIndent = this.curIndent, line = this.curLineStart;
+    this.next();
+    node.discriminant = this.parseParenExpression();
+    node.cases = [];
+    this.pushCx();
+    this.expect(tokTypes.braceL);
+
+    var cur;
     while (!this.closes(tokTypes.braceR, blockIndent, line, true)) {
       if (this$1.tok.type === tokTypes._case || this$1.tok.type === tokTypes._default) {
-        var isCase = this$1.tok.type === tokTypes._case
-        if (cur) this$1.finishNode(cur, "SwitchCase")
-        node.cases.push(cur = this$1.startNode())
-        cur.consequent = []
-        this$1.next()
-        if (isCase) cur.test = this$1.parseExpression()
-        else cur.test = null
-        this$1.expect(tokTypes.colon)
+        var isCase = this$1.tok.type === tokTypes._case;
+        if (cur) { this$1.finishNode(cur, "SwitchCase"); }
+        node.cases.push(cur = this$1.startNode());
+        cur.consequent = [];
+        this$1.next();
+        if (isCase) { cur.test = this$1.parseExpression(); }
+        else { cur.test = null; }
+        this$1.expect(tokTypes.colon);
       } else {
         if (!cur) {
-          node.cases.push(cur = this$1.startNode())
-          cur.consequent = []
-          cur.test = null
+          node.cases.push(cur = this$1.startNode());
+          cur.consequent = [];
+          cur.test = null;
         }
-        cur.consequent.push(this$1.parseStatement())
+        cur.consequent.push(this$1.parseStatement());
       }
     }
-    if (cur) this.finishNode(cur, "SwitchCase")
-    this.popCx()
-    this.eat(tokTypes.braceR)
+    if (cur) { this.finishNode(cur, "SwitchCase"); }
+    this.popCx();
+    this.eat(tokTypes.braceR);
     return this.finishNode(node, "SwitchStatement")
 
   case tokTypes._throw:
-    this.next()
-    node.argument = this.parseExpression()
-    this.semicolon()
+    this.next();
+    node.argument = this.parseExpression();
+    this.semicolon();
     return this.finishNode(node, "ThrowStatement")
 
   case tokTypes._try:
-    this.next()
-    node.block = this.parseBlock()
-    node.handler = null
+    this.next();
+    node.block = this.parseBlock();
+    node.handler = null;
     if (this.tok.type === tokTypes._catch) {
-      var clause = this.startNode()
-      this.next()
-      this.expect(tokTypes.parenL)
-      clause.param = this.toAssignable(this.parseExprAtom(), true)
-      this.expect(tokTypes.parenR)
-      clause.body = this.parseBlock()
-      node.handler = this.finishNode(clause, "CatchClause")
+      var clause = this.startNode();
+      this.next();
+      this.expect(tokTypes.parenL);
+      clause.param = this.toAssignable(this.parseExprAtom(), true);
+      this.expect(tokTypes.parenR);
+      clause.body = this.parseBlock();
+      node.handler = this.finishNode(clause, "CatchClause");
     }
-    node.finalizer = this.eat(tokTypes._finally) ? this.parseBlock() : null
-    if (!node.handler && !node.finalizer) return node.block
+    node.finalizer = this.eat(tokTypes._finally) ? this.parseBlock() : null;
+    if (!node.handler && !node.finalizer) { return node.block }
     return this.finishNode(node, "TryStatement")
 
   case tokTypes._var:
@@ -432,22 +437,22 @@ lp$1.parseStatement = function() {
     return this.parseVar(false, kind || this.tok.value)
 
   case tokTypes._while:
-    this.next()
-    node.test = this.parseParenExpression()
-    node.body = this.parseStatement()
+    this.next();
+    node.test = this.parseParenExpression();
+    node.body = this.parseStatement();
     return this.finishNode(node, "WhileStatement")
 
   case tokTypes._with:
-    this.next()
-    node.object = this.parseParenExpression()
-    node.body = this.parseStatement()
+    this.next();
+    node.object = this.parseParenExpression();
+    node.body = this.parseStatement();
     return this.finishNode(node, "WithStatement")
 
   case tokTypes.braceL:
     return this.parseBlock()
 
   case tokTypes.semi:
-    this.next()
+    this.next();
     return this.finishNode(node, "EmptyStatement")
 
   case tokTypes._class:
@@ -461,448 +466,448 @@ lp$1.parseStatement = function() {
 
   default:
     if (this.toks.isAsyncFunction()) {
-      this.next()
-      this.next()
+      this.next();
+      this.next();
       return this.parseFunction(node, true, true)
     }
-    var expr = this.parseExpression()
+    var expr = this.parseExpression();
     if (isDummy(expr)) {
-      this.next()
-      if (this.tok.type === tokTypes.eof) return this.finishNode(node, "EmptyStatement")
+      this.next();
+      if (this.tok.type === tokTypes.eof) { return this.finishNode(node, "EmptyStatement") }
       return this.parseStatement()
     } else if (starttype === tokTypes.name && expr.type === "Identifier" && this.eat(tokTypes.colon)) {
-      node.body = this.parseStatement()
-      node.label = expr
+      node.body = this.parseStatement();
+      node.label = expr;
       return this.finishNode(node, "LabeledStatement")
     } else {
-      node.expression = expr
-      this.semicolon()
+      node.expression = expr;
+      this.semicolon();
       return this.finishNode(node, "ExpressionStatement")
     }
   }
-}
+};
 
 lp$1.parseBlock = function() {
   var this$1 = this;
 
-  var node = this.startNode()
-  this.pushCx()
-  this.expect(tokTypes.braceL)
-  var blockIndent = this.curIndent, line = this.curLineStart
-  node.body = []
+  var node = this.startNode();
+  this.pushCx();
+  this.expect(tokTypes.braceL);
+  var blockIndent = this.curIndent, line = this.curLineStart;
+  node.body = [];
   while (!this.closes(tokTypes.braceR, blockIndent, line, true))
-    node.body.push(this$1.parseStatement())
-  this.popCx()
-  this.eat(tokTypes.braceR)
+    { node.body.push(this$1.parseStatement()); }
+  this.popCx();
+  this.eat(tokTypes.braceR);
   return this.finishNode(node, "BlockStatement")
-}
+};
 
 lp$1.parseFor = function(node, init) {
-  node.init = init
-  node.test = node.update = null
-  if (this.eat(tokTypes.semi) && this.tok.type !== tokTypes.semi) node.test = this.parseExpression()
-  if (this.eat(tokTypes.semi) && this.tok.type !== tokTypes.parenR) node.update = this.parseExpression()
-  this.popCx()
-  this.expect(tokTypes.parenR)
-  node.body = this.parseStatement()
+  node.init = init;
+  node.test = node.update = null;
+  if (this.eat(tokTypes.semi) && this.tok.type !== tokTypes.semi) { node.test = this.parseExpression(); }
+  if (this.eat(tokTypes.semi) && this.tok.type !== tokTypes.parenR) { node.update = this.parseExpression(); }
+  this.popCx();
+  this.expect(tokTypes.parenR);
+  node.body = this.parseStatement();
   return this.finishNode(node, "ForStatement")
-}
+};
 
 lp$1.parseForIn = function(node, init) {
-  var type = this.tok.type === tokTypes._in ? "ForInStatement" : "ForOfStatement"
-  this.next()
-  node.left = init
-  node.right = this.parseExpression()
-  this.popCx()
-  this.expect(tokTypes.parenR)
-  node.body = this.parseStatement()
+  var type = this.tok.type === tokTypes._in ? "ForInStatement" : "ForOfStatement";
+  this.next();
+  node.left = init;
+  node.right = this.parseExpression();
+  this.popCx();
+  this.expect(tokTypes.parenR);
+  node.body = this.parseStatement();
   return this.finishNode(node, type)
-}
+};
 
 lp$1.parseVar = function(noIn, kind) {
   var this$1 = this;
 
-  var node = this.startNode()
-  node.kind = kind
-  this.next()
-  node.declarations = []
+  var node = this.startNode();
+  node.kind = kind;
+  this.next();
+  node.declarations = [];
   do {
-    var decl = this$1.startNode()
-    decl.id = this$1.options.ecmaVersion >= 6 ? this$1.toAssignable(this$1.parseExprAtom(), true) : this$1.parseIdent()
-    decl.init = this$1.eat(tokTypes.eq) ? this$1.parseMaybeAssign(noIn) : null
-    node.declarations.push(this$1.finishNode(decl, "VariableDeclarator"))
+    var decl = this$1.startNode();
+    decl.id = this$1.options.ecmaVersion >= 6 ? this$1.toAssignable(this$1.parseExprAtom(), true) : this$1.parseIdent();
+    decl.init = this$1.eat(tokTypes.eq) ? this$1.parseMaybeAssign(noIn) : null;
+    node.declarations.push(this$1.finishNode(decl, "VariableDeclarator"));
   } while (this.eat(tokTypes.comma))
   if (!node.declarations.length) {
-    var decl$1 = this.startNode()
-    decl$1.id = this.dummyIdent()
-    node.declarations.push(this.finishNode(decl$1, "VariableDeclarator"))
+    var decl$1 = this.startNode();
+    decl$1.id = this.dummyIdent();
+    node.declarations.push(this.finishNode(decl$1, "VariableDeclarator"));
   }
-  if (!noIn) this.semicolon()
+  if (!noIn) { this.semicolon(); }
   return this.finishNode(node, "VariableDeclaration")
-}
+};
 
 lp$1.parseClass = function(isStatement) {
   var this$1 = this;
 
-  var node = this.startNode()
-  this.next()
-  if (this.tok.type === tokTypes.name) node.id = this.parseIdent()
-  else if (isStatement === true) node.id = this.dummyIdent()
-  else node.id = null
-  node.superClass = this.eat(tokTypes._extends) ? this.parseExpression() : null
-  node.body = this.startNode()
-  node.body.body = []
-  this.pushCx()
-  var indent = this.curIndent + 1, line = this.curLineStart
-  this.eat(tokTypes.braceL)
-  if (this.curIndent + 1 < indent) { indent = this.curIndent; line = this.curLineStart }
+  var node = this.startNode();
+  this.next();
+  if (this.tok.type === tokTypes.name) { node.id = this.parseIdent(); }
+  else if (isStatement === true) { node.id = this.dummyIdent(); }
+  else { node.id = null; }
+  node.superClass = this.eat(tokTypes._extends) ? this.parseExpression() : null;
+  node.body = this.startNode();
+  node.body.body = [];
+  this.pushCx();
+  var indent = this.curIndent + 1, line = this.curLineStart;
+  this.eat(tokTypes.braceL);
+  if (this.curIndent + 1 < indent) { indent = this.curIndent; line = this.curLineStart; }
   while (!this.closes(tokTypes.braceR, indent, line)) {
-    if (this$1.semicolon()) continue
-    var method = this$1.startNode(), isGenerator, isAsync
+    if (this$1.semicolon()) { continue }
+    var method = this$1.startNode(), isGenerator = (void 0), isAsync = (void 0);
     if (this$1.options.ecmaVersion >= 6) {
-      method.static = false
-      isGenerator = this$1.eat(tokTypes.star)
+      method.static = false;
+      isGenerator = this$1.eat(tokTypes.star);
     }
-    this$1.parsePropertyName(method)
-    if (isDummy(method.key)) { if (isDummy(this$1.parseMaybeAssign())) this$1.next(); this$1.eat(tokTypes.comma); continue }
+    this$1.parsePropertyName(method);
+    if (isDummy(method.key)) { if (isDummy(this$1.parseMaybeAssign())) { this$1.next(); } this$1.eat(tokTypes.comma); continue }
     if (method.key.type === "Identifier" && !method.computed && method.key.name === "static" &&
         (this$1.tok.type != tokTypes.parenL && this$1.tok.type != tokTypes.braceL)) {
-      method.static = true
-      isGenerator = this$1.eat(tokTypes.star)
-      this$1.parsePropertyName(method)
+      method.static = true;
+      isGenerator = this$1.eat(tokTypes.star);
+      this$1.parsePropertyName(method);
     } else {
-      method.static = false
+      method.static = false;
     }
     if (!method.computed &&
         method.key.type === "Identifier" && method.key.name === "async" && this$1.tok.type !== tokTypes.parenL &&
         !this$1.canInsertSemicolon()) {
-      this$1.parsePropertyName(method)
-      isAsync = true
+      this$1.parsePropertyName(method);
+      isAsync = true;
     } else {
-      isAsync = false
+      isAsync = false;
     }
     if (this$1.options.ecmaVersion >= 5 && method.key.type === "Identifier" &&
         !method.computed && (method.key.name === "get" || method.key.name === "set") &&
         this$1.tok.type !== tokTypes.parenL && this$1.tok.type !== tokTypes.braceL) {
-      method.kind = method.key.name
-      this$1.parsePropertyName(method)
-      method.value = this$1.parseMethod(false)
+      method.kind = method.key.name;
+      this$1.parsePropertyName(method);
+      method.value = this$1.parseMethod(false);
     } else {
       if (!method.computed && !method.static && !isGenerator && !isAsync && (
         method.key.type === "Identifier" && method.key.name === "constructor" ||
           method.key.type === "Literal" && method.key.value === "constructor")) {
-        method.kind = "constructor"
+        method.kind = "constructor";
       } else {
-        method.kind = "method"
+        method.kind = "method";
       }
-      method.value = this$1.parseMethod(isGenerator, isAsync)
+      method.value = this$1.parseMethod(isGenerator, isAsync);
     }
-    node.body.body.push(this$1.finishNode(method, "MethodDefinition"))
+    node.body.body.push(this$1.finishNode(method, "MethodDefinition"));
   }
-  this.popCx()
+  this.popCx();
   if (!this.eat(tokTypes.braceR)) {
     // If there is no closing brace, make the node span to the start
     // of the next token (this is useful for Tern)
-    this.last.end = this.tok.start
-    if (this.options.locations) this.last.loc.end = this.tok.loc.start
+    this.last.end = this.tok.start;
+    if (this.options.locations) { this.last.loc.end = this.tok.loc.start; }
   }
-  this.semicolon()
-  this.finishNode(node.body, "ClassBody")
+  this.semicolon();
+  this.finishNode(node.body, "ClassBody");
   return this.finishNode(node, isStatement ? "ClassDeclaration" : "ClassExpression")
-}
+};
 
 lp$1.parseFunction = function(node, isStatement, isAsync) {
-  var oldInAsync = this.inAsync
-  this.initFunction(node)
+  var oldInAsync = this.inAsync;
+  this.initFunction(node);
   if (this.options.ecmaVersion >= 6) {
-    node.generator = this.eat(tokTypes.star)
+    node.generator = this.eat(tokTypes.star);
   }
   if (this.options.ecmaVersion >= 8) {
-    node.async = !!isAsync
+    node.async = !!isAsync;
   }
-  if (this.tok.type === tokTypes.name) node.id = this.parseIdent()
-  else if (isStatement === true) node.id = this.dummyIdent()
-  this.inAsync = node.async
-  node.params = this.parseFunctionParams()
-  node.body = this.parseBlock()
-  this.inAsync = oldInAsync
+  if (this.tok.type === tokTypes.name) { node.id = this.parseIdent(); }
+  else if (isStatement === true) { node.id = this.dummyIdent(); }
+  this.inAsync = node.async;
+  node.params = this.parseFunctionParams();
+  node.body = this.parseBlock();
+  this.inAsync = oldInAsync;
   return this.finishNode(node, isStatement ? "FunctionDeclaration" : "FunctionExpression")
-}
+};
 
 lp$1.parseExport = function() {
-  var node = this.startNode()
-  this.next()
+  var node = this.startNode();
+  this.next();
   if (this.eat(tokTypes.star)) {
-    node.source = this.eatContextual("from") ? this.parseExprAtom() : this.dummyString()
+    node.source = this.eatContextual("from") ? this.parseExprAtom() : this.dummyString();
     return this.finishNode(node, "ExportAllDeclaration")
   }
   if (this.eat(tokTypes._default)) {
     // export default (function foo() {}) // This is FunctionExpression.
-    var isAsync
+    var isAsync;
     if (this.tok.type === tokTypes._function || (isAsync = this.toks.isAsyncFunction())) {
-      var fNode = this.startNode()
-      this.next()
-      if (isAsync) this.next()
-      node.declaration = this.parseFunction(fNode, "nullableID", isAsync)
+      var fNode = this.startNode();
+      this.next();
+      if (isAsync) { this.next(); }
+      node.declaration = this.parseFunction(fNode, "nullableID", isAsync);
     } else if (this.tok.type === tokTypes._class) {
-      node.declaration = this.parseClass("nullableID")
+      node.declaration = this.parseClass("nullableID");
     } else {
-      node.declaration = this.parseMaybeAssign()
-      this.semicolon()
+      node.declaration = this.parseMaybeAssign();
+      this.semicolon();
     }
     return this.finishNode(node, "ExportDefaultDeclaration")
   }
   if (this.tok.type.keyword || this.toks.isLet() || this.toks.isAsyncFunction()) {
-    node.declaration = this.parseStatement()
-    node.specifiers = []
-    node.source = null
+    node.declaration = this.parseStatement();
+    node.specifiers = [];
+    node.source = null;
   } else {
-    node.declaration = null
-    node.specifiers = this.parseExportSpecifierList()
-    node.source = this.eatContextual("from") ? this.parseExprAtom() : null
-    this.semicolon()
+    node.declaration = null;
+    node.specifiers = this.parseExportSpecifierList();
+    node.source = this.eatContextual("from") ? this.parseExprAtom() : null;
+    this.semicolon();
   }
   return this.finishNode(node, "ExportNamedDeclaration")
-}
+};
 
 lp$1.parseImport = function() {
-  var node = this.startNode()
-  this.next()
+  var node = this.startNode();
+  this.next();
   if (this.tok.type === tokTypes.string) {
-    node.specifiers = []
-    node.source = this.parseExprAtom()
-    node.kind = ""
+    node.specifiers = [];
+    node.source = this.parseExprAtom();
+    node.kind = "";
   } else {
-    var elt
+    var elt;
     if (this.tok.type === tokTypes.name && this.tok.value !== "from") {
-      elt = this.startNode()
-      elt.local = this.parseIdent()
-      this.finishNode(elt, "ImportDefaultSpecifier")
-      this.eat(tokTypes.comma)
+      elt = this.startNode();
+      elt.local = this.parseIdent();
+      this.finishNode(elt, "ImportDefaultSpecifier");
+      this.eat(tokTypes.comma);
     }
-    node.specifiers = this.parseImportSpecifierList()
-    node.source = this.eatContextual("from") && this.tok.type == tokTypes.string ? this.parseExprAtom() : this.dummyString()
-    if (elt) node.specifiers.unshift(elt)
+    node.specifiers = this.parseImportSpecifierList();
+    node.source = this.eatContextual("from") && this.tok.type == tokTypes.string ? this.parseExprAtom() : this.dummyString();
+    if (elt) { node.specifiers.unshift(elt); }
   }
-  this.semicolon()
+  this.semicolon();
   return this.finishNode(node, "ImportDeclaration")
-}
+};
 
 lp$1.parseImportSpecifierList = function() {
   var this$1 = this;
 
-  var elts = []
+  var elts = [];
   if (this.tok.type === tokTypes.star) {
-    var elt = this.startNode()
-    this.next()
-    elt.local = this.eatContextual("as") ? this.parseIdent() : this.dummyIdent()
-    elts.push(this.finishNode(elt, "ImportNamespaceSpecifier"))
+    var elt = this.startNode();
+    this.next();
+    elt.local = this.eatContextual("as") ? this.parseIdent() : this.dummyIdent();
+    elts.push(this.finishNode(elt, "ImportNamespaceSpecifier"));
   } else {
-    var indent = this.curIndent, line = this.curLineStart, continuedLine = this.nextLineStart
-    this.pushCx()
-    this.eat(tokTypes.braceL)
-    if (this.curLineStart > continuedLine) continuedLine = this.curLineStart
+    var indent = this.curIndent, line = this.curLineStart, continuedLine = this.nextLineStart;
+    this.pushCx();
+    this.eat(tokTypes.braceL);
+    if (this.curLineStart > continuedLine) { continuedLine = this.curLineStart; }
     while (!this.closes(tokTypes.braceR, indent + (this.curLineStart <= continuedLine ? 1 : 0), line)) {
-      var elt$1 = this$1.startNode()
+      var elt$1 = this$1.startNode();
       if (this$1.eat(tokTypes.star)) {
-        elt$1.local = this$1.eatContextual("as") ? this$1.parseIdent() : this$1.dummyIdent()
-        this$1.finishNode(elt$1, "ImportNamespaceSpecifier")
+        elt$1.local = this$1.eatContextual("as") ? this$1.parseIdent() : this$1.dummyIdent();
+        this$1.finishNode(elt$1, "ImportNamespaceSpecifier");
       } else {
-        if (this$1.isContextual("from")) break
-        elt$1.imported = this$1.parseIdent()
-        if (isDummy(elt$1.imported)) break
-        elt$1.local = this$1.eatContextual("as") ? this$1.parseIdent() : elt$1.imported
-        this$1.finishNode(elt$1, "ImportSpecifier")
+        if (this$1.isContextual("from")) { break }
+        elt$1.imported = this$1.parseIdent();
+        if (isDummy(elt$1.imported)) { break }
+        elt$1.local = this$1.eatContextual("as") ? this$1.parseIdent() : elt$1.imported;
+        this$1.finishNode(elt$1, "ImportSpecifier");
       }
-      elts.push(elt$1)
-      this$1.eat(tokTypes.comma)
+      elts.push(elt$1);
+      this$1.eat(tokTypes.comma);
     }
-    this.eat(tokTypes.braceR)
-    this.popCx()
+    this.eat(tokTypes.braceR);
+    this.popCx();
   }
   return elts
-}
+};
 
 lp$1.parseExportSpecifierList = function() {
   var this$1 = this;
 
-  var elts = []
-  var indent = this.curIndent, line = this.curLineStart, continuedLine = this.nextLineStart
-  this.pushCx()
-  this.eat(tokTypes.braceL)
-  if (this.curLineStart > continuedLine) continuedLine = this.curLineStart
+  var elts = [];
+  var indent = this.curIndent, line = this.curLineStart, continuedLine = this.nextLineStart;
+  this.pushCx();
+  this.eat(tokTypes.braceL);
+  if (this.curLineStart > continuedLine) { continuedLine = this.curLineStart; }
   while (!this.closes(tokTypes.braceR, indent + (this.curLineStart <= continuedLine ? 1 : 0), line)) {
-    if (this$1.isContextual("from")) break
-    var elt = this$1.startNode()
-    elt.local = this$1.parseIdent()
-    if (isDummy(elt.local)) break
-    elt.exported = this$1.eatContextual("as") ? this$1.parseIdent() : elt.local
-    this$1.finishNode(elt, "ExportSpecifier")
-    elts.push(elt)
-    this$1.eat(tokTypes.comma)
+    if (this$1.isContextual("from")) { break }
+    var elt = this$1.startNode();
+    elt.local = this$1.parseIdent();
+    if (isDummy(elt.local)) { break }
+    elt.exported = this$1.eatContextual("as") ? this$1.parseIdent() : elt.local;
+    this$1.finishNode(elt, "ExportSpecifier");
+    elts.push(elt);
+    this$1.eat(tokTypes.comma);
   }
-  this.eat(tokTypes.braceR)
-  this.popCx()
+  this.eat(tokTypes.braceR);
+  this.popCx();
   return elts
-}
+};
 
-var lp$2 = LooseParser.prototype
+var lp$2 = LooseParser.prototype;
 
 lp$2.checkLVal = function(expr) {
-  if (!expr) return expr
+  if (!expr) { return expr }
   switch (expr.type) {
   case "Identifier":
   case "MemberExpression":
     return expr
 
   case "ParenthesizedExpression":
-    expr.expression = this.checkLVal(expr.expression)
+    expr.expression = this.checkLVal(expr.expression);
     return expr
 
   default:
     return this.dummyIdent()
   }
-}
+};
 
 lp$2.parseExpression = function(noIn) {
   var this$1 = this;
 
-  var start = this.storeCurrentPos()
-  var expr = this.parseMaybeAssign(noIn)
+  var start = this.storeCurrentPos();
+  var expr = this.parseMaybeAssign(noIn);
   if (this.tok.type === tokTypes.comma) {
-    var node = this.startNodeAt(start)
-    node.expressions = [expr]
-    while (this.eat(tokTypes.comma)) node.expressions.push(this$1.parseMaybeAssign(noIn))
+    var node = this.startNodeAt(start);
+    node.expressions = [expr];
+    while (this.eat(tokTypes.comma)) { node.expressions.push(this$1.parseMaybeAssign(noIn)); }
     return this.finishNode(node, "SequenceExpression")
   }
   return expr
-}
+};
 
 lp$2.parseParenExpression = function() {
-  this.pushCx()
-  this.expect(tokTypes.parenL)
-  var val = this.parseExpression()
-  this.popCx()
-  this.expect(tokTypes.parenR)
+  this.pushCx();
+  this.expect(tokTypes.parenL);
+  var val = this.parseExpression();
+  this.popCx();
+  this.expect(tokTypes.parenR);
   return val
-}
+};
 
 lp$2.parseMaybeAssign = function(noIn) {
   if (this.toks.isContextual("yield")) {
-    var node = this.startNode()
-    this.next()
+    var node = this.startNode();
+    this.next();
     if (this.semicolon() || this.canInsertSemicolon() || (this.tok.type != tokTypes.star && !this.tok.type.startsExpr)) {
-      node.delegate = false
-      node.argument = null
+      node.delegate = false;
+      node.argument = null;
     } else {
-      node.delegate = this.eat(tokTypes.star)
-      node.argument = this.parseMaybeAssign()
+      node.delegate = this.eat(tokTypes.star);
+      node.argument = this.parseMaybeAssign();
     }
     return this.finishNode(node, "YieldExpression")
   }
 
-  var start = this.storeCurrentPos()
-  var left = this.parseMaybeConditional(noIn)
+  var start = this.storeCurrentPos();
+  var left = this.parseMaybeConditional(noIn);
   if (this.tok.type.isAssign) {
-    var node$1 = this.startNodeAt(start)
-    node$1.operator = this.tok.value
-    node$1.left = this.tok.type === tokTypes.eq ? this.toAssignable(left) : this.checkLVal(left)
-    this.next()
-    node$1.right = this.parseMaybeAssign(noIn)
+    var node$1 = this.startNodeAt(start);
+    node$1.operator = this.tok.value;
+    node$1.left = this.tok.type === tokTypes.eq ? this.toAssignable(left) : this.checkLVal(left);
+    this.next();
+    node$1.right = this.parseMaybeAssign(noIn);
     return this.finishNode(node$1, "AssignmentExpression")
   }
   return left
-}
+};
 
 lp$2.parseMaybeConditional = function(noIn) {
-  var start = this.storeCurrentPos()
-  var expr = this.parseExprOps(noIn)
+  var start = this.storeCurrentPos();
+  var expr = this.parseExprOps(noIn);
   if (this.eat(tokTypes.question)) {
-    var node = this.startNodeAt(start)
-    node.test = expr
-    node.consequent = this.parseMaybeAssign()
-    node.alternate = this.expect(tokTypes.colon) ? this.parseMaybeAssign(noIn) : this.dummyIdent()
+    var node = this.startNodeAt(start);
+    node.test = expr;
+    node.consequent = this.parseMaybeAssign();
+    node.alternate = this.expect(tokTypes.colon) ? this.parseMaybeAssign(noIn) : this.dummyIdent();
     return this.finishNode(node, "ConditionalExpression")
   }
   return expr
-}
+};
 
 lp$2.parseExprOps = function(noIn) {
-  var start = this.storeCurrentPos()
-  var indent = this.curIndent, line = this.curLineStart
+  var start = this.storeCurrentPos();
+  var indent = this.curIndent, line = this.curLineStart;
   return this.parseExprOp(this.parseMaybeUnary(false), start, -1, noIn, indent, line)
-}
+};
 
 lp$2.parseExprOp = function(left, start, minPrec, noIn, indent, line) {
-  if (this.curLineStart != line && this.curIndent < indent && this.tokenStartsLine()) return left
-  var prec = this.tok.type.binop
+  if (this.curLineStart != line && this.curIndent < indent && this.tokenStartsLine()) { return left }
+  var prec = this.tok.type.binop;
   if (prec != null && (!noIn || this.tok.type !== tokTypes._in)) {
     if (prec > minPrec) {
-      var node = this.startNodeAt(start)
-      node.left = left
-      node.operator = this.tok.value
-      this.next()
+      var node = this.startNodeAt(start);
+      node.left = left;
+      node.operator = this.tok.value;
+      this.next();
       if (this.curLineStart != line && this.curIndent < indent && this.tokenStartsLine()) {
-        node.right = this.dummyIdent()
+        node.right = this.dummyIdent();
       } else {
-        var rightStart = this.storeCurrentPos()
-        node.right = this.parseExprOp(this.parseMaybeUnary(false), rightStart, prec, noIn, indent, line)
+        var rightStart = this.storeCurrentPos();
+        node.right = this.parseExprOp(this.parseMaybeUnary(false), rightStart, prec, noIn, indent, line);
       }
-      this.finishNode(node, /&&|\|\|/.test(node.operator) ? "LogicalExpression" : "BinaryExpression")
+      this.finishNode(node, /&&|\|\|/.test(node.operator) ? "LogicalExpression" : "BinaryExpression");
       return this.parseExprOp(node, start, minPrec, noIn, indent, line)
     }
   }
   return left
-}
+};
 
 lp$2.parseMaybeUnary = function(sawUnary) {
   var this$1 = this;
 
-  var start = this.storeCurrentPos(), expr
+  var start = this.storeCurrentPos(), expr;
   if (this.options.ecmaVersion >= 8 && this.inAsync && this.toks.isContextual("await")) {
-    expr = this.parseAwait()
-    sawUnary = true
+    expr = this.parseAwait();
+    sawUnary = true;
   } else if (this.tok.type.prefix) {
-    var node = this.startNode(), update = this.tok.type === tokTypes.incDec
-    if (!update) sawUnary = true
-    node.operator = this.tok.value
-    node.prefix = true
-    this.next()
-    node.argument = this.parseMaybeUnary(true)
-    if (update) node.argument = this.checkLVal(node.argument)
-    expr = this.finishNode(node, update ? "UpdateExpression" : "UnaryExpression")
+    var node = this.startNode(), update = this.tok.type === tokTypes.incDec;
+    if (!update) { sawUnary = true; }
+    node.operator = this.tok.value;
+    node.prefix = true;
+    this.next();
+    node.argument = this.parseMaybeUnary(true);
+    if (update) { node.argument = this.checkLVal(node.argument); }
+    expr = this.finishNode(node, update ? "UpdateExpression" : "UnaryExpression");
   } else if (this.tok.type === tokTypes.ellipsis) {
-    var node$1 = this.startNode()
-    this.next()
-    node$1.argument = this.parseMaybeUnary(sawUnary)
-    expr = this.finishNode(node$1, "SpreadElement")
+    var node$1 = this.startNode();
+    this.next();
+    node$1.argument = this.parseMaybeUnary(sawUnary);
+    expr = this.finishNode(node$1, "SpreadElement");
   } else {
-    expr = this.parseExprSubscripts()
+    expr = this.parseExprSubscripts();
     while (this.tok.type.postfix && !this.canInsertSemicolon()) {
-      var node$2 = this$1.startNodeAt(start)
-      node$2.operator = this$1.tok.value
-      node$2.prefix = false
-      node$2.argument = this$1.checkLVal(expr)
-      this$1.next()
-      expr = this$1.finishNode(node$2, "UpdateExpression")
+      var node$2 = this$1.startNodeAt(start);
+      node$2.operator = this$1.tok.value;
+      node$2.prefix = false;
+      node$2.argument = this$1.checkLVal(expr);
+      this$1.next();
+      expr = this$1.finishNode(node$2, "UpdateExpression");
     }
   }
 
   if (!sawUnary && this.eat(tokTypes.starstar)) {
-    var node$3 = this.startNodeAt(start)
-    node$3.operator = "**"
-    node$3.left = expr
-    node$3.right = this.parseMaybeUnary(false)
+    var node$3 = this.startNodeAt(start);
+    node$3.operator = "**";
+    node$3.left = expr;
+    node$3.right = this.parseMaybeUnary(false);
     return this.finishNode(node$3, "BinaryExpression")
   }
 
   return expr
-}
+};
 
 lp$2.parseExprSubscripts = function() {
-  var start = this.storeCurrentPos()
+  var start = this.storeCurrentPos();
   return this.parseSubscripts(this.parseExprAtom(), start, false, this.curIndent, this.curLineStart)
-}
+};
 
 lp$2.parseSubscripts = function(base, start, noCalls, startIndent, line) {
   var this$1 = this;
@@ -910,120 +915,120 @@ lp$2.parseSubscripts = function(base, start, noCalls, startIndent, line) {
   for (;;) {
     if (this$1.curLineStart != line && this$1.curIndent <= startIndent && this$1.tokenStartsLine()) {
       if (this$1.tok.type == tokTypes.dot && this$1.curIndent == startIndent)
-        --startIndent
+        { --startIndent; }
       else
-        return base
+        { return base }
     }
 
-    var maybeAsyncArrow = base.type === "Identifier" && base.name === "async" && !this$1.canInsertSemicolon()
+    var maybeAsyncArrow = base.type === "Identifier" && base.name === "async" && !this$1.canInsertSemicolon();
 
     if (this$1.eat(tokTypes.dot)) {
-      var node = this$1.startNodeAt(start)
-      node.object = base
+      var node = this$1.startNodeAt(start);
+      node.object = base;
       if (this$1.curLineStart != line && this$1.curIndent <= startIndent && this$1.tokenStartsLine())
-        node.property = this$1.dummyIdent()
+        { node.property = this$1.dummyIdent(); }
       else
-        node.property = this$1.parsePropertyAccessor() || this$1.dummyIdent()
-      node.computed = false
-      base = this$1.finishNode(node, "MemberExpression")
+        { node.property = this$1.parsePropertyAccessor() || this$1.dummyIdent(); }
+      node.computed = false;
+      base = this$1.finishNode(node, "MemberExpression");
     } else if (this$1.tok.type == tokTypes.bracketL) {
-      this$1.pushCx()
-      this$1.next()
-      var node$1 = this$1.startNodeAt(start)
-      node$1.object = base
-      node$1.property = this$1.parseExpression()
-      node$1.computed = true
-      this$1.popCx()
-      this$1.expect(tokTypes.bracketR)
-      base = this$1.finishNode(node$1, "MemberExpression")
+      this$1.pushCx();
+      this$1.next();
+      var node$1 = this$1.startNodeAt(start);
+      node$1.object = base;
+      node$1.property = this$1.parseExpression();
+      node$1.computed = true;
+      this$1.popCx();
+      this$1.expect(tokTypes.bracketR);
+      base = this$1.finishNode(node$1, "MemberExpression");
     } else if (!noCalls && this$1.tok.type == tokTypes.parenL) {
-      var exprList = this$1.parseExprList(tokTypes.parenR)
+      var exprList = this$1.parseExprList(tokTypes.parenR);
       if (maybeAsyncArrow && this$1.eat(tokTypes.arrow))
-        return this$1.parseArrowExpression(this$1.startNodeAt(start), exprList, true)
-      var node$2 = this$1.startNodeAt(start)
-      node$2.callee = base
-      node$2.arguments = exprList
-      base = this$1.finishNode(node$2, "CallExpression")
+        { return this$1.parseArrowExpression(this$1.startNodeAt(start), exprList, true) }
+      var node$2 = this$1.startNodeAt(start);
+      node$2.callee = base;
+      node$2.arguments = exprList;
+      base = this$1.finishNode(node$2, "CallExpression");
     } else if (this$1.tok.type == tokTypes.backQuote) {
-      var node$3 = this$1.startNodeAt(start)
-      node$3.tag = base
-      node$3.quasi = this$1.parseTemplate()
-      base = this$1.finishNode(node$3, "TaggedTemplateExpression")
+      var node$3 = this$1.startNodeAt(start);
+      node$3.tag = base;
+      node$3.quasi = this$1.parseTemplate();
+      base = this$1.finishNode(node$3, "TaggedTemplateExpression");
     } else {
       return base
     }
   }
-}
+};
 
 lp$2.parseExprAtom = function() {
-  var node
+  var node;
   switch (this.tok.type) {
   case tokTypes._this:
   case tokTypes._super:
-    var type = this.tok.type === tokTypes._this ? "ThisExpression" : "Super"
-    node = this.startNode()
-    this.next()
+    var type = this.tok.type === tokTypes._this ? "ThisExpression" : "Super";
+    node = this.startNode();
+    this.next();
     return this.finishNode(node, type)
 
   case tokTypes.name:
-    var start = this.storeCurrentPos()
-    var id = this.parseIdent()
-    var isAsync = false
+    var start = this.storeCurrentPos();
+    var id = this.parseIdent();
+    var isAsync = false;
     if (id.name === "async" && !this.canInsertSemicolon()) {
       if (this.eat(tokTypes._function))
-        return this.parseFunction(this.startNodeAt(start), false, true)
+        { return this.parseFunction(this.startNodeAt(start), false, true) }
       if (this.tok.type === tokTypes.name) {
-        id = this.parseIdent()
-        isAsync = true
+        id = this.parseIdent();
+        isAsync = true;
       }
     }
     return this.eat(tokTypes.arrow) ? this.parseArrowExpression(this.startNodeAt(start), [id], isAsync) : id
 
   case tokTypes.regexp:
-    node = this.startNode()
-    var val = this.tok.value
-    node.regex = {pattern: val.pattern, flags: val.flags}
-    node.value = val.value
-    node.raw = this.input.slice(this.tok.start, this.tok.end)
-    this.next()
+    node = this.startNode();
+    var val = this.tok.value;
+    node.regex = {pattern: val.pattern, flags: val.flags};
+    node.value = val.value;
+    node.raw = this.input.slice(this.tok.start, this.tok.end);
+    this.next();
     return this.finishNode(node, "Literal")
 
   case tokTypes.num: case tokTypes.string:
-    node = this.startNode()
-    node.value = this.tok.value
-    node.raw = this.input.slice(this.tok.start, this.tok.end)
-    this.next()
+    node = this.startNode();
+    node.value = this.tok.value;
+    node.raw = this.input.slice(this.tok.start, this.tok.end);
+    this.next();
     return this.finishNode(node, "Literal")
 
   case tokTypes._null: case tokTypes._true: case tokTypes._false:
-    node = this.startNode()
-    node.value = this.tok.type === tokTypes._null ? null : this.tok.type === tokTypes._true
-    node.raw = this.tok.type.keyword
-    this.next()
+    node = this.startNode();
+    node.value = this.tok.type === tokTypes._null ? null : this.tok.type === tokTypes._true;
+    node.raw = this.tok.type.keyword;
+    this.next();
     return this.finishNode(node, "Literal")
 
   case tokTypes.parenL:
-    var parenStart = this.storeCurrentPos()
-    this.next()
-    var inner = this.parseExpression()
-    this.expect(tokTypes.parenR)
+    var parenStart = this.storeCurrentPos();
+    this.next();
+    var inner = this.parseExpression();
+    this.expect(tokTypes.parenR);
     if (this.eat(tokTypes.arrow)) {
       // (a,)=>a // SequenceExpression makes dummy in the last hole. Drop the dummy.
-      var params = inner.expressions || [inner]
+      var params = inner.expressions || [inner];
       if (params.length && isDummy(params[params.length - 1]))
-        params.pop()
+        { params.pop(); }
       return this.parseArrowExpression(this.startNodeAt(parenStart), params)
     }
     if (this.options.preserveParens) {
-      var par = this.startNodeAt(parenStart)
-      par.expression = inner
-      inner = this.finishNode(par, "ParenthesizedExpression")
+      var par = this.startNodeAt(parenStart);
+      par.expression = inner;
+      inner = this.finishNode(par, "ParenthesizedExpression");
     }
     return inner
 
   case tokTypes.bracketL:
-    node = this.startNode()
-    node.elements = this.parseExprList(tokTypes.bracketR, true)
+    node = this.startNode();
+    node.elements = this.parseExprList(tokTypes.bracketR, true);
     return this.finishNode(node, "ArrayExpression")
 
   case tokTypes.braceL:
@@ -1033,8 +1038,8 @@ lp$2.parseExprAtom = function() {
     return this.parseClass(false)
 
   case tokTypes._function:
-    node = this.startNode()
-    this.next()
+    node = this.startNode();
+    this.next();
     return this.parseFunction(node, false)
 
   case tokTypes._new:
@@ -1046,170 +1051,177 @@ lp$2.parseExprAtom = function() {
   default:
     return this.dummyIdent()
   }
-}
+};
 
 lp$2.parseNew = function() {
-  var node = this.startNode(), startIndent = this.curIndent, line = this.curLineStart
-  var meta = this.parseIdent(true)
+  var node = this.startNode(), startIndent = this.curIndent, line = this.curLineStart;
+  var meta = this.parseIdent(true);
   if (this.options.ecmaVersion >= 6 && this.eat(tokTypes.dot)) {
-    node.meta = meta
-    node.property = this.parseIdent(true)
+    node.meta = meta;
+    node.property = this.parseIdent(true);
     return this.finishNode(node, "MetaProperty")
   }
-  var start = this.storeCurrentPos()
-  node.callee = this.parseSubscripts(this.parseExprAtom(), start, true, startIndent, line)
+  var start = this.storeCurrentPos();
+  node.callee = this.parseSubscripts(this.parseExprAtom(), start, true, startIndent, line);
   if (this.tok.type == tokTypes.parenL) {
-    node.arguments = this.parseExprList(tokTypes.parenR)
+    node.arguments = this.parseExprList(tokTypes.parenR);
   } else {
-    node.arguments = []
+    node.arguments = [];
   }
   return this.finishNode(node, "NewExpression")
-}
+};
 
 lp$2.parseTemplateElement = function() {
-  var elem = this.startNode()
-  elem.value = {
-    raw: this.input.slice(this.tok.start, this.tok.end).replace(/\r\n?/g, "\n"),
-    cooked: this.tok.value
+  var elem = this.startNode();
+
+  // The loose parser accepts invalid unicode escapes even in untagged templates.
+  if (this.tok.type === tokTypes.invalidTemplate) {
+    elem.value = {
+      raw: this.tok.value,
+      cooked: null
+    };
+  } else {
+    elem.value = {
+      raw: this.input.slice(this.tok.start, this.tok.end).replace(/\r\n?/g, "\n"),
+      cooked: this.tok.value
+    };
   }
-  this.next()
-  elem.tail = this.tok.type === tokTypes.backQuote
+  this.next();
+  elem.tail = this.tok.type === tokTypes.backQuote;
   return this.finishNode(elem, "TemplateElement")
-}
+};
 
 lp$2.parseTemplate = function() {
   var this$1 = this;
 
-  var node = this.startNode()
-  this.next()
-  node.expressions = []
-  var curElt = this.parseTemplateElement()
-  node.quasis = [curElt]
+  var node = this.startNode();
+  this.next();
+  node.expressions = [];
+  var curElt = this.parseTemplateElement();
+  node.quasis = [curElt];
   while (!curElt.tail) {
-    this$1.next()
-    node.expressions.push(this$1.parseExpression())
+    this$1.next();
+    node.expressions.push(this$1.parseExpression());
     if (this$1.expect(tokTypes.braceR)) {
-      curElt = this$1.parseTemplateElement()
+      curElt = this$1.parseTemplateElement();
     } else {
-      curElt = this$1.startNode()
-      curElt.value = {cooked: "", raw: ""}
-      curElt.tail = true
-      this$1.finishNode(curElt, "TemplateElement")
+      curElt = this$1.startNode();
+      curElt.value = {cooked: "", raw: ""};
+      curElt.tail = true;
+      this$1.finishNode(curElt, "TemplateElement");
     }
-    node.quasis.push(curElt)
+    node.quasis.push(curElt);
   }
-  this.expect(tokTypes.backQuote)
+  this.expect(tokTypes.backQuote);
   return this.finishNode(node, "TemplateLiteral")
-}
+};
 
 lp$2.parseObj = function() {
   var this$1 = this;
 
-  var node = this.startNode()
-  node.properties = []
-  this.pushCx()
-  var indent = this.curIndent + 1, line = this.curLineStart
-  this.eat(tokTypes.braceL)
-  if (this.curIndent + 1 < indent) { indent = this.curIndent; line = this.curLineStart }
+  var node = this.startNode();
+  node.properties = [];
+  this.pushCx();
+  var indent = this.curIndent + 1, line = this.curLineStart;
+  this.eat(tokTypes.braceL);
+  if (this.curIndent + 1 < indent) { indent = this.curIndent; line = this.curLineStart; }
   while (!this.closes(tokTypes.braceR, indent, line)) {
-    var prop = this$1.startNode(), isGenerator, isAsync, start
+    var prop = this$1.startNode(), isGenerator = (void 0), isAsync = (void 0), start = (void 0);
     if (this$1.options.ecmaVersion >= 6) {
-      start = this$1.storeCurrentPos()
-      prop.method = false
-      prop.shorthand = false
-      isGenerator = this$1.eat(tokTypes.star)
+      start = this$1.storeCurrentPos();
+      prop.method = false;
+      prop.shorthand = false;
+      isGenerator = this$1.eat(tokTypes.star);
     }
-    this$1.parsePropertyName(prop)
-    if (!prop.computed &&
-        prop.key.type === "Identifier" && prop.key.name === "async" && this$1.tok.type !== tokTypes.parenL &&
-        this$1.tok.type !== tokTypes.colon && !this$1.canInsertSemicolon()) {
-      this$1.parsePropertyName(prop)
-      isAsync = true
+    this$1.parsePropertyName(prop);
+    if (this$1.toks.isAsyncProp(prop)) {
+      this$1.parsePropertyName(prop);
+      isAsync = true;
     } else {
-      isAsync = false
+      isAsync = false;
     }
-    if (isDummy(prop.key)) { if (isDummy(this$1.parseMaybeAssign())) this$1.next(); this$1.eat(tokTypes.comma); continue }
+    if (isDummy(prop.key)) { if (isDummy(this$1.parseMaybeAssign())) { this$1.next(); } this$1.eat(tokTypes.comma); continue }
     if (this$1.eat(tokTypes.colon)) {
-      prop.kind = "init"
-      prop.value = this$1.parseMaybeAssign()
+      prop.kind = "init";
+      prop.value = this$1.parseMaybeAssign();
     } else if (this$1.options.ecmaVersion >= 6 && (this$1.tok.type === tokTypes.parenL || this$1.tok.type === tokTypes.braceL)) {
-      prop.kind = "init"
-      prop.method = true
-      prop.value = this$1.parseMethod(isGenerator, isAsync)
+      prop.kind = "init";
+      prop.method = true;
+      prop.value = this$1.parseMethod(isGenerator, isAsync);
     } else if (this$1.options.ecmaVersion >= 5 && prop.key.type === "Identifier" &&
                !prop.computed && (prop.key.name === "get" || prop.key.name === "set") &&
                (this$1.tok.type != tokTypes.comma && this$1.tok.type != tokTypes.braceR)) {
-      prop.kind = prop.key.name
-      this$1.parsePropertyName(prop)
-      prop.value = this$1.parseMethod(false)
+      prop.kind = prop.key.name;
+      this$1.parsePropertyName(prop);
+      prop.value = this$1.parseMethod(false);
     } else {
-      prop.kind = "init"
+      prop.kind = "init";
       if (this$1.options.ecmaVersion >= 6) {
         if (this$1.eat(tokTypes.eq)) {
-          var assign = this$1.startNodeAt(start)
-          assign.operator = "="
-          assign.left = prop.key
-          assign.right = this$1.parseMaybeAssign()
-          prop.value = this$1.finishNode(assign, "AssignmentExpression")
+          var assign = this$1.startNodeAt(start);
+          assign.operator = "=";
+          assign.left = prop.key;
+          assign.right = this$1.parseMaybeAssign();
+          prop.value = this$1.finishNode(assign, "AssignmentExpression");
         } else {
-          prop.value = prop.key
+          prop.value = prop.key;
         }
       } else {
-        prop.value = this$1.dummyIdent()
+        prop.value = this$1.dummyIdent();
       }
-      prop.shorthand = true
+      prop.shorthand = true;
     }
-    node.properties.push(this$1.finishNode(prop, "Property"))
-    this$1.eat(tokTypes.comma)
+    node.properties.push(this$1.finishNode(prop, "Property"));
+    this$1.eat(tokTypes.comma);
   }
-  this.popCx()
+  this.popCx();
   if (!this.eat(tokTypes.braceR)) {
     // If there is no closing brace, make the node span to the start
     // of the next token (this is useful for Tern)
-    this.last.end = this.tok.start
-    if (this.options.locations) this.last.loc.end = this.tok.loc.start
+    this.last.end = this.tok.start;
+    if (this.options.locations) { this.last.loc.end = this.tok.loc.start; }
   }
   return this.finishNode(node, "ObjectExpression")
-}
+};
 
 lp$2.parsePropertyName = function(prop) {
   if (this.options.ecmaVersion >= 6) {
     if (this.eat(tokTypes.bracketL)) {
-      prop.computed = true
-      prop.key = this.parseExpression()
-      this.expect(tokTypes.bracketR)
+      prop.computed = true;
+      prop.key = this.parseExpression();
+      this.expect(tokTypes.bracketR);
       return
     } else {
-      prop.computed = false
+      prop.computed = false;
     }
   }
-  var key = (this.tok.type === tokTypes.num || this.tok.type === tokTypes.string) ? this.parseExprAtom() : this.parseIdent()
-  prop.key = key || this.dummyIdent()
-}
+  var key = (this.tok.type === tokTypes.num || this.tok.type === tokTypes.string) ? this.parseExprAtom() : this.parseIdent();
+  prop.key = key || this.dummyIdent();
+};
 
 lp$2.parsePropertyAccessor = function() {
-  if (this.tok.type === tokTypes.name || this.tok.type.keyword) return this.parseIdent()
-}
+  if (this.tok.type === tokTypes.name || this.tok.type.keyword) { return this.parseIdent() }
+};
 
 lp$2.parseIdent = function() {
-  var name = this.tok.type === tokTypes.name ? this.tok.value : this.tok.type.keyword
-  if (!name) return this.dummyIdent()
-  var node = this.startNode()
-  this.next()
-  node.name = name
+  var name = this.tok.type === tokTypes.name ? this.tok.value : this.tok.type.keyword;
+  if (!name) { return this.dummyIdent() }
+  var node = this.startNode();
+  this.next();
+  node.name = name;
   return this.finishNode(node, "Identifier")
-}
+};
 
 lp$2.initFunction = function(node) {
-  node.id = null
-  node.params = []
+  node.id = null;
+  node.params = [];
   if (this.options.ecmaVersion >= 6) {
-    node.generator = false
-    node.expression = false
+    node.generator = false;
+    node.expression = false;
   }
   if (this.options.ecmaVersion >= 8)
-    node.async = false
-}
+    { node.async = false; }
+};
 
 // Convert existing expression atom to assignable pattern
 // if possible.
@@ -1220,106 +1232,114 @@ lp$2.toAssignable = function(node, binding) {
   if (!node || node.type == "Identifier" || (node.type == "MemberExpression" && !binding)) {
     // Okay
   } else if (node.type == "ParenthesizedExpression") {
-    node.expression = this.toAssignable(node.expression, binding)
+    this.toAssignable(node.expression, binding);
   } else if (this.options.ecmaVersion < 6) {
     return this.dummyIdent()
   } else if (node.type == "ObjectExpression") {
-    node.type = "ObjectPattern"
-    var props = node.properties
-    for (var i = 0; i < props.length; i++)
-      props[i].value = this$1.toAssignable(props[i].value, binding)
+    node.type = "ObjectPattern";
+    var props = node.properties;
+    for (var i = 0, list = props; i < list.length; i += 1)
+      {
+      var prop = list[i];
+
+      this$1.toAssignable(prop.value, binding);
+    }
   } else if (node.type == "ArrayExpression") {
-    node.type = "ArrayPattern"
-    this.toAssignableList(node.elements, binding)
+    node.type = "ArrayPattern";
+    this.toAssignableList(node.elements, binding);
   } else if (node.type == "SpreadElement") {
-    node.type = "RestElement"
-    node.argument = this.toAssignable(node.argument, binding)
+    node.type = "RestElement";
+    this.toAssignable(node.argument, binding);
   } else if (node.type == "AssignmentExpression") {
-    node.type = "AssignmentPattern"
-    delete node.operator
+    node.type = "AssignmentPattern";
+    delete node.operator;
   } else {
     return this.dummyIdent()
   }
   return node
-}
+};
 
 lp$2.toAssignableList = function(exprList, binding) {
   var this$1 = this;
 
-  for (var i = 0; i < exprList.length; i++)
-    exprList[i] = this$1.toAssignable(exprList[i], binding)
+  for (var i = 0, list = exprList; i < list.length; i += 1)
+    {
+    var expr = list[i];
+
+    this$1.toAssignable(expr, binding);
+  }
   return exprList
-}
+};
 
 lp$2.parseFunctionParams = function(params) {
-  params = this.parseExprList(tokTypes.parenR)
+  params = this.parseExprList(tokTypes.parenR);
   return this.toAssignableList(params, true)
-}
+};
 
 lp$2.parseMethod = function(isGenerator, isAsync) {
-  var node = this.startNode(), oldInAsync = this.inAsync
-  this.initFunction(node)
+  var node = this.startNode(), oldInAsync = this.inAsync;
+  this.initFunction(node);
   if (this.options.ecmaVersion >= 6)
-    node.generator = !!isGenerator
+    { node.generator = !!isGenerator; }
   if (this.options.ecmaVersion >= 8)
-    node.async = !!isAsync
-  this.inAsync = node.async
-  node.params = this.parseFunctionParams()
-  node.expression = this.options.ecmaVersion >= 6 && this.tok.type !== tokTypes.braceL
-  node.body = node.expression ? this.parseMaybeAssign() : this.parseBlock()
-  this.inAsync = oldInAsync
+    { node.async = !!isAsync; }
+  this.inAsync = node.async;
+  node.params = this.parseFunctionParams();
+  node.expression = this.options.ecmaVersion >= 6 && this.tok.type !== tokTypes.braceL;
+  node.body = node.expression ? this.parseMaybeAssign() : this.parseBlock();
+  this.inAsync = oldInAsync;
   return this.finishNode(node, "FunctionExpression")
-}
+};
 
 lp$2.parseArrowExpression = function(node, params, isAsync) {
-  var oldInAsync = this.inAsync
-  this.initFunction(node)
+  var oldInAsync = this.inAsync;
+  this.initFunction(node);
   if (this.options.ecmaVersion >= 8)
-    node.async = !!isAsync
-  this.inAsync = node.async
-  node.params = this.toAssignableList(params, true)
-  node.expression = this.tok.type !== tokTypes.braceL
-  node.body = node.expression ? this.parseMaybeAssign() : this.parseBlock()
-  this.inAsync = oldInAsync
+    { node.async = !!isAsync; }
+  this.inAsync = node.async;
+  node.params = this.toAssignableList(params, true);
+  node.expression = this.tok.type !== tokTypes.braceL;
+  node.body = node.expression ? this.parseMaybeAssign() : this.parseBlock();
+  this.inAsync = oldInAsync;
   return this.finishNode(node, "ArrowFunctionExpression")
-}
+};
 
 lp$2.parseExprList = function(close, allowEmpty) {
   var this$1 = this;
 
-  this.pushCx()
-  var indent = this.curIndent, line = this.curLineStart, elts = []
-  this.next() // Opening bracket
+  this.pushCx();
+  var indent = this.curIndent, line = this.curLineStart, elts = [];
+  this.next(); // Opening bracket
   while (!this.closes(close, indent + 1, line)) {
     if (this$1.eat(tokTypes.comma)) {
-      elts.push(allowEmpty ? null : this$1.dummyIdent())
+      elts.push(allowEmpty ? null : this$1.dummyIdent());
       continue
     }
-    var elt = this$1.parseMaybeAssign()
+    var elt = this$1.parseMaybeAssign();
     if (isDummy(elt)) {
-      if (this$1.closes(close, indent, line)) break
-      this$1.next()
+      if (this$1.closes(close, indent, line)) { break }
+      this$1.next();
     } else {
-      elts.push(elt)
+      elts.push(elt);
     }
-    this$1.eat(tokTypes.comma)
+    this$1.eat(tokTypes.comma);
   }
-  this.popCx()
+  this.popCx();
   if (!this.eat(close)) {
     // If there is no closing brace, make the node span to the start
     // of the next token (this is useful for Tern)
-    this.last.end = this.tok.start
-    if (this.options.locations) this.last.loc.end = this.tok.loc.start
+    this.last.end = this.tok.start;
+    if (this.options.locations) { this.last.loc.end = this.tok.loc.start; }
   }
   return elts
-}
+};
 
 lp$2.parseAwait = function() {
-  var node = this.startNode()
-  this.next()
-  node.argument = this.parseMaybeUnary()
+  var node = this.startNode();
+  this.next();
+  node.argument = this.parseMaybeUnary();
   return this.finishNode(node, "AwaitExpression")
-}
+};
 
 // Acorn: Loose parser
 //
@@ -1352,15 +1372,13 @@ lp$2.parseAwait = function() {
 // invasive changes and simplifications without creating a complicated
 // tangle.
 
-defaultOptions.tabSize = 4
+defaultOptions.tabSize = 4;
 
 // eslint-disable-next-line camelcase
 function parse_dammit(input, options) {
-  var p = new LooseParser(input, options)
-  p.next()
-  return p.parseTopLevel()
+  return new LooseParser(input, options).parse()
 }
 
-addLooseExports(parse_dammit, LooseParser, pluginsLoose)
+addLooseExports(parse_dammit, LooseParser, pluginsLoose);
 
-export { parse_dammit, LooseParser, pluginsLoose };
-\ No newline at end of file
+export { parse_dammit, LooseParser, pluginsLoose };
diff --git a/node_modules/acorn/dist/acorn_loose.js b/node_modules/acorn/dist/acorn_loose.js
index 6ad0085da..ce8638b82 100644
--- a/node_modules/acorn/dist/acorn_loose.js
+++ b/node_modules/acorn/dist/acorn_loose.js
@@ -1,32 +1,32 @@
 (function (global, factory) {
-  typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports, require('./acorn')) :
-  typeof define === 'function' && define.amd ? define(['exports', './acorn'], factory) :
-  (factory((global.acorn = global.acorn || {}, global.acorn.loose = global.acorn.loose || {}),global.acorn));
+	typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports, require('./acorn')) :
+	typeof define === 'function' && define.amd ? define(['exports', './acorn'], factory) :
+	(factory((global.acorn = global.acorn || {}, global.acorn.loose = global.acorn.loose || {}),global.acorn));
 }(this, (function (exports,__acorn) { 'use strict';
 
 // Registered plugins
-var pluginsLoose = {}
+var pluginsLoose = {};
 
 var LooseParser = function LooseParser(input, options) {
   if ( options === void 0 ) options = {};
 
-  this.toks = __acorn.tokenizer(input, options)
-  this.options = this.toks.options
-  this.input = this.toks.input
-  this.tok = this.last = {type: __acorn.tokTypes.eof, start: 0, end: 0}
+  this.toks = __acorn.tokenizer(input, options);
+  this.options = this.toks.options;
+  this.input = this.toks.input;
+  this.tok = this.last = {type: __acorn.tokTypes.eof, start: 0, end: 0};
   if (this.options.locations) {
-    var here = this.toks.curPosition()
-    this.tok.loc = new __acorn.SourceLocation(this.toks, here, here)
+    var here = this.toks.curPosition();
+    this.tok.loc = new __acorn.SourceLocation(this.toks, here, here);
   }
-  this.ahead = [] // Tokens ahead
-  this.context = [] // Indentation contexted
-  this.curIndent = 0
-  this.curLineStart = 0
-  this.nextLineStart = this.lineEnd(this.curLineStart) + 1
-  this.inAsync = false
+  this.ahead = []; // Tokens ahead
+  this.context = []; // Indentation contexted
+  this.curIndent = 0;
+  this.curLineStart = 0;
+  this.nextLineStart = this.lineEnd(this.curLineStart) + 1;
+  this.inAsync = false;
   // Load plugins
-  this.options.pluginsLoose = options.pluginsLoose || {}
-  this.loadPlugins(this.options.pluginsLoose)
+  this.options.pluginsLoose = options.pluginsLoose || {};
+  this.loadPlugins(this.options.pluginsLoose);
 };
 
 LooseParser.prototype.startNode = function startNode () {
@@ -46,42 +46,42 @@ LooseParser.prototype.startNodeAt = function startNodeAt (pos) {
 };
 
 LooseParser.prototype.finishNode = function finishNode (node, type) {
-  node.type = type
-  node.end = this.last.end
+  node.type = type;
+  node.end = this.last.end;
   if (this.options.locations)
-    node.loc.end = this.last.loc.end
+    { node.loc.end = this.last.loc.end; }
   if (this.options.ranges)
-    node.range[1] = this.last.end
+    { node.range[1] = this.last.end; }
   return node
 };
 
 LooseParser.prototype.dummyNode = function dummyNode (type) {
-  var dummy = this.startNode()
-  dummy.type = type
-  dummy.end = dummy.start
+  var dummy = this.startNode();
+  dummy.type = type;
+  dummy.end = dummy.start;
   if (this.options.locations)
-    dummy.loc.end = dummy.loc.start
+    { dummy.loc.end = dummy.loc.start; }
   if (this.options.ranges)
-    dummy.range[1] = dummy.start
-  this.last = {type: __acorn.tokTypes.name, start: dummy.start, end: dummy.start, loc: dummy.loc}
+    { dummy.range[1] = dummy.start; }
+  this.last = {type: __acorn.tokTypes.name, start: dummy.start, end: dummy.start, loc: dummy.loc};
   return dummy
 };
 
 LooseParser.prototype.dummyIdent = function dummyIdent () {
-  var dummy = this.dummyNode("Identifier")
-  dummy.name = "✖"
+  var dummy = this.dummyNode("Identifier");
+  dummy.name = "✖";
   return dummy
 };
 
 LooseParser.prototype.dummyString = function dummyString () {
-  var dummy = this.dummyNode("Literal")
-  dummy.value = dummy.raw = "✖"
+  var dummy = this.dummyNode("Literal");
+  dummy.value = dummy.raw = "✖";
   return dummy
 };
 
 LooseParser.prototype.eat = function eat (type) {
   if (this.tok.type === type) {
-    this.next()
+    this.next();
     return true
   } else {
     return false
@@ -108,25 +108,25 @@ LooseParser.prototype.semicolon = function semicolon () {
 LooseParser.prototype.expect = function expect (type) {
     var this$1 = this;
 
-  if (this.eat(type)) return true
+  if (this.eat(type)) { return true }
   for (var i = 1; i <= 2; i++) {
     if (this$1.lookAhead(i).type == type) {
-      for (var j = 0; j < i; j++) this$1.next()
+      for (var j = 0; j < i; j++) { this$1.next(); }
       return true
     }
   }
 };
 
 LooseParser.prototype.pushCx = function pushCx () {
-  this.context.push(this.curIndent)
+  this.context.push(this.curIndent);
 };
 
 LooseParser.prototype.popCx = function popCx () {
-  this.curIndent = this.context.pop()
+  this.curIndent = this.context.pop();
 };
 
 LooseParser.prototype.lineEnd = function lineEnd (pos) {
-  while (pos < this.input.length && !__acorn.isNewLine(this.input.charCodeAt(pos))) ++pos
+  while (pos < this.input.length && !__acorn.isNewLine(this.input.charCodeAt(pos))) { ++pos; }
   return pos
 };
 
@@ -134,15 +134,15 @@ LooseParser.prototype.indentationAfter = function indentationAfter (pos) {
     var this$1 = this;
 
   for (var count = 0;; ++pos) {
-    var ch = this$1.input.charCodeAt(pos)
-    if (ch === 32) ++count
-    else if (ch === 9) count += this$1.options.tabSize
-    else return count
+    var ch = this$1.input.charCodeAt(pos);
+    if (ch === 32) { ++count; }
+    else if (ch === 9) { count += this$1.options.tabSize; }
+    else { return count }
   }
 };
 
 LooseParser.prototype.closes = function closes (closeTok, indent, line, blockHeuristic) {
-  if (this.tok.type === closeTok || this.tok.type === __acorn.tokTypes.eof) return true
+  if (this.tok.type === closeTok || this.tok.type === __acorn.tokTypes.eof) { return true }
   return line != this.curLineStart && this.curIndent < indent && this.tokenStartsLine() &&
     (!blockHeuristic || this.nextLineStart >= this.input.length ||
      this.indentationAfter(this.nextLineStart) < indent)
@@ -152,27 +152,32 @@ LooseParser.prototype.tokenStartsLine = function tokenStartsLine () {
     var this$1 = this;
 
   for (var p = this.tok.start - 1; p >= this.curLineStart; --p) {
-    var ch = this$1.input.charCodeAt(p)
-    if (ch !== 9 && ch !== 32) return false
+    var ch = this$1.input.charCodeAt(p);
+    if (ch !== 9 && ch !== 32) { return false }
   }
   return true
 };
 
 LooseParser.prototype.extend = function extend (name, f) {
-  this[name] = f(this[name])
+  this[name] = f(this[name]);
 };
 
 LooseParser.prototype.loadPlugins = function loadPlugins (pluginConfigs) {
     var this$1 = this;
 
   for (var name in pluginConfigs) {
-    var plugin = pluginsLoose[name]
-    if (!plugin) throw new Error("Plugin '" + name + "' not found")
-    plugin(this$1, pluginConfigs[name])
+    var plugin = pluginsLoose[name];
+    if (!plugin) { throw new Error("Plugin '" + name + "' not found") }
+    plugin(this$1, pluginConfigs[name]);
   }
 };
 
-var lp = LooseParser.prototype
+LooseParser.prototype.parse = function parse () {
+  this.next();
+  return this.parseTopLevel()
+};
+
+var lp = LooseParser.prototype;
 
 function isSpace(ch) {
   return (ch < 14 && ch > 8) || ch === 32 || ch === 160 || __acorn.isNewLine(ch)
@@ -181,254 +186,254 @@ function isSpace(ch) {
 lp.next = function() {
   var this$1 = this;
 
-  this.last = this.tok
+  this.last = this.tok;
   if (this.ahead.length)
-    this.tok = this.ahead.shift()
+    { this.tok = this.ahead.shift(); }
   else
-    this.tok = this.readToken()
+    { this.tok = this.readToken(); }
 
   if (this.tok.start >= this.nextLineStart) {
     while (this.tok.start >= this.nextLineStart) {
-      this$1.curLineStart = this$1.nextLineStart
-      this$1.nextLineStart = this$1.lineEnd(this$1.curLineStart) + 1
+      this$1.curLineStart = this$1.nextLineStart;
+      this$1.nextLineStart = this$1.lineEnd(this$1.curLineStart) + 1;
     }
-    this.curIndent = this.indentationAfter(this.curLineStart)
+    this.curIndent = this.indentationAfter(this.curLineStart);
   }
-}
+};
 
 lp.readToken = function() {
   var this$1 = this;
 
   for (;;) {
     try {
-      this$1.toks.next()
+      this$1.toks.next();
       if (this$1.toks.type === __acorn.tokTypes.dot &&
           this$1.input.substr(this$1.toks.end, 1) === "." &&
           this$1.options.ecmaVersion >= 6) {
-        this$1.toks.end++
-        this$1.toks.type = __acorn.tokTypes.ellipsis
+        this$1.toks.end++;
+        this$1.toks.type = __acorn.tokTypes.ellipsis;
       }
       return new __acorn.Token(this$1.toks)
     } catch (e) {
-      if (!(e instanceof SyntaxError)) throw e
+      if (!(e instanceof SyntaxError)) { throw e }
 
       // Try to skip some text, based on the error message, and then continue
-      var msg = e.message, pos = e.raisedAt, replace = true
+      var msg = e.message, pos = e.raisedAt, replace = true;
       if (/unterminated/i.test(msg)) {
-        pos = this$1.lineEnd(e.pos + 1)
+        pos = this$1.lineEnd(e.pos + 1);
         if (/string/.test(msg)) {
-          replace = {start: e.pos, end: pos, type: __acorn.tokTypes.string, value: this$1.input.slice(e.pos + 1, pos)}
+          replace = {start: e.pos, end: pos, type: __acorn.tokTypes.string, value: this$1.input.slice(e.pos + 1, pos)};
         } else if (/regular expr/i.test(msg)) {
-          var re = this$1.input.slice(e.pos, pos)
-          try { re = new RegExp(re) } catch (e) { /* ignore compilation error due to new syntax */ }
-          replace = {start: e.pos, end: pos, type: __acorn.tokTypes.regexp, value: re}
+          var re = this$1.input.slice(e.pos, pos);
+          try { re = new RegExp(re); } catch (e) { /* ignore compilation error due to new syntax */ }
+          replace = {start: e.pos, end: pos, type: __acorn.tokTypes.regexp, value: re};
         } else if (/template/.test(msg)) {
           replace = {
             start: e.pos,
             end: pos,
             type: __acorn.tokTypes.template,
             value: this$1.input.slice(e.pos, pos)
-          }
+          };
         } else {
-          replace = false
+          replace = false;
         }
       } else if (/invalid (unicode|regexp|number)|expecting unicode|octal literal|is reserved|directly after number|expected number in radix/i.test(msg)) {
-        while (pos < this.input.length && !isSpace(this.input.charCodeAt(pos))) ++pos
+        while (pos < this.input.length && !isSpace(this.input.charCodeAt(pos))) { ++pos; }
       } else if (/character escape|expected hexadecimal/i.test(msg)) {
         while (pos < this.input.length) {
-          var ch = this$1.input.charCodeAt(pos++)
-          if (ch === 34 || ch === 39 || __acorn.isNewLine(ch)) break
+          var ch = this$1.input.charCodeAt(pos++);
+          if (ch === 34 || ch === 39 || __acorn.isNewLine(ch)) { break }
         }
       } else if (/unexpected character/i.test(msg)) {
-        pos++
-        replace = false
+        pos++;
+        replace = false;
       } else if (/regular expression/i.test(msg)) {
-        replace = true
+        replace = true;
       } else {
         throw e
       }
-      this$1.resetTo(pos)
-      if (replace === true) replace = {start: pos, end: pos, type: __acorn.tokTypes.name, value: "✖"}
+      this$1.resetTo(pos);
+      if (replace === true) { replace = {start: pos, end: pos, type: __acorn.tokTypes.name, value: "✖"}; }
       if (replace) {
         if (this$1.options.locations)
-          replace.loc = new __acorn.SourceLocation(
+          { replace.loc = new __acorn.SourceLocation(
             this$1.toks,
             __acorn.getLineInfo(this$1.input, replace.start),
-            __acorn.getLineInfo(this$1.input, replace.end))
+            __acorn.getLineInfo(this$1.input, replace.end)); }
         return replace
       }
     }
   }
-}
+};
 
 lp.resetTo = function(pos) {
   var this$1 = this;
 
-  this.toks.pos = pos
-  var ch = this.input.charAt(pos - 1)
+  this.toks.pos = pos;
+  var ch = this.input.charAt(pos - 1);
   this.toks.exprAllowed = !ch || /[[{(,;:?/*=+\-~!|&%^<>]/.test(ch) ||
     /[enwfd]/.test(ch) &&
-    /\b(keywords|case|else|return|throw|new|in|(instance|type)of|delete|void)$/.test(this.input.slice(pos - 10, pos))
+    /\b(keywords|case|else|return|throw|new|in|(instance|type)of|delete|void)$/.test(this.input.slice(pos - 10, pos));
 
   if (this.options.locations) {
-    this.toks.curLine = 1
-    this.toks.lineStart = __acorn.lineBreakG.lastIndex = 0
-    var match
+    this.toks.curLine = 1;
+    this.toks.lineStart = __acorn.lineBreakG.lastIndex = 0;
+    var match;
     while ((match = __acorn.lineBreakG.exec(this.input)) && match.index < pos) {
-      ++this$1.toks.curLine
-      this$1.toks.lineStart = match.index + match[0].length
+      ++this$1.toks.curLine;
+      this$1.toks.lineStart = match.index + match[0].length;
     }
   }
-}
+};
 
 lp.lookAhead = function(n) {
   var this$1 = this;
 
   while (n > this.ahead.length)
-    this$1.ahead.push(this$1.readToken())
+    { this$1.ahead.push(this$1.readToken()); }
   return this.ahead[n - 1]
-}
+};
 
 function isDummy(node) { return node.name == "✖" }
 
-var lp$1 = LooseParser.prototype
+var lp$1 = LooseParser.prototype;
 
 lp$1.parseTopLevel = function() {
   var this$1 = this;
 
-  var node = this.startNodeAt(this.options.locations ? [0, __acorn.getLineInfo(this.input, 0)] : 0)
-  node.body = []
-  while (this.tok.type !== __acorn.tokTypes.eof) node.body.push(this$1.parseStatement())
-  this.last = this.tok
+  var node = this.startNodeAt(this.options.locations ? [0, __acorn.getLineInfo(this.input, 0)] : 0);
+  node.body = [];
+  while (this.tok.type !== __acorn.tokTypes.eof) { node.body.push(this$1.parseStatement()); }
+  this.last = this.tok;
   if (this.options.ecmaVersion >= 6) {
-    node.sourceType = this.options.sourceType
+    node.sourceType = this.options.sourceType;
   }
   return this.finishNode(node, "Program")
-}
+};
 
 lp$1.parseStatement = function() {
   var this$1 = this;
 
-  var starttype = this.tok.type, node = this.startNode(), kind
+  var starttype = this.tok.type, node = this.startNode(), kind;
 
   if (this.toks.isLet()) {
-    starttype = __acorn.tokTypes._var
-    kind = "let"
+    starttype = __acorn.tokTypes._var;
+    kind = "let";
   }
 
   switch (starttype) {
   case __acorn.tokTypes._break: case __acorn.tokTypes._continue:
-    this.next()
-    var isBreak = starttype === __acorn.tokTypes._break
+    this.next();
+    var isBreak = starttype === __acorn.tokTypes._break;
     if (this.semicolon() || this.canInsertSemicolon()) {
-      node.label = null
+      node.label = null;
     } else {
-      node.label = this.tok.type === __acorn.tokTypes.name ? this.parseIdent() : null
-      this.semicolon()
+      node.label = this.tok.type === __acorn.tokTypes.name ? this.parseIdent() : null;
+      this.semicolon();
     }
     return this.finishNode(node, isBreak ? "BreakStatement" : "ContinueStatement")
 
   case __acorn.tokTypes._debugger:
-    this.next()
-    this.semicolon()
+    this.next();
+    this.semicolon();
     return this.finishNode(node, "DebuggerStatement")
 
   case __acorn.tokTypes._do:
-    this.next()
-    node.body = this.parseStatement()
-    node.test = this.eat(__acorn.tokTypes._while) ? this.parseParenExpression() : this.dummyIdent()
-    this.semicolon()
+    this.next();
+    node.body = this.parseStatement();
+    node.test = this.eat(__acorn.tokTypes._while) ? this.parseParenExpression() : this.dummyIdent();
+    this.semicolon();
     return this.finishNode(node, "DoWhileStatement")
 
   case __acorn.tokTypes._for:
-    this.next()
-    this.pushCx()
-    this.expect(__acorn.tokTypes.parenL)
-    if (this.tok.type === __acorn.tokTypes.semi) return this.parseFor(node, null)
-    var isLet = this.toks.isLet()
+    this.next();
+    this.pushCx();
+    this.expect(__acorn.tokTypes.parenL);
+    if (this.tok.type === __acorn.tokTypes.semi) { return this.parseFor(node, null) }
+    var isLet = this.toks.isLet();
     if (isLet || this.tok.type === __acorn.tokTypes._var || this.tok.type === __acorn.tokTypes._const) {
-      var init$1 = this.parseVar(true, isLet ? "let" : this.tok.value)
+      var init$1 = this.parseVar(true, isLet ? "let" : this.tok.value);
       if (init$1.declarations.length === 1 && (this.tok.type === __acorn.tokTypes._in || this.isContextual("of"))) {
         return this.parseForIn(node, init$1)
       }
       return this.parseFor(node, init$1)
     }
-    var init = this.parseExpression(true)
+    var init = this.parseExpression(true);
     if (this.tok.type === __acorn.tokTypes._in || this.isContextual("of"))
-      return this.parseForIn(node, this.toAssignable(init))
+      { return this.parseForIn(node, this.toAssignable(init)) }
     return this.parseFor(node, init)
 
   case __acorn.tokTypes._function:
-    this.next()
+    this.next();
     return this.parseFunction(node, true)
 
   case __acorn.tokTypes._if:
-    this.next()
-    node.test = this.parseParenExpression()
-    node.consequent = this.parseStatement()
-    node.alternate = this.eat(__acorn.tokTypes._else) ? this.parseStatement() : null
+    this.next();
+    node.test = this.parseParenExpression();
+    node.consequent = this.parseStatement();
+    node.alternate = this.eat(__acorn.tokTypes._else) ? this.parseStatement() : null;
     return this.finishNode(node, "IfStatement")
 
   case __acorn.tokTypes._return:
-    this.next()
-    if (this.eat(__acorn.tokTypes.semi) || this.canInsertSemicolon()) node.argument = null
-    else { node.argument = this.parseExpression(); this.semicolon() }
+    this.next();
+    if (this.eat(__acorn.tokTypes.semi) || this.canInsertSemicolon()) { node.argument = null; }
+    else { node.argument = this.parseExpression(); this.semicolon(); }
     return this.finishNode(node, "ReturnStatement")
 
   case __acorn.tokTypes._switch:
-    var blockIndent = this.curIndent, line = this.curLineStart
-    this.next()
-    node.discriminant = this.parseParenExpression()
-    node.cases = []
-    this.pushCx()
-    this.expect(__acorn.tokTypes.braceL)
-
-    var cur
+    var blockIndent = this.curIndent, line = this.curLineStart;
+    this.next();
+    node.discriminant = this.parseParenExpression();
+    node.cases = [];
+    this.pushCx();
+    this.expect(__acorn.tokTypes.braceL);
+
+    var cur;
     while (!this.closes(__acorn.tokTypes.braceR, blockIndent, line, true)) {
       if (this$1.tok.type === __acorn.tokTypes._case || this$1.tok.type === __acorn.tokTypes._default) {
-        var isCase = this$1.tok.type === __acorn.tokTypes._case
-        if (cur) this$1.finishNode(cur, "SwitchCase")
-        node.cases.push(cur = this$1.startNode())
-        cur.consequent = []
-        this$1.next()
-        if (isCase) cur.test = this$1.parseExpression()
-        else cur.test = null
-        this$1.expect(__acorn.tokTypes.colon)
+        var isCase = this$1.tok.type === __acorn.tokTypes._case;
+        if (cur) { this$1.finishNode(cur, "SwitchCase"); }
+        node.cases.push(cur = this$1.startNode());
+        cur.consequent = [];
+        this$1.next();
+        if (isCase) { cur.test = this$1.parseExpression(); }
+        else { cur.test = null; }
+        this$1.expect(__acorn.tokTypes.colon);
       } else {
         if (!cur) {
-          node.cases.push(cur = this$1.startNode())
-          cur.consequent = []
-          cur.test = null
+          node.cases.push(cur = this$1.startNode());
+          cur.consequent = [];
+          cur.test = null;
         }
-        cur.consequent.push(this$1.parseStatement())
+        cur.consequent.push(this$1.parseStatement());
       }
     }
-    if (cur) this.finishNode(cur, "SwitchCase")
-    this.popCx()
-    this.eat(__acorn.tokTypes.braceR)
+    if (cur) { this.finishNode(cur, "SwitchCase"); }
+    this.popCx();
+    this.eat(__acorn.tokTypes.braceR);
     return this.finishNode(node, "SwitchStatement")
 
   case __acorn.tokTypes._throw:
-    this.next()
-    node.argument = this.parseExpression()
-    this.semicolon()
+    this.next();
+    node.argument = this.parseExpression();
+    this.semicolon();
     return this.finishNode(node, "ThrowStatement")
 
   case __acorn.tokTypes._try:
-    this.next()
-    node.block = this.parseBlock()
-    node.handler = null
+    this.next();
+    node.block = this.parseBlock();
+    node.handler = null;
     if (this.tok.type === __acorn.tokTypes._catch) {
-      var clause = this.startNode()
-      this.next()
-      this.expect(__acorn.tokTypes.parenL)
-      clause.param = this.toAssignable(this.parseExprAtom(), true)
-      this.expect(__acorn.tokTypes.parenR)
-      clause.body = this.parseBlock()
-      node.handler = this.finishNode(clause, "CatchClause")
+      var clause = this.startNode();
+      this.next();
+      this.expect(__acorn.tokTypes.parenL);
+      clause.param = this.toAssignable(this.parseExprAtom(), true);
+      this.expect(__acorn.tokTypes.parenR);
+      clause.body = this.parseBlock();
+      node.handler = this.finishNode(clause, "CatchClause");
     }
-    node.finalizer = this.eat(__acorn.tokTypes._finally) ? this.parseBlock() : null
-    if (!node.handler && !node.finalizer) return node.block
+    node.finalizer = this.eat(__acorn.tokTypes._finally) ? this.parseBlock() : null;
+    if (!node.handler && !node.finalizer) { return node.block }
     return this.finishNode(node, "TryStatement")
 
   case __acorn.tokTypes._var:
@@ -436,22 +441,22 @@ lp$1.parseStatement = function() {
     return this.parseVar(false, kind || this.tok.value)
 
   case __acorn.tokTypes._while:
-    this.next()
-    node.test = this.parseParenExpression()
-    node.body = this.parseStatement()
+    this.next();
+    node.test = this.parseParenExpression();
+    node.body = this.parseStatement();
     return this.finishNode(node, "WhileStatement")
 
   case __acorn.tokTypes._with:
-    this.next()
-    node.object = this.parseParenExpression()
-    node.body = this.parseStatement()
+    this.next();
+    node.object = this.parseParenExpression();
+    node.body = this.parseStatement();
     return this.finishNode(node, "WithStatement")
 
   case __acorn.tokTypes.braceL:
     return this.parseBlock()
 
   case __acorn.tokTypes.semi:
-    this.next()
+    this.next();
     return this.finishNode(node, "EmptyStatement")
 
   case __acorn.tokTypes._class:
@@ -465,448 +470,448 @@ lp$1.parseStatement = function() {
 
   default:
     if (this.toks.isAsyncFunction()) {
-      this.next()
-      this.next()
+      this.next();
+      this.next();
       return this.parseFunction(node, true, true)
     }
-    var expr = this.parseExpression()
+    var expr = this.parseExpression();
     if (isDummy(expr)) {
-      this.next()
-      if (this.tok.type === __acorn.tokTypes.eof) return this.finishNode(node, "EmptyStatement")
+      this.next();
+      if (this.tok.type === __acorn.tokTypes.eof) { return this.finishNode(node, "EmptyStatement") }
       return this.parseStatement()
     } else if (starttype === __acorn.tokTypes.name && expr.type === "Identifier" && this.eat(__acorn.tokTypes.colon)) {
-      node.body = this.parseStatement()
-      node.label = expr
+      node.body = this.parseStatement();
+      node.label = expr;
       return this.finishNode(node, "LabeledStatement")
     } else {
-      node.expression = expr
-      this.semicolon()
+      node.expression = expr;
+      this.semicolon();
       return this.finishNode(node, "ExpressionStatement")
     }
   }
-}
+};
 
 lp$1.parseBlock = function() {
   var this$1 = this;
 
-  var node = this.startNode()
-  this.pushCx()
-  this.expect(__acorn.tokTypes.braceL)
-  var blockIndent = this.curIndent, line = this.curLineStart
-  node.body = []
+  var node = this.startNode();
+  this.pushCx();
+  this.expect(__acorn.tokTypes.braceL);
+  var blockIndent = this.curIndent, line = this.curLineStart;
+  node.body = [];
   while (!this.closes(__acorn.tokTypes.braceR, blockIndent, line, true))
-    node.body.push(this$1.parseStatement())
-  this.popCx()
-  this.eat(__acorn.tokTypes.braceR)
+    { node.body.push(this$1.parseStatement()); }
+  this.popCx();
+  this.eat(__acorn.tokTypes.braceR);
   return this.finishNode(node, "BlockStatement")
-}
+};
 
 lp$1.parseFor = function(node, init) {
-  node.init = init
-  node.test = node.update = null
-  if (this.eat(__acorn.tokTypes.semi) && this.tok.type !== __acorn.tokTypes.semi) node.test = this.parseExpression()
-  if (this.eat(__acorn.tokTypes.semi) && this.tok.type !== __acorn.tokTypes.parenR) node.update = this.parseExpression()
-  this.popCx()
-  this.expect(__acorn.tokTypes.parenR)
-  node.body = this.parseStatement()
+  node.init = init;
+  node.test = node.update = null;
+  if (this.eat(__acorn.tokTypes.semi) && this.tok.type !== __acorn.tokTypes.semi) { node.test = this.parseExpression(); }
+  if (this.eat(__acorn.tokTypes.semi) && this.tok.type !== __acorn.tokTypes.parenR) { node.update = this.parseExpression(); }
+  this.popCx();
+  this.expect(__acorn.tokTypes.parenR);
+  node.body = this.parseStatement();
   return this.finishNode(node, "ForStatement")
-}
+};
 
 lp$1.parseForIn = function(node, init) {
-  var type = this.tok.type === __acorn.tokTypes._in ? "ForInStatement" : "ForOfStatement"
-  this.next()
-  node.left = init
-  node.right = this.parseExpression()
-  this.popCx()
-  this.expect(__acorn.tokTypes.parenR)
-  node.body = this.parseStatement()
+  var type = this.tok.type === __acorn.tokTypes._in ? "ForInStatement" : "ForOfStatement";
+  this.next();
+  node.left = init;
+  node.right = this.parseExpression();
+  this.popCx();
+  this.expect(__acorn.tokTypes.parenR);
+  node.body = this.parseStatement();
   return this.finishNode(node, type)
-}
+};
 
 lp$1.parseVar = function(noIn, kind) {
   var this$1 = this;
 
-  var node = this.startNode()
-  node.kind = kind
-  this.next()
-  node.declarations = []
+  var node = this.startNode();
+  node.kind = kind;
+  this.next();
+  node.declarations = [];
   do {
-    var decl = this$1.startNode()
-    decl.id = this$1.options.ecmaVersion >= 6 ? this$1.toAssignable(this$1.parseExprAtom(), true) : this$1.parseIdent()
-    decl.init = this$1.eat(__acorn.tokTypes.eq) ? this$1.parseMaybeAssign(noIn) : null
-    node.declarations.push(this$1.finishNode(decl, "VariableDeclarator"))
+    var decl = this$1.startNode();
+    decl.id = this$1.options.ecmaVersion >= 6 ? this$1.toAssignable(this$1.parseExprAtom(), true) : this$1.parseIdent();
+    decl.init = this$1.eat(__acorn.tokTypes.eq) ? this$1.parseMaybeAssign(noIn) : null;
+    node.declarations.push(this$1.finishNode(decl, "VariableDeclarator"));
   } while (this.eat(__acorn.tokTypes.comma))
   if (!node.declarations.length) {
-    var decl$1 = this.startNode()
-    decl$1.id = this.dummyIdent()
-    node.declarations.push(this.finishNode(decl$1, "VariableDeclarator"))
+    var decl$1 = this.startNode();
+    decl$1.id = this.dummyIdent();
+    node.declarations.push(this.finishNode(decl$1, "VariableDeclarator"));
   }
-  if (!noIn) this.semicolon()
+  if (!noIn) { this.semicolon(); }
   return this.finishNode(node, "VariableDeclaration")
-}
+};
 
 lp$1.parseClass = function(isStatement) {
   var this$1 = this;
 
-  var node = this.startNode()
-  this.next()
-  if (this.tok.type === __acorn.tokTypes.name) node.id = this.parseIdent()
-  else if (isStatement === true) node.id = this.dummyIdent()
-  else node.id = null
-  node.superClass = this.eat(__acorn.tokTypes._extends) ? this.parseExpression() : null
-  node.body = this.startNode()
-  node.body.body = []
-  this.pushCx()
-  var indent = this.curIndent + 1, line = this.curLineStart
-  this.eat(__acorn.tokTypes.braceL)
-  if (this.curIndent + 1 < indent) { indent = this.curIndent; line = this.curLineStart }
+  var node = this.startNode();
+  this.next();
+  if (this.tok.type === __acorn.tokTypes.name) { node.id = this.parseIdent(); }
+  else if (isStatement === true) { node.id = this.dummyIdent(); }
+  else { node.id = null; }
+  node.superClass = this.eat(__acorn.tokTypes._extends) ? this.parseExpression() : null;
+  node.body = this.startNode();
+  node.body.body = [];
+  this.pushCx();
+  var indent = this.curIndent + 1, line = this.curLineStart;
+  this.eat(__acorn.tokTypes.braceL);
+  if (this.curIndent + 1 < indent) { indent = this.curIndent; line = this.curLineStart; }
   while (!this.closes(__acorn.tokTypes.braceR, indent, line)) {
-    if (this$1.semicolon()) continue
-    var method = this$1.startNode(), isGenerator, isAsync
+    if (this$1.semicolon()) { continue }
+    var method = this$1.startNode(), isGenerator = (void 0), isAsync = (void 0);
     if (this$1.options.ecmaVersion >= 6) {
-      method.static = false
-      isGenerator = this$1.eat(__acorn.tokTypes.star)
+      method.static = false;
+      isGenerator = this$1.eat(__acorn.tokTypes.star);
     }
-    this$1.parsePropertyName(method)
-    if (isDummy(method.key)) { if (isDummy(this$1.parseMaybeAssign())) this$1.next(); this$1.eat(__acorn.tokTypes.comma); continue }
+    this$1.parsePropertyName(method);
+    if (isDummy(method.key)) { if (isDummy(this$1.parseMaybeAssign())) { this$1.next(); } this$1.eat(__acorn.tokTypes.comma); continue }
     if (method.key.type === "Identifier" && !method.computed && method.key.name === "static" &&
         (this$1.tok.type != __acorn.tokTypes.parenL && this$1.tok.type != __acorn.tokTypes.braceL)) {
-      method.static = true
-      isGenerator = this$1.eat(__acorn.tokTypes.star)
-      this$1.parsePropertyName(method)
+      method.static = true;
+      isGenerator = this$1.eat(__acorn.tokTypes.star);
+      this$1.parsePropertyName(method);
     } else {
-      method.static = false
+      method.static = false;
     }
     if (!method.computed &&
         method.key.type === "Identifier" && method.key.name === "async" && this$1.tok.type !== __acorn.tokTypes.parenL &&
         !this$1.canInsertSemicolon()) {
-      this$1.parsePropertyName(method)
-      isAsync = true
+      this$1.parsePropertyName(method);
+      isAsync = true;
     } else {
-      isAsync = false
+      isAsync = false;
     }
     if (this$1.options.ecmaVersion >= 5 && method.key.type === "Identifier" &&
         !method.computed && (method.key.name === "get" || method.key.name === "set") &&
         this$1.tok.type !== __acorn.tokTypes.parenL && this$1.tok.type !== __acorn.tokTypes.braceL) {
-      method.kind = method.key.name
-      this$1.parsePropertyName(method)
-      method.value = this$1.parseMethod(false)
+      method.kind = method.key.name;
+      this$1.parsePropertyName(method);
+      method.value = this$1.parseMethod(false);
     } else {
       if (!method.computed && !method.static && !isGenerator && !isAsync && (
         method.key.type === "Identifier" && method.key.name === "constructor" ||
           method.key.type === "Literal" && method.key.value === "constructor")) {
-        method.kind = "constructor"
+        method.kind = "constructor";
       } else {
-        method.kind = "method"
+        method.kind = "method";
       }
-      method.value = this$1.parseMethod(isGenerator, isAsync)
+      method.value = this$1.parseMethod(isGenerator, isAsync);
     }
-    node.body.body.push(this$1.finishNode(method, "MethodDefinition"))
+    node.body.body.push(this$1.finishNode(method, "MethodDefinition"));
   }
-  this.popCx()
+  this.popCx();
   if (!this.eat(__acorn.tokTypes.braceR)) {
     // If there is no closing brace, make the node span to the start
     // of the next token (this is useful for Tern)
-    this.last.end = this.tok.start
-    if (this.options.locations) this.last.loc.end = this.tok.loc.start
+    this.last.end = this.tok.start;
+    if (this.options.locations) { this.last.loc.end = this.tok.loc.start; }
   }
-  this.semicolon()
-  this.finishNode(node.body, "ClassBody")
+  this.semicolon();
+  this.finishNode(node.body, "ClassBody");
   return this.finishNode(node, isStatement ? "ClassDeclaration" : "ClassExpression")
-}
+};
 
 lp$1.parseFunction = function(node, isStatement, isAsync) {
-  var oldInAsync = this.inAsync
-  this.initFunction(node)
+  var oldInAsync = this.inAsync;
+  this.initFunction(node);
   if (this.options.ecmaVersion >= 6) {
-    node.generator = this.eat(__acorn.tokTypes.star)
+    node.generator = this.eat(__acorn.tokTypes.star);
   }
   if (this.options.ecmaVersion >= 8) {
-    node.async = !!isAsync
+    node.async = !!isAsync;
   }
-  if (this.tok.type === __acorn.tokTypes.name) node.id = this.parseIdent()
-  else if (isStatement === true) node.id = this.dummyIdent()
-  this.inAsync = node.async
-  node.params = this.parseFunctionParams()
-  node.body = this.parseBlock()
-  this.inAsync = oldInAsync
+  if (this.tok.type === __acorn.tokTypes.name) { node.id = this.parseIdent(); }
+  else if (isStatement === true) { node.id = this.dummyIdent(); }
+  this.inAsync = node.async;
+  node.params = this.parseFunctionParams();
+  node.body = this.parseBlock();
+  this.inAsync = oldInAsync;
   return this.finishNode(node, isStatement ? "FunctionDeclaration" : "FunctionExpression")
-}
+};
 
 lp$1.parseExport = function() {
-  var node = this.startNode()
-  this.next()
+  var node = this.startNode();
+  this.next();
   if (this.eat(__acorn.tokTypes.star)) {
-    node.source = this.eatContextual("from") ? this.parseExprAtom() : this.dummyString()
+    node.source = this.eatContextual("from") ? this.parseExprAtom() : this.dummyString();
     return this.finishNode(node, "ExportAllDeclaration")
   }
   if (this.eat(__acorn.tokTypes._default)) {
     // export default (function foo() {}) // This is FunctionExpression.
-    var isAsync
+    var isAsync;
     if (this.tok.type === __acorn.tokTypes._function || (isAsync = this.toks.isAsyncFunction())) {
-      var fNode = this.startNode()
-      this.next()
-      if (isAsync) this.next()
-      node.declaration = this.parseFunction(fNode, "nullableID", isAsync)
+      var fNode = this.startNode();
+      this.next();
+      if (isAsync) { this.next(); }
+      node.declaration = this.parseFunction(fNode, "nullableID", isAsync);
     } else if (this.tok.type === __acorn.tokTypes._class) {
-      node.declaration = this.parseClass("nullableID")
+      node.declaration = this.parseClass("nullableID");
     } else {
-      node.declaration = this.parseMaybeAssign()
-      this.semicolon()
+      node.declaration = this.parseMaybeAssign();
+      this.semicolon();
     }
     return this.finishNode(node, "ExportDefaultDeclaration")
   }
   if (this.tok.type.keyword || this.toks.isLet() || this.toks.isAsyncFunction()) {
-    node.declaration = this.parseStatement()
-    node.specifiers = []
-    node.source = null
+    node.declaration = this.parseStatement();
+    node.specifiers = [];
+    node.source = null;
   } else {
-    node.declaration = null
-    node.specifiers = this.parseExportSpecifierList()
-    node.source = this.eatContextual("from") ? this.parseExprAtom() : null
-    this.semicolon()
+    node.declaration = null;
+    node.specifiers = this.parseExportSpecifierList();
+    node.source = this.eatContextual("from") ? this.parseExprAtom() : null;
+    this.semicolon();
   }
   return this.finishNode(node, "ExportNamedDeclaration")
-}
+};
 
 lp$1.parseImport = function() {
-  var node = this.startNode()
-  this.next()
+  var node = this.startNode();
+  this.next();
   if (this.tok.type === __acorn.tokTypes.string) {
-    node.specifiers = []
-    node.source = this.parseExprAtom()
-    node.kind = ""
+    node.specifiers = [];
+    node.source = this.parseExprAtom();
+    node.kind = "";
   } else {
-    var elt
+    var elt;
     if (this.tok.type === __acorn.tokTypes.name && this.tok.value !== "from") {
-      elt = this.startNode()
-      elt.local = this.parseIdent()
-      this.finishNode(elt, "ImportDefaultSpecifier")
-      this.eat(__acorn.tokTypes.comma)
+      elt = this.startNode();
+      elt.local = this.parseIdent();
+      this.finishNode(elt, "ImportDefaultSpecifier");
+      this.eat(__acorn.tokTypes.comma);
     }
-    node.specifiers = this.parseImportSpecifierList()
-    node.source = this.eatContextual("from") && this.tok.type == __acorn.tokTypes.string ? this.parseExprAtom() : this.dummyString()
-    if (elt) node.specifiers.unshift(elt)
+    node.specifiers = this.parseImportSpecifierList();
+    node.source = this.eatContextual("from") && this.tok.type == __acorn.tokTypes.string ? this.parseExprAtom() : this.dummyString();
+    if (elt) { node.specifiers.unshift(elt); }
   }
-  this.semicolon()
+  this.semicolon();
   return this.finishNode(node, "ImportDeclaration")
-}
+};
 
 lp$1.parseImportSpecifierList = function() {
   var this$1 = this;
 
-  var elts = []
+  var elts = [];
   if (this.tok.type === __acorn.tokTypes.star) {
-    var elt = this.startNode()
-    this.next()
-    elt.local = this.eatContextual("as") ? this.parseIdent() : this.dummyIdent()
-    elts.push(this.finishNode(elt, "ImportNamespaceSpecifier"))
+    var elt = this.startNode();
+    this.next();
+    elt.local = this.eatContextual("as") ? this.parseIdent() : this.dummyIdent();
+    elts.push(this.finishNode(elt, "ImportNamespaceSpecifier"));
   } else {
-    var indent = this.curIndent, line = this.curLineStart, continuedLine = this.nextLineStart
-    this.pushCx()
-    this.eat(__acorn.tokTypes.braceL)
-    if (this.curLineStart > continuedLine) continuedLine = this.curLineStart
+    var indent = this.curIndent, line = this.curLineStart, continuedLine = this.nextLineStart;
+    this.pushCx();
+    this.eat(__acorn.tokTypes.braceL);
+    if (this.curLineStart > continuedLine) { continuedLine = this.curLineStart; }
     while (!this.closes(__acorn.tokTypes.braceR, indent + (this.curLineStart <= continuedLine ? 1 : 0), line)) {
-      var elt$1 = this$1.startNode()
+      var elt$1 = this$1.startNode();
       if (this$1.eat(__acorn.tokTypes.star)) {
-        elt$1.local = this$1.eatContextual("as") ? this$1.parseIdent() : this$1.dummyIdent()
-        this$1.finishNode(elt$1, "ImportNamespaceSpecifier")
+        elt$1.local = this$1.eatContextual("as") ? this$1.parseIdent() : this$1.dummyIdent();
+        this$1.finishNode(elt$1, "ImportNamespaceSpecifier");
       } else {
-        if (this$1.isContextual("from")) break
-        elt$1.imported = this$1.parseIdent()
-        if (isDummy(elt$1.imported)) break
-        elt$1.local = this$1.eatContextual("as") ? this$1.parseIdent() : elt$1.imported
-        this$1.finishNode(elt$1, "ImportSpecifier")
+        if (this$1.isContextual("from")) { break }
+        elt$1.imported = this$1.parseIdent();
+        if (isDummy(elt$1.imported)) { break }
+        elt$1.local = this$1.eatContextual("as") ? this$1.parseIdent() : elt$1.imported;
+        this$1.finishNode(elt$1, "ImportSpecifier");
       }
-      elts.push(elt$1)
-      this$1.eat(__acorn.tokTypes.comma)
+      elts.push(elt$1);
+      this$1.eat(__acorn.tokTypes.comma);
     }
-    this.eat(__acorn.tokTypes.braceR)
-    this.popCx()
+    this.eat(__acorn.tokTypes.braceR);
+    this.popCx();
   }
   return elts
-}
+};
 
 lp$1.parseExportSpecifierList = function() {
   var this$1 = this;
 
-  var elts = []
-  var indent = this.curIndent, line = this.curLineStart, continuedLine = this.nextLineStart
-  this.pushCx()
-  this.eat(__acorn.tokTypes.braceL)
-  if (this.curLineStart > continuedLine) continuedLine = this.curLineStart
+  var elts = [];
+  var indent = this.curIndent, line = this.curLineStart, continuedLine = this.nextLineStart;
+  this.pushCx();
+  this.eat(__acorn.tokTypes.braceL);
+  if (this.curLineStart > continuedLine) { continuedLine = this.curLineStart; }
   while (!this.closes(__acorn.tokTypes.braceR, indent + (this.curLineStart <= continuedLine ? 1 : 0), line)) {
-    if (this$1.isContextual("from")) break
-    var elt = this$1.startNode()
-    elt.local = this$1.parseIdent()
-    if (isDummy(elt.local)) break
-    elt.exported = this$1.eatContextual("as") ? this$1.parseIdent() : elt.local
-    this$1.finishNode(elt, "ExportSpecifier")
-    elts.push(elt)
-    this$1.eat(__acorn.tokTypes.comma)
+    if (this$1.isContextual("from")) { break }
+    var elt = this$1.startNode();
+    elt.local = this$1.parseIdent();
+    if (isDummy(elt.local)) { break }
+    elt.exported = this$1.eatContextual("as") ? this$1.parseIdent() : elt.local;
+    this$1.finishNode(elt, "ExportSpecifier");
+    elts.push(elt);
+    this$1.eat(__acorn.tokTypes.comma);
   }
-  this.eat(__acorn.tokTypes.braceR)
-  this.popCx()
+  this.eat(__acorn.tokTypes.braceR);
+  this.popCx();
   return elts
-}
+};
 
-var lp$2 = LooseParser.prototype
+var lp$2 = LooseParser.prototype;
 
 lp$2.checkLVal = function(expr) {
-  if (!expr) return expr
+  if (!expr) { return expr }
   switch (expr.type) {
   case "Identifier":
   case "MemberExpression":
     return expr
 
   case "ParenthesizedExpression":
-    expr.expression = this.checkLVal(expr.expression)
+    expr.expression = this.checkLVal(expr.expression);
     return expr
 
   default:
     return this.dummyIdent()
   }
-}
+};
 
 lp$2.parseExpression = function(noIn) {
   var this$1 = this;
 
-  var start = this.storeCurrentPos()
-  var expr = this.parseMaybeAssign(noIn)
+  var start = this.storeCurrentPos();
+  var expr = this.parseMaybeAssign(noIn);
   if (this.tok.type === __acorn.tokTypes.comma) {
-    var node = this.startNodeAt(start)
-    node.expressions = [expr]
-    while (this.eat(__acorn.tokTypes.comma)) node.expressions.push(this$1.parseMaybeAssign(noIn))
+    var node = this.startNodeAt(start);
+    node.expressions = [expr];
+    while (this.eat(__acorn.tokTypes.comma)) { node.expressions.push(this$1.parseMaybeAssign(noIn)); }
     return this.finishNode(node, "SequenceExpression")
   }
   return expr
-}
+};
 
 lp$2.parseParenExpression = function() {
-  this.pushCx()
-  this.expect(__acorn.tokTypes.parenL)
-  var val = this.parseExpression()
-  this.popCx()
-  this.expect(__acorn.tokTypes.parenR)
+  this.pushCx();
+  this.expect(__acorn.tokTypes.parenL);
+  var val = this.parseExpression();
+  this.popCx();
+  this.expect(__acorn.tokTypes.parenR);
   return val
-}
+};
 
 lp$2.parseMaybeAssign = function(noIn) {
   if (this.toks.isContextual("yield")) {
-    var node = this.startNode()
-    this.next()
+    var node = this.startNode();
+    this.next();
     if (this.semicolon() || this.canInsertSemicolon() || (this.tok.type != __acorn.tokTypes.star && !this.tok.type.startsExpr)) {
-      node.delegate = false
-      node.argument = null
+      node.delegate = false;
+      node.argument = null;
     } else {
-      node.delegate = this.eat(__acorn.tokTypes.star)
-      node.argument = this.parseMaybeAssign()
+      node.delegate = this.eat(__acorn.tokTypes.star);
+      node.argument = this.parseMaybeAssign();
     }
     return this.finishNode(node, "YieldExpression")
   }
 
-  var start = this.storeCurrentPos()
-  var left = this.parseMaybeConditional(noIn)
+  var start = this.storeCurrentPos();
+  var left = this.parseMaybeConditional(noIn);
   if (this.tok.type.isAssign) {
-    var node$1 = this.startNodeAt(start)
-    node$1.operator = this.tok.value
-    node$1.left = this.tok.type === __acorn.tokTypes.eq ? this.toAssignable(left) : this.checkLVal(left)
-    this.next()
-    node$1.right = this.parseMaybeAssign(noIn)
+    var node$1 = this.startNodeAt(start);
+    node$1.operator = this.tok.value;
+    node$1.left = this.tok.type === __acorn.tokTypes.eq ? this.toAssignable(left) : this.checkLVal(left);
+    this.next();
+    node$1.right = this.parseMaybeAssign(noIn);
     return this.finishNode(node$1, "AssignmentExpression")
   }
   return left
-}
+};
 
 lp$2.parseMaybeConditional = function(noIn) {
-  var start = this.storeCurrentPos()
-  var expr = this.parseExprOps(noIn)
+  var start = this.storeCurrentPos();
+  var expr = this.parseExprOps(noIn);
   if (this.eat(__acorn.tokTypes.question)) {
-    var node = this.startNodeAt(start)
-    node.test = expr
-    node.consequent = this.parseMaybeAssign()
-    node.alternate = this.expect(__acorn.tokTypes.colon) ? this.parseMaybeAssign(noIn) : this.dummyIdent()
+    var node = this.startNodeAt(start);
+    node.test = expr;
+    node.consequent = this.parseMaybeAssign();
+    node.alternate = this.expect(__acorn.tokTypes.colon) ? this.parseMaybeAssign(noIn) : this.dummyIdent();
     return this.finishNode(node, "ConditionalExpression")
   }
   return expr
-}
+};
 
 lp$2.parseExprOps = function(noIn) {
-  var start = this.storeCurrentPos()
-  var indent = this.curIndent, line = this.curLineStart
+  var start = this.storeCurrentPos();
+  var indent = this.curIndent, line = this.curLineStart;
   return this.parseExprOp(this.parseMaybeUnary(false), start, -1, noIn, indent, line)
-}
+};
 
 lp$2.parseExprOp = function(left, start, minPrec, noIn, indent, line) {
-  if (this.curLineStart != line && this.curIndent < indent && this.tokenStartsLine()) return left
-  var prec = this.tok.type.binop
+  if (this.curLineStart != line && this.curIndent < indent && this.tokenStartsLine()) { return left }
+  var prec = this.tok.type.binop;
   if (prec != null && (!noIn || this.tok.type !== __acorn.tokTypes._in)) {
     if (prec > minPrec) {
-      var node = this.startNodeAt(start)
-      node.left = left
-      node.operator = this.tok.value
-      this.next()
+      var node = this.startNodeAt(start);
+      node.left = left;
+      node.operator = this.tok.value;
+      this.next();
       if (this.curLineStart != line && this.curIndent < indent && this.tokenStartsLine()) {
-        node.right = this.dummyIdent()
+        node.right = this.dummyIdent();
       } else {
-        var rightStart = this.storeCurrentPos()
-        node.right = this.parseExprOp(this.parseMaybeUnary(false), rightStart, prec, noIn, indent, line)
+        var rightStart = this.storeCurrentPos();
+        node.right = this.parseExprOp(this.parseMaybeUnary(false), rightStart, prec, noIn, indent, line);
       }
-      this.finishNode(node, /&&|\|\|/.test(node.operator) ? "LogicalExpression" : "BinaryExpression")
+      this.finishNode(node, /&&|\|\|/.test(node.operator) ? "LogicalExpression" : "BinaryExpression");
       return this.parseExprOp(node, start, minPrec, noIn, indent, line)
     }
   }
   return left
-}
+};
 
 lp$2.parseMaybeUnary = function(sawUnary) {
   var this$1 = this;
 
-  var start = this.storeCurrentPos(), expr
+  var start = this.storeCurrentPos(), expr;
   if (this.options.ecmaVersion >= 8 && this.inAsync && this.toks.isContextual("await")) {
-    expr = this.parseAwait()
-    sawUnary = true
+    expr = this.parseAwait();
+    sawUnary = true;
   } else if (this.tok.type.prefix) {
-    var node = this.startNode(), update = this.tok.type === __acorn.tokTypes.incDec
-    if (!update) sawUnary = true
-    node.operator = this.tok.value
-    node.prefix = true
-    this.next()
-    node.argument = this.parseMaybeUnary(true)
-    if (update) node.argument = this.checkLVal(node.argument)
-    expr = this.finishNode(node, update ? "UpdateExpression" : "UnaryExpression")
+    var node = this.startNode(), update = this.tok.type === __acorn.tokTypes.incDec;
+    if (!update) { sawUnary = true; }
+    node.operator = this.tok.value;
+    node.prefix = true;
+    this.next();
+    node.argument = this.parseMaybeUnary(true);
+    if (update) { node.argument = this.checkLVal(node.argument); }
+    expr = this.finishNode(node, update ? "UpdateExpression" : "UnaryExpression");
   } else if (this.tok.type === __acorn.tokTypes.ellipsis) {
-    var node$1 = this.startNode()
-    this.next()
-    node$1.argument = this.parseMaybeUnary(sawUnary)
-    expr = this.finishNode(node$1, "SpreadElement")
+    var node$1 = this.startNode();
+    this.next();
+    node$1.argument = this.parseMaybeUnary(sawUnary);
+    expr = this.finishNode(node$1, "SpreadElement");
   } else {
-    expr = this.parseExprSubscripts()
+    expr = this.parseExprSubscripts();
     while (this.tok.type.postfix && !this.canInsertSemicolon()) {
-      var node$2 = this$1.startNodeAt(start)
-      node$2.operator = this$1.tok.value
-      node$2.prefix = false
-      node$2.argument = this$1.checkLVal(expr)
-      this$1.next()
-      expr = this$1.finishNode(node$2, "UpdateExpression")
+      var node$2 = this$1.startNodeAt(start);
+      node$2.operator = this$1.tok.value;
+      node$2.prefix = false;
+      node$2.argument = this$1.checkLVal(expr);
+      this$1.next();
+      expr = this$1.finishNode(node$2, "UpdateExpression");
     }
   }
 
   if (!sawUnary && this.eat(__acorn.tokTypes.starstar)) {
-    var node$3 = this.startNodeAt(start)
-    node$3.operator = "**"
-    node$3.left = expr
-    node$3.right = this.parseMaybeUnary(false)
+    var node$3 = this.startNodeAt(start);
+    node$3.operator = "**";
+    node$3.left = expr;
+    node$3.right = this.parseMaybeUnary(false);
     return this.finishNode(node$3, "BinaryExpression")
   }
 
   return expr
-}
+};
 
 lp$2.parseExprSubscripts = function() {
-  var start = this.storeCurrentPos()
+  var start = this.storeCurrentPos();
   return this.parseSubscripts(this.parseExprAtom(), start, false, this.curIndent, this.curLineStart)
-}
+};
 
 lp$2.parseSubscripts = function(base, start, noCalls, startIndent, line) {
   var this$1 = this;
@@ -914,120 +919,120 @@ lp$2.parseSubscripts = function(base, start, noCalls, startIndent, line) {
   for (;;) {
     if (this$1.curLineStart != line && this$1.curIndent <= startIndent && this$1.tokenStartsLine()) {
       if (this$1.tok.type == __acorn.tokTypes.dot && this$1.curIndent == startIndent)
-        --startIndent
+        { --startIndent; }
       else
-        return base
+        { return base }
     }
 
-    var maybeAsyncArrow = base.type === "Identifier" && base.name === "async" && !this$1.canInsertSemicolon()
+    var maybeAsyncArrow = base.type === "Identifier" && base.name === "async" && !this$1.canInsertSemicolon();
 
     if (this$1.eat(__acorn.tokTypes.dot)) {
-      var node = this$1.startNodeAt(start)
-      node.object = base
+      var node = this$1.startNodeAt(start);
+      node.object = base;
       if (this$1.curLineStart != line && this$1.curIndent <= startIndent && this$1.tokenStartsLine())
-        node.property = this$1.dummyIdent()
+        { node.property = this$1.dummyIdent(); }
       else
-        node.property = this$1.parsePropertyAccessor() || this$1.dummyIdent()
-      node.computed = false
-      base = this$1.finishNode(node, "MemberExpression")
+        { node.property = this$1.parsePropertyAccessor() || this$1.dummyIdent(); }
+      node.computed = false;
+      base = this$1.finishNode(node, "MemberExpression");
     } else if (this$1.tok.type == __acorn.tokTypes.bracketL) {
-      this$1.pushCx()
-      this$1.next()
-      var node$1 = this$1.startNodeAt(start)
-      node$1.object = base
-      node$1.property = this$1.parseExpression()
-      node$1.computed = true
-      this$1.popCx()
-      this$1.expect(__acorn.tokTypes.bracketR)
-      base = this$1.finishNode(node$1, "MemberExpression")
+      this$1.pushCx();
+      this$1.next();
+      var node$1 = this$1.startNodeAt(start);
+      node$1.object = base;
+      node$1.property = this$1.parseExpression();
+      node$1.computed = true;
+      this$1.popCx();
+      this$1.expect(__acorn.tokTypes.bracketR);
+      base = this$1.finishNode(node$1, "MemberExpression");
     } else if (!noCalls && this$1.tok.type == __acorn.tokTypes.parenL) {
-      var exprList = this$1.parseExprList(__acorn.tokTypes.parenR)
+      var exprList = this$1.parseExprList(__acorn.tokTypes.parenR);
       if (maybeAsyncArrow && this$1.eat(__acorn.tokTypes.arrow))
-        return this$1.parseArrowExpression(this$1.startNodeAt(start), exprList, true)
-      var node$2 = this$1.startNodeAt(start)
-      node$2.callee = base
-      node$2.arguments = exprList
-      base = this$1.finishNode(node$2, "CallExpression")
+        { return this$1.parseArrowExpression(this$1.startNodeAt(start), exprList, true) }
+      var node$2 = this$1.startNodeAt(start);
+      node$2.callee = base;
+      node$2.arguments = exprList;
+      base = this$1.finishNode(node$2, "CallExpression");
     } else if (this$1.tok.type == __acorn.tokTypes.backQuote) {
-      var node$3 = this$1.startNodeAt(start)
-      node$3.tag = base
-      node$3.quasi = this$1.parseTemplate()
-      base = this$1.finishNode(node$3, "TaggedTemplateExpression")
+      var node$3 = this$1.startNodeAt(start);
+      node$3.tag = base;
+      node$3.quasi = this$1.parseTemplate();
+      base = this$1.finishNode(node$3, "TaggedTemplateExpression");
     } else {
       return base
     }
   }
-}
+};
 
 lp$2.parseExprAtom = function() {
-  var node
+  var node;
   switch (this.tok.type) {
   case __acorn.tokTypes._this:
   case __acorn.tokTypes._super:
-    var type = this.tok.type === __acorn.tokTypes._this ? "ThisExpression" : "Super"
-    node = this.startNode()
-    this.next()
+    var type = this.tok.type === __acorn.tokTypes._this ? "ThisExpression" : "Super";
+    node = this.startNode();
+    this.next();
     return this.finishNode(node, type)
 
   case __acorn.tokTypes.name:
-    var start = this.storeCurrentPos()
-    var id = this.parseIdent()
-    var isAsync = false
+    var start = this.storeCurrentPos();
+    var id = this.parseIdent();
+    var isAsync = false;
     if (id.name === "async" && !this.canInsertSemicolon()) {
       if (this.eat(__acorn.tokTypes._function))
-        return this.parseFunction(this.startNodeAt(start), false, true)
+        { return this.parseFunction(this.startNodeAt(start), false, true) }
       if (this.tok.type === __acorn.tokTypes.name) {
-        id = this.parseIdent()
-        isAsync = true
+        id = this.parseIdent();
+        isAsync = true;
       }
     }
     return this.eat(__acorn.tokTypes.arrow) ? this.parseArrowExpression(this.startNodeAt(start), [id], isAsync) : id
 
   case __acorn.tokTypes.regexp:
-    node = this.startNode()
-    var val = this.tok.value
-    node.regex = {pattern: val.pattern, flags: val.flags}
-    node.value = val.value
-    node.raw = this.input.slice(this.tok.start, this.tok.end)
-    this.next()
+    node = this.startNode();
+    var val = this.tok.value;
+    node.regex = {pattern: val.pattern, flags: val.flags};
+    node.value = val.value;
+    node.raw = this.input.slice(this.tok.start, this.tok.end);
+    this.next();
     return this.finishNode(node, "Literal")
 
   case __acorn.tokTypes.num: case __acorn.tokTypes.string:
-    node = this.startNode()
-    node.value = this.tok.value
-    node.raw = this.input.slice(this.tok.start, this.tok.end)
-    this.next()
+    node = this.startNode();
+    node.value = this.tok.value;
+    node.raw = this.input.slice(this.tok.start, this.tok.end);
+    this.next();
     return this.finishNode(node, "Literal")
 
   case __acorn.tokTypes._null: case __acorn.tokTypes._true: case __acorn.tokTypes._false:
-    node = this.startNode()
-    node.value = this.tok.type === __acorn.tokTypes._null ? null : this.tok.type === __acorn.tokTypes._true
-    node.raw = this.tok.type.keyword
-    this.next()
+    node = this.startNode();
+    node.value = this.tok.type === __acorn.tokTypes._null ? null : this.tok.type === __acorn.tokTypes._true;
+    node.raw = this.tok.type.keyword;
+    this.next();
     return this.finishNode(node, "Literal")
 
   case __acorn.tokTypes.parenL:
-    var parenStart = this.storeCurrentPos()
-    this.next()
-    var inner = this.parseExpression()
-    this.expect(__acorn.tokTypes.parenR)
+    var parenStart = this.storeCurrentPos();
+    this.next();
+    var inner = this.parseExpression();
+    this.expect(__acorn.tokTypes.parenR);
     if (this.eat(__acorn.tokTypes.arrow)) {
       // (a,)=>a // SequenceExpression makes dummy in the last hole. Drop the dummy.
-      var params = inner.expressions || [inner]
+      var params = inner.expressions || [inner];
       if (params.length && isDummy(params[params.length - 1]))
-        params.pop()
+        { params.pop(); }
       return this.parseArrowExpression(this.startNodeAt(parenStart), params)
     }
     if (this.options.preserveParens) {
-      var par = this.startNodeAt(parenStart)
-      par.expression = inner
-      inner = this.finishNode(par, "ParenthesizedExpression")
+      var par = this.startNodeAt(parenStart);
+      par.expression = inner;
+      inner = this.finishNode(par, "ParenthesizedExpression");
     }
     return inner
 
   case __acorn.tokTypes.bracketL:
-    node = this.startNode()
-    node.elements = this.parseExprList(__acorn.tokTypes.bracketR, true)
+    node = this.startNode();
+    node.elements = this.parseExprList(__acorn.tokTypes.bracketR, true);
     return this.finishNode(node, "ArrayExpression")
 
   case __acorn.tokTypes.braceL:
@@ -1037,8 +1042,8 @@ lp$2.parseExprAtom = function() {
     return this.parseClass(false)
 
   case __acorn.tokTypes._function:
-    node = this.startNode()
-    this.next()
+    node = this.startNode();
+    this.next();
     return this.parseFunction(node, false)
 
   case __acorn.tokTypes._new:
@@ -1050,170 +1055,177 @@ lp$2.parseExprAtom = function() {
   default:
     return this.dummyIdent()
   }
-}
+};
 
 lp$2.parseNew = function() {
-  var node = this.startNode(), startIndent = this.curIndent, line = this.curLineStart
-  var meta = this.parseIdent(true)
+  var node = this.startNode(), startIndent = this.curIndent, line = this.curLineStart;
+  var meta = this.parseIdent(true);
   if (this.options.ecmaVersion >= 6 && this.eat(__acorn.tokTypes.dot)) {
-    node.meta = meta
-    node.property = this.parseIdent(true)
+    node.meta = meta;
+    node.property = this.parseIdent(true);
     return this.finishNode(node, "MetaProperty")
   }
-  var start = this.storeCurrentPos()
-  node.callee = this.parseSubscripts(this.parseExprAtom(), start, true, startIndent, line)
+  var start = this.storeCurrentPos();
+  node.callee = this.parseSubscripts(this.parseExprAtom(), start, true, startIndent, line);
   if (this.tok.type == __acorn.tokTypes.parenL) {
-    node.arguments = this.parseExprList(__acorn.tokTypes.parenR)
+    node.arguments = this.parseExprList(__acorn.tokTypes.parenR);
   } else {
-    node.arguments = []
+    node.arguments = [];
   }
   return this.finishNode(node, "NewExpression")
-}
+};
 
 lp$2.parseTemplateElement = function() {
-  var elem = this.startNode()
-  elem.value = {
-    raw: this.input.slice(this.tok.start, this.tok.end).replace(/\r\n?/g, "\n"),
-    cooked: this.tok.value
+  var elem = this.startNode();
+
+  // The loose parser accepts invalid unicode escapes even in untagged templates.
+  if (this.tok.type === __acorn.tokTypes.invalidTemplate) {
+    elem.value = {
+      raw: this.tok.value,
+      cooked: null
+    };
+  } else {
+    elem.value = {
+      raw: this.input.slice(this.tok.start, this.tok.end).replace(/\r\n?/g, "\n"),
+      cooked: this.tok.value
+    };
   }
-  this.next()
-  elem.tail = this.tok.type === __acorn.tokTypes.backQuote
+  this.next();
+  elem.tail = this.tok.type === __acorn.tokTypes.backQuote;
   return this.finishNode(elem, "TemplateElement")
-}
+};
 
 lp$2.parseTemplate = function() {
   var this$1 = this;
 
-  var node = this.startNode()
-  this.next()
-  node.expressions = []
-  var curElt = this.parseTemplateElement()
-  node.quasis = [curElt]
+  var node = this.startNode();
+  this.next();
+  node.expressions = [];
+  var curElt = this.parseTemplateElement();
+  node.quasis = [curElt];
   while (!curElt.tail) {
-    this$1.next()
-    node.expressions.push(this$1.parseExpression())
+    this$1.next();
+    node.expressions.push(this$1.parseExpression());
     if (this$1.expect(__acorn.tokTypes.braceR)) {
-      curElt = this$1.parseTemplateElement()
+      curElt = this$1.parseTemplateElement();
     } else {
-      curElt = this$1.startNode()
-      curElt.value = {cooked: "", raw: ""}
-      curElt.tail = true
-      this$1.finishNode(curElt, "TemplateElement")
+      curElt = this$1.startNode();
+      curElt.value = {cooked: "", raw: ""};
+      curElt.tail = true;
+      this$1.finishNode(curElt, "TemplateElement");
     }
-    node.quasis.push(curElt)
+    node.quasis.push(curElt);
   }
-  this.expect(__acorn.tokTypes.backQuote)
+  this.expect(__acorn.tokTypes.backQuote);
   return this.finishNode(node, "TemplateLiteral")
-}
+};
 
 lp$2.parseObj = function() {
   var this$1 = this;
 
-  var node = this.startNode()
-  node.properties = []
-  this.pushCx()
-  var indent = this.curIndent + 1, line = this.curLineStart
-  this.eat(__acorn.tokTypes.braceL)
-  if (this.curIndent + 1 < indent) { indent = this.curIndent; line = this.curLineStart }
+  var node = this.startNode();
+  node.properties = [];
+  this.pushCx();
+  var indent = this.curIndent + 1, line = this.curLineStart;
+  this.eat(__acorn.tokTypes.braceL);
+  if (this.curIndent + 1 < indent) { indent = this.curIndent; line = this.curLineStart; }
   while (!this.closes(__acorn.tokTypes.braceR, indent, line)) {
-    var prop = this$1.startNode(), isGenerator, isAsync, start
+    var prop = this$1.startNode(), isGenerator = (void 0), isAsync = (void 0), start = (void 0);
     if (this$1.options.ecmaVersion >= 6) {
-      start = this$1.storeCurrentPos()
-      prop.method = false
-      prop.shorthand = false
-      isGenerator = this$1.eat(__acorn.tokTypes.star)
+      start = this$1.storeCurrentPos();
+      prop.method = false;
+      prop.shorthand = false;
+      isGenerator = this$1.eat(__acorn.tokTypes.star);
     }
-    this$1.parsePropertyName(prop)
-    if (!prop.computed &&
-        prop.key.type === "Identifier" && prop.key.name === "async" && this$1.tok.type !== __acorn.tokTypes.parenL &&
-        this$1.tok.type !== __acorn.tokTypes.colon && !this$1.canInsertSemicolon()) {
-      this$1.parsePropertyName(prop)
-      isAsync = true
+    this$1.parsePropertyName(prop);
+    if (this$1.toks.isAsyncProp(prop)) {
+      this$1.parsePropertyName(prop);
+      isAsync = true;
     } else {
-      isAsync = false
+      isAsync = false;
     }
-    if (isDummy(prop.key)) { if (isDummy(this$1.parseMaybeAssign())) this$1.next(); this$1.eat(__acorn.tokTypes.comma); continue }
+    if (isDummy(prop.key)) { if (isDummy(this$1.parseMaybeAssign())) { this$1.next(); } this$1.eat(__acorn.tokTypes.comma); continue }
     if (this$1.eat(__acorn.tokTypes.colon)) {
-      prop.kind = "init"
-      prop.value = this$1.parseMaybeAssign()
+      prop.kind = "init";
+      prop.value = this$1.parseMaybeAssign();
     } else if (this$1.options.ecmaVersion >= 6 && (this$1.tok.type === __acorn.tokTypes.parenL || this$1.tok.type === __acorn.tokTypes.braceL)) {
-      prop.kind = "init"
-      prop.method = true
-      prop.value = this$1.parseMethod(isGenerator, isAsync)
+      prop.kind = "init";
+      prop.method = true;
+      prop.value = this$1.parseMethod(isGenerator, isAsync);
     } else if (this$1.options.ecmaVersion >= 5 && prop.key.type === "Identifier" &&
                !prop.computed && (prop.key.name === "get" || prop.key.name === "set") &&
                (this$1.tok.type != __acorn.tokTypes.comma && this$1.tok.type != __acorn.tokTypes.braceR)) {
-      prop.kind = prop.key.name
-      this$1.parsePropertyName(prop)
-      prop.value = this$1.parseMethod(false)
+      prop.kind = prop.key.name;
+      this$1.parsePropertyName(prop);
+      prop.value = this$1.parseMethod(false);
     } else {
-      prop.kind = "init"
+      prop.kind = "init";
       if (this$1.options.ecmaVersion >= 6) {
         if (this$1.eat(__acorn.tokTypes.eq)) {
-          var assign = this$1.startNodeAt(start)
-          assign.operator = "="
-          assign.left = prop.key
-          assign.right = this$1.parseMaybeAssign()
-          prop.value = this$1.finishNode(assign, "AssignmentExpression")
+          var assign = this$1.startNodeAt(start);
+          assign.operator = "=";
+          assign.left = prop.key;
+          assign.right = this$1.parseMaybeAssign();
+          prop.value = this$1.finishNode(assign, "AssignmentExpression");
         } else {
-          prop.value = prop.key
+          prop.value = prop.key;
         }
       } else {
-        prop.value = this$1.dummyIdent()
+        prop.value = this$1.dummyIdent();
       }
-      prop.shorthand = true
+      prop.shorthand = true;
     }
-    node.properties.push(this$1.finishNode(prop, "Property"))
-    this$1.eat(__acorn.tokTypes.comma)
+    node.properties.push(this$1.finishNode(prop, "Property"));
+    this$1.eat(__acorn.tokTypes.comma);
   }
-  this.popCx()
+  this.popCx();
   if (!this.eat(__acorn.tokTypes.braceR)) {
     // If there is no closing brace, make the node span to the start
     // of the next token (this is useful for Tern)
-    this.last.end = this.tok.start
-    if (this.options.locations) this.last.loc.end = this.tok.loc.start
+    this.last.end = this.tok.start;
+    if (this.options.locations) { this.last.loc.end = this.tok.loc.start; }
   }
   return this.finishNode(node, "ObjectExpression")
-}
+};
 
 lp$2.parsePropertyName = function(prop) {
   if (this.options.ecmaVersion >= 6) {
     if (this.eat(__acorn.tokTypes.bracketL)) {
-      prop.computed = true
-      prop.key = this.parseExpression()
-      this.expect(__acorn.tokTypes.bracketR)
+      prop.computed = true;
+      prop.key = this.parseExpression();
+      this.expect(__acorn.tokTypes.bracketR);
       return
     } else {
-      prop.computed = false
+      prop.computed = false;
     }
   }
-  var key = (this.tok.type === __acorn.tokTypes.num || this.tok.type === __acorn.tokTypes.string) ? this.parseExprAtom() : this.parseIdent()
-  prop.key = key || this.dummyIdent()
-}
+  var key = (this.tok.type === __acorn.tokTypes.num || this.tok.type === __acorn.tokTypes.string) ? this.parseExprAtom() : this.parseIdent();
+  prop.key = key || this.dummyIdent();
+};
 
 lp$2.parsePropertyAccessor = function() {
-  if (this.tok.type === __acorn.tokTypes.name || this.tok.type.keyword) return this.parseIdent()
-}
+  if (this.tok.type === __acorn.tokTypes.name || this.tok.type.keyword) { return this.parseIdent() }
+};
 
 lp$2.parseIdent = function() {
-  var name = this.tok.type === __acorn.tokTypes.name ? this.tok.value : this.tok.type.keyword
-  if (!name) return this.dummyIdent()
-  var node = this.startNode()
-  this.next()
-  node.name = name
+  var name = this.tok.type === __acorn.tokTypes.name ? this.tok.value : this.tok.type.keyword;
+  if (!name) { return this.dummyIdent() }
+  var node = this.startNode();
+  this.next();
+  node.name = name;
   return this.finishNode(node, "Identifier")
-}
+};
 
 lp$2.initFunction = function(node) {
-  node.id = null
-  node.params = []
+  node.id = null;
+  node.params = [];
   if (this.options.ecmaVersion >= 6) {
-    node.generator = false
-    node.expression = false
+    node.generator = false;
+    node.expression = false;
   }
   if (this.options.ecmaVersion >= 8)
-    node.async = false
-}
+    { node.async = false; }
+};
 
 // Convert existing expression atom to assignable pattern
 // if possible.
@@ -1224,106 +1236,114 @@ lp$2.toAssignable = function(node, binding) {
   if (!node || node.type == "Identifier" || (node.type == "MemberExpression" && !binding)) {
     // Okay
   } else if (node.type == "ParenthesizedExpression") {
-    node.expression = this.toAssignable(node.expression, binding)
+    this.toAssignable(node.expression, binding);
   } else if (this.options.ecmaVersion < 6) {
     return this.dummyIdent()
   } else if (node.type == "ObjectExpression") {
-    node.type = "ObjectPattern"
-    var props = node.properties
-    for (var i = 0; i < props.length; i++)
-      props[i].value = this$1.toAssignable(props[i].value, binding)
+    node.type = "ObjectPattern";
+    var props = node.properties;
+    for (var i = 0, list = props; i < list.length; i += 1)
+      {
+      var prop = list[i];
+
+      this$1.toAssignable(prop.value, binding);
+    }
   } else if (node.type == "ArrayExpression") {
-    node.type = "ArrayPattern"
-    this.toAssignableList(node.elements, binding)
+    node.type = "ArrayPattern";
+    this.toAssignableList(node.elements, binding);
   } else if (node.type == "SpreadElement") {
-    node.type = "RestElement"
-    node.argument = this.toAssignable(node.argument, binding)
+    node.type = "RestElement";
+    this.toAssignable(node.argument, binding);
   } else if (node.type == "AssignmentExpression") {
-    node.type = "AssignmentPattern"
-    delete node.operator
+    node.type = "AssignmentPattern";
+    delete node.operator;
   } else {
     return this.dummyIdent()
   }
   return node
-}
+};
 
 lp$2.toAssignableList = function(exprList, binding) {
   var this$1 = this;
 
-  for (var i = 0; i < exprList.length; i++)
-    exprList[i] = this$1.toAssignable(exprList[i], binding)
+  for (var i = 0, list = exprList; i < list.length; i += 1)
+    {
+    var expr = list[i];
+
+    this$1.toAssignable(expr, binding);
+  }
   return exprList
-}
+};
 
 lp$2.parseFunctionParams = function(params) {
-  params = this.parseExprList(__acorn.tokTypes.parenR)
+  params = this.parseExprList(__acorn.tokTypes.parenR);
   return this.toAssignableList(params, true)
-}
+};
 
 lp$2.parseMethod = function(isGenerator, isAsync) {
-  var node = this.startNode(), oldInAsync = this.inAsync
-  this.initFunction(node)
+  var node = this.startNode(), oldInAsync = this.inAsync;
+  this.initFunction(node);
   if (this.options.ecmaVersion >= 6)
-    node.generator = !!isGenerator
+    { node.generator = !!isGenerator; }
   if (this.options.ecmaVersion >= 8)
-    node.async = !!isAsync
-  this.inAsync = node.async
-  node.params = this.parseFunctionParams()
-  node.expression = this.options.ecmaVersion >= 6 && this.tok.type !== __acorn.tokTypes.braceL
-  node.body = node.expression ? this.parseMaybeAssign() : this.parseBlock()
-  this.inAsync = oldInAsync
+    { node.async = !!isAsync; }
+  this.inAsync = node.async;
+  node.params = this.parseFunctionParams();
+  node.expression = this.options.ecmaVersion >= 6 && this.tok.type !== __acorn.tokTypes.braceL;
+  node.body = node.expression ? this.parseMaybeAssign() : this.parseBlock();
+  this.inAsync = oldInAsync;
   return this.finishNode(node, "FunctionExpression")
-}
+};
 
 lp$2.parseArrowExpression = function(node, params, isAsync) {
-  var oldInAsync = this.inAsync
-  this.initFunction(node)
+  var oldInAsync = this.inAsync;
+  this.initFunction(node);
   if (this.options.ecmaVersion >= 8)
-    node.async = !!isAsync
-  this.inAsync = node.async
-  node.params = this.toAssignableList(params, true)
-  node.expression = this.tok.type !== __acorn.tokTypes.braceL
-  node.body = node.expression ? this.parseMaybeAssign() : this.parseBlock()
-  this.inAsync = oldInAsync
+    { node.async = !!isAsync; }
+  this.inAsync = node.async;
+  node.params = this.toAssignableList(params, true);
+  node.expression = this.tok.type !== __acorn.tokTypes.braceL;
+  node.body = node.expression ? this.parseMaybeAssign() : this.parseBlock();
+  this.inAsync = oldInAsync;
   return this.finishNode(node, "ArrowFunctionExpression")
-}
+};
 
 lp$2.parseExprList = function(close, allowEmpty) {
   var this$1 = this;
 
-  this.pushCx()
-  var indent = this.curIndent, line = this.curLineStart, elts = []
-  this.next() // Opening bracket
+  this.pushCx();
+  var indent = this.curIndent, line = this.curLineStart, elts = [];
+  this.next(); // Opening bracket
   while (!this.closes(close, indent + 1, line)) {
     if (this$1.eat(__acorn.tokTypes.comma)) {
-      elts.push(allowEmpty ? null : this$1.dummyIdent())
+      elts.push(allowEmpty ? null : this$1.dummyIdent());
       continue
     }
-    var elt = this$1.parseMaybeAssign()
+    var elt = this$1.parseMaybeAssign();
     if (isDummy(elt)) {
-      if (this$1.closes(close, indent, line)) break
-      this$1.next()
+      if (this$1.closes(close, indent, line)) { break }
+      this$1.next();
     } else {
-      elts.push(elt)
+      elts.push(elt);
     }
-    this$1.eat(__acorn.tokTypes.comma)
+    this$1.eat(__acorn.tokTypes.comma);
   }
-  this.popCx()
+  this.popCx();
   if (!this.eat(close)) {
     // If there is no closing brace, make the node span to the start
     // of the next token (this is useful for Tern)
-    this.last.end = this.tok.start
-    if (this.options.locations) this.last.loc.end = this.tok.loc.start
+    this.last.end = this.tok.start;
+    if (this.options.locations) { this.last.loc.end = this.tok.loc.start; }
   }
   return elts
-}
+};
 
 lp$2.parseAwait = function() {
-  var node = this.startNode()
-  this.next()
-  node.argument = this.parseMaybeUnary()
+  var node = this.startNode();
+  this.next();
+  node.argument = this.parseMaybeUnary();
   return this.finishNode(node, "AwaitExpression")
-}
+};
 
 // Acorn: Loose parser
 //
@@ -1356,16 +1376,14 @@ lp$2.parseAwait = function() {
 // invasive changes and simplifications without creating a complicated
 // tangle.
 
-__acorn.defaultOptions.tabSize = 4
+__acorn.defaultOptions.tabSize = 4;
 
 // eslint-disable-next-line camelcase
 function parse_dammit(input, options) {
-  var p = new LooseParser(input, options)
-  p.next()
-  return p.parseTopLevel()
+  return new LooseParser(input, options).parse()
 }
 
-__acorn.addLooseExports(parse_dammit, LooseParser, pluginsLoose)
+__acorn.addLooseExports(parse_dammit, LooseParser, pluginsLoose);
 
 exports.parse_dammit = parse_dammit;
 exports.LooseParser = LooseParser;
@@ -1373,4 +1391,4 @@ exports.pluginsLoose = pluginsLoose;
 
 Object.defineProperty(exports, '__esModule', { value: true });
 
-})));
-\ No newline at end of file
+})));
diff --git a/node_modules/acorn/dist/walk.es.js b/node_modules/acorn/dist/walk.es.js
index 280b9a045..153534673 100644
--- a/node_modules/acorn/dist/walk.es.js
+++ b/node_modules/acorn/dist/walk.es.js
@@ -17,28 +17,27 @@
 // state.
 
 function simple(node, visitors, base, state, override) {
-  if (!base) base = exports.base
-  ;(function c(node, st, override) {
-    var type = override || node.type, found = visitors[type]
-    base[type](node, st, c)
-    if (found) found(node, st)
-  })(node, state, override)
+  if (!base) { base = exports.base
+  ; }(function c(node, st, override) {
+    var type = override || node.type, found = visitors[type];
+    base[type](node, st, c);
+    if (found) { found(node, st); }
+  })(node, state, override);
 }
 
 // An ancestor walk keeps an array of ancestor nodes (including the
 // current node) and passes them to the callback as third parameter
 // (and also as state parameter when no other state is present).
 function ancestor(node, visitors, base, state) {
-  if (!base) base = exports.base
-  var ancestors = []
-  ;(function c(node, st, override) {
-    var type = override || node.type, found = visitors[type]
-    var isNew = node != ancestors[ancestors.length - 1]
-    if (isNew) ancestors.push(node)
-    base[type](node, st, c)
-    if (found) found(node, st || ancestors, ancestors)
-    if (isNew) ancestors.pop()
-  })(node, state)
+  if (!base) { base = exports.base; }
+  var ancestors = [];(function c(node, st, override) {
+    var type = override || node.type, found = visitors[type];
+    var isNew = node != ancestors[ancestors.length - 1];
+    if (isNew) { ancestors.push(node); }
+    base[type](node, st, c);
+    if (found) { found(node, st || ancestors, ancestors); }
+    if (isNew) { ancestors.pop(); }
+  })(node, state);
 }
 
 // A recursive walk is one where your functions override the default
@@ -47,42 +46,65 @@ function ancestor(node, visitors, base, state) {
 // their child nodes (by calling their third argument on these
 // nodes).
 function recursive(node, state, funcs, base, override) {
-  var visitor = funcs ? exports.make(funcs, base) : base
-  ;(function c(node, st, override) {
-    visitor[override || node.type](node, st, c)
-  })(node, state, override)
+  var visitor = funcs ? exports.make(funcs, base) : base;(function c(node, st, override) {
+    visitor[override || node.type](node, st, c);
+  })(node, state, override);
 }
 
 function makeTest(test) {
   if (typeof test == "string")
-    return function (type) { return type == test; }
+    { return function (type) { return type == test; } }
   else if (!test)
-    return function () { return true; }
+    { return function () { return true; } }
   else
-    return test
+    { return test }
 }
 
-var Found = function Found(node, state) { this.node = node; this.state = state };
+var Found = function Found(node, state) { this.node = node; this.state = state; };
+
+// A full walk triggers the callback on each node
+function full(node, callback, base, state, override) {
+  if (!base) { base = exports.base
+  ; }(function c(node, st, override) {
+    var type = override || node.type;
+    base[type](node, st, c);
+    callback(node, st, type);
+  })(node, state, override);
+}
+
+// An fullAncestor walk is like an ancestor walk, but triggers
+// the callback on each node
+function fullAncestor(node, callback, base, state) {
+  if (!base) { base = exports.base; }
+  var ancestors = [];(function c(node, st, override) {
+    var type = override || node.type;
+    var isNew = node != ancestors[ancestors.length - 1];
+    if (isNew) { ancestors.push(node); }
+    base[type](node, st, c);
+    callback(node, st || ancestors, ancestors, type);
+    if (isNew) { ancestors.pop(); }
+  })(node, state);
+}
 
 // Find a node with a given start, end, and type (all are optional,
 // null can be used as wildcard). Returns a {node, state} object, or
 // undefined when it doesn't find a matching node.
 function findNodeAt(node, start, end, test, base, state) {
-  test = makeTest(test)
-  if (!base) base = exports.base
+  test = makeTest(test);
+  if (!base) { base = exports.base; }
   try {
     (function c(node, st, override) {
-      var type = override || node.type
+      var type = override || node.type;
       if ((start == null || node.start <= start) &&
           (end == null || node.end >= end))
-        base[type](node, st, c)
+        { base[type](node, st, c); }
       if ((start == null || node.start == start) &&
           (end == null || node.end == end) &&
           test(type, node))
-        throw new Found(node, st)
-    })(node, state)
+        { throw new Found(node, st) }
+    })(node, state);
   } catch (e) {
-    if (e instanceof Found) return e
+    if (e instanceof Found) { return e }
     throw e
   }
 }
@@ -90,253 +112,296 @@ function findNodeAt(node, start, end, test, base, state) {
 // Find the innermost node of a given type that contains the given
 // position. Interface similar to findNodeAt.
 function findNodeAround(node, pos, test, base, state) {
-  test = makeTest(test)
-  if (!base) base = exports.base
+  test = makeTest(test);
+  if (!base) { base = exports.base; }
   try {
     (function c(node, st, override) {
-      var type = override || node.type
-      if (node.start > pos || node.end < pos) return
-      base[type](node, st, c)
-      if (test(type, node)) throw new Found(node, st)
-    })(node, state)
+      var type = override || node.type;
+      if (node.start > pos || node.end < pos) { return }
+      base[type](node, st, c);
+      if (test(type, node)) { throw new Found(node, st) }
+    })(node, state);
   } catch (e) {
-    if (e instanceof Found) return e
+    if (e instanceof Found) { return e }
     throw e
   }
 }
 
 // Find the outermost matching node after a given position.
 function findNodeAfter(node, pos, test, base, state) {
-  test = makeTest(test)
-  if (!base) base = exports.base
+  test = makeTest(test);
+  if (!base) { base = exports.base; }
   try {
     (function c(node, st, override) {
-      if (node.end < pos) return
-      var type = override || node.type
-      if (node.start >= pos && test(type, node)) throw new Found(node, st)
-      base[type](node, st, c)
-    })(node, state)
+      if (node.end < pos) { return }
+      var type = override || node.type;
+      if (node.start >= pos && test(type, node)) { throw new Found(node, st) }
+      base[type](node, st, c);
+    })(node, state);
   } catch (e) {
-    if (e instanceof Found) return e
+    if (e instanceof Found) { return e }
     throw e
   }
 }
 
 // Find the outermost matching node before a given position.
 function findNodeBefore(node, pos, test, base, state) {
-  test = makeTest(test)
-  if (!base) base = exports.base
-  var max
-  ;(function c(node, st, override) {
-    if (node.start > pos) return
-    var type = override || node.type
+  test = makeTest(test);
+  if (!base) { base = exports.base; }
+  var max;(function c(node, st, override) {
+    if (node.start > pos) { return }
+    var type = override || node.type;
     if (node.end <= pos && (!max || max.node.end < node.end) && test(type, node))
-      max = new Found(node, st)
-    base[type](node, st, c)
-  })(node, state)
+      { max = new Found(node, st); }
+    base[type](node, st, c);
+  })(node, state);
   return max
 }
 
 // Fallback to an Object.create polyfill for older environments.
 var create = Object.create || function(proto) {
   function Ctor() {}
-  Ctor.prototype = proto
+  Ctor.prototype = proto;
   return new Ctor
-}
+};
 
 // Used to create a custom walker. Will fill in all missing node
 // type properties with the defaults.
 function make(funcs, base) {
-  if (!base) base = exports.base
-  var visitor = create(base)
-  for (var type in funcs) visitor[type] = funcs[type]
+  if (!base) { base = exports.base; }
+  var visitor = create(base);
+  for (var type in funcs) { visitor[type] = funcs[type]; }
   return visitor
 }
 
-function skipThrough(node, st, c) { c(node, st) }
+function skipThrough(node, st, c) { c(node, st); }
 function ignore(_node, _st, _c) {}
 
 // Node walkers.
 
-var base = {}
+var base = {};
 
 base.Program = base.BlockStatement = function (node, st, c) {
-  for (var i = 0; i < node.body.length; ++i)
-    c(node.body[i], st, "Statement")
-}
-base.Statement = skipThrough
-base.EmptyStatement = ignore
+  for (var i = 0, list = node.body; i < list.length; i += 1)
+    {
+    var stmt = list[i];
+
+    c(stmt, st, "Statement");
+  }
+};
+base.Statement = skipThrough;
+base.EmptyStatement = ignore;
 base.ExpressionStatement = base.ParenthesizedExpression =
-  function (node, st, c) { return c(node.expression, st, "Expression"); }
+  function (node, st, c) { return c(node.expression, st, "Expression"); };
 base.IfStatement = function (node, st, c) {
-  c(node.test, st, "Expression")
-  c(node.consequent, st, "Statement")
-  if (node.alternate) c(node.alternate, st, "Statement")
-}
-base.LabeledStatement = function (node, st, c) { return c(node.body, st, "Statement"); }
-base.BreakStatement = base.ContinueStatement = ignore
+  c(node.test, st, "Expression");
+  c(node.consequent, st, "Statement");
+  if (node.alternate) { c(node.alternate, st, "Statement"); }
+};
+base.LabeledStatement = function (node, st, c) { return c(node.body, st, "Statement"); };
+base.BreakStatement = base.ContinueStatement = ignore;
 base.WithStatement = function (node, st, c) {
-  c(node.object, st, "Expression")
-  c(node.body, st, "Statement")
-}
+  c(node.object, st, "Expression");
+  c(node.body, st, "Statement");
+};
 base.SwitchStatement = function (node, st, c) {
-  c(node.discriminant, st, "Expression")
-  for (var i = 0; i < node.cases.length; ++i) {
-    var cs = node.cases[i]
-    if (cs.test) c(cs.test, st, "Expression")
-    for (var j = 0; j < cs.consequent.length; ++j)
-      c(cs.consequent[j], st, "Statement")
+  c(node.discriminant, st, "Expression");
+  for (var i = 0, list = node.cases; i < list.length; i += 1) {
+    var cs = list[i];
+
+    if (cs.test) { c(cs.test, st, "Expression"); }
+    for (var i$1 = 0, list$1 = cs.consequent; i$1 < list$1.length; i$1 += 1)
+      {
+      var cons = list$1[i$1];
+
+      c(cons, st, "Statement");
+    }
   }
-}
+};
 base.ReturnStatement = base.YieldExpression = base.AwaitExpression = function (node, st, c) {
-  if (node.argument) c(node.argument, st, "Expression")
-}
+  if (node.argument) { c(node.argument, st, "Expression"); }
+};
 base.ThrowStatement = base.SpreadElement =
-  function (node, st, c) { return c(node.argument, st, "Expression"); }
+  function (node, st, c) { return c(node.argument, st, "Expression"); };
 base.TryStatement = function (node, st, c) {
-  c(node.block, st, "Statement")
-  if (node.handler) c(node.handler, st)
-  if (node.finalizer) c(node.finalizer, st, "Statement")
-}
+  c(node.block, st, "Statement");
+  if (node.handler) { c(node.handler, st); }
+  if (node.finalizer) { c(node.finalizer, st, "Statement"); }
+};
 base.CatchClause = function (node, st, c) {
-  c(node.param, st, "Pattern")
-  c(node.body, st, "ScopeBody")
-}
+  c(node.param, st, "Pattern");
+  c(node.body, st, "ScopeBody");
+};
 base.WhileStatement = base.DoWhileStatement = function (node, st, c) {
-  c(node.test, st, "Expression")
-  c(node.body, st, "Statement")
-}
+  c(node.test, st, "Expression");
+  c(node.body, st, "Statement");
+};
 base.ForStatement = function (node, st, c) {
-  if (node.init) c(node.init, st, "ForInit")
-  if (node.test) c(node.test, st, "Expression")
-  if (node.update) c(node.update, st, "Expression")
-  c(node.body, st, "Statement")
-}
+  if (node.init) { c(node.init, st, "ForInit"); }
+  if (node.test) { c(node.test, st, "Expression"); }
+  if (node.update) { c(node.update, st, "Expression"); }
+  c(node.body, st, "Statement");
+};
 base.ForInStatement = base.ForOfStatement = function (node, st, c) {
-  c(node.left, st, "ForInit")
-  c(node.right, st, "Expression")
-  c(node.body, st, "Statement")
-}
+  c(node.left, st, "ForInit");
+  c(node.right, st, "Expression");
+  c(node.body, st, "Statement");
+};
 base.ForInit = function (node, st, c) {
-  if (node.type == "VariableDeclaration") c(node, st)
-  else c(node, st, "Expression")
-}
-base.DebuggerStatement = ignore
+  if (node.type == "VariableDeclaration") { c(node, st); }
+  else { c(node, st, "Expression"); }
+};
+base.DebuggerStatement = ignore;
 
-base.FunctionDeclaration = function (node, st, c) { return c(node, st, "Function"); }
+base.FunctionDeclaration = function (node, st, c) { return c(node, st, "Function"); };
 base.VariableDeclaration = function (node, st, c) {
-  for (var i = 0; i < node.declarations.length; ++i)
-    c(node.declarations[i], st)
-}
+  for (var i = 0, list = node.declarations; i < list.length; i += 1)
+    {
+    var decl = list[i];
+
+    c(decl, st);
+  }
+};
 base.VariableDeclarator = function (node, st, c) {
-  c(node.id, st, "Pattern")
-  if (node.init) c(node.init, st, "Expression")
-}
+  c(node.id, st, "Pattern");
+  if (node.init) { c(node.init, st, "Expression"); }
+};
 
 base.Function = function (node, st, c) {
-  if (node.id) c(node.id, st, "Pattern")
-  for (var i = 0; i < node.params.length; i++)
-    c(node.params[i], st, "Pattern")
-  c(node.body, st, node.expression ? "ScopeExpression" : "ScopeBody")
-}
+  if (node.id) { c(node.id, st, "Pattern"); }
+  for (var i = 0, list = node.params; i < list.length; i += 1)
+    {
+    var param = list[i];
+
+    c(param, st, "Pattern");
+  }
+  c(node.body, st, node.expression ? "ScopeExpression" : "ScopeBody");
+};
 // FIXME drop these node types in next major version
 // (They are awkward, and in ES6 every block can be a scope.)
-base.ScopeBody = function (node, st, c) { return c(node, st, "Statement"); }
-base.ScopeExpression = function (node, st, c) { return c(node, st, "Expression"); }
+base.ScopeBody = function (node, st, c) { return c(node, st, "Statement"); };
+base.ScopeExpression = function (node, st, c) { return c(node, st, "Expression"); };
 
 base.Pattern = function (node, st, c) {
   if (node.type == "Identifier")
-    c(node, st, "VariablePattern")
+    { c(node, st, "VariablePattern"); }
   else if (node.type == "MemberExpression")
-    c(node, st, "MemberPattern")
+    { c(node, st, "MemberPattern"); }
   else
-    c(node, st)
-}
-base.VariablePattern = ignore
-base.MemberPattern = skipThrough
-base.RestElement = function (node, st, c) { return c(node.argument, st, "Pattern"); }
+    { c(node, st); }
+};
+base.VariablePattern = ignore;
+base.MemberPattern = skipThrough;
+base.RestElement = function (node, st, c) { return c(node.argument, st, "Pattern"); };
 base.ArrayPattern = function (node, st, c) {
-  for (var i = 0; i < node.elements.length; ++i) {
-    var elt = node.elements[i]
-    if (elt) c(elt, st, "Pattern")
+  for (var i = 0, list = node.elements; i < list.length; i += 1) {
+    var elt = list[i];
+
+    if (elt) { c(elt, st, "Pattern"); }
   }
-}
+};
 base.ObjectPattern = function (node, st, c) {
-  for (var i = 0; i < node.properties.length; ++i)
-    c(node.properties[i].value, st, "Pattern")
-}
+  for (var i = 0, list = node.properties; i < list.length; i += 1)
+    {
+    var prop = list[i];
+
+    c(prop.value, st, "Pattern");
+  }
+};
 
-base.Expression = skipThrough
-base.ThisExpression = base.Super = base.MetaProperty = ignore
+base.Expression = skipThrough;
+base.ThisExpression = base.Super = base.MetaProperty = ignore;
 base.ArrayExpression = function (node, st, c) {
-  for (var i = 0; i < node.elements.length; ++i) {
-    var elt = node.elements[i]
-    if (elt) c(elt, st, "Expression")
+  for (var i = 0, list = node.elements; i < list.length; i += 1) {
+    var elt = list[i];
+
+    if (elt) { c(elt, st, "Expression"); }
   }
-}
+};
 base.ObjectExpression = function (node, st, c) {
-  for (var i = 0; i < node.properties.length; ++i)
-    c(node.properties[i], st)
-}
-base.FunctionExpression = base.ArrowFunctionExpression = base.FunctionDeclaration
+  for (var i = 0, list = node.properties; i < list.length; i += 1)
+    {
+    var prop = list[i];
+
+    c(prop, st);
+  }
+};
+base.FunctionExpression = base.ArrowFunctionExpression = base.FunctionDeclaration;
 base.SequenceExpression = base.TemplateLiteral = function (node, st, c) {
-  for (var i = 0; i < node.expressions.length; ++i)
-    c(node.expressions[i], st, "Expression")
-}
+  for (var i = 0, list = node.expressions; i < list.length; i += 1)
+    {
+    var expr = list[i];
+
+    c(expr, st, "Expression");
+  }
+};
 base.UnaryExpression = base.UpdateExpression = function (node, st, c) {
-  c(node.argument, st, "Expression")
-}
+  c(node.argument, st, "Expression");
+};
 base.BinaryExpression = base.LogicalExpression = function (node, st, c) {
-  c(node.left, st, "Expression")
-  c(node.right, st, "Expression")
-}
+  c(node.left, st, "Expression");
+  c(node.right, st, "Expression");
+};
 base.AssignmentExpression = base.AssignmentPattern = function (node, st, c) {
-  c(node.left, st, "Pattern")
-  c(node.right, st, "Expression")
-}
+  c(node.left, st, "Pattern");
+  c(node.right, st, "Expression");
+};
 base.ConditionalExpression = function (node, st, c) {
-  c(node.test, st, "Expression")
-  c(node.consequent, st, "Expression")
-  c(node.alternate, st, "Expression")
-}
+  c(node.test, st, "Expression");
+  c(node.consequent, st, "Expression");
+  c(node.alternate, st, "Expression");
+};
 base.NewExpression = base.CallExpression = function (node, st, c) {
-  c(node.callee, st, "Expression")
-  if (node.arguments) for (var i = 0; i < node.arguments.length; ++i)
-    c(node.arguments[i], st, "Expression")
-}
+  c(node.callee, st, "Expression");
+  if (node.arguments)
+    { for (var i = 0, list = node.arguments; i < list.length; i += 1)
+      {
+        var arg = list[i];
+
+        c(arg, st, "Expression");
+      } }
+};
 base.MemberExpression = function (node, st, c) {
-  c(node.object, st, "Expression")
-  if (node.computed) c(node.property, st, "Expression")
-}
+  c(node.object, st, "Expression");
+  if (node.computed) { c(node.property, st, "Expression"); }
+};
 base.ExportNamedDeclaration = base.ExportDefaultDeclaration = function (node, st, c) {
   if (node.declaration)
-    c(node.declaration, st, node.type == "ExportNamedDeclaration" || node.declaration.id ? "Statement" : "Expression")
-  if (node.source) c(node.source, st, "Expression")
-}
+    { c(node.declaration, st, node.type == "ExportNamedDeclaration" || node.declaration.id ? "Statement" : "Expression"); }
+  if (node.source) { c(node.source, st, "Expression"); }
+};
 base.ExportAllDeclaration = function (node, st, c) {
-  c(node.source, st, "Expression")
-}
+  c(node.source, st, "Expression");
+};
 base.ImportDeclaration = function (node, st, c) {
-  for (var i = 0; i < node.specifiers.length; i++)
-    c(node.specifiers[i], st)
-  c(node.source, st, "Expression")
-}
-base.ImportSpecifier = base.ImportDefaultSpecifier = base.ImportNamespaceSpecifier = base.Identifier = base.Literal = ignore
+  for (var i = 0, list = node.specifiers; i < list.length; i += 1)
+    {
+    var spec = list[i];
+
+    c(spec, st);
+  }
+  c(node.source, st, "Expression");
+};
+base.ImportSpecifier = base.ImportDefaultSpecifier = base.ImportNamespaceSpecifier = base.Identifier = base.Literal = ignore;
 
 base.TaggedTemplateExpression = function (node, st, c) {
-  c(node.tag, st, "Expression")
-  c(node.quasi, st)
-}
-base.ClassDeclaration = base.ClassExpression = function (node, st, c) { return c(node, st, "Class"); }
+  c(node.tag, st, "Expression");
+  c(node.quasi, st);
+};
+base.ClassDeclaration = base.ClassExpression = function (node, st, c) { return c(node, st, "Class"); };
 base.Class = function (node, st, c) {
-  if (node.id) c(node.id, st, "Pattern")
-  if (node.superClass) c(node.superClass, st, "Expression")
-  for (var i = 0; i < node.body.body.length; i++)
-    c(node.body.body[i], st)
-}
+  if (node.id) { c(node.id, st, "Pattern"); }
+  if (node.superClass) { c(node.superClass, st, "Expression"); }
+  for (var i = 0, list = node.body.body; i < list.length; i += 1)
+    {
+    var item = list[i];
+
+    c(item, st);
+  }
+};
 base.MethodDefinition = base.Property = function (node, st, c) {
-  if (node.computed) c(node.key, st, "Expression")
-  c(node.value, st, "Expression")
-}
+  if (node.computed) { c(node.key, st, "Expression"); }
+  c(node.value, st, "Expression");
+};
 
-export { simple, ancestor, recursive, findNodeAt, findNodeAround, findNodeAfter, findNodeBefore, make, base };
-\ No newline at end of file
+export { simple, ancestor, recursive, full, fullAncestor, findNodeAt, findNodeAround, findNodeAfter, findNodeBefore, make, base };
diff --git a/node_modules/acorn/dist/walk.js b/node_modules/acorn/dist/walk.js
index 29609de04..d6aaa9a95 100644
--- a/node_modules/acorn/dist/walk.js
+++ b/node_modules/acorn/dist/walk.js
@@ -1,7 +1,7 @@
 (function (global, factory) {
-  typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports) :
-  typeof define === 'function' && define.amd ? define(['exports'], factory) :
-  (factory((global.acorn = global.acorn || {}, global.acorn.walk = global.acorn.walk || {})));
+	typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports) :
+	typeof define === 'function' && define.amd ? define(['exports'], factory) :
+	(factory((global.acorn = global.acorn || {}, global.acorn.walk = global.acorn.walk || {})));
 }(this, (function (exports) { 'use strict';
 
 // AST walker module for Mozilla Parser API compatible trees
@@ -23,28 +23,27 @@
 // state.
 
 function simple(node, visitors, base, state, override) {
-  if (!base) base = exports.base
-  ;(function c(node, st, override) {
-    var type = override || node.type, found = visitors[type]
-    base[type](node, st, c)
-    if (found) found(node, st)
-  })(node, state, override)
+  if (!base) { base = exports.base
+  ; }(function c(node, st, override) {
+    var type = override || node.type, found = visitors[type];
+    base[type](node, st, c);
+    if (found) { found(node, st); }
+  })(node, state, override);
 }
 
 // An ancestor walk keeps an array of ancestor nodes (including the
 // current node) and passes them to the callback as third parameter
 // (and also as state parameter when no other state is present).
 function ancestor(node, visitors, base, state) {
-  if (!base) base = exports.base
-  var ancestors = []
-  ;(function c(node, st, override) {
-    var type = override || node.type, found = visitors[type]
-    var isNew = node != ancestors[ancestors.length - 1]
-    if (isNew) ancestors.push(node)
-    base[type](node, st, c)
-    if (found) found(node, st || ancestors, ancestors)
-    if (isNew) ancestors.pop()
-  })(node, state)
+  if (!base) { base = exports.base; }
+  var ancestors = [];(function c(node, st, override) {
+    var type = override || node.type, found = visitors[type];
+    var isNew = node != ancestors[ancestors.length - 1];
+    if (isNew) { ancestors.push(node); }
+    base[type](node, st, c);
+    if (found) { found(node, st || ancestors, ancestors); }
+    if (isNew) { ancestors.pop(); }
+  })(node, state);
 }
 
 // A recursive walk is one where your functions override the default
@@ -53,42 +52,65 @@ function ancestor(node, visitors, base, state) {
 // their child nodes (by calling their third argument on these
 // nodes).
 function recursive(node, state, funcs, base, override) {
-  var visitor = funcs ? exports.make(funcs, base) : base
-  ;(function c(node, st, override) {
-    visitor[override || node.type](node, st, c)
-  })(node, state, override)
+  var visitor = funcs ? exports.make(funcs, base) : base;(function c(node, st, override) {
+    visitor[override || node.type](node, st, c);
+  })(node, state, override);
 }
 
 function makeTest(test) {
   if (typeof test == "string")
-    return function (type) { return type == test; }
+    { return function (type) { return type == test; } }
   else if (!test)
-    return function () { return true; }
+    { return function () { return true; } }
   else
-    return test
+    { return test }
 }
 
-var Found = function Found(node, state) { this.node = node; this.state = state };
+var Found = function Found(node, state) { this.node = node; this.state = state; };
+
+// A full walk triggers the callback on each node
+function full(node, callback, base, state, override) {
+  if (!base) { base = exports.base
+  ; }(function c(node, st, override) {
+    var type = override || node.type;
+    base[type](node, st, c);
+    callback(node, st, type);
+  })(node, state, override);
+}
+
+// An fullAncestor walk is like an ancestor walk, but triggers
+// the callback on each node
+function fullAncestor(node, callback, base, state) {
+  if (!base) { base = exports.base; }
+  var ancestors = [];(function c(node, st, override) {
+    var type = override || node.type;
+    var isNew = node != ancestors[ancestors.length - 1];
+    if (isNew) { ancestors.push(node); }
+    base[type](node, st, c);
+    callback(node, st || ancestors, ancestors, type);
+    if (isNew) { ancestors.pop(); }
+  })(node, state);
+}
 
 // Find a node with a given start, end, and type (all are optional,
 // null can be used as wildcard). Returns a {node, state} object, or
 // undefined when it doesn't find a matching node.
 function findNodeAt(node, start, end, test, base, state) {
-  test = makeTest(test)
-  if (!base) base = exports.base
+  test = makeTest(test);
+  if (!base) { base = exports.base; }
   try {
     (function c(node, st, override) {
-      var type = override || node.type
+      var type = override || node.type;
       if ((start == null || node.start <= start) &&
           (end == null || node.end >= end))
-        base[type](node, st, c)
+        { base[type](node, st, c); }
       if ((start == null || node.start == start) &&
           (end == null || node.end == end) &&
           test(type, node))
-        throw new Found(node, st)
-    })(node, state)
+        { throw new Found(node, st) }
+    })(node, state);
   } catch (e) {
-    if (e instanceof Found) return e
+    if (e instanceof Found) { return e }
     throw e
   }
 }
@@ -96,258 +118,303 @@ function findNodeAt(node, start, end, test, base, state) {
 // Find the innermost node of a given type that contains the given
 // position. Interface similar to findNodeAt.
 function findNodeAround(node, pos, test, base, state) {
-  test = makeTest(test)
-  if (!base) base = exports.base
+  test = makeTest(test);
+  if (!base) { base = exports.base; }
   try {
     (function c(node, st, override) {
-      var type = override || node.type
-      if (node.start > pos || node.end < pos) return
-      base[type](node, st, c)
-      if (test(type, node)) throw new Found(node, st)
-    })(node, state)
+      var type = override || node.type;
+      if (node.start > pos || node.end < pos) { return }
+      base[type](node, st, c);
+      if (test(type, node)) { throw new Found(node, st) }
+    })(node, state);
   } catch (e) {
-    if (e instanceof Found) return e
+    if (e instanceof Found) { return e }
     throw e
   }
 }
 
 // Find the outermost matching node after a given position.
 function findNodeAfter(node, pos, test, base, state) {
-  test = makeTest(test)
-  if (!base) base = exports.base
+  test = makeTest(test);
+  if (!base) { base = exports.base; }
   try {
     (function c(node, st, override) {
-      if (node.end < pos) return
-      var type = override || node.type
-      if (node.start >= pos && test(type, node)) throw new Found(node, st)
-      base[type](node, st, c)
-    })(node, state)
+      if (node.end < pos) { return }
+      var type = override || node.type;
+      if (node.start >= pos && test(type, node)) { throw new Found(node, st) }
+      base[type](node, st, c);
+    })(node, state);
   } catch (e) {
-    if (e instanceof Found) return e
+    if (e instanceof Found) { return e }
     throw e
   }
 }
 
 // Find the outermost matching node before a given position.
 function findNodeBefore(node, pos, test, base, state) {
-  test = makeTest(test)
-  if (!base) base = exports.base
-  var max
-  ;(function c(node, st, override) {
-    if (node.start > pos) return
-    var type = override || node.type
+  test = makeTest(test);
+  if (!base) { base = exports.base; }
+  var max;(function c(node, st, override) {
+    if (node.start > pos) { return }
+    var type = override || node.type;
     if (node.end <= pos && (!max || max.node.end < node.end) && test(type, node))
-      max = new Found(node, st)
-    base[type](node, st, c)
-  })(node, state)
+      { max = new Found(node, st); }
+    base[type](node, st, c);
+  })(node, state);
   return max
 }
 
 // Fallback to an Object.create polyfill for older environments.
 var create = Object.create || function(proto) {
   function Ctor() {}
-  Ctor.prototype = proto
+  Ctor.prototype = proto;
   return new Ctor
-}
+};
 
 // Used to create a custom walker. Will fill in all missing node
 // type properties with the defaults.
 function make(funcs, base) {
-  if (!base) base = exports.base
-  var visitor = create(base)
-  for (var type in funcs) visitor[type] = funcs[type]
+  if (!base) { base = exports.base; }
+  var visitor = create(base);
+  for (var type in funcs) { visitor[type] = funcs[type]; }
   return visitor
 }
 
-function skipThrough(node, st, c) { c(node, st) }
+function skipThrough(node, st, c) { c(node, st); }
 function ignore(_node, _st, _c) {}
 
 // Node walkers.
 
-var base = {}
+var base = {};
 
 base.Program = base.BlockStatement = function (node, st, c) {
-  for (var i = 0; i < node.body.length; ++i)
-    c(node.body[i], st, "Statement")
-}
-base.Statement = skipThrough
-base.EmptyStatement = ignore
+  for (var i = 0, list = node.body; i < list.length; i += 1)
+    {
+    var stmt = list[i];
+
+    c(stmt, st, "Statement");
+  }
+};
+base.Statement = skipThrough;
+base.EmptyStatement = ignore;
 base.ExpressionStatement = base.ParenthesizedExpression =
-  function (node, st, c) { return c(node.expression, st, "Expression"); }
+  function (node, st, c) { return c(node.expression, st, "Expression"); };
 base.IfStatement = function (node, st, c) {
-  c(node.test, st, "Expression")
-  c(node.consequent, st, "Statement")
-  if (node.alternate) c(node.alternate, st, "Statement")
-}
-base.LabeledStatement = function (node, st, c) { return c(node.body, st, "Statement"); }
-base.BreakStatement = base.ContinueStatement = ignore
+  c(node.test, st, "Expression");
+  c(node.consequent, st, "Statement");
+  if (node.alternate) { c(node.alternate, st, "Statement"); }
+};
+base.LabeledStatement = function (node, st, c) { return c(node.body, st, "Statement"); };
+base.BreakStatement = base.ContinueStatement = ignore;
 base.WithStatement = function (node, st, c) {
-  c(node.object, st, "Expression")
-  c(node.body, st, "Statement")
-}
+  c(node.object, st, "Expression");
+  c(node.body, st, "Statement");
+};
 base.SwitchStatement = function (node, st, c) {
-  c(node.discriminant, st, "Expression")
-  for (var i = 0; i < node.cases.length; ++i) {
-    var cs = node.cases[i]
-    if (cs.test) c(cs.test, st, "Expression")
-    for (var j = 0; j < cs.consequent.length; ++j)
-      c(cs.consequent[j], st, "Statement")
+  c(node.discriminant, st, "Expression");
+  for (var i = 0, list = node.cases; i < list.length; i += 1) {
+    var cs = list[i];
+
+    if (cs.test) { c(cs.test, st, "Expression"); }
+    for (var i$1 = 0, list$1 = cs.consequent; i$1 < list$1.length; i$1 += 1)
+      {
+      var cons = list$1[i$1];
+
+      c(cons, st, "Statement");
+    }
   }
-}
+};
 base.ReturnStatement = base.YieldExpression = base.AwaitExpression = function (node, st, c) {
-  if (node.argument) c(node.argument, st, "Expression")
-}
+  if (node.argument) { c(node.argument, st, "Expression"); }
+};
 base.ThrowStatement = base.SpreadElement =
-  function (node, st, c) { return c(node.argument, st, "Expression"); }
+  function (node, st, c) { return c(node.argument, st, "Expression"); };
 base.TryStatement = function (node, st, c) {
-  c(node.block, st, "Statement")
-  if (node.handler) c(node.handler, st)
-  if (node.finalizer) c(node.finalizer, st, "Statement")
-}
+  c(node.block, st, "Statement");
+  if (node.handler) { c(node.handler, st); }
+  if (node.finalizer) { c(node.finalizer, st, "Statement"); }
+};
 base.CatchClause = function (node, st, c) {
-  c(node.param, st, "Pattern")
-  c(node.body, st, "ScopeBody")
-}
+  c(node.param, st, "Pattern");
+  c(node.body, st, "ScopeBody");
+};
 base.WhileStatement = base.DoWhileStatement = function (node, st, c) {
-  c(node.test, st, "Expression")
-  c(node.body, st, "Statement")
-}
+  c(node.test, st, "Expression");
+  c(node.body, st, "Statement");
+};
 base.ForStatement = function (node, st, c) {
-  if (node.init) c(node.init, st, "ForInit")
-  if (node.test) c(node.test, st, "Expression")
-  if (node.update) c(node.update, st, "Expression")
-  c(node.body, st, "Statement")
-}
+  if (node.init) { c(node.init, st, "ForInit"); }
+  if (node.test) { c(node.test, st, "Expression"); }
+  if (node.update) { c(node.update, st, "Expression"); }
+  c(node.body, st, "Statement");
+};
 base.ForInStatement = base.ForOfStatement = function (node, st, c) {
-  c(node.left, st, "ForInit")
-  c(node.right, st, "Expression")
-  c(node.body, st, "Statement")
-}
+  c(node.left, st, "ForInit");
+  c(node.right, st, "Expression");
+  c(node.body, st, "Statement");
+};
 base.ForInit = function (node, st, c) {
-  if (node.type == "VariableDeclaration") c(node, st)
-  else c(node, st, "Expression")
-}
-base.DebuggerStatement = ignore
+  if (node.type == "VariableDeclaration") { c(node, st); }
+  else { c(node, st, "Expression"); }
+};
+base.DebuggerStatement = ignore;
 
-base.FunctionDeclaration = function (node, st, c) { return c(node, st, "Function"); }
+base.FunctionDeclaration = function (node, st, c) { return c(node, st, "Function"); };
 base.VariableDeclaration = function (node, st, c) {
-  for (var i = 0; i < node.declarations.length; ++i)
-    c(node.declarations[i], st)
-}
+  for (var i = 0, list = node.declarations; i < list.length; i += 1)
+    {
+    var decl = list[i];
+
+    c(decl, st);
+  }
+};
 base.VariableDeclarator = function (node, st, c) {
-  c(node.id, st, "Pattern")
-  if (node.init) c(node.init, st, "Expression")
-}
+  c(node.id, st, "Pattern");
+  if (node.init) { c(node.init, st, "Expression"); }
+};
 
 base.Function = function (node, st, c) {
-  if (node.id) c(node.id, st, "Pattern")
-  for (var i = 0; i < node.params.length; i++)
-    c(node.params[i], st, "Pattern")
-  c(node.body, st, node.expression ? "ScopeExpression" : "ScopeBody")
-}
+  if (node.id) { c(node.id, st, "Pattern"); }
+  for (var i = 0, list = node.params; i < list.length; i += 1)
+    {
+    var param = list[i];
+
+    c(param, st, "Pattern");
+  }
+  c(node.body, st, node.expression ? "ScopeExpression" : "ScopeBody");
+};
 // FIXME drop these node types in next major version
 // (They are awkward, and in ES6 every block can be a scope.)
-base.ScopeBody = function (node, st, c) { return c(node, st, "Statement"); }
-base.ScopeExpression = function (node, st, c) { return c(node, st, "Expression"); }
+base.ScopeBody = function (node, st, c) { return c(node, st, "Statement"); };
+base.ScopeExpression = function (node, st, c) { return c(node, st, "Expression"); };
 
 base.Pattern = function (node, st, c) {
   if (node.type == "Identifier")
-    c(node, st, "VariablePattern")
+    { c(node, st, "VariablePattern"); }
   else if (node.type == "MemberExpression")
-    c(node, st, "MemberPattern")
+    { c(node, st, "MemberPattern"); }
   else
-    c(node, st)
-}
-base.VariablePattern = ignore
-base.MemberPattern = skipThrough
-base.RestElement = function (node, st, c) { return c(node.argument, st, "Pattern"); }
+    { c(node, st); }
+};
+base.VariablePattern = ignore;
+base.MemberPattern = skipThrough;
+base.RestElement = function (node, st, c) { return c(node.argument, st, "Pattern"); };
 base.ArrayPattern = function (node, st, c) {
-  for (var i = 0; i < node.elements.length; ++i) {
-    var elt = node.elements[i]
-    if (elt) c(elt, st, "Pattern")
+  for (var i = 0, list = node.elements; i < list.length; i += 1) {
+    var elt = list[i];
+
+    if (elt) { c(elt, st, "Pattern"); }
   }
-}
+};
 base.ObjectPattern = function (node, st, c) {
-  for (var i = 0; i < node.properties.length; ++i)
-    c(node.properties[i].value, st, "Pattern")
-}
+  for (var i = 0, list = node.properties; i < list.length; i += 1)
+    {
+    var prop = list[i];
+
+    c(prop.value, st, "Pattern");
+  }
+};
 
-base.Expression = skipThrough
-base.ThisExpression = base.Super = base.MetaProperty = ignore
+base.Expression = skipThrough;
+base.ThisExpression = base.Super = base.MetaProperty = ignore;
 base.ArrayExpression = function (node, st, c) {
-  for (var i = 0; i < node.elements.length; ++i) {
-    var elt = node.elements[i]
-    if (elt) c(elt, st, "Expression")
+  for (var i = 0, list = node.elements; i < list.length; i += 1) {
+    var elt = list[i];
+
+    if (elt) { c(elt, st, "Expression"); }
   }
-}
+};
 base.ObjectExpression = function (node, st, c) {
-  for (var i = 0; i < node.properties.length; ++i)
-    c(node.properties[i], st)
-}
-base.FunctionExpression = base.ArrowFunctionExpression = base.FunctionDeclaration
+  for (var i = 0, list = node.properties; i < list.length; i += 1)
+    {
+    var prop = list[i];
+
+    c(prop, st);
+  }
+};
+base.FunctionExpression = base.ArrowFunctionExpression = base.FunctionDeclaration;
 base.SequenceExpression = base.TemplateLiteral = function (node, st, c) {
-  for (var i = 0; i < node.expressions.length; ++i)
-    c(node.expressions[i], st, "Expression")
-}
+  for (var i = 0, list = node.expressions; i < list.length; i += 1)
+    {
+    var expr = list[i];
+
+    c(expr, st, "Expression");
+  }
+};
 base.UnaryExpression = base.UpdateExpression = function (node, st, c) {
-  c(node.argument, st, "Expression")
-}
+  c(node.argument, st, "Expression");
+};
 base.BinaryExpression = base.LogicalExpression = function (node, st, c) {
-  c(node.left, st, "Expression")
-  c(node.right, st, "Expression")
-}
+  c(node.left, st, "Expression");
+  c(node.right, st, "Expression");
+};
 base.AssignmentExpression = base.AssignmentPattern = function (node, st, c) {
-  c(node.left, st, "Pattern")
-  c(node.right, st, "Expression")
-}
+  c(node.left, st, "Pattern");
+  c(node.right, st, "Expression");
+};
 base.ConditionalExpression = function (node, st, c) {
-  c(node.test, st, "Expression")
-  c(node.consequent, st, "Expression")
-  c(node.alternate, st, "Expression")
-}
+  c(node.test, st, "Expression");
+  c(node.consequent, st, "Expression");
+  c(node.alternate, st, "Expression");
+};
 base.NewExpression = base.CallExpression = function (node, st, c) {
-  c(node.callee, st, "Expression")
-  if (node.arguments) for (var i = 0; i < node.arguments.length; ++i)
-    c(node.arguments[i], st, "Expression")
-}
+  c(node.callee, st, "Expression");
+  if (node.arguments)
+    { for (var i = 0, list = node.arguments; i < list.length; i += 1)
+      {
+        var arg = list[i];
+
+        c(arg, st, "Expression");
+      } }
+};
 base.MemberExpression = function (node, st, c) {
-  c(node.object, st, "Expression")
-  if (node.computed) c(node.property, st, "Expression")
-}
+  c(node.object, st, "Expression");
+  if (node.computed) { c(node.property, st, "Expression"); }
+};
 base.ExportNamedDeclaration = base.ExportDefaultDeclaration = function (node, st, c) {
   if (node.declaration)
-    c(node.declaration, st, node.type == "ExportNamedDeclaration" || node.declaration.id ? "Statement" : "Expression")
-  if (node.source) c(node.source, st, "Expression")
-}
+    { c(node.declaration, st, node.type == "ExportNamedDeclaration" || node.declaration.id ? "Statement" : "Expression"); }
+  if (node.source) { c(node.source, st, "Expression"); }
+};
 base.ExportAllDeclaration = function (node, st, c) {
-  c(node.source, st, "Expression")
-}
+  c(node.source, st, "Expression");
+};
 base.ImportDeclaration = function (node, st, c) {
-  for (var i = 0; i < node.specifiers.length; i++)
-    c(node.specifiers[i], st)
-  c(node.source, st, "Expression")
-}
-base.ImportSpecifier = base.ImportDefaultSpecifier = base.ImportNamespaceSpecifier = base.Identifier = base.Literal = ignore
+  for (var i = 0, list = node.specifiers; i < list.length; i += 1)
+    {
+    var spec = list[i];
+
+    c(spec, st);
+  }
+  c(node.source, st, "Expression");
+};
+base.ImportSpecifier = base.ImportDefaultSpecifier = base.ImportNamespaceSpecifier = base.Identifier = base.Literal = ignore;
 
 base.TaggedTemplateExpression = function (node, st, c) {
-  c(node.tag, st, "Expression")
-  c(node.quasi, st)
-}
-base.ClassDeclaration = base.ClassExpression = function (node, st, c) { return c(node, st, "Class"); }
+  c(node.tag, st, "Expression");
+  c(node.quasi, st);
+};
+base.ClassDeclaration = base.ClassExpression = function (node, st, c) { return c(node, st, "Class"); };
 base.Class = function (node, st, c) {
-  if (node.id) c(node.id, st, "Pattern")
-  if (node.superClass) c(node.superClass, st, "Expression")
-  for (var i = 0; i < node.body.body.length; i++)
-    c(node.body.body[i], st)
-}
+  if (node.id) { c(node.id, st, "Pattern"); }
+  if (node.superClass) { c(node.superClass, st, "Expression"); }
+  for (var i = 0, list = node.body.body; i < list.length; i += 1)
+    {
+    var item = list[i];
+
+    c(item, st);
+  }
+};
 base.MethodDefinition = base.Property = function (node, st, c) {
-  if (node.computed) c(node.key, st, "Expression")
-  c(node.value, st, "Expression")
-}
+  if (node.computed) { c(node.key, st, "Expression"); }
+  c(node.value, st, "Expression");
+};
 
 exports.simple = simple;
 exports.ancestor = ancestor;
 exports.recursive = recursive;
+exports.full = full;
+exports.fullAncestor = fullAncestor;
 exports.findNodeAt = findNodeAt;
 exports.findNodeAround = findNodeAround;
 exports.findNodeAfter = findNodeAfter;
@@ -357,4 +424,4 @@ exports.base = base;
 
 Object.defineProperty(exports, '__esModule', { value: true });
 
-})));
-\ No newline at end of file
+})));
diff --git a/node_modules/acorn/package.json b/node_modules/acorn/package.json
index a18edb25f..3d242e741 100644
--- a/node_modules/acorn/package.json
+++ b/node_modules/acorn/package.json
@@ -3,8 +3,8 @@
   "description": "ECMAScript parser",
   "homepage": "https://github.com/ternjs/acorn",
   "main": "dist/acorn.js",
-  "jsnext:main": "dist/acorn.es.js",
-  "version": "5.0.3",
+  "module": "dist/acorn.es.js",
+  "version": "5.1.1",
   "engines": {
     "node": ">=0.4.0"
   },
@@ -26,13 +26,13 @@
   },
   "license": "MIT",
   "scripts": {
-    "prepublish": "npm test",
+    "prepare": "npm test",
     "test": "node test/run.js && node test/lint.js",
-    "pretest": "npm run build",
+    "pretest": "npm run build:main && npm run build:loose",
     "build": "npm run build:main && npm run build:walk && npm run build:loose && npm run build:bin",
     "build:main": "rollup -c rollup/config.main.js",
     "build:walk": "rollup -c rollup/config.walk.js",
-    "build:loose": "rollup -c rollup/config.loose.js",
+    "build:loose": "rollup -c rollup/config.loose.js && rollup -c rollup/config.loose_es.js",
     "build:bin": "rollup -c rollup/config.bin.js",
     "lint": "eslint src/"
   },
@@ -45,8 +45,8 @@
     "eslint-plugin-import": "^2.2.0",
     "eslint-plugin-promise": "^3.5.0",
     "eslint-plugin-standard": "^2.1.1",
-    "rollup": "^0.34.1",
-    "rollup-plugin-buble": "^0.11.0",
+    "rollup": "^0.43.0",
+    "rollup-plugin-buble": "^0.15.0",
     "unicode-9.0.0": "^0.7.0"
   }
 }
diff --git a/node_modules/acorn/src/.eslintrc b/node_modules/acorn/src/.eslintrc
deleted file mode 100644
index 5549678a7..000000000
--- a/node_modules/acorn/src/.eslintrc
+++ /dev/null
@@ -1,33 +0,0 @@
-{
-    "extends": [
-        "eslint:recommended",
-        "standard",
-        "plugin:import/errors",
-        "plugin:import/warnings"
-    ],
-    "rules": {
-        "curly": "off",
-        "eqeqeq": "off",
-        "indent": ["error", 2, { "SwitchCase": 0, "VariableDeclarator": 2 }],
-        "new-parens": "off",
-        "no-case-declarations": "off",
-        "no-cond-assign": "off",
-        "no-fallthrough": "off",
-        "no-labels": "off",
-        "no-mixed-operators": "off",
-        "no-return-assign": "off",
-        "no-unused-labels": "error",
-        "no-var": "error",
-        "object-curly-spacing": ["error", "never"],
-        "one-var": "off",
-        "quotes": ["error", "double"],
-        "semi-spacing": "off",
-        "space-before-function-paren": ["error", "never"]
-    },
-    "globals": {
-        "Packages": false
-    },
-    "plugins": [
-        "import"
-    ]
-}
-\ No newline at end of file
diff --git a/node_modules/acorn/src/bin/.eslintrc b/node_modules/acorn/src/bin/.eslintrc
deleted file mode 100644
index 2598b25f5..000000000
--- a/node_modules/acorn/src/bin/.eslintrc
+++ /dev/null
@@ -1,6 +0,0 @@
-{
-    "extends": "../.eslintrc",
-    "rules": {
-        "no-console": "off"
-    }
-}
-\ No newline at end of file
diff --git a/node_modules/acorn/src/bin/acorn.js b/node_modules/acorn/src/bin/acorn.js
deleted file mode 100644
index b9ee5ee9d..000000000
--- a/node_modules/acorn/src/bin/acorn.js
+++ /dev/null
@@ -1,62 +0,0 @@
-import {basename} from "path"
-import {readFileSync as readFile} from "fs"
-import * as acorn from "acorn"
-
-let infile, forceFile, silent = false, compact = false, tokenize = false
-const options = {}
-
-function help(status) {
-  const print = (status == 0) ? console.log : console.error
-  print("usage: " + basename(process.argv[1]) + " [--ecma3|--ecma5|--ecma6|--ecma7|...|--ecma2015|--ecma2016|...]")
-  print("        [--tokenize] [--locations] [---allow-hash-bang] [--compact] [--silent] [--module] [--help] [--] [infile]")
-  process.exit(status)
-}
-
-for (let i = 2; i < process.argv.length; ++i) {
-  const arg = process.argv[i]
-  if ((arg == "-" || arg[0] != "-") && !infile) infile = arg
-  else if (arg == "--" && !infile && i + 2 == process.argv.length) forceFile = infile = process.argv[++i]
-  else if (arg == "--locations") options.locations = true
-  else if (arg == "--allow-hash-bang") options.allowHashBang = true
-  else if (arg == "--silent") silent = true
-  else if (arg == "--compact") compact = true
-  else if (arg == "--help") help(0)
-  else if (arg == "--tokenize") tokenize = true
-  else if (arg == "--module") options.sourceType = "module"
-  else {
-    let match = arg.match(/^--ecma(\d+)$/)
-    if (match)
-      options.ecmaVersion = +match[1]
-    else
-      help(1)
-  }
-}
-
-function run(code) {
-  let result
-  try {
-    if (!tokenize) {
-      result = acorn.parse(code, options)
-    } else {
-      result = []
-      let tokenizer = acorn.tokenizer(code, options), token
-      do {
-        token = tokenizer.getToken()
-        result.push(token)
-      } while (token.type != acorn.tokTypes.eof)
-    }
-  } catch (e) {
-    console.error(e.message)
-    process.exit(1)
-  }
-  if (!silent) console.log(JSON.stringify(result, null, compact ? null : 2))
-}
-
-if (forceFile || infile && infile != "-") {
-  run(readFile(infile, "utf8"))
-} else {
-  let code = ""
-  process.stdin.resume()
-  process.stdin.on("data", chunk => code += chunk)
-  process.stdin.on("end", () => run(code))
-}
diff --git a/node_modules/acorn/src/expression.js b/node_modules/acorn/src/expression.js
deleted file mode 100644
index 47790d2dc..000000000
--- a/node_modules/acorn/src/expression.js
+++ /dev/null
@@ -1,830 +0,0 @@
-// A recursive descent parser operates by defining functions for all
-// syntactic elements, and recursively calling those, each function
-// advancing the input stream and returning an AST node. Precedence
-// of constructs (for example, the fact that `!x[1]` means `!(x[1])`
-// instead of `(!x)[1]` is handled by the fact that the parser
-// function that parses unary prefix operators is called first, and
-// in turn calls the function that parses `[]` subscripts — that
-// way, it'll receive the node for `x[1]` already parsed, and wraps
-// *that* in the unary operator node.
-//
-// Acorn uses an [operator precedence parser][opp] to handle binary
-// operator precedence, because it is much more compact than using
-// the technique outlined above, which uses different, nesting
-// functions to specify precedence, for all of the ten binary
-// precedence levels that JavaScript defines.
-//
-// [opp]: http://en.wikipedia.org/wiki/Operator-precedence_parser
-
-import {types as tt} from "./tokentype"
-import {Parser} from "./state"
-import {DestructuringErrors} from "./parseutil"
-
-const pp = Parser.prototype
-
-// Check if property name clashes with already added.
-// Object/class getters and setters are not allowed to clash —
-// either with each other or with an init property — and in
-// strict mode, init properties are also not allowed to be repeated.
-
-pp.checkPropClash = function(prop, propHash) {
-  if (this.options.ecmaVersion >= 6 && (prop.computed || prop.method || prop.shorthand))
-    return
-  let {key} = prop, name
-  switch (key.type) {
-  case "Identifier": name = key.name; break
-  case "Literal": name = String(key.value); break
-  default: return
-  }
-  let {kind} = prop
-  if (this.options.ecmaVersion >= 6) {
-    if (name === "__proto__" && kind === "init") {
-      if (propHash.proto) this.raiseRecoverable(key.start, "Redefinition of __proto__ property")
-      propHash.proto = true
-    }
-    return
-  }
-  name = "$" + name
-  let other = propHash[name]
-  if (other) {
-    let redefinition
-    if (kind === "init") {
-      redefinition = this.strict && other.init || other.get || other.set
-    } else {
-      redefinition = other.init || other[kind]
-    }
-    if (redefinition)
-      this.raiseRecoverable(key.start, "Redefinition of property")
-  } else {
-    other = propHash[name] = {
-      init: false,
-      get: false,
-      set: false
-    }
-  }
-  other[kind] = true
-}
-
-// ### Expression parsing
-
-// These nest, from the most general expression type at the top to
-// 'atomic', nondivisible expression types at the bottom. Most of
-// the functions will simply let the function(s) below them parse,
-// and, *if* the syntactic construct they handle is present, wrap
-// the AST node that the inner parser gave them in another node.
-
-// Parse a full expression. The optional arguments are used to
-// forbid the `in` operator (in for loops initalization expressions)
-// and provide reference for storing '=' operator inside shorthand
-// property assignment in contexts where both object expression
-// and object pattern might appear (so it's possible to raise
-// delayed syntax error at correct position).
-
-pp.parseExpression = function(noIn, refDestructuringErrors) {
-  let startPos = this.start, startLoc = this.startLoc
-  let expr = this.parseMaybeAssign(noIn, refDestructuringErrors)
-  if (this.type === tt.comma) {
-    let node = this.startNodeAt(startPos, startLoc)
-    node.expressions = [expr]
-    while (this.eat(tt.comma)) node.expressions.push(this.parseMaybeAssign(noIn, refDestructuringErrors))
-    return this.finishNode(node, "SequenceExpression")
-  }
-  return expr
-}
-
-// Parse an assignment expression. This includes applications of
-// operators like `+=`.
-
-pp.parseMaybeAssign = function(noIn, refDestructuringErrors, afterLeftParse) {
-  if (this.inGenerator && this.isContextual("yield")) return this.parseYield()
-
-  let ownDestructuringErrors = false, oldParenAssign = -1, oldTrailingComma = -1
-  if (refDestructuringErrors) {
-    oldParenAssign = refDestructuringErrors.parenthesizedAssign
-    oldTrailingComma = refDestructuringErrors.trailingComma
-    refDestructuringErrors.parenthesizedAssign = refDestructuringErrors.trailingComma = -1
-  } else {
-    refDestructuringErrors = new DestructuringErrors
-    ownDestructuringErrors = true
-  }
-
-  let startPos = this.start, startLoc = this.startLoc
-  if (this.type == tt.parenL || this.type == tt.name)
-    this.potentialArrowAt = this.start
-  let left = this.parseMaybeConditional(noIn, refDestructuringErrors)
-  if (afterLeftParse) left = afterLeftParse.call(this, left, startPos, startLoc)
-  if (this.type.isAssign) {
-    this.checkPatternErrors(refDestructuringErrors, true)
-    if (!ownDestructuringErrors) DestructuringErrors.call(refDestructuringErrors)
-    let node = this.startNodeAt(startPos, startLoc)
-    node.operator = this.value
-    node.left = this.type === tt.eq ? this.toAssignable(left) : left
-    refDestructuringErrors.shorthandAssign = -1 // reset because shorthand default was used correctly
-    this.checkLVal(left)
-    this.next()
-    node.right = this.parseMaybeAssign(noIn)
-    return this.finishNode(node, "AssignmentExpression")
-  } else {
-    if (ownDestructuringErrors) this.checkExpressionErrors(refDestructuringErrors, true)
-  }
-  if (oldParenAssign > -1) refDestructuringErrors.parenthesizedAssign = oldParenAssign
-  if (oldTrailingComma > -1) refDestructuringErrors.trailingComma = oldTrailingComma
-  return left
-}
-
-// Parse a ternary conditional (`?:`) operator.
-
-pp.parseMaybeConditional = function(noIn, refDestructuringErrors) {
-  let startPos = this.start, startLoc = this.startLoc
-  let expr = this.parseExprOps(noIn, refDestructuringErrors)
-  if (this.checkExpressionErrors(refDestructuringErrors)) return expr
-  if (this.eat(tt.question)) {
-    let node = this.startNodeAt(startPos, startLoc)
-    node.test = expr
-    node.consequent = this.parseMaybeAssign()
-    this.expect(tt.colon)
-    node.alternate = this.parseMaybeAssign(noIn)
-    return this.finishNode(node, "ConditionalExpression")
-  }
-  return expr
-}
-
-// Start the precedence parser.
-
-pp.parseExprOps = function(noIn, refDestructuringErrors) {
-  let startPos = this.start, startLoc = this.startLoc
-  let expr = this.parseMaybeUnary(refDestructuringErrors, false)
-  if (this.checkExpressionErrors(refDestructuringErrors)) return expr
-  return expr.start == startPos && expr.type === "ArrowFunctionExpression" ? expr : this.parseExprOp(expr, startPos, startLoc, -1, noIn)
-}
-
-// Parse binary operators with the operator precedence parsing
-// algorithm. `left` is the left-hand side of the operator.
-// `minPrec` provides context that allows the function to stop and
-// defer further parser to one of its callers when it encounters an
-// operator that has a lower precedence than the set it is parsing.
-
-pp.parseExprOp = function(left, leftStartPos, leftStartLoc, minPrec, noIn) {
-  let prec = this.type.binop
-  if (prec != null && (!noIn || this.type !== tt._in)) {
-    if (prec > minPrec) {
-      let logical = this.type === tt.logicalOR || this.type === tt.logicalAND
-      let op = this.value
-      this.next()
-      let startPos = this.start, startLoc = this.startLoc
-      let right = this.parseExprOp(this.parseMaybeUnary(null, false), startPos, startLoc, prec, noIn)
-      let node = this.buildBinary(leftStartPos, leftStartLoc, left, right, op, logical)
-      return this.parseExprOp(node, leftStartPos, leftStartLoc, minPrec, noIn)
-    }
-  }
-  return left
-}
-
-pp.buildBinary = function(startPos, startLoc, left, right, op, logical) {
-  let node = this.startNodeAt(startPos, startLoc)
-  node.left = left
-  node.operator = op
-  node.right = right
-  return this.finishNode(node, logical ? "LogicalExpression" : "BinaryExpression")
-}
-
-// Parse unary operators, both prefix and postfix.
-
-pp.parseMaybeUnary = function(refDestructuringErrors, sawUnary) {
-  let startPos = this.start, startLoc = this.startLoc, expr
-  if (this.inAsync && this.isContextual("await")) {
-    expr = this.parseAwait(refDestructuringErrors)
-    sawUnary = true
-  } else if (this.type.prefix) {
-    let node = this.startNode(), update = this.type === tt.incDec
-    node.operator = this.value
-    node.prefix = true
-    this.next()
-    node.argument = this.parseMaybeUnary(null, true)
-    this.checkExpressionErrors(refDestructuringErrors, true)
-    if (update) this.checkLVal(node.argument)
-    else if (this.strict && node.operator === "delete" &&
-             node.argument.type === "Identifier")
-      this.raiseRecoverable(node.start, "Deleting local variable in strict mode")
-    else sawUnary = true
-    expr = this.finishNode(node, update ? "UpdateExpression" : "UnaryExpression")
-  } else {
-    expr = this.parseExprSubscripts(refDestructuringErrors)
-    if (this.checkExpressionErrors(refDestructuringErrors)) return expr
-    while (this.type.postfix && !this.canInsertSemicolon()) {
-      let node = this.startNodeAt(startPos, startLoc)
-      node.operator = this.value
-      node.prefix = false
-      node.argument = expr
-      this.checkLVal(expr)
-      this.next()
-      expr = this.finishNode(node, "UpdateExpression")
-    }
-  }
-
-  if (!sawUnary && this.eat(tt.starstar))
-    return this.buildBinary(startPos, startLoc, expr, this.parseMaybeUnary(null, false), "**", false)
-  else
-    return expr
-}
-
-// Parse call, dot, and `[]`-subscript expressions.
-
-pp.parseExprSubscripts = function(refDestructuringErrors) {
-  let startPos = this.start, startLoc = this.startLoc
-  let expr = this.parseExprAtom(refDestructuringErrors)
-  let skipArrowSubscripts = expr.type === "ArrowFunctionExpression" && this.input.slice(this.lastTokStart, this.lastTokEnd) !== ")"
-  if (this.checkExpressionErrors(refDestructuringErrors) || skipArrowSubscripts) return expr
-  let result = this.parseSubscripts(expr, startPos, startLoc)
-  if (refDestructuringErrors && result.type === "MemberExpression") {
-    if (refDestructuringErrors.parenthesizedAssign >= result.start) refDestructuringErrors.parenthesizedAssign = -1
-    if (refDestructuringErrors.parenthesizedBind >= result.start) refDestructuringErrors.parenthesizedBind = -1
-  }
-  return result
-}
-
-pp.parseSubscripts = function(base, startPos, startLoc, noCalls) {
-  let maybeAsyncArrow = this.options.ecmaVersion >= 8 && base.type === "Identifier" && base.name === "async" &&
-      this.lastTokEnd == base.end && !this.canInsertSemicolon()
-  for (let computed;;) {
-    if ((computed = this.eat(tt.bracketL)) || this.eat(tt.dot)) {
-      let node = this.startNodeAt(startPos, startLoc)
-      node.object = base
-      node.property = computed ? this.parseExpression() : this.parseIdent(true)
-      node.computed = !!computed
-      if (computed) this.expect(tt.bracketR)
-      base = this.finishNode(node, "MemberExpression")
-    } else if (!noCalls && this.eat(tt.parenL)) {
-      let refDestructuringErrors = new DestructuringErrors, oldYieldPos = this.yieldPos, oldAwaitPos = this.awaitPos
-      this.yieldPos = 0
-      this.awaitPos = 0
-      let exprList = this.parseExprList(tt.parenR, this.options.ecmaVersion >= 8, false, refDestructuringErrors)
-      if (maybeAsyncArrow && !this.canInsertSemicolon() && this.eat(tt.arrow)) {
-        this.checkPatternErrors(refDestructuringErrors, false)
-        this.checkYieldAwaitInDefaultParams()
-        this.yieldPos = oldYieldPos
-        this.awaitPos = oldAwaitPos
-        return this.parseArrowExpression(this.startNodeAt(startPos, startLoc), exprList, true)
-      }
-      this.checkExpressionErrors(refDestructuringErrors, true)
-      this.yieldPos = oldYieldPos || this.yieldPos
-      this.awaitPos = oldAwaitPos || this.awaitPos
-      let node = this.startNodeAt(startPos, startLoc)
-      node.callee = base
-      node.arguments = exprList
-      base = this.finishNode(node, "CallExpression")
-    } else if (this.type === tt.backQuote) {
-      let node = this.startNodeAt(startPos, startLoc)
-      node.tag = base
-      node.quasi = this.parseTemplate()
-      base = this.finishNode(node, "TaggedTemplateExpression")
-    } else {
-      return base
-    }
-  }
-}
-
-// Parse an atomic expression — either a single token that is an
-// expression, an expression started by a keyword like `function` or
-// `new`, or an expression wrapped in punctuation like `()`, `[]`,
-// or `{}`.
-
-pp.parseExprAtom = function(refDestructuringErrors) {
-  let node, canBeArrow = this.potentialArrowAt == this.start
-  switch (this.type) {
-  case tt._super:
-    if (!this.inFunction)
-      this.raise(this.start, "'super' outside of function or class")
-
-  case tt._this:
-    let type = this.type === tt._this ? "ThisExpression" : "Super"
-    node = this.startNode()
-    this.next()
-    return this.finishNode(node, type)
-
-  case tt.name:
-    let startPos = this.start, startLoc = this.startLoc
-    let id = this.parseIdent(this.type !== tt.name)
-    if (this.options.ecmaVersion >= 8 && id.name === "async" && !this.canInsertSemicolon() && this.eat(tt._function))
-      return this.parseFunction(this.startNodeAt(startPos, startLoc), false, false, true)
-    if (canBeArrow && !this.canInsertSemicolon()) {
-      if (this.eat(tt.arrow))
-        return this.parseArrowExpression(this.startNodeAt(startPos, startLoc), [id], false)
-      if (this.options.ecmaVersion >= 8 && id.name === "async" && this.type === tt.name) {
-        id = this.parseIdent()
-        if (this.canInsertSemicolon() || !this.eat(tt.arrow))
-          this.unexpected()
-        return this.parseArrowExpression(this.startNodeAt(startPos, startLoc), [id], true)
-      }
-    }
-    return id
-
-  case tt.regexp:
-    let value = this.value
-    node = this.parseLiteral(value.value)
-    node.regex = {pattern: value.pattern, flags: value.flags}
-    return node
-
-  case tt.num: case tt.string:
-    return this.parseLiteral(this.value)
-
-  case tt._null: case tt._true: case tt._false:
-    node = this.startNode()
-    node.value = this.type === tt._null ? null : this.type === tt._true
-    node.raw = this.type.keyword
-    this.next()
-    return this.finishNode(node, "Literal")
-
-  case tt.parenL:
-    let start = this.start, expr = this.parseParenAndDistinguishExpression(canBeArrow)
-    if (refDestructuringErrors) {
-      if (refDestructuringErrors.parenthesizedAssign < 0 && !this.isSimpleAssignTarget(expr))
-        refDestructuringErrors.parenthesizedAssign = start
-      if (refDestructuringErrors.parenthesizedBind < 0)
-        refDestructuringErrors.parenthesizedBind = start
-    }
-    return expr
-
-  case tt.bracketL:
-    node = this.startNode()
-    this.next()
-    node.elements = this.parseExprList(tt.bracketR, true, true, refDestructuringErrors)
-    return this.finishNode(node, "ArrayExpression")
-
-  case tt.braceL:
-    return this.parseObj(false, refDestructuringErrors)
-
-  case tt._function:
-    node = this.startNode()
-    this.next()
-    return this.parseFunction(node, false)
-
-  case tt._class:
-    return this.parseClass(this.startNode(), false)
-
-  case tt._new:
-    return this.parseNew()
-
-  case tt.backQuote:
-    return this.parseTemplate()
-
-  default:
-    this.unexpected()
-  }
-}
-
-pp.parseLiteral = function(value) {
-  let node = this.startNode()
-  node.value = value
-  node.raw = this.input.slice(this.start, this.end)
-  this.next()
-  return this.finishNode(node, "Literal")
-}
-
-pp.parseParenExpression = function() {
-  this.expect(tt.parenL)
-  let val = this.parseExpression()
-  this.expect(tt.parenR)
-  return val
-}
-
-pp.parseParenAndDistinguishExpression = function(canBeArrow) {
-  let startPos = this.start, startLoc = this.startLoc, val, allowTrailingComma = this.options.ecmaVersion >= 8
-  if (this.options.ecmaVersion >= 6) {
-    this.next()
-
-    let innerStartPos = this.start, innerStartLoc = this.startLoc
-    let exprList = [], first = true, lastIsComma = false
-    let refDestructuringErrors = new DestructuringErrors, oldYieldPos = this.yieldPos, oldAwaitPos = this.awaitPos, spreadStart, innerParenStart
-    this.yieldPos = 0
-    this.awaitPos = 0
-    while (this.type !== tt.parenR) {
-      first ? first = false : this.expect(tt.comma)
-      if (allowTrailingComma && this.afterTrailingComma(tt.parenR, true)) {
-        lastIsComma = true
-        break
-      } else if (this.type === tt.ellipsis) {
-        spreadStart = this.start
-        exprList.push(this.parseParenItem(this.parseRest()))
-        if (this.type === tt.comma) this.raise(this.start, "Comma is not permitted after the rest element")
-        break
-      } else {
-        if (this.type === tt.parenL && !innerParenStart) {
-          innerParenStart = this.start
-        }
-        exprList.push(this.parseMaybeAssign(false, refDestructuringErrors, this.parseParenItem))
-      }
-    }
-    let innerEndPos = this.start, innerEndLoc = this.startLoc
-    this.expect(tt.parenR)
-
-    if (canBeArrow && !this.canInsertSemicolon() && this.eat(tt.arrow)) {
-      this.checkPatternErrors(refDestructuringErrors, false)
-      this.checkYieldAwaitInDefaultParams()
-      if (innerParenStart) this.unexpected(innerParenStart)
-      this.yieldPos = oldYieldPos
-      this.awaitPos = oldAwaitPos
-      return this.parseParenArrowList(startPos, startLoc, exprList)
-    }
-
-    if (!exprList.length || lastIsComma) this.unexpected(this.lastTokStart)
-    if (spreadStart) this.unexpected(spreadStart)
-    this.checkExpressionErrors(refDestructuringErrors, true)
-    this.yieldPos = oldYieldPos || this.yieldPos
-    this.awaitPos = oldAwaitPos || this.awaitPos
-
-    if (exprList.length > 1) {
-      val = this.startNodeAt(innerStartPos, innerStartLoc)
-      val.expressions = exprList
-      this.finishNodeAt(val, "SequenceExpression", innerEndPos, innerEndLoc)
-    } else {
-      val = exprList[0]
-    }
-  } else {
-    val = this.parseParenExpression()
-  }
-
-  if (this.options.preserveParens) {
-    let par = this.startNodeAt(startPos, startLoc)
-    par.expression = val
-    return this.finishNode(par, "ParenthesizedExpression")
-  } else {
-    return val
-  }
-}
-
-pp.parseParenItem = function(item) {
-  return item
-}
-
-pp.parseParenArrowList = function(startPos, startLoc, exprList) {
-  return this.parseArrowExpression(this.startNodeAt(startPos, startLoc), exprList)
-}
-
-// New's precedence is slightly tricky. It must allow its argument to
-// be a `[]` or dot subscript expression, but not a call — at least,
-// not without wrapping it in parentheses. Thus, it uses the noCalls
-// argument to parseSubscripts to prevent it from consuming the
-// argument list.
-
-const empty = []
-
-pp.parseNew = function() {
-  let node = this.startNode()
-  let meta = this.parseIdent(true)
-  if (this.options.ecmaVersion >= 6 && this.eat(tt.dot)) {
-    node.meta = meta
-    node.property = this.parseIdent(true)
-    if (node.property.name !== "target")
-      this.raiseRecoverable(node.property.start, "The only valid meta property for new is new.target")
-    if (!this.inFunction)
-      this.raiseRecoverable(node.start, "new.target can only be used in functions")
-    return this.finishNode(node, "MetaProperty")
-  }
-  let startPos = this.start, startLoc = this.startLoc
-  node.callee = this.parseSubscripts(this.parseExprAtom(), startPos, startLoc, true)
-  if (this.eat(tt.parenL)) node.arguments = this.parseExprList(tt.parenR, this.options.ecmaVersion >= 8, false)
-  else node.arguments = empty
-  return this.finishNode(node, "NewExpression")
-}
-
-// Parse template expression.
-
-pp.parseTemplateElement = function() {
-  let elem = this.startNode()
-  elem.value = {
-    raw: this.input.slice(this.start, this.end).replace(/\r\n?/g, "\n"),
-    cooked: this.value
-  }
-  this.next()
-  elem.tail = this.type === tt.backQuote
-  return this.finishNode(elem, "TemplateElement")
-}
-
-pp.parseTemplate = function() {
-  let node = this.startNode()
-  this.next()
-  node.expressions = []
-  let curElt = this.parseTemplateElement()
-  node.quasis = [curElt]
-  while (!curElt.tail) {
-    this.expect(tt.dollarBraceL)
-    node.expressions.push(this.parseExpression())
-    this.expect(tt.braceR)
-    node.quasis.push(curElt = this.parseTemplateElement())
-  }
-  this.next()
-  return this.finishNode(node, "TemplateLiteral")
-}
-
-// Parse an object literal or binding pattern.
-
-pp.parseObj = function(isPattern, refDestructuringErrors) {
-  let node = this.startNode(), first = true, propHash = {}
-  node.properties = []
-  this.next()
-  while (!this.eat(tt.braceR)) {
-    if (!first) {
-      this.expect(tt.comma)
-      if (this.afterTrailingComma(tt.braceR)) break
-    } else first = false
-
-    let prop = this.startNode(), isGenerator, isAsync, startPos, startLoc
-    if (this.options.ecmaVersion >= 6) {
-      prop.method = false
-      prop.shorthand = false
-      if (isPattern || refDestructuringErrors) {
-        startPos = this.start
-        startLoc = this.startLoc
-      }
-      if (!isPattern)
-        isGenerator = this.eat(tt.star)
-    }
-    this.parsePropertyName(prop)
-    if (!isPattern && this.options.ecmaVersion >= 8 && !isGenerator && !prop.computed &&
-        prop.key.type === "Identifier" && prop.key.name === "async" && this.type !== tt.parenL &&
-        this.type !== tt.colon && !this.canInsertSemicolon()) {
-      isAsync = true
-      this.parsePropertyName(prop, refDestructuringErrors)
-    } else {
-      isAsync = false
-    }
-    this.parsePropertyValue(prop, isPattern, isGenerator, isAsync, startPos, startLoc, refDestructuringErrors)
-    this.checkPropClash(prop, propHash)
-    node.properties.push(this.finishNode(prop, "Property"))
-  }
-  return this.finishNode(node, isPattern ? "ObjectPattern" : "ObjectExpression")
-}
-
-pp.parsePropertyValue = function(prop, isPattern, isGenerator, isAsync, startPos, startLoc, refDestructuringErrors) {
-  if ((isGenerator || isAsync) && this.type === tt.colon)
-    this.unexpected()
-
-  if (this.eat(tt.colon)) {
-    prop.value = isPattern ? this.parseMaybeDefault(this.start, this.startLoc) : this.parseMaybeAssign(false, refDestructuringErrors)
-    prop.kind = "init"
-  } else if (this.options.ecmaVersion >= 6 && this.type === tt.parenL) {
-    if (isPattern) this.unexpected()
-    prop.kind = "init"
-    prop.method = true
-    prop.value = this.parseMethod(isGenerator, isAsync)
-  } else if (this.options.ecmaVersion >= 5 && !prop.computed && prop.key.type === "Identifier" &&
-             (prop.key.name === "get" || prop.key.name === "set") &&
-             (this.type != tt.comma && this.type != tt.braceR)) {
-    if (isGenerator || isAsync || isPattern) this.unexpected()
-    prop.kind = prop.key.name
-    this.parsePropertyName(prop)
-    prop.value = this.parseMethod(false)
-    let paramCount = prop.kind === "get" ? 0 : 1
-    if (prop.value.params.length !== paramCount) {
-      let start = prop.value.start
-      if (prop.kind === "get")
-        this.raiseRecoverable(start, "getter should have no params")
-      else
-        this.raiseRecoverable(start, "setter should have exactly one param")
-    } else {
-      if (prop.kind === "set" && prop.value.params[0].type === "RestElement")
-        this.raiseRecoverable(prop.value.params[0].start, "Setter cannot use rest params")
-    }
-  } else if (this.options.ecmaVersion >= 6 && !prop.computed && prop.key.type === "Identifier") {
-    if (this.keywords.test(prop.key.name) ||
-        (this.strict ? this.reservedWordsStrict : this.reservedWords).test(prop.key.name) ||
-        (this.inGenerator && prop.key.name == "yield") ||
-        (this.inAsync && prop.key.name == "await"))
-      this.raiseRecoverable(prop.key.start, "'" + prop.key.name + "' can not be used as shorthand property")
-    prop.kind = "init"
-    if (isPattern) {
-      prop.value = this.parseMaybeDefault(startPos, startLoc, prop.key)
-    } else if (this.type === tt.eq && refDestructuringErrors) {
-      if (refDestructuringErrors.shorthandAssign < 0)
-        refDestructuringErrors.shorthandAssign = this.start
-      prop.value = this.parseMaybeDefault(startPos, startLoc, prop.key)
-    } else {
-      prop.value = prop.key
-    }
-    prop.shorthand = true
-  } else this.unexpected()
-}
-
-pp.parsePropertyName = function(prop) {
-  if (this.options.ecmaVersion >= 6) {
-    if (this.eat(tt.bracketL)) {
-      prop.computed = true
-      prop.key = this.parseMaybeAssign()
-      this.expect(tt.bracketR)
-      return prop.key
-    } else {
-      prop.computed = false
-    }
-  }
-  return prop.key = this.type === tt.num || this.type === tt.string ? this.parseExprAtom() : this.parseIdent(true)
-}
-
-// Initialize empty function node.
-
-pp.initFunction = function(node) {
-  node.id = null
-  if (this.options.ecmaVersion >= 6) {
-    node.generator = false
-    node.expression = false
-  }
-  if (this.options.ecmaVersion >= 8)
-    node.async = false
-}
-
-// Parse object or class method.
-
-pp.parseMethod = function(isGenerator, isAsync) {
-  let node = this.startNode(), oldInGen = this.inGenerator, oldInAsync = this.inAsync,
-      oldYieldPos = this.yieldPos, oldAwaitPos = this.awaitPos, oldInFunc = this.inFunction
-
-  this.initFunction(node)
-  if (this.options.ecmaVersion >= 6)
-    node.generator = isGenerator
-  if (this.options.ecmaVersion >= 8)
-    node.async = !!isAsync
-
-  this.inGenerator = node.generator
-  this.inAsync = node.async
-  this.yieldPos = 0
-  this.awaitPos = 0
-  this.inFunction = true
-  this.enterFunctionScope()
-
-  this.expect(tt.parenL)
-  node.params = this.parseBindingList(tt.parenR, false, this.options.ecmaVersion >= 8)
-  this.checkYieldAwaitInDefaultParams()
-  this.parseFunctionBody(node, false)
-
-  this.inGenerator = oldInGen
-  this.inAsync = oldInAsync
-  this.yieldPos = oldYieldPos
-  this.awaitPos = oldAwaitPos
-  this.inFunction = oldInFunc
-  return this.finishNode(node, "FunctionExpression")
-}
-
-// Parse arrow function expression with given parameters.
-
-pp.parseArrowExpression = function(node, params, isAsync) {
-  let oldInGen = this.inGenerator, oldInAsync = this.inAsync,
-      oldYieldPos = this.yieldPos, oldAwaitPos = this.awaitPos, oldInFunc = this.inFunction
-
-  this.enterFunctionScope()
-  this.initFunction(node)
-  if (this.options.ecmaVersion >= 8)
-    node.async = !!isAsync
-
-  this.inGenerator = false
-  this.inAsync = node.async
-  this.yieldPos = 0
-  this.awaitPos = 0
-  this.inFunction = true
-
-  node.params = this.toAssignableList(params, true)
-  this.parseFunctionBody(node, true)
-
-  this.inGenerator = oldInGen
-  this.inAsync = oldInAsync
-  this.yieldPos = oldYieldPos
-  this.awaitPos = oldAwaitPos
-  this.inFunction = oldInFunc
-  return this.finishNode(node, "ArrowFunctionExpression")
-}
-
-// Parse function body and check parameters.
-
-pp.parseFunctionBody = function(node, isArrowFunction) {
-  let isExpression = isArrowFunction && this.type !== tt.braceL
-  let oldStrict = this.strict, useStrict = false
-
-  if (isExpression) {
-    node.body = this.parseMaybeAssign()
-    node.expression = true
-    this.checkParams(node, false)
-  } else {
-    let nonSimple = this.options.ecmaVersion >= 7 && !this.isSimpleParamList(node.params)
-    if (!oldStrict || nonSimple) {
-      useStrict = this.strictDirective(this.end)
-      // If this is a strict mode function, verify that argument names
-      // are not repeated, and it does not try to bind the words `eval`
-      // or `arguments`.
-      if (useStrict && nonSimple)
-        this.raiseRecoverable(node.start, "Illegal 'use strict' directive in function with non-simple parameter list")
-    }
-    // Start a new scope with regard to labels and the `inFunction`
-    // flag (restore them to their old value afterwards).
-    let oldLabels = this.labels
-    this.labels = []
-    if (useStrict) this.strict = true
-
-    // Add the params to varDeclaredNames to ensure that an error is thrown
-    // if a let/const declaration in the function clashes with one of the params.
-    this.checkParams(node, !oldStrict && !useStrict && !isArrowFunction && this.isSimpleParamList(node.params))
-    node.body = this.parseBlock(false)
-    node.expression = false
-    this.labels = oldLabels
-  }
-  this.exitFunctionScope()
-
-  if (this.strict && node.id) {
-    // Ensure the function name isn't a forbidden identifier in strict mode, e.g. 'eval'
-    this.checkLVal(node.id, "none")
-  }
-  this.strict = oldStrict
-}
-
-pp.isSimpleParamList = function(params) {
-  for (let i = 0; i < params.length; i++)
-    if (params[i].type !== "Identifier") return false
-  return true
-}
-
-// Checks function params for various disallowed patterns such as using "eval"
-// or "arguments" and duplicate parameters.
-
-pp.checkParams = function(node, allowDuplicates) {
-  let nameHash = {}
-  for (let i = 0; i < node.params.length; i++) this.checkLVal(node.params[i], "var", allowDuplicates ? null : nameHash)
-}
-
-// Parses a comma-separated list of expressions, and returns them as
-// an array. `close` is the token type that ends the list, and
-// `allowEmpty` can be turned on to allow subsequent commas with
-// nothing in between them to be parsed as `null` (which is needed
-// for array literals).
-
-pp.parseExprList = function(close, allowTrailingComma, allowEmpty, refDestructuringErrors) {
-  let elts = [], first = true
-  while (!this.eat(close)) {
-    if (!first) {
-      this.expect(tt.comma)
-      if (allowTrailingComma && this.afterTrailingComma(close)) break
-    } else first = false
-
-    let elt
-    if (allowEmpty && this.type === tt.comma)
-      elt = null
-    else if (this.type === tt.ellipsis) {
-      elt = this.parseSpread(refDestructuringErrors)
-      if (refDestructuringErrors && this.type === tt.comma && refDestructuringErrors.trailingComma < 0)
-        refDestructuringErrors.trailingComma = this.start
-    } else {
-      elt = this.parseMaybeAssign(false, refDestructuringErrors)
-    }
-    elts.push(elt)
-  }
-  return elts
-}
-
-// Parse the next token as an identifier. If `liberal` is true (used
-// when parsing properties), it will also convert keywords into
-// identifiers.
-
-pp.parseIdent = function(liberal) {
-  let node = this.startNode()
-  if (liberal && this.options.allowReserved == "never") liberal = false
-  if (this.type === tt.name) {
-    if (!liberal && (this.strict ? this.reservedWordsStrict : this.reservedWords).test(this.value) &&
-        (this.options.ecmaVersion >= 6 ||
-         this.input.slice(this.start, this.end).indexOf("\\") == -1))
-      this.raiseRecoverable(this.start, "The keyword '" + this.value + "' is reserved")
-    if (this.inGenerator && this.value === "yield")
-      this.raiseRecoverable(this.start, "Can not use 'yield' as identifier inside a generator")
-    if (this.inAsync && this.value === "await")
-      this.raiseRecoverable(this.start, "Can not use 'await' as identifier inside an async function")
-    node.name = this.value
-  } else if (liberal && this.type.keyword) {
-    node.name = this.type.keyword
-  } else {
-    this.unexpected()
-  }
-  this.next()
-  return this.finishNode(node, "Identifier")
-}
-
-// Parses yield expression inside generator.
-
-pp.parseYield = function() {
-  if (!this.yieldPos) this.yieldPos = this.start
-
-  let node = this.startNode()
-  this.next()
-  if (this.type == tt.semi || this.canInsertSemicolon() || (this.type != tt.star && !this.type.startsExpr)) {
-    node.delegate = false
-    node.argument = null
-  } else {
-    node.delegate = this.eat(tt.star)
-    node.argument = this.parseMaybeAssign()
-  }
-  return this.finishNode(node, "YieldExpression")
-}
-
-pp.parseAwait = function() {
-  if (!this.awaitPos) this.awaitPos = this.start
-
-  let node = this.startNode()
-  this.next()
-  node.argument = this.parseMaybeUnary(null, true)
-  return this.finishNode(node, "AwaitExpression")
-}
diff --git a/node_modules/acorn/src/identifier.js b/node_modules/acorn/src/identifier.js
deleted file mode 100644
index fa5ded616..000000000
--- a/node_modules/acorn/src/identifier.js
+++ /dev/null
@@ -1,85 +0,0 @@
-// Reserved word lists for various dialects of the language
-
-export const reservedWords = {
-  3: "abstract boolean byte char class double enum export extends final float goto implements import int interface long native package private protected public short static super synchronized throws transient volatile",
-  5: "class enum extends super const export import",
-  6: "enum",
-  strict: "implements interface let package private protected public static yield",
-  strictBind: "eval arguments"
-}
-
-// And the keywords
-
-const ecma5AndLessKeywords = "break case catch continue debugger default do else finally for function if return switch throw try var while with null true false instanceof typeof void delete new in this"
-
-export const keywords = {
-  5: ecma5AndLessKeywords,
-  6: ecma5AndLessKeywords + " const class extends export import super"
-}
-
-// ## Character categories
-
-// Big ugly regular expressions that match characters in the
-// whitespace, identifier, and identifier-start categories. These
-// are only applied when a character is found to actually have a
-// code point above 128.
-// Generated by `bin/generate-identifier-regex.js`.
-
-let nonASCIIidentifierStartChars = "\xaa\xb5\xba\xc0-\xd6\xd8-\xf6\xf8-\u02c1\u02c6-\u02d1\u02e0-\u02e4\u02ec\u02ee\u0370-\u0374\u0376\u0377\u037a-\u037d\u037f\u0386\u0388-\u038a\u038c\u038e-\u03a1\u03a3-\u03f5\u03f7-\u0481\u048a-\u052f\u0531-\u0556\u0559\u0561-\u0587\u05d0-\u05ea\u05f0-\u05f2\u0620-\u064a\u066e\u066f\u0671-\u06d3\u06d5\u06e5\u06e6\u06ee\u06ef\u06fa-\u06fc\u06ff\u0710\u0712-\u072f\u074d-\u07a5\u07b1\u07ca-\u07ea\u07f4\u07f5\u07fa\u0800-\u0815\u081a\u0824\u0828\u0840-\u0858\u08a0-\u08b4\u08b6-\u08bd\u0904-\u0939\u093d\u0950\u0958-\u0961\u0971-\u0980\u0985-\u098c\u098f\u0990\u0993-\u09a8\u09aa-\u09b0\u09b2\u09b6-\u09b9\u09bd\u09ce\u09dc\u09dd\u09df-\u09e1\u09f0\u09f1\u0a05-\u0a0a\u0a0f\u0a10\u0a13-\u0a28\u0a2a-\u0a30\u0a32\u0a33\u0a35\u0a36\u0a38\u0a39\u0a59-\u0a5c\u0a5e\u0a72-\u0a74\u0a85-\u0a8d\u0a8f-\u0a91\u0a93-\u0aa8\u0aaa-\u0ab0\u0ab2\u0ab3\u0ab5-\u0ab9\u0abd\u0ad0\u0ae0\u0ae1\u0af9\u0b05-\u0b0c\u0b0f\u0b10\u0b13-\u0b28\u0b2a-\u0b30\u0b32\u0b33\u0b35-\u0b39\u0b3d\u0b5c\u0b5d\u0b5f-\u0b61\u0b71\u0b83\u0b85-\u0b8a\u0b8e-\u0b90\u0b92-\u0b95\u0b99\u0b9a\u0b9c\u0b9e\u0b9f\u0ba3\u0ba4\u0ba8-\u0baa\u0bae-\u0bb9\u0bd0\u0c05-\u0c0c\u0c0e-\u0c10\u0c12-\u0c28\u0c2a-\u0c39\u0c3d\u0c58-\u0c5a\u0c60\u0c61\u0c80\u0c85-\u0c8c\u0c8e-\u0c90\u0c92-\u0ca8\u0caa-\u0cb3\u0cb5-\u0cb9\u0cbd\u0cde\u0ce0\u0ce1\u0cf1\u0cf2\u0d05-\u0d0c\u0d0e-\u0d10\u0d12-\u0d3a\u0d3d\u0d4e\u0d54-\u0d56\u0d5f-\u0d61\u0d7a-\u0d7f\u0d85-\u0d96\u0d9a-\u0db1\u0db3-\u0dbb\u0dbd\u0dc0-\u0dc6\u0e01-\u0e30\u0e32\u0e33\u0e40-\u0e46\u0e81\u0e82\u0e84\u0e87\u0e88\u0e8a\u0e8d\u0e94-\u0e97\u0e99-\u0e9f\u0ea1-\u0ea3\u0ea5\u0ea7\u0eaa\u0eab\u0ead-\u0eb0\u0eb2\u0eb3\u0ebd\u0ec0-\u0ec4\u0ec6\u0edc-\u0edf\u0f00\u0f40-\u0f47\u0f49-\u0f6c\u0f88-\u0f8c\u1000-\u102a\u103f\u1050-\u1055\u105a-\u105d\u1061\u1065\u1066\u106e-\u1070\u1075-\u1081\u108e\u10a0-\u10c5\u10c7\u10cd\u10d0-\u10fa\u10fc-\u1248\u124a-\u124d\u1250-\u1256\u1258\u125a-\u125d\u1260-\u1288\u128a-\u128d\u1290-\u12b0\u12b2-\u12b5\u12b8-\u12be\u12c0\u12c2-\u12c5\u12c8-\u12d6\u12d8-\u1310\u1312-\u1315\u1318-\u135a\u1380-\u138f\u13a0-\u13f5\u13f8-\u13fd\u1401-\u166c\u166f-\u167f\u1681-\u169a\u16a0-\u16ea\u16ee-\u16f8\u1700-\u170c\u170e-\u1711\u1720-\u1731\u1740-\u1751\u1760-\u176c\u176e-\u1770\u1780-\u17b3\u17d7\u17dc\u1820-\u1877\u1880-\u18a8\u18aa\u18b0-\u18f5\u1900-\u191e\u1950-\u196d\u1970-\u1974\u1980-\u19ab\u19b0-\u19c9\u1a00-\u1a16\u1a20-\u1a54\u1aa7\u1b05-\u1b33\u1b45-\u1b4b\u1b83-\u1ba0\u1bae\u1baf\u1bba-\u1be5\u1c00-\u1c23\u1c4d-\u1c4f\u1c5a-\u1c7d\u1c80-\u1c88\u1ce9-\u1cec\u1cee-\u1cf1\u1cf5\u1cf6\u1d00-\u1dbf\u1e00-\u1f15\u1f18-\u1f1d\u1f20-\u1f45\u1f48-\u1f4d\u1f50-\u1f57\u1f59\u1f5b\u1f5d\u1f5f-\u1f7d\u1f80-\u1fb4\u1fb6-\u1fbc\u1fbe\u1fc2-\u1fc4\u1fc6-\u1fcc\u1fd0-\u1fd3\u1fd6-\u1fdb\u1fe0-\u1fec\u1ff2-\u1ff4\u1ff6-\u1ffc\u2071\u207f\u2090-\u209c\u2102\u2107\u210a-\u2113\u2115\u2118-\u211d\u2124\u2126\u2128\u212a-\u2139\u213c-\u213f\u2145-\u2149\u214e\u2160-\u2188\u2c00-\u2c2e\u2c30-\u2c5e\u2c60-\u2ce4\u2ceb-\u2cee\u2cf2\u2cf3\u2d00-\u2d25\u2d27\u2d2d\u2d30-\u2d67\u2d6f\u2d80-\u2d96\u2da0-\u2da6\u2da8-\u2dae\u2db0-\u2db6\u2db8-\u2dbe\u2dc0-\u2dc6\u2dc8-\u2dce\u2dd0-\u2dd6\u2dd8-\u2dde\u3005-\u3007\u3021-\u3029\u3031-\u3035\u3038-\u303c\u3041-\u3096\u309b-\u309f\u30a1-\u30fa\u30fc-\u30ff\u3105-\u312d\u3131-\u318e\u31a0-\u31ba\u31f0-\u31ff\u3400-\u4db5\u4e00-\u9fd5\ua000-\ua48c\ua4d0-\ua4fd\ua500-\ua60c\ua610-\ua61f\ua62a\ua62b\ua640-\ua66e\ua67f-\ua69d\ua6a0-\ua6ef\ua717-\ua71f\ua722-\ua788\ua78b-\ua7ae\ua7b0-\ua7b7\ua7f7-\ua801\ua803-\ua805\ua807-\ua80a\ua80c-\ua822\ua840-\ua873\ua882-\ua8b3\ua8f2-\ua8f7\ua8fb\ua8fd\ua90a-\ua925\ua930-\ua946\ua960-\ua97c\ua984-\ua9b2\ua9cf\ua9e0-\ua9e4\ua9e6-\ua9ef\ua9fa-\ua9fe\uaa00-\uaa28\uaa40-\uaa42\uaa44-\uaa4b\uaa60-\uaa76\uaa7a\uaa7e-\uaaaf\uaab1\uaab5\uaab6\uaab9-\uaabd\uaac0\uaac2\uaadb-\uaadd\uaae0-\uaaea\uaaf2-\uaaf4\uab01-\uab06\uab09-\uab0e\uab11-\uab16\uab20-\uab26\uab28-\uab2e\uab30-\uab5a\uab5c-\uab65\uab70-\uabe2\uac00-\ud7a3\ud7b0-\ud7c6\ud7cb-\ud7fb\uf900-\ufa6d\ufa70-\ufad9\ufb00-\ufb06\ufb13-\ufb17\ufb1d\ufb1f-\ufb28\ufb2a-\ufb36\ufb38-\ufb3c\ufb3e\ufb40\ufb41\ufb43\ufb44\ufb46-\ufbb1\ufbd3-\ufd3d\ufd50-\ufd8f\ufd92-\ufdc7\ufdf0-\ufdfb\ufe70-\ufe74\ufe76-\ufefc\uff21-\uff3a\uff41-\uff5a\uff66-\uffbe\uffc2-\uffc7\uffca-\uffcf\uffd2-\uffd7\uffda-\uffdc"
-let nonASCIIidentifierChars = "\u200c\u200d\xb7\u0300-\u036f\u0387\u0483-\u0487\u0591-\u05bd\u05bf\u05c1\u05c2\u05c4\u05c5\u05c7\u0610-\u061a\u064b-\u0669\u0670\u06d6-\u06dc\u06df-\u06e4\u06e7\u06e8\u06ea-\u06ed\u06f0-\u06f9\u0711\u0730-\u074a\u07a6-\u07b0\u07c0-\u07c9\u07eb-\u07f3\u0816-\u0819\u081b-\u0823\u0825-\u0827\u0829-\u082d\u0859-\u085b\u08d4-\u08e1\u08e3-\u0903\u093a-\u093c\u093e-\u094f\u0951-\u0957\u0962\u0963\u0966-\u096f\u0981-\u0983\u09bc\u09be-\u09c4\u09c7\u09c8\u09cb-\u09cd\u09d7\u09e2\u09e3\u09e6-\u09ef\u0a01-\u0a03\u0a3c\u0a3e-\u0a42\u0a47\u0a48\u0a4b-\u0a4d\u0a51\u0a66-\u0a71\u0a75\u0a81-\u0a83\u0abc\u0abe-\u0ac5\u0ac7-\u0ac9\u0acb-\u0acd\u0ae2\u0ae3\u0ae6-\u0aef\u0b01-\u0b03\u0b3c\u0b3e-\u0b44\u0b47\u0b48\u0b4b-\u0b4d\u0b56\u0b57\u0b62\u0b63\u0b66-\u0b6f\u0b82\u0bbe-\u0bc2\u0bc6-\u0bc8\u0bca-\u0bcd\u0bd7\u0be6-\u0bef\u0c00-\u0c03\u0c3e-\u0c44\u0c46-\u0c48\u0c4a-\u0c4d\u0c55\u0c56\u0c62\u0c63\u0c66-\u0c6f\u0c81-\u0c83\u0cbc\u0cbe-\u0cc4\u0cc6-\u0cc8\u0cca-\u0ccd\u0cd5\u0cd6\u0ce2\u0ce3\u0ce6-\u0cef\u0d01-\u0d03\u0d3e-\u0d44\u0d46-\u0d48\u0d4a-\u0d4d\u0d57\u0d62\u0d63\u0d66-\u0d6f\u0d82\u0d83\u0dca\u0dcf-\u0dd4\u0dd6\u0dd8-\u0ddf\u0de6-\u0def\u0df2\u0df3\u0e31\u0e34-\u0e3a\u0e47-\u0e4e\u0e50-\u0e59\u0eb1\u0eb4-\u0eb9\u0ebb\u0ebc\u0ec8-\u0ecd\u0ed0-\u0ed9\u0f18\u0f19\u0f20-\u0f29\u0f35\u0f37\u0f39\u0f3e\u0f3f\u0f71-\u0f84\u0f86\u0f87\u0f8d-\u0f97\u0f99-\u0fbc\u0fc6\u102b-\u103e\u1040-\u1049\u1056-\u1059\u105e-\u1060\u1062-\u1064\u1067-\u106d\u1071-\u1074\u1082-\u108d\u108f-\u109d\u135d-\u135f\u1369-\u1371\u1712-\u1714\u1732-\u1734\u1752\u1753\u1772\u1773\u17b4-\u17d3\u17dd\u17e0-\u17e9\u180b-\u180d\u1810-\u1819\u18a9\u1920-\u192b\u1930-\u193b\u1946-\u194f\u19d0-\u19da\u1a17-\u1a1b\u1a55-\u1a5e\u1a60-\u1a7c\u1a7f-\u1a89\u1a90-\u1a99\u1ab0-\u1abd\u1b00-\u1b04\u1b34-\u1b44\u1b50-\u1b59\u1b6b-\u1b73\u1b80-\u1b82\u1ba1-\u1bad\u1bb0-\u1bb9\u1be6-\u1bf3\u1c24-\u1c37\u1c40-\u1c49\u1c50-\u1c59\u1cd0-\u1cd2\u1cd4-\u1ce8\u1ced\u1cf2-\u1cf4\u1cf8\u1cf9\u1dc0-\u1df5\u1dfb-\u1dff\u203f\u2040\u2054\u20d0-\u20dc\u20e1\u20e5-\u20f0\u2cef-\u2cf1\u2d7f\u2de0-\u2dff\u302a-\u302f\u3099\u309a\ua620-\ua629\ua66f\ua674-\ua67d\ua69e\ua69f\ua6f0\ua6f1\ua802\ua806\ua80b\ua823-\ua827\ua880\ua881\ua8b4-\ua8c5\ua8d0-\ua8d9\ua8e0-\ua8f1\ua900-\ua909\ua926-\ua92d\ua947-\ua953\ua980-\ua983\ua9b3-\ua9c0\ua9d0-\ua9d9\ua9e5\ua9f0-\ua9f9\uaa29-\uaa36\uaa43\uaa4c\uaa4d\uaa50-\uaa59\uaa7b-\uaa7d\uaab0\uaab2-\uaab4\uaab7\uaab8\uaabe\uaabf\uaac1\uaaeb-\uaaef\uaaf5\uaaf6\uabe3-\uabea\uabec\uabed\uabf0-\uabf9\ufb1e\ufe00-\ufe0f\ufe20-\ufe2f\ufe33\ufe34\ufe4d-\ufe4f\uff10-\uff19\uff3f"
-
-const nonASCIIidentifierStart = new RegExp("[" + nonASCIIidentifierStartChars + "]")
-const nonASCIIidentifier = new RegExp("[" + nonASCIIidentifierStartChars + nonASCIIidentifierChars + "]")
-
-nonASCIIidentifierStartChars = nonASCIIidentifierChars = null
-
-// These are a run-length and offset encoded representation of the
-// >0xffff code points that are a valid part of identifiers. The
-// offset starts at 0x10000, and each pair of numbers represents an
-// offset to the next range, and then a size of the range. They were
-// generated by bin/generate-identifier-regex.js
-
-// eslint-disable-next-line comma-spacing
-const astralIdentifierStartCodes = [0,11,2,25,2,18,2,1,2,14,3,13,35,122,70,52,268,28,4,48,48,31,17,26,6,37,11,29,3,35,5,7,2,4,43,157,19,35,5,35,5,39,9,51,157,310,10,21,11,7,153,5,3,0,2,43,2,1,4,0,3,22,11,22,10,30,66,18,2,1,11,21,11,25,71,55,7,1,65,0,16,3,2,2,2,26,45,28,4,28,36,7,2,27,28,53,11,21,11,18,14,17,111,72,56,50,14,50,785,52,76,44,33,24,27,35,42,34,4,0,13,47,15,3,22,0,2,0,36,17,2,24,85,6,2,0,2,3,2,14,2,9,8,46,39,7,3,1,3,21,2,6,2,1,2,4,4,0,19,0,13,4,159,52,19,3,54,47,21,1,2,0,185,46,42,3,37,47,21,0,60,42,86,25,391,63,32,0,449,56,264,8,2,36,18,0,50,29,881,921,103,110,18,195,2749,1070,4050,582,8634,568,8,30,114,29,19,47,17,3,32,20,6,18,881,68,12,0,67,12,65,0,32,6124,20,754,9486,1,3071,106,6,12,4,8,8,9,5991,84,2,70,2,1,3,0,3,1,3,3,2,11,2,0,2,6,2,64,2,3,3,7,2,6,2,27,2,3,2,4,2,0,4,6,2,339,3,24,2,24,2,30,2,24,2,30,2,24,2,30,2,24,2,30,2,24,2,7,4149,196,60,67,1213,3,2,26,2,1,2,0,3,0,2,9,2,3,2,0,2,0,7,0,5,0,2,0,2,0,2,2,2,1,2,0,3,0,2,0,2,0,2,0,2,0,2,1,2,0,3,3,2,6,2,3,2,3,2,0,2,9,2,16,6,2,2,4,2,16,4421,42710,42,4148,12,221,3,5761,10591,541]
-
-// eslint-disable-next-line comma-spacing
-const astralIdentifierCodes = [509,0,227,0,150,4,294,9,1368,2,2,1,6,3,41,2,5,0,166,1,1306,2,54,14,32,9,16,3,46,10,54,9,7,2,37,13,2,9,52,0,13,2,49,13,10,2,4,9,83,11,7,0,161,11,6,9,7,3,57,0,2,6,3,1,3,2,10,0,11,1,3,6,4,4,193,17,10,9,87,19,13,9,214,6,3,8,28,1,83,16,16,9,82,12,9,9,84,14,5,9,423,9,838,7,2,7,17,9,57,21,2,13,19882,9,135,4,60,6,26,9,1016,45,17,3,19723,1,5319,4,4,5,9,7,3,6,31,3,149,2,1418,49,513,54,5,49,9,0,15,0,23,4,2,14,1361,6,2,16,3,6,2,1,2,4,2214,6,110,6,6,9,792487,239]
-
-// This has a complexity linear to the value of the code. The
-// assumption is that looking up astral identifier characters is
-// rare.
-function isInAstralSet(code, set) {
-  let pos = 0x10000
-  for (let i = 0; i < set.length; i += 2) {
-    pos += set[i]
-    if (pos > code) return false
-    pos += set[i + 1]
-    if (pos >= code) return true
-  }
-}
-
-// Test whether a given character code starts an identifier.
-
-export function isIdentifierStart(code, astral) {
-  if (code < 65) return code === 36
-  if (code < 91) return true
-  if (code < 97) return code === 95
-  if (code < 123) return true
-  if (code <= 0xffff) return code >= 0xaa && nonASCIIidentifierStart.test(String.fromCharCode(code))
-  if (astral === false) return false
-  return isInAstralSet(code, astralIdentifierStartCodes)
-}
-
-// Test whether a given character is part of an identifier.
-
-export function isIdentifierChar(code, astral) {
-  if (code < 48) return code === 36
-  if (code < 58) return true
-  if (code < 65) return false
-  if (code < 91) return true
-  if (code < 97) return code === 95
-  if (code < 123) return true
-  if (code <= 0xffff) return code >= 0xaa && nonASCIIidentifier.test(String.fromCharCode(code))
-  if (astral === false) return false
-  return isInAstralSet(code, astralIdentifierStartCodes) || isInAstralSet(code, astralIdentifierCodes)
-}
diff --git a/node_modules/acorn/src/index.js b/node_modules/acorn/src/index.js
deleted file mode 100644
index 9c25d92ee..000000000
--- a/node_modules/acorn/src/index.js
+++ /dev/null
@@ -1,78 +0,0 @@
-// Acorn is a tiny, fast JavaScript parser written in JavaScript.
-//
-// Acorn was written by Marijn Haverbeke, Ingvar Stepanyan, and
-// various contributors and released under an MIT license.
-//
-// Git repositories for Acorn are available at
-//
-//     http://marijnhaverbeke.nl/git/acorn
-//     https://github.com/ternjs/acorn.git
-//
-// Please use the [github bug tracker][ghbt] to report issues.
-//
-// [ghbt]: https://github.com/ternjs/acorn/issues
-//
-// This file defines the main parser interface. The library also comes
-// with a [error-tolerant parser][dammit] and an
-// [abstract syntax tree walker][walk], defined in other files.
-//
-// [dammit]: acorn_loose.js
-// [walk]: util/walk.js
-
-import {Parser} from "./state"
-import "./parseutil"
-import "./statement"
-import "./lval"
-import "./expression"
-import "./location"
-import "./scope"
-
-export {Parser, plugins} from "./state"
-export {defaultOptions} from "./options"
-export {Position, SourceLocation, getLineInfo} from "./locutil"
-export {Node} from "./node"
-export {TokenType, types as tokTypes, keywords as keywordTypes} from "./tokentype"
-export {TokContext, types as tokContexts} from "./tokencontext"
-export {isIdentifierChar, isIdentifierStart} from "./identifier"
-export {Token} from "./tokenize"
-export {isNewLine, lineBreak, lineBreakG, nonASCIIwhitespace} from "./whitespace"
-
-export const version = "5.0.3"
-
-// The main exported interface (under `self.acorn` when in the
-// browser) is a `parse` function that takes a code string and
-// returns an abstract syntax tree as specified by [Mozilla parser
-// API][api].
-//
-// [api]: https://developer.mozilla.org/en-US/docs/SpiderMonkey/Parser_API
-
-export function parse(input, options) {
-  return new Parser(options, input).parse()
-}
-
-// This function tries to parse a single expression at a given
-// offset in a string. Useful for parsing mixed-language formats
-// that embed JavaScript expressions.
-
-export function parseExpressionAt(input, pos, options) {
-  let p = new Parser(options, input, pos)
-  p.nextToken()
-  return p.parseExpression()
-}
-
-// Acorn is organized as a tokenizer and a recursive-descent parser.
-// The `tokenizer` export provides an interface to the tokenizer.
-
-export function tokenizer(input, options) {
-  return new Parser(options, input)
-}
-
-// This is a terrible kludge to support the existing, pre-ES6
-// interface where the loose parser module retroactively adds exports
-// to this module.
-export let parse_dammit, LooseParser, pluginsLoose // eslint-disable-line camelcase
-export function addLooseExports(parse, Parser, plugins) {
-  parse_dammit = parse // eslint-disable-line camelcase
-  LooseParser = Parser
-  pluginsLoose = plugins
-}
diff --git a/node_modules/acorn/src/location.js b/node_modules/acorn/src/location.js
deleted file mode 100644
index 99e71234c..000000000
--- a/node_modules/acorn/src/location.js
+++ /dev/null
@@ -1,26 +0,0 @@
-import {Parser} from "./state"
-import {Position, getLineInfo} from "./locutil"
-
-const pp = Parser.prototype
-
-// This function is used to raise exceptions on parse errors. It
-// takes an offset integer (into the current `input`) to indicate
-// the location of the error, attaches the position to the end
-// of the error message, and then raises a `SyntaxError` with that
-// message.
-
-pp.raise = function(pos, message) {
-  let loc = getLineInfo(this.input, pos)
-  message += " (" + loc.line + ":" + loc.column + ")"
-  let err = new SyntaxError(message)
-  err.pos = pos; err.loc = loc; err.raisedAt = this.pos
-  throw err
-}
-
-pp.raiseRecoverable = pp.raise
-
-pp.curPosition = function() {
-  if (this.options.locations) {
-    return new Position(this.curLine, this.pos - this.lineStart)
-  }
-}
diff --git a/node_modules/acorn/src/locutil.js b/node_modules/acorn/src/locutil.js
deleted file mode 100644
index 5a9465e01..000000000
--- a/node_modules/acorn/src/locutil.js
+++ /dev/null
@@ -1,42 +0,0 @@
-import {lineBreakG} from "./whitespace"
-
-// These are used when `options.locations` is on, for the
-// `startLoc` and `endLoc` properties.
-
-export class Position {
-  constructor(line, col) {
-    this.line = line
-    this.column = col
-  }
-
-  offset(n) {
-    return new Position(this.line, this.column + n)
-  }
-}
-
-export class SourceLocation {
-  constructor(p, start, end) {
-    this.start = start
-    this.end = end
-    if (p.sourceFile !== null) this.source = p.sourceFile
-  }
-}
-
-// The `getLineInfo` function is mostly useful when the
-// `locations` option is off (for performance reasons) and you
-// want to find the line/column position for a given character
-// offset. `input` should be the code string that the offset refers
-// into.
-
-export function getLineInfo(input, offset) {
-  for (let line = 1, cur = 0;;) {
-    lineBreakG.lastIndex = cur
-    let match = lineBreakG.exec(input)
-    if (match && match.index < offset) {
-      ++line
-      cur = match.index + match[0].length
-    } else {
-      return new Position(line, offset - cur)
-    }
-  }
-}
diff --git a/node_modules/acorn/src/loose/expression.js b/node_modules/acorn/src/loose/expression.js
deleted file mode 100644
index 62bd42de3..000000000
--- a/node_modules/acorn/src/loose/expression.js
+++ /dev/null
@@ -1,562 +0,0 @@
-import {LooseParser} from "./state"
-import {isDummy} from "./parseutil"
-import {tokTypes as tt} from "../index"
-
-const lp = LooseParser.prototype
-
-lp.checkLVal = function(expr) {
-  if (!expr) return expr
-  switch (expr.type) {
-  case "Identifier":
-  case "MemberExpression":
-    return expr
-
-  case "ParenthesizedExpression":
-    expr.expression = this.checkLVal(expr.expression)
-    return expr
-
-  default:
-    return this.dummyIdent()
-  }
-}
-
-lp.parseExpression = function(noIn) {
-  let start = this.storeCurrentPos()
-  let expr = this.parseMaybeAssign(noIn)
-  if (this.tok.type === tt.comma) {
-    let node = this.startNodeAt(start)
-    node.expressions = [expr]
-    while (this.eat(tt.comma)) node.expressions.push(this.parseMaybeAssign(noIn))
-    return this.finishNode(node, "SequenceExpression")
-  }
-  return expr
-}
-
-lp.parseParenExpression = function() {
-  this.pushCx()
-  this.expect(tt.parenL)
-  let val = this.parseExpression()
-  this.popCx()
-  this.expect(tt.parenR)
-  return val
-}
-
-lp.parseMaybeAssign = function(noIn) {
-  if (this.toks.isContextual("yield")) {
-    let node = this.startNode()
-    this.next()
-    if (this.semicolon() || this.canInsertSemicolon() || (this.tok.type != tt.star && !this.tok.type.startsExpr)) {
-      node.delegate = false
-      node.argument = null
-    } else {
-      node.delegate = this.eat(tt.star)
-      node.argument = this.parseMaybeAssign()
-    }
-    return this.finishNode(node, "YieldExpression")
-  }
-
-  let start = this.storeCurrentPos()
-  let left = this.parseMaybeConditional(noIn)
-  if (this.tok.type.isAssign) {
-    let node = this.startNodeAt(start)
-    node.operator = this.tok.value
-    node.left = this.tok.type === tt.eq ? this.toAssignable(left) : this.checkLVal(left)
-    this.next()
-    node.right = this.parseMaybeAssign(noIn)
-    return this.finishNode(node, "AssignmentExpression")
-  }
-  return left
-}
-
-lp.parseMaybeConditional = function(noIn) {
-  let start = this.storeCurrentPos()
-  let expr = this.parseExprOps(noIn)
-  if (this.eat(tt.question)) {
-    let node = this.startNodeAt(start)
-    node.test = expr
-    node.consequent = this.parseMaybeAssign()
-    node.alternate = this.expect(tt.colon) ? this.parseMaybeAssign(noIn) : this.dummyIdent()
-    return this.finishNode(node, "ConditionalExpression")
-  }
-  return expr
-}
-
-lp.parseExprOps = function(noIn) {
-  let start = this.storeCurrentPos()
-  let indent = this.curIndent, line = this.curLineStart
-  return this.parseExprOp(this.parseMaybeUnary(false), start, -1, noIn, indent, line)
-}
-
-lp.parseExprOp = function(left, start, minPrec, noIn, indent, line) {
-  if (this.curLineStart != line && this.curIndent < indent && this.tokenStartsLine()) return left
-  let prec = this.tok.type.binop
-  if (prec != null && (!noIn || this.tok.type !== tt._in)) {
-    if (prec > minPrec) {
-      let node = this.startNodeAt(start)
-      node.left = left
-      node.operator = this.tok.value
-      this.next()
-      if (this.curLineStart != line && this.curIndent < indent && this.tokenStartsLine()) {
-        node.right = this.dummyIdent()
-      } else {
-        let rightStart = this.storeCurrentPos()
-        node.right = this.parseExprOp(this.parseMaybeUnary(false), rightStart, prec, noIn, indent, line)
-      }
-      this.finishNode(node, /&&|\|\|/.test(node.operator) ? "LogicalExpression" : "BinaryExpression")
-      return this.parseExprOp(node, start, minPrec, noIn, indent, line)
-    }
-  }
-  return left
-}
-
-lp.parseMaybeUnary = function(sawUnary) {
-  let start = this.storeCurrentPos(), expr
-  if (this.options.ecmaVersion >= 8 && this.inAsync && this.toks.isContextual("await")) {
-    expr = this.parseAwait()
-    sawUnary = true
-  } else if (this.tok.type.prefix) {
-    let node = this.startNode(), update = this.tok.type === tt.incDec
-    if (!update) sawUnary = true
-    node.operator = this.tok.value
-    node.prefix = true
-    this.next()
-    node.argument = this.parseMaybeUnary(true)
-    if (update) node.argument = this.checkLVal(node.argument)
-    expr = this.finishNode(node, update ? "UpdateExpression" : "UnaryExpression")
-  } else if (this.tok.type === tt.ellipsis) {
-    let node = this.startNode()
-    this.next()
-    node.argument = this.parseMaybeUnary(sawUnary)
-    expr = this.finishNode(node, "SpreadElement")
-  } else {
-    expr = this.parseExprSubscripts()
-    while (this.tok.type.postfix && !this.canInsertSemicolon()) {
-      let node = this.startNodeAt(start)
-      node.operator = this.tok.value
-      node.prefix = false
-      node.argument = this.checkLVal(expr)
-      this.next()
-      expr = this.finishNode(node, "UpdateExpression")
-    }
-  }
-
-  if (!sawUnary && this.eat(tt.starstar)) {
-    let node = this.startNodeAt(start)
-    node.operator = "**"
-    node.left = expr
-    node.right = this.parseMaybeUnary(false)
-    return this.finishNode(node, "BinaryExpression")
-  }
-
-  return expr
-}
-
-lp.parseExprSubscripts = function() {
-  let start = this.storeCurrentPos()
-  return this.parseSubscripts(this.parseExprAtom(), start, false, this.curIndent, this.curLineStart)
-}
-
-lp.parseSubscripts = function(base, start, noCalls, startIndent, line) {
-  for (;;) {
-    if (this.curLineStart != line && this.curIndent <= startIndent && this.tokenStartsLine()) {
-      if (this.tok.type == tt.dot && this.curIndent == startIndent)
-        --startIndent
-      else
-        return base
-    }
-
-    let maybeAsyncArrow = base.type === "Identifier" && base.name === "async" && !this.canInsertSemicolon()
-
-    if (this.eat(tt.dot)) {
-      let node = this.startNodeAt(start)
-      node.object = base
-      if (this.curLineStart != line && this.curIndent <= startIndent && this.tokenStartsLine())
-        node.property = this.dummyIdent()
-      else
-        node.property = this.parsePropertyAccessor() || this.dummyIdent()
-      node.computed = false
-      base = this.finishNode(node, "MemberExpression")
-    } else if (this.tok.type == tt.bracketL) {
-      this.pushCx()
-      this.next()
-      let node = this.startNodeAt(start)
-      node.object = base
-      node.property = this.parseExpression()
-      node.computed = true
-      this.popCx()
-      this.expect(tt.bracketR)
-      base = this.finishNode(node, "MemberExpression")
-    } else if (!noCalls && this.tok.type == tt.parenL) {
-      let exprList = this.parseExprList(tt.parenR)
-      if (maybeAsyncArrow && this.eat(tt.arrow))
-        return this.parseArrowExpression(this.startNodeAt(start), exprList, true)
-      let node = this.startNodeAt(start)
-      node.callee = base
-      node.arguments = exprList
-      base = this.finishNode(node, "CallExpression")
-    } else if (this.tok.type == tt.backQuote) {
-      let node = this.startNodeAt(start)
-      node.tag = base
-      node.quasi = this.parseTemplate()
-      base = this.finishNode(node, "TaggedTemplateExpression")
-    } else {
-      return base
-    }
-  }
-}
-
-lp.parseExprAtom = function() {
-  let node
-  switch (this.tok.type) {
-  case tt._this:
-  case tt._super:
-    let type = this.tok.type === tt._this ? "ThisExpression" : "Super"
-    node = this.startNode()
-    this.next()
-    return this.finishNode(node, type)
-
-  case tt.name:
-    let start = this.storeCurrentPos()
-    let id = this.parseIdent()
-    let isAsync = false
-    if (id.name === "async" && !this.canInsertSemicolon()) {
-      if (this.eat(tt._function))
-        return this.parseFunction(this.startNodeAt(start), false, true)
-      if (this.tok.type === tt.name) {
-        id = this.parseIdent()
-        isAsync = true
-      }
-    }
-    return this.eat(tt.arrow) ? this.parseArrowExpression(this.startNodeAt(start), [id], isAsync) : id
-
-  case tt.regexp:
-    node = this.startNode()
-    let val = this.tok.value
-    node.regex = {pattern: val.pattern, flags: val.flags}
-    node.value = val.value
-    node.raw = this.input.slice(this.tok.start, this.tok.end)
-    this.next()
-    return this.finishNode(node, "Literal")
-
-  case tt.num: case tt.string:
-    node = this.startNode()
-    node.value = this.tok.value
-    node.raw = this.input.slice(this.tok.start, this.tok.end)
-    this.next()
-    return this.finishNode(node, "Literal")
-
-  case tt._null: case tt._true: case tt._false:
-    node = this.startNode()
-    node.value = this.tok.type === tt._null ? null : this.tok.type === tt._true
-    node.raw = this.tok.type.keyword
-    this.next()
-    return this.finishNode(node, "Literal")
-
-  case tt.parenL:
-    let parenStart = this.storeCurrentPos()
-    this.next()
-    let inner = this.parseExpression()
-    this.expect(tt.parenR)
-    if (this.eat(tt.arrow)) {
-      // (a,)=>a // SequenceExpression makes dummy in the last hole. Drop the dummy.
-      let params = inner.expressions || [inner]
-      if (params.length && isDummy(params[params.length - 1]))
-        params.pop()
-      return this.parseArrowExpression(this.startNodeAt(parenStart), params)
-    }
-    if (this.options.preserveParens) {
-      let par = this.startNodeAt(parenStart)
-      par.expression = inner
-      inner = this.finishNode(par, "ParenthesizedExpression")
-    }
-    return inner
-
-  case tt.bracketL:
-    node = this.startNode()
-    node.elements = this.parseExprList(tt.bracketR, true)
-    return this.finishNode(node, "ArrayExpression")
-
-  case tt.braceL:
-    return this.parseObj()
-
-  case tt._class:
-    return this.parseClass(false)
-
-  case tt._function:
-    node = this.startNode()
-    this.next()
-    return this.parseFunction(node, false)
-
-  case tt._new:
-    return this.parseNew()
-
-  case tt.backQuote:
-    return this.parseTemplate()
-
-  default:
-    return this.dummyIdent()
-  }
-}
-
-lp.parseNew = function() {
-  let node = this.startNode(), startIndent = this.curIndent, line = this.curLineStart
-  let meta = this.parseIdent(true)
-  if (this.options.ecmaVersion >= 6 && this.eat(tt.dot)) {
-    node.meta = meta
-    node.property = this.parseIdent(true)
-    return this.finishNode(node, "MetaProperty")
-  }
-  let start = this.storeCurrentPos()
-  node.callee = this.parseSubscripts(this.parseExprAtom(), start, true, startIndent, line)
-  if (this.tok.type == tt.parenL) {
-    node.arguments = this.parseExprList(tt.parenR)
-  } else {
-    node.arguments = []
-  }
-  return this.finishNode(node, "NewExpression")
-}
-
-lp.parseTemplateElement = function() {
-  let elem = this.startNode()
-  elem.value = {
-    raw: this.input.slice(this.tok.start, this.tok.end).replace(/\r\n?/g, "\n"),
-    cooked: this.tok.value
-  }
-  this.next()
-  elem.tail = this.tok.type === tt.backQuote
-  return this.finishNode(elem, "TemplateElement")
-}
-
-lp.parseTemplate = function() {
-  let node = this.startNode()
-  this.next()
-  node.expressions = []
-  let curElt = this.parseTemplateElement()
-  node.quasis = [curElt]
-  while (!curElt.tail) {
-    this.next()
-    node.expressions.push(this.parseExpression())
-    if (this.expect(tt.braceR)) {
-      curElt = this.parseTemplateElement()
-    } else {
-      curElt = this.startNode()
-      curElt.value = {cooked: "", raw: ""}
-      curElt.tail = true
-      this.finishNode(curElt, "TemplateElement")
-    }
-    node.quasis.push(curElt)
-  }
-  this.expect(tt.backQuote)
-  return this.finishNode(node, "TemplateLiteral")
-}
-
-lp.parseObj = function() {
-  let node = this.startNode()
-  node.properties = []
-  this.pushCx()
-  let indent = this.curIndent + 1, line = this.curLineStart
-  this.eat(tt.braceL)
-  if (this.curIndent + 1 < indent) { indent = this.curIndent; line = this.curLineStart }
-  while (!this.closes(tt.braceR, indent, line)) {
-    let prop = this.startNode(), isGenerator, isAsync, start
-    if (this.options.ecmaVersion >= 6) {
-      start = this.storeCurrentPos()
-      prop.method = false
-      prop.shorthand = false
-      isGenerator = this.eat(tt.star)
-    }
-    this.parsePropertyName(prop)
-    if (!prop.computed &&
-        prop.key.type === "Identifier" && prop.key.name === "async" && this.tok.type !== tt.parenL &&
-        this.tok.type !== tt.colon && !this.canInsertSemicolon()) {
-      this.parsePropertyName(prop)
-      isAsync = true
-    } else {
-      isAsync = false
-    }
-    if (isDummy(prop.key)) { if (isDummy(this.parseMaybeAssign())) this.next(); this.eat(tt.comma); continue }
-    if (this.eat(tt.colon)) {
-      prop.kind = "init"
-      prop.value = this.parseMaybeAssign()
-    } else if (this.options.ecmaVersion >= 6 && (this.tok.type === tt.parenL || this.tok.type === tt.braceL)) {
-      prop.kind = "init"
-      prop.method = true
-      prop.value = this.parseMethod(isGenerator, isAsync)
-    } else if (this.options.ecmaVersion >= 5 && prop.key.type === "Identifier" &&
-               !prop.computed && (prop.key.name === "get" || prop.key.name === "set") &&
-               (this.tok.type != tt.comma && this.tok.type != tt.braceR)) {
-      prop.kind = prop.key.name
-      this.parsePropertyName(prop)
-      prop.value = this.parseMethod(false)
-    } else {
-      prop.kind = "init"
-      if (this.options.ecmaVersion >= 6) {
-        if (this.eat(tt.eq)) {
-          let assign = this.startNodeAt(start)
-          assign.operator = "="
-          assign.left = prop.key
-          assign.right = this.parseMaybeAssign()
-          prop.value = this.finishNode(assign, "AssignmentExpression")
-        } else {
-          prop.value = prop.key
-        }
-      } else {
-        prop.value = this.dummyIdent()
-      }
-      prop.shorthand = true
-    }
-    node.properties.push(this.finishNode(prop, "Property"))
-    this.eat(tt.comma)
-  }
-  this.popCx()
-  if (!this.eat(tt.braceR)) {
-    // If there is no closing brace, make the node span to the start
-    // of the next token (this is useful for Tern)
-    this.last.end = this.tok.start
-    if (this.options.locations) this.last.loc.end = this.tok.loc.start
-  }
-  return this.finishNode(node, "ObjectExpression")
-}
-
-lp.parsePropertyName = function(prop) {
-  if (this.options.ecmaVersion >= 6) {
-    if (this.eat(tt.bracketL)) {
-      prop.computed = true
-      prop.key = this.parseExpression()
-      this.expect(tt.bracketR)
-      return
-    } else {
-      prop.computed = false
-    }
-  }
-  let key = (this.tok.type === tt.num || this.tok.type === tt.string) ? this.parseExprAtom() : this.parseIdent()
-  prop.key = key || this.dummyIdent()
-}
-
-lp.parsePropertyAccessor = function() {
-  if (this.tok.type === tt.name || this.tok.type.keyword) return this.parseIdent()
-}
-
-lp.parseIdent = function() {
-  let name = this.tok.type === tt.name ? this.tok.value : this.tok.type.keyword
-  if (!name) return this.dummyIdent()
-  let node = this.startNode()
-  this.next()
-  node.name = name
-  return this.finishNode(node, "Identifier")
-}
-
-lp.initFunction = function(node) {
-  node.id = null
-  node.params = []
-  if (this.options.ecmaVersion >= 6) {
-    node.generator = false
-    node.expression = false
-  }
-  if (this.options.ecmaVersion >= 8)
-    node.async = false
-}
-
-// Convert existing expression atom to assignable pattern
-// if possible.
-
-lp.toAssignable = function(node, binding) {
-  if (!node || node.type == "Identifier" || (node.type == "MemberExpression" && !binding)) {
-    // Okay
-  } else if (node.type == "ParenthesizedExpression") {
-    node.expression = this.toAssignable(node.expression, binding)
-  } else if (this.options.ecmaVersion < 6) {
-    return this.dummyIdent()
-  } else if (node.type == "ObjectExpression") {
-    node.type = "ObjectPattern"
-    let props = node.properties
-    for (let i = 0; i < props.length; i++)
-      props[i].value = this.toAssignable(props[i].value, binding)
-  } else if (node.type == "ArrayExpression") {
-    node.type = "ArrayPattern"
-    this.toAssignableList(node.elements, binding)
-  } else if (node.type == "SpreadElement") {
-    node.type = "RestElement"
-    node.argument = this.toAssignable(node.argument, binding)
-  } else if (node.type == "AssignmentExpression") {
-    node.type = "AssignmentPattern"
-    delete node.operator
-  } else {
-    return this.dummyIdent()
-  }
-  return node
-}
-
-lp.toAssignableList = function(exprList, binding) {
-  for (let i = 0; i < exprList.length; i++)
-    exprList[i] = this.toAssignable(exprList[i], binding)
-  return exprList
-}
-
-lp.parseFunctionParams = function(params) {
-  params = this.parseExprList(tt.parenR)
-  return this.toAssignableList(params, true)
-}
-
-lp.parseMethod = function(isGenerator, isAsync) {
-  let node = this.startNode(), oldInAsync = this.inAsync
-  this.initFunction(node)
-  if (this.options.ecmaVersion >= 6)
-    node.generator = !!isGenerator
-  if (this.options.ecmaVersion >= 8)
-    node.async = !!isAsync
-  this.inAsync = node.async
-  node.params = this.parseFunctionParams()
-  node.expression = this.options.ecmaVersion >= 6 && this.tok.type !== tt.braceL
-  node.body = node.expression ? this.parseMaybeAssign() : this.parseBlock()
-  this.inAsync = oldInAsync
-  return this.finishNode(node, "FunctionExpression")
-}
-
-lp.parseArrowExpression = function(node, params, isAsync) {
-  let oldInAsync = this.inAsync
-  this.initFunction(node)
-  if (this.options.ecmaVersion >= 8)
-    node.async = !!isAsync
-  this.inAsync = node.async
-  node.params = this.toAssignableList(params, true)
-  node.expression = this.tok.type !== tt.braceL
-  node.body = node.expression ? this.parseMaybeAssign() : this.parseBlock()
-  this.inAsync = oldInAsync
-  return this.finishNode(node, "ArrowFunctionExpression")
-}
-
-lp.parseExprList = function(close, allowEmpty) {
-  this.pushCx()
-  let indent = this.curIndent, line = this.curLineStart, elts = []
-  this.next() // Opening bracket
-  while (!this.closes(close, indent + 1, line)) {
-    if (this.eat(tt.comma)) {
-      elts.push(allowEmpty ? null : this.dummyIdent())
-      continue
-    }
-    let elt = this.parseMaybeAssign()
-    if (isDummy(elt)) {
-      if (this.closes(close, indent, line)) break
-      this.next()
-    } else {
-      elts.push(elt)
-    }
-    this.eat(tt.comma)
-  }
-  this.popCx()
-  if (!this.eat(close)) {
-    // If there is no closing brace, make the node span to the start
-    // of the next token (this is useful for Tern)
-    this.last.end = this.tok.start
-    if (this.options.locations) this.last.loc.end = this.tok.loc.start
-  }
-  return elts
-}
-
-lp.parseAwait = function() {
-  let node = this.startNode()
-  this.next()
-  node.argument = this.parseMaybeUnary()
-  return this.finishNode(node, "AwaitExpression")
-}
diff --git a/node_modules/acorn/src/loose/index.js b/node_modules/acorn/src/loose/index.js
deleted file mode 100644
index daf7bf2d7..000000000
--- a/node_modules/acorn/src/loose/index.js
+++ /dev/null
@@ -1,49 +0,0 @@
-// Acorn: Loose parser
-//
-// This module provides an alternative parser (`parse_dammit`) that
-// exposes that same interface as `parse`, but will try to parse
-// anything as JavaScript, repairing syntax error the best it can.
-// There are circumstances in which it will raise an error and give
-// up, but they are very rare. The resulting AST will be a mostly
-// valid JavaScript AST (as per the [Mozilla parser API][api], except
-// that:
-//
-// - Return outside functions is allowed
-//
-// - Label consistency (no conflicts, break only to existing labels)
-//   is not enforced.
-//
-// - Bogus Identifier nodes with a name of `"✖"` are inserted whenever
-//   the parser got too confused to return anything meaningful.
-//
-// [api]: https://developer.mozilla.org/en-US/docs/SpiderMonkey/Parser_API
-//
-// The expected use for this is to *first* try `acorn.parse`, and only
-// if that fails switch to `parse_dammit`. The loose parser might
-// parse badly indented code incorrectly, so **don't** use it as
-// your default parser.
-//
-// Quite a lot of acorn.js is duplicated here. The alternative was to
-// add a *lot* of extra cruft to that file, making it less readable
-// and slower. Copying and editing the code allowed me to make
-// invasive changes and simplifications without creating a complicated
-// tangle.
-
-import {addLooseExports, defaultOptions} from "../index"
-import {LooseParser, pluginsLoose} from "./state"
-import "./tokenize"
-import "./statement"
-import "./expression"
-
-export {LooseParser, pluginsLoose} from "./state"
-
-defaultOptions.tabSize = 4
-
-// eslint-disable-next-line camelcase
-export function parse_dammit(input, options) {
-  let p = new LooseParser(input, options)
-  p.next()
-  return p.parseTopLevel()
-}
-
-addLooseExports(parse_dammit, LooseParser, pluginsLoose)
diff --git a/node_modules/acorn/src/loose/parseutil.js b/node_modules/acorn/src/loose/parseutil.js
deleted file mode 100644
index b620fdaf0..000000000
--- a/node_modules/acorn/src/loose/parseutil.js
+++ /dev/null
@@ -1 +0,0 @@
-export function isDummy(node) { return node.name == "✖" }
diff --git a/node_modules/acorn/src/loose/state.js b/node_modules/acorn/src/loose/state.js
deleted file mode 100644
index 18987aa22..000000000
--- a/node_modules/acorn/src/loose/state.js
+++ /dev/null
@@ -1,161 +0,0 @@
-import {tokenizer, SourceLocation, tokTypes as tt, Node, lineBreak, isNewLine} from "../index"
-
-// Registered plugins
-export const pluginsLoose = {}
-
-export class LooseParser {
-  constructor(input, options = {}) {
-    this.toks = tokenizer(input, options)
-    this.options = this.toks.options
-    this.input = this.toks.input
-    this.tok = this.last = {type: tt.eof, start: 0, end: 0}
-    if (this.options.locations) {
-      let here = this.toks.curPosition()
-      this.tok.loc = new SourceLocation(this.toks, here, here)
-    }
-    this.ahead = [] // Tokens ahead
-    this.context = [] // Indentation contexted
-    this.curIndent = 0
-    this.curLineStart = 0
-    this.nextLineStart = this.lineEnd(this.curLineStart) + 1
-    this.inAsync = false
-    // Load plugins
-    this.options.pluginsLoose = options.pluginsLoose || {}
-    this.loadPlugins(this.options.pluginsLoose)
-  }
-
-  startNode() {
-    return new Node(this.toks, this.tok.start, this.options.locations ? this.tok.loc.start : null)
-  }
-
-  storeCurrentPos() {
-    return this.options.locations ? [this.tok.start, this.tok.loc.start] : this.tok.start
-  }
-
-  startNodeAt(pos) {
-    if (this.options.locations) {
-      return new Node(this.toks, pos[0], pos[1])
-    } else {
-      return new Node(this.toks, pos)
-    }
-  }
-
-  finishNode(node, type) {
-    node.type = type
-    node.end = this.last.end
-    if (this.options.locations)
-      node.loc.end = this.last.loc.end
-    if (this.options.ranges)
-      node.range[1] = this.last.end
-    return node
-  }
-
-  dummyNode(type) {
-    let dummy = this.startNode()
-    dummy.type = type
-    dummy.end = dummy.start
-    if (this.options.locations)
-      dummy.loc.end = dummy.loc.start
-    if (this.options.ranges)
-      dummy.range[1] = dummy.start
-    this.last = {type: tt.name, start: dummy.start, end: dummy.start, loc: dummy.loc}
-    return dummy
-  }
-
-  dummyIdent() {
-    let dummy = this.dummyNode("Identifier")
-    dummy.name = "✖"
-    return dummy
-  }
-
-  dummyString() {
-    let dummy = this.dummyNode("Literal")
-    dummy.value = dummy.raw = "✖"
-    return dummy
-  }
-
-  eat(type) {
-    if (this.tok.type === type) {
-      this.next()
-      return true
-    } else {
-      return false
-    }
-  }
-
-  isContextual(name) {
-    return this.tok.type === tt.name && this.tok.value === name
-  }
-
-  eatContextual(name) {
-    return this.tok.value === name && this.eat(tt.name)
-  }
-
-  canInsertSemicolon() {
-    return this.tok.type === tt.eof || this.tok.type === tt.braceR ||
-      lineBreak.test(this.input.slice(this.last.end, this.tok.start))
-  }
-
-  semicolon() {
-    return this.eat(tt.semi)
-  }
-
-  expect(type) {
-    if (this.eat(type)) return true
-    for (let i = 1; i <= 2; i++) {
-      if (this.lookAhead(i).type == type) {
-        for (let j = 0; j < i; j++) this.next()
-        return true
-      }
-    }
-  }
-
-  pushCx() {
-    this.context.push(this.curIndent)
-  }
-
-  popCx() {
-    this.curIndent = this.context.pop()
-  }
-
-  lineEnd(pos) {
-    while (pos < this.input.length && !isNewLine(this.input.charCodeAt(pos))) ++pos
-    return pos
-  }
-
-  indentationAfter(pos) {
-    for (let count = 0;; ++pos) {
-      let ch = this.input.charCodeAt(pos)
-      if (ch === 32) ++count
-      else if (ch === 9) count += this.options.tabSize
-      else return count
-    }
-  }
-
-  closes(closeTok, indent, line, blockHeuristic) {
-    if (this.tok.type === closeTok || this.tok.type === tt.eof) return true
-    return line != this.curLineStart && this.curIndent < indent && this.tokenStartsLine() &&
-      (!blockHeuristic || this.nextLineStart >= this.input.length ||
-       this.indentationAfter(this.nextLineStart) < indent)
-  }
-
-  tokenStartsLine() {
-    for (let p = this.tok.start - 1; p >= this.curLineStart; --p) {
-      let ch = this.input.charCodeAt(p)
-      if (ch !== 9 && ch !== 32) return false
-    }
-    return true
-  }
-
-  extend(name, f) {
-    this[name] = f(this[name])
-  }
-
-  loadPlugins(pluginConfigs) {
-    for (let name in pluginConfigs) {
-      let plugin = pluginsLoose[name]
-      if (!plugin) throw new Error("Plugin '" + name + "' not found")
-      plugin(this, pluginConfigs[name])
-    }
-  }
-}
diff --git a/node_modules/acorn/src/loose/statement.js b/node_modules/acorn/src/loose/statement.js
deleted file mode 100644
index 192df43e0..000000000
--- a/node_modules/acorn/src/loose/statement.js
+++ /dev/null
@@ -1,448 +0,0 @@
-import {LooseParser} from "./state"
-import {isDummy} from "./parseutil"
-import {getLineInfo, tokTypes as tt} from "../index"
-
-const lp = LooseParser.prototype
-
-lp.parseTopLevel = function() {
-  let node = this.startNodeAt(this.options.locations ? [0, getLineInfo(this.input, 0)] : 0)
-  node.body = []
-  while (this.tok.type !== tt.eof) node.body.push(this.parseStatement())
-  this.last = this.tok
-  if (this.options.ecmaVersion >= 6) {
-    node.sourceType = this.options.sourceType
-  }
-  return this.finishNode(node, "Program")
-}
-
-lp.parseStatement = function() {
-  let starttype = this.tok.type, node = this.startNode(), kind
-
-  if (this.toks.isLet()) {
-    starttype = tt._var
-    kind = "let"
-  }
-
-  switch (starttype) {
-  case tt._break: case tt._continue:
-    this.next()
-    let isBreak = starttype === tt._break
-    if (this.semicolon() || this.canInsertSemicolon()) {
-      node.label = null
-    } else {
-      node.label = this.tok.type === tt.name ? this.parseIdent() : null
-      this.semicolon()
-    }
-    return this.finishNode(node, isBreak ? "BreakStatement" : "ContinueStatement")
-
-  case tt._debugger:
-    this.next()
-    this.semicolon()
-    return this.finishNode(node, "DebuggerStatement")
-
-  case tt._do:
-    this.next()
-    node.body = this.parseStatement()
-    node.test = this.eat(tt._while) ? this.parseParenExpression() : this.dummyIdent()
-    this.semicolon()
-    return this.finishNode(node, "DoWhileStatement")
-
-  case tt._for:
-    this.next()
-    this.pushCx()
-    this.expect(tt.parenL)
-    if (this.tok.type === tt.semi) return this.parseFor(node, null)
-    let isLet = this.toks.isLet()
-    if (isLet || this.tok.type === tt._var || this.tok.type === tt._const) {
-      let init = this.parseVar(true, isLet ? "let" : this.tok.value)
-      if (init.declarations.length === 1 && (this.tok.type === tt._in || this.isContextual("of"))) {
-        return this.parseForIn(node, init)
-      }
-      return this.parseFor(node, init)
-    }
-    let init = this.parseExpression(true)
-    if (this.tok.type === tt._in || this.isContextual("of"))
-      return this.parseForIn(node, this.toAssignable(init))
-    return this.parseFor(node, init)
-
-  case tt._function:
-    this.next()
-    return this.parseFunction(node, true)
-
-  case tt._if:
-    this.next()
-    node.test = this.parseParenExpression()
-    node.consequent = this.parseStatement()
-    node.alternate = this.eat(tt._else) ? this.parseStatement() : null
-    return this.finishNode(node, "IfStatement")
-
-  case tt._return:
-    this.next()
-    if (this.eat(tt.semi) || this.canInsertSemicolon()) node.argument = null
-    else { node.argument = this.parseExpression(); this.semicolon() }
-    return this.finishNode(node, "ReturnStatement")
-
-  case tt._switch:
-    let blockIndent = this.curIndent, line = this.curLineStart
-    this.next()
-    node.discriminant = this.parseParenExpression()
-    node.cases = []
-    this.pushCx()
-    this.expect(tt.braceL)
-
-    let cur
-    while (!this.closes(tt.braceR, blockIndent, line, true)) {
-      if (this.tok.type === tt._case || this.tok.type === tt._default) {
-        let isCase = this.tok.type === tt._case
-        if (cur) this.finishNode(cur, "SwitchCase")
-        node.cases.push(cur = this.startNode())
-        cur.consequent = []
-        this.next()
-        if (isCase) cur.test = this.parseExpression()
-        else cur.test = null
-        this.expect(tt.colon)
-      } else {
-        if (!cur) {
-          node.cases.push(cur = this.startNode())
-          cur.consequent = []
-          cur.test = null
-        }
-        cur.consequent.push(this.parseStatement())
-      }
-    }
-    if (cur) this.finishNode(cur, "SwitchCase")
-    this.popCx()
-    this.eat(tt.braceR)
-    return this.finishNode(node, "SwitchStatement")
-
-  case tt._throw:
-    this.next()
-    node.argument = this.parseExpression()
-    this.semicolon()
-    return this.finishNode(node, "ThrowStatement")
-
-  case tt._try:
-    this.next()
-    node.block = this.parseBlock()
-    node.handler = null
-    if (this.tok.type === tt._catch) {
-      let clause = this.startNode()
-      this.next()
-      this.expect(tt.parenL)
-      clause.param = this.toAssignable(this.parseExprAtom(), true)
-      this.expect(tt.parenR)
-      clause.body = this.parseBlock()
-      node.handler = this.finishNode(clause, "CatchClause")
-    }
-    node.finalizer = this.eat(tt._finally) ? this.parseBlock() : null
-    if (!node.handler && !node.finalizer) return node.block
-    return this.finishNode(node, "TryStatement")
-
-  case tt._var:
-  case tt._const:
-    return this.parseVar(false, kind || this.tok.value)
-
-  case tt._while:
-    this.next()
-    node.test = this.parseParenExpression()
-    node.body = this.parseStatement()
-    return this.finishNode(node, "WhileStatement")
-
-  case tt._with:
-    this.next()
-    node.object = this.parseParenExpression()
-    node.body = this.parseStatement()
-    return this.finishNode(node, "WithStatement")
-
-  case tt.braceL:
-    return this.parseBlock()
-
-  case tt.semi:
-    this.next()
-    return this.finishNode(node, "EmptyStatement")
-
-  case tt._class:
-    return this.parseClass(true)
-
-  case tt._import:
-    return this.parseImport()
-
-  case tt._export:
-    return this.parseExport()
-
-  default:
-    if (this.toks.isAsyncFunction()) {
-      this.next()
-      this.next()
-      return this.parseFunction(node, true, true)
-    }
-    let expr = this.parseExpression()
-    if (isDummy(expr)) {
-      this.next()
-      if (this.tok.type === tt.eof) return this.finishNode(node, "EmptyStatement")
-      return this.parseStatement()
-    } else if (starttype === tt.name && expr.type === "Identifier" && this.eat(tt.colon)) {
-      node.body = this.parseStatement()
-      node.label = expr
-      return this.finishNode(node, "LabeledStatement")
-    } else {
-      node.expression = expr
-      this.semicolon()
-      return this.finishNode(node, "ExpressionStatement")
-    }
-  }
-}
-
-lp.parseBlock = function() {
-  let node = this.startNode()
-  this.pushCx()
-  this.expect(tt.braceL)
-  let blockIndent = this.curIndent, line = this.curLineStart
-  node.body = []
-  while (!this.closes(tt.braceR, blockIndent, line, true))
-    node.body.push(this.parseStatement())
-  this.popCx()
-  this.eat(tt.braceR)
-  return this.finishNode(node, "BlockStatement")
-}
-
-lp.parseFor = function(node, init) {
-  node.init = init
-  node.test = node.update = null
-  if (this.eat(tt.semi) && this.tok.type !== tt.semi) node.test = this.parseExpression()
-  if (this.eat(tt.semi) && this.tok.type !== tt.parenR) node.update = this.parseExpression()
-  this.popCx()
-  this.expect(tt.parenR)
-  node.body = this.parseStatement()
-  return this.finishNode(node, "ForStatement")
-}
-
-lp.parseForIn = function(node, init) {
-  let type = this.tok.type === tt._in ? "ForInStatement" : "ForOfStatement"
-  this.next()
-  node.left = init
-  node.right = this.parseExpression()
-  this.popCx()
-  this.expect(tt.parenR)
-  node.body = this.parseStatement()
-  return this.finishNode(node, type)
-}
-
-lp.parseVar = function(noIn, kind) {
-  let node = this.startNode()
-  node.kind = kind
-  this.next()
-  node.declarations = []
-  do {
-    let decl = this.startNode()
-    decl.id = this.options.ecmaVersion >= 6 ? this.toAssignable(this.parseExprAtom(), true) : this.parseIdent()
-    decl.init = this.eat(tt.eq) ? this.parseMaybeAssign(noIn) : null
-    node.declarations.push(this.finishNode(decl, "VariableDeclarator"))
-  } while (this.eat(tt.comma))
-  if (!node.declarations.length) {
-    let decl = this.startNode()
-    decl.id = this.dummyIdent()
-    node.declarations.push(this.finishNode(decl, "VariableDeclarator"))
-  }
-  if (!noIn) this.semicolon()
-  return this.finishNode(node, "VariableDeclaration")
-}
-
-lp.parseClass = function(isStatement) {
-  let node = this.startNode()
-  this.next()
-  if (this.tok.type === tt.name) node.id = this.parseIdent()
-  else if (isStatement === true) node.id = this.dummyIdent()
-  else node.id = null
-  node.superClass = this.eat(tt._extends) ? this.parseExpression() : null
-  node.body = this.startNode()
-  node.body.body = []
-  this.pushCx()
-  let indent = this.curIndent + 1, line = this.curLineStart
-  this.eat(tt.braceL)
-  if (this.curIndent + 1 < indent) { indent = this.curIndent; line = this.curLineStart }
-  while (!this.closes(tt.braceR, indent, line)) {
-    if (this.semicolon()) continue
-    let method = this.startNode(), isGenerator, isAsync
-    if (this.options.ecmaVersion >= 6) {
-      method.static = false
-      isGenerator = this.eat(tt.star)
-    }
-    this.parsePropertyName(method)
-    if (isDummy(method.key)) { if (isDummy(this.parseMaybeAssign())) this.next(); this.eat(tt.comma); continue }
-    if (method.key.type === "Identifier" && !method.computed && method.key.name === "static" &&
-        (this.tok.type != tt.parenL && this.tok.type != tt.braceL)) {
-      method.static = true
-      isGenerator = this.eat(tt.star)
-      this.parsePropertyName(method)
-    } else {
-      method.static = false
-    }
-    if (!method.computed &&
-        method.key.type === "Identifier" && method.key.name === "async" && this.tok.type !== tt.parenL &&
-        !this.canInsertSemicolon()) {
-      this.parsePropertyName(method)
-      isAsync = true
-    } else {
-      isAsync = false
-    }
-    if (this.options.ecmaVersion >= 5 && method.key.type === "Identifier" &&
-        !method.computed && (method.key.name === "get" || method.key.name === "set") &&
-        this.tok.type !== tt.parenL && this.tok.type !== tt.braceL) {
-      method.kind = method.key.name
-      this.parsePropertyName(method)
-      method.value = this.parseMethod(false)
-    } else {
-      if (!method.computed && !method.static && !isGenerator && !isAsync && (
-        method.key.type === "Identifier" && method.key.name === "constructor" ||
-          method.key.type === "Literal" && method.key.value === "constructor")) {
-        method.kind = "constructor"
-      } else {
-        method.kind = "method"
-      }
-      method.value = this.parseMethod(isGenerator, isAsync)
-    }
-    node.body.body.push(this.finishNode(method, "MethodDefinition"))
-  }
-  this.popCx()
-  if (!this.eat(tt.braceR)) {
-    // If there is no closing brace, make the node span to the start
-    // of the next token (this is useful for Tern)
-    this.last.end = this.tok.start
-    if (this.options.locations) this.last.loc.end = this.tok.loc.start
-  }
-  this.semicolon()
-  this.finishNode(node.body, "ClassBody")
-  return this.finishNode(node, isStatement ? "ClassDeclaration" : "ClassExpression")
-}
-
-lp.parseFunction = function(node, isStatement, isAsync) {
-  let oldInAsync = this.inAsync
-  this.initFunction(node)
-  if (this.options.ecmaVersion >= 6) {
-    node.generator = this.eat(tt.star)
-  }
-  if (this.options.ecmaVersion >= 8) {
-    node.async = !!isAsync
-  }
-  if (this.tok.type === tt.name) node.id = this.parseIdent()
-  else if (isStatement === true) node.id = this.dummyIdent()
-  this.inAsync = node.async
-  node.params = this.parseFunctionParams()
-  node.body = this.parseBlock()
-  this.inAsync = oldInAsync
-  return this.finishNode(node, isStatement ? "FunctionDeclaration" : "FunctionExpression")
-}
-
-lp.parseExport = function() {
-  let node = this.startNode()
-  this.next()
-  if (this.eat(tt.star)) {
-    node.source = this.eatContextual("from") ? this.parseExprAtom() : this.dummyString()
-    return this.finishNode(node, "ExportAllDeclaration")
-  }
-  if (this.eat(tt._default)) {
-    // export default (function foo() {}) // This is FunctionExpression.
-    let isAsync
-    if (this.tok.type === tt._function || (isAsync = this.toks.isAsyncFunction())) {
-      let fNode = this.startNode()
-      this.next()
-      if (isAsync) this.next()
-      node.declaration = this.parseFunction(fNode, "nullableID", isAsync)
-    } else if (this.tok.type === tt._class) {
-      node.declaration = this.parseClass("nullableID")
-    } else {
-      node.declaration = this.parseMaybeAssign()
-      this.semicolon()
-    }
-    return this.finishNode(node, "ExportDefaultDeclaration")
-  }
-  if (this.tok.type.keyword || this.toks.isLet() || this.toks.isAsyncFunction()) {
-    node.declaration = this.parseStatement()
-    node.specifiers = []
-    node.source = null
-  } else {
-    node.declaration = null
-    node.specifiers = this.parseExportSpecifierList()
-    node.source = this.eatContextual("from") ? this.parseExprAtom() : null
-    this.semicolon()
-  }
-  return this.finishNode(node, "ExportNamedDeclaration")
-}
-
-lp.parseImport = function() {
-  let node = this.startNode()
-  this.next()
-  if (this.tok.type === tt.string) {
-    node.specifiers = []
-    node.source = this.parseExprAtom()
-    node.kind = ""
-  } else {
-    let elt
-    if (this.tok.type === tt.name && this.tok.value !== "from") {
-      elt = this.startNode()
-      elt.local = this.parseIdent()
-      this.finishNode(elt, "ImportDefaultSpecifier")
-      this.eat(tt.comma)
-    }
-    node.specifiers = this.parseImportSpecifierList()
-    node.source = this.eatContextual("from") && this.tok.type == tt.string ? this.parseExprAtom() : this.dummyString()
-    if (elt) node.specifiers.unshift(elt)
-  }
-  this.semicolon()
-  return this.finishNode(node, "ImportDeclaration")
-}
-
-lp.parseImportSpecifierList = function() {
-  let elts = []
-  if (this.tok.type === tt.star) {
-    let elt = this.startNode()
-    this.next()
-    elt.local = this.eatContextual("as") ? this.parseIdent() : this.dummyIdent()
-    elts.push(this.finishNode(elt, "ImportNamespaceSpecifier"))
-  } else {
-    let indent = this.curIndent, line = this.curLineStart, continuedLine = this.nextLineStart
-    this.pushCx()
-    this.eat(tt.braceL)
-    if (this.curLineStart > continuedLine) continuedLine = this.curLineStart
-    while (!this.closes(tt.braceR, indent + (this.curLineStart <= continuedLine ? 1 : 0), line)) {
-      let elt = this.startNode()
-      if (this.eat(tt.star)) {
-        elt.local = this.eatContextual("as") ? this.parseIdent() : this.dummyIdent()
-        this.finishNode(elt, "ImportNamespaceSpecifier")
-      } else {
-        if (this.isContextual("from")) break
-        elt.imported = this.parseIdent()
-        if (isDummy(elt.imported)) break
-        elt.local = this.eatContextual("as") ? this.parseIdent() : elt.imported
-        this.finishNode(elt, "ImportSpecifier")
-      }
-      elts.push(elt)
-      this.eat(tt.comma)
-    }
-    this.eat(tt.braceR)
-    this.popCx()
-  }
-  return elts
-}
-
-lp.parseExportSpecifierList = function() {
-  let elts = []
-  let indent = this.curIndent, line = this.curLineStart, continuedLine = this.nextLineStart
-  this.pushCx()
-  this.eat(tt.braceL)
-  if (this.curLineStart > continuedLine) continuedLine = this.curLineStart
-  while (!this.closes(tt.braceR, indent + (this.curLineStart <= continuedLine ? 1 : 0), line)) {
-    if (this.isContextual("from")) break
-    let elt = this.startNode()
-    elt.local = this.parseIdent()
-    if (isDummy(elt.local)) break
-    elt.exported = this.eatContextual("as") ? this.parseIdent() : elt.local
-    this.finishNode(elt, "ExportSpecifier")
-    elts.push(elt)
-    this.eat(tt.comma)
-  }
-  this.eat(tt.braceR)
-  this.popCx()
-  return elts
-}
diff --git a/node_modules/acorn/src/loose/tokenize.js b/node_modules/acorn/src/loose/tokenize.js
deleted file mode 100644
index 2d5130b63..000000000
--- a/node_modules/acorn/src/loose/tokenize.js
+++ /dev/null
@@ -1,111 +0,0 @@
-import {tokTypes as tt, Token, isNewLine, SourceLocation, getLineInfo, lineBreakG} from "../index"
-import {LooseParser} from "./state"
-
-const lp = LooseParser.prototype
-
-function isSpace(ch) {
-  return (ch < 14 && ch > 8) || ch === 32 || ch === 160 || isNewLine(ch)
-}
-
-lp.next = function() {
-  this.last = this.tok
-  if (this.ahead.length)
-    this.tok = this.ahead.shift()
-  else
-    this.tok = this.readToken()
-
-  if (this.tok.start >= this.nextLineStart) {
-    while (this.tok.start >= this.nextLineStart) {
-      this.curLineStart = this.nextLineStart
-      this.nextLineStart = this.lineEnd(this.curLineStart) + 1
-    }
-    this.curIndent = this.indentationAfter(this.curLineStart)
-  }
-}
-
-lp.readToken = function() {
-  for (;;) {
-    try {
-      this.toks.next()
-      if (this.toks.type === tt.dot &&
-          this.input.substr(this.toks.end, 1) === "." &&
-          this.options.ecmaVersion >= 6) {
-        this.toks.end++
-        this.toks.type = tt.ellipsis
-      }
-      return new Token(this.toks)
-    } catch (e) {
-      if (!(e instanceof SyntaxError)) throw e
-
-      // Try to skip some text, based on the error message, and then continue
-      let msg = e.message, pos = e.raisedAt, replace = true
-      if (/unterminated/i.test(msg)) {
-        pos = this.lineEnd(e.pos + 1)
-        if (/string/.test(msg)) {
-          replace = {start: e.pos, end: pos, type: tt.string, value: this.input.slice(e.pos + 1, pos)}
-        } else if (/regular expr/i.test(msg)) {
-          let re = this.input.slice(e.pos, pos)
-          try { re = new RegExp(re) } catch (e) { /* ignore compilation error due to new syntax */ }
-          replace = {start: e.pos, end: pos, type: tt.regexp, value: re}
-        } else if (/template/.test(msg)) {
-          replace = {
-            start: e.pos,
-            end: pos,
-            type: tt.template,
-            value: this.input.slice(e.pos, pos)
-          }
-        } else {
-          replace = false
-        }
-      } else if (/invalid (unicode|regexp|number)|expecting unicode|octal literal|is reserved|directly after number|expected number in radix/i.test(msg)) {
-        while (pos < this.input.length && !isSpace(this.input.charCodeAt(pos))) ++pos
-      } else if (/character escape|expected hexadecimal/i.test(msg)) {
-        while (pos < this.input.length) {
-          let ch = this.input.charCodeAt(pos++)
-          if (ch === 34 || ch === 39 || isNewLine(ch)) break
-        }
-      } else if (/unexpected character/i.test(msg)) {
-        pos++
-        replace = false
-      } else if (/regular expression/i.test(msg)) {
-        replace = true
-      } else {
-        throw e
-      }
-      this.resetTo(pos)
-      if (replace === true) replace = {start: pos, end: pos, type: tt.name, value: "✖"}
-      if (replace) {
-        if (this.options.locations)
-          replace.loc = new SourceLocation(
-            this.toks,
-            getLineInfo(this.input, replace.start),
-            getLineInfo(this.input, replace.end))
-        return replace
-      }
-    }
-  }
-}
-
-lp.resetTo = function(pos) {
-  this.toks.pos = pos
-  let ch = this.input.charAt(pos - 1)
-  this.toks.exprAllowed = !ch || /[[{(,;:?/*=+\-~!|&%^<>]/.test(ch) ||
-    /[enwfd]/.test(ch) &&
-    /\b(keywords|case|else|return|throw|new|in|(instance|type)of|delete|void)$/.test(this.input.slice(pos - 10, pos))
-
-  if (this.options.locations) {
-    this.toks.curLine = 1
-    this.toks.lineStart = lineBreakG.lastIndex = 0
-    let match
-    while ((match = lineBreakG.exec(this.input)) && match.index < pos) {
-      ++this.toks.curLine
-      this.toks.lineStart = match.index + match[0].length
-    }
-  }
-}
-
-lp.lookAhead = function(n) {
-  while (n > this.ahead.length)
-    this.ahead.push(this.readToken())
-  return this.ahead[n - 1]
-}
diff --git a/node_modules/acorn/src/lval.js b/node_modules/acorn/src/lval.js
deleted file mode 100644
index 815d9966a..000000000
--- a/node_modules/acorn/src/lval.js
+++ /dev/null
@@ -1,236 +0,0 @@
-import {types as tt} from "./tokentype"
-import {Parser} from "./state"
-import {has} from "./util"
-
-const pp = Parser.prototype
-
-// Convert existing expression atom to assignable pattern
-// if possible.
-
-pp.toAssignable = function(node, isBinding) {
-  if (this.options.ecmaVersion >= 6 && node) {
-    switch (node.type) {
-    case "Identifier":
-      if (this.inAsync && node.name === "await")
-        this.raise(node.start, "Can not use 'await' as identifier inside an async function")
-      break
-
-    case "ObjectPattern":
-    case "ArrayPattern":
-      break
-
-    case "ObjectExpression":
-      node.type = "ObjectPattern"
-      for (let i = 0; i < node.properties.length; i++) {
-        let prop = node.properties[i]
-        if (prop.kind !== "init") this.raise(prop.key.start, "Object pattern can't contain getter or setter")
-        this.toAssignable(prop.value, isBinding)
-      }
-      break
-
-    case "ArrayExpression":
-      node.type = "ArrayPattern"
-      this.toAssignableList(node.elements, isBinding)
-      break
-
-    case "AssignmentExpression":
-      if (node.operator === "=") {
-        node.type = "AssignmentPattern"
-        delete node.operator
-        this.toAssignable(node.left, isBinding)
-        // falls through to AssignmentPattern
-      } else {
-        this.raise(node.left.end, "Only '=' operator can be used for specifying default value.")
-        break
-      }
-
-    case "AssignmentPattern":
-      break
-
-    case "ParenthesizedExpression":
-      node.expression = this.toAssignable(node.expression, isBinding)
-      break
-
-    case "MemberExpression":
-      if (!isBinding) break
-
-    default:
-      this.raise(node.start, "Assigning to rvalue")
-    }
-  }
-  return node
-}
-
-// Convert list of expression atoms to binding list.
-
-pp.toAssignableList = function(exprList, isBinding) {
-  let end = exprList.length
-  if (end) {
-    let last = exprList[end - 1]
-    if (last && last.type == "RestElement") {
-      --end
-    } else if (last && last.type == "SpreadElement") {
-      last.type = "RestElement"
-      let arg = last.argument
-      this.toAssignable(arg, isBinding)
-      if (arg.type !== "Identifier" && arg.type !== "MemberExpression" && arg.type !== "ArrayPattern")
-        this.unexpected(arg.start)
-      --end
-    }
-
-    if (isBinding && last && last.type === "RestElement" && last.argument.type !== "Identifier")
-      this.unexpected(last.argument.start)
-  }
-  for (let i = 0; i < end; i++) {
-    let elt = exprList[i]
-    if (elt) this.toAssignable(elt, isBinding)
-  }
-  return exprList
-}
-
-// Parses spread element.
-
-pp.parseSpread = function(refDestructuringErrors) {
-  let node = this.startNode()
-  this.next()
-  node.argument = this.parseMaybeAssign(false, refDestructuringErrors)
-  return this.finishNode(node, "SpreadElement")
-}
-
-pp.parseRest = function(allowNonIdent) {
-  let node = this.startNode()
-  this.next()
-
-  // RestElement inside of a function parameter must be an identifier
-  if (allowNonIdent) node.argument = this.type === tt.name ? this.parseIdent() : this.unexpected()
-  else node.argument = this.type === tt.name || this.type === tt.bracketL ? this.parseBindingAtom() : this.unexpected()
-
-  return this.finishNode(node, "RestElement")
-}
-
-// Parses lvalue (assignable) atom.
-
-pp.parseBindingAtom = function() {
-  if (this.options.ecmaVersion < 6) return this.parseIdent()
-  switch (this.type) {
-  case tt.name:
-    return this.parseIdent()
-
-  case tt.bracketL:
-    let node = this.startNode()
-    this.next()
-    node.elements = this.parseBindingList(tt.bracketR, true, true)
-    return this.finishNode(node, "ArrayPattern")
-
-  case tt.braceL:
-    return this.parseObj(true)
-
-  default:
-    this.unexpected()
-  }
-}
-
-pp.parseBindingList = function(close, allowEmpty, allowTrailingComma, allowNonIdent) {
-  let elts = [], first = true
-  while (!this.eat(close)) {
-    if (first) first = false
-    else this.expect(tt.comma)
-    if (allowEmpty && this.type === tt.comma) {
-      elts.push(null)
-    } else if (allowTrailingComma && this.afterTrailingComma(close)) {
-      break
-    } else if (this.type === tt.ellipsis) {
-      let rest = this.parseRest(allowNonIdent)
-      this.parseBindingListItem(rest)
-      elts.push(rest)
-      if (this.type === tt.comma) this.raise(this.start, "Comma is not permitted after the rest element")
-      this.expect(close)
-      break
-    } else {
-      let elem = this.parseMaybeDefault(this.start, this.startLoc)
-      this.parseBindingListItem(elem)
-      elts.push(elem)
-    }
-  }
-  return elts
-}
-
-pp.parseBindingListItem = function(param) {
-  return param
-}
-
-// Parses assignment pattern around given atom if possible.
-
-pp.parseMaybeDefault = function(startPos, startLoc, left) {
-  left = left || this.parseBindingAtom()
-  if (this.options.ecmaVersion < 6 || !this.eat(tt.eq)) return left
-  let node = this.startNodeAt(startPos, startLoc)
-  node.left = left
-  node.right = this.parseMaybeAssign()
-  return this.finishNode(node, "AssignmentPattern")
-}
-
-// Verify that a node is an lval — something that can be assigned
-// to.
-// bindingType can be either:
-// 'var' indicating that the lval creates a 'var' binding
-// 'let' indicating that the lval creates a lexical ('let' or 'const') binding
-// 'none' indicating that the binding should be checked for illegal identifiers, but not for duplicate references
-
-pp.checkLVal = function(expr, bindingType, checkClashes) {
-  switch (expr.type) {
-  case "Identifier":
-    if (this.strict && this.reservedWordsStrictBind.test(expr.name))
-      this.raiseRecoverable(expr.start, (bindingType ? "Binding " : "Assigning to ") + expr.name + " in strict mode")
-    if (checkClashes) {
-      if (has(checkClashes, expr.name))
-        this.raiseRecoverable(expr.start, "Argument name clash")
-      checkClashes[expr.name] = true
-    }
-    if (bindingType && bindingType !== "none") {
-      if (
-        bindingType === "var" && !this.canDeclareVarName(expr.name) ||
-        bindingType !== "var" && !this.canDeclareLexicalName(expr.name)
-      ) {
-        this.raiseRecoverable(expr.start, `Identifier '${expr.name}' has already been declared`)
-      }
-      if (bindingType === "var") {
-        this.declareVarName(expr.name)
-      } else {
-        this.declareLexicalName(expr.name)
-      }
-    }
-    break
-
-  case "MemberExpression":
-    if (bindingType) this.raiseRecoverable(expr.start, (bindingType ? "Binding" : "Assigning to") + " member expression")
-    break
-
-  case "ObjectPattern":
-    for (let i = 0; i < expr.properties.length; i++)
-      this.checkLVal(expr.properties[i].value, bindingType, checkClashes)
-    break
-
-  case "ArrayPattern":
-    for (let i = 0; i < expr.elements.length; i++) {
-      let elem = expr.elements[i]
-      if (elem) this.checkLVal(elem, bindingType, checkClashes)
-    }
-    break
-
-  case "AssignmentPattern":
-    this.checkLVal(expr.left, bindingType, checkClashes)
-    break
-
-  case "RestElement":
-    this.checkLVal(expr.argument, bindingType, checkClashes)
-    break
-
-  case "ParenthesizedExpression":
-    this.checkLVal(expr.expression, bindingType, checkClashes)
-    break
-
-  default:
-    this.raise(expr.start, (bindingType ? "Binding" : "Assigning to") + " rvalue")
-  }
-}
diff --git a/node_modules/acorn/src/node.js b/node_modules/acorn/src/node.js
deleted file mode 100644
index 76b5b0982..000000000
--- a/node_modules/acorn/src/node.js
+++ /dev/null
@@ -1,50 +0,0 @@
-import {Parser} from "./state"
-import {SourceLocation} from "./locutil"
-
-export class Node {
-  constructor(parser, pos, loc) {
-    this.type = ""
-    this.start = pos
-    this.end = 0
-    if (parser.options.locations)
-      this.loc = new SourceLocation(parser, loc)
-    if (parser.options.directSourceFile)
-      this.sourceFile = parser.options.directSourceFile
-    if (parser.options.ranges)
-      this.range = [pos, 0]
-  }
-}
-
-// Start an AST node, attaching a start offset.
-
-const pp = Parser.prototype
-
-pp.startNode = function() {
-  return new Node(this, this.start, this.startLoc)
-}
-
-pp.startNodeAt = function(pos, loc) {
-  return new Node(this, pos, loc)
-}
-
-// Finish an AST node, adding `type` and `end` properties.
-
-function finishNodeAt(node, type, pos, loc) {
-  node.type = type
-  node.end = pos
-  if (this.options.locations)
-    node.loc.end = loc
-  if (this.options.ranges)
-    node.range[1] = pos
-  return node
-}
-
-pp.finishNode = function(node, type) {
-  return finishNodeAt.call(this, node, type, this.lastTokEnd, this.lastTokEndLoc)
-}
-
-// Finish node at given position
-
-pp.finishNodeAt = function(node, type, pos, loc) {
-  return finishNodeAt.call(this, node, type, pos, loc)
-}
diff --git a/node_modules/acorn/src/options.js b/node_modules/acorn/src/options.js
deleted file mode 100644
index 9dda44ae8..000000000
--- a/node_modules/acorn/src/options.js
+++ /dev/null
@@ -1,127 +0,0 @@
-import {has, isArray} from "./util"
-import {SourceLocation} from "./locutil"
-
-// A second optional argument can be given to further configure
-// the parser process. These options are recognized:
-
-export const defaultOptions = {
-  // `ecmaVersion` indicates the ECMAScript version to parse. Must
-  // be either 3, 5, 6 (2015), 7 (2016), or 8 (2017). This influences support
-  // for strict mode, the set of reserved words, and support for
-  // new syntax features. The default is 7.
-  ecmaVersion: 7,
-  // `sourceType` indicates the mode the code should be parsed in.
-  // Can be either `"script"` or `"module"`. This influences global
-  // strict mode and parsing of `import` and `export` declarations.
-  sourceType: "script",
-  // `onInsertedSemicolon` can be a callback that will be called
-  // when a semicolon is automatically inserted. It will be passed
-  // th position of the comma as an offset, and if `locations` is
-  // enabled, it is given the location as a `{line, column}` object
-  // as second argument.
-  onInsertedSemicolon: null,
-  // `onTrailingComma` is similar to `onInsertedSemicolon`, but for
-  // trailing commas.
-  onTrailingComma: null,
-  // By default, reserved words are only enforced if ecmaVersion >= 5.
-  // Set `allowReserved` to a boolean value to explicitly turn this on
-  // an off. When this option has the value "never", reserved words
-  // and keywords can also not be used as property names.
-  allowReserved: null,
-  // When enabled, a return at the top level is not considered an
-  // error.
-  allowReturnOutsideFunction: false,
-  // When enabled, import/export statements are not constrained to
-  // appearing at the top of the program.
-  allowImportExportEverywhere: false,
-  // When enabled, hashbang directive in the beginning of file
-  // is allowed and treated as a line comment.
-  allowHashBang: false,
-  // When `locations` is on, `loc` properties holding objects with
-  // `start` and `end` properties in `{line, column}` form (with
-  // line being 1-based and column 0-based) will be attached to the
-  // nodes.
-  locations: false,
-  // A function can be passed as `onToken` option, which will
-  // cause Acorn to call that function with object in the same
-  // format as tokens returned from `tokenizer().getToken()`. Note
-  // that you are not allowed to call the parser from the
-  // callback—that will corrupt its internal state.
-  onToken: null,
-  // A function can be passed as `onComment` option, which will
-  // cause Acorn to call that function with `(block, text, start,
-  // end)` parameters whenever a comment is skipped. `block` is a
-  // boolean indicating whether this is a block (`/* */`) comment,
-  // `text` is the content of the comment, and `start` and `end` are
-  // character offsets that denote the start and end of the comment.
-  // When the `locations` option is on, two more parameters are
-  // passed, the full `{line, column}` locations of the start and
-  // end of the comments. Note that you are not allowed to call the
-  // parser from the callback—that will corrupt its internal state.
-  onComment: null,
-  // Nodes have their start and end characters offsets recorded in
-  // `start` and `end` properties (directly on the node, rather than
-  // the `loc` object, which holds line/column data. To also add a
-  // [semi-standardized][range] `range` property holding a `[start,
-  // end]` array with the same numbers, set the `ranges` option to
-  // `true`.
-  //
-  // [range]: https://bugzilla.mozilla.org/show_bug.cgi?id=745678
-  ranges: false,
-  // It is possible to parse multiple files into a single AST by
-  // passing the tree produced by parsing the first file as
-  // `program` option in subsequent parses. This will add the
-  // toplevel forms of the parsed file to the `Program` (top) node
-  // of an existing parse tree.
-  program: null,
-  // When `locations` is on, you can pass this to record the source
-  // file in every node's `loc` object.
-  sourceFile: null,
-  // This value, if given, is stored in every node, whether
-  // `locations` is on or off.
-  directSourceFile: null,
-  // When enabled, parenthesized expressions are represented by
-  // (non-standard) ParenthesizedExpression nodes
-  preserveParens: false,
-  plugins: {}
-}
-
-// Interpret and default an options object
-
-export function getOptions(opts) {
-  let options = {}
-
-  for (let opt in defaultOptions)
-    options[opt] = opts && has(opts, opt) ? opts[opt] : defaultOptions[opt]
-
-  if (options.ecmaVersion >= 2015)
-    options.ecmaVersion -= 2009
-
-  if (options.allowReserved == null)
-    options.allowReserved = options.ecmaVersion < 5
-
-  if (isArray(options.onToken)) {
-    let tokens = options.onToken
-    options.onToken = (token) => tokens.push(token)
-  }
-  if (isArray(options.onComment))
-    options.onComment = pushComment(options, options.onComment)
-
-  return options
-}
-
-function pushComment(options, array) {
-  return function(block, text, start, end, startLoc, endLoc) {
-    let comment = {
-      type: block ? "Block" : "Line",
-      value: text,
-      start: start,
-      end: end
-    }
-    if (options.locations)
-      comment.loc = new SourceLocation(this, startLoc, endLoc)
-    if (options.ranges)
-      comment.range = [start, end]
-    array.push(comment)
-  }
-}
diff --git a/node_modules/acorn/src/parseutil.js b/node_modules/acorn/src/parseutil.js
deleted file mode 100644
index ffa005030..000000000
--- a/node_modules/acorn/src/parseutil.js
+++ /dev/null
@@ -1,128 +0,0 @@
-import {types as tt} from "./tokentype"
-import {Parser} from "./state"
-import {lineBreak, skipWhiteSpace} from "./whitespace"
-
-const pp = Parser.prototype
-
-// ## Parser utilities
-
-const literal = /^(?:'((?:[^']|\.)*)'|"((?:[^"]|\.)*)"|;)/
-pp.strictDirective = function(start) {
-  for (;;) {
-    skipWhiteSpace.lastIndex = start
-    start += skipWhiteSpace.exec(this.input)[0].length
-    let match = literal.exec(this.input.slice(start))
-    if (!match) return false
-    if ((match[1] || match[2]) == "use strict") return true
-    start += match[0].length
-  }
-}
-
-// Predicate that tests whether the next token is of the given
-// type, and if yes, consumes it as a side effect.
-
-pp.eat = function(type) {
-  if (this.type === type) {
-    this.next()
-    return true
-  } else {
-    return false
-  }
-}
-
-// Tests whether parsed token is a contextual keyword.
-
-pp.isContextual = function(name) {
-  return this.type === tt.name && this.value === name
-}
-
-// Consumes contextual keyword if possible.
-
-pp.eatContextual = function(name) {
-  return this.value === name && this.eat(tt.name)
-}
-
-// Asserts that following token is given contextual keyword.
-
-pp.expectContextual = function(name) {
-  if (!this.eatContextual(name)) this.unexpected()
-}
-
-// Test whether a semicolon can be inserted at the current position.
-
-pp.canInsertSemicolon = function() {
-  return this.type === tt.eof ||
-    this.type === tt.braceR ||
-    lineBreak.test(this.input.slice(this.lastTokEnd, this.start))
-}
-
-pp.insertSemicolon = function() {
-  if (this.canInsertSemicolon()) {
-    if (this.options.onInsertedSemicolon)
-      this.options.onInsertedSemicolon(this.lastTokEnd, this.lastTokEndLoc)
-    return true
-  }
-}
-
-// Consume a semicolon, or, failing that, see if we are allowed to
-// pretend that there is a semicolon at this position.
-
-pp.semicolon = function() {
-  if (!this.eat(tt.semi) && !this.insertSemicolon()) this.unexpected()
-}
-
-pp.afterTrailingComma = function(tokType, notNext) {
-  if (this.type == tokType) {
-    if (this.options.onTrailingComma)
-      this.options.onTrailingComma(this.lastTokStart, this.lastTokStartLoc)
-    if (!notNext)
-      this.next()
-    return true
-  }
-}
-
-// Expect a token of a given type. If found, consume it, otherwise,
-// raise an unexpected token error.
-
-pp.expect = function(type) {
-  this.eat(type) || this.unexpected()
-}
-
-// Raise an unexpected token error.
-
-pp.unexpected = function(pos) {
-  this.raise(pos != null ? pos : this.start, "Unexpected token")
-}
-
-export class DestructuringErrors {
-  constructor() {
-    this.shorthandAssign = this.trailingComma = this.parenthesizedAssign = this.parenthesizedBind = -1
-  }
-}
-
-pp.checkPatternErrors = function(refDestructuringErrors, isAssign) {
-  if (!refDestructuringErrors) return
-  if (refDestructuringErrors.trailingComma > -1)
-    this.raiseRecoverable(refDestructuringErrors.trailingComma, "Comma is not permitted after the rest element")
-  let parens = isAssign ? refDestructuringErrors.parenthesizedAssign : refDestructuringErrors.parenthesizedBind
-  if (parens > -1) this.raiseRecoverable(parens, "Parenthesized pattern")
-}
-
-pp.checkExpressionErrors = function(refDestructuringErrors, andThrow) {
-  let pos = refDestructuringErrors ? refDestructuringErrors.shorthandAssign : -1
-  if (!andThrow) return pos >= 0
-  if (pos > -1) this.raise(pos, "Shorthand property assignments are valid only in destructuring patterns")
-}
-
-pp.checkYieldAwaitInDefaultParams = function() {
-  if (this.yieldPos && (!this.awaitPos || this.yieldPos < this.awaitPos))
-    this.raise(this.yieldPos, "Yield expression cannot be a default value")
-  if (this.awaitPos)
-    this.raise(this.awaitPos, "Await expression cannot be a default value")
-}
-
-pp.isSimpleAssignTarget = function(expr) {
-  if (expr.type === "ParenthesizedExpression")
-    return this.isSimpleAssignTarget(expr.expression)
-  return expr.type === "Identifier" || expr.type === "MemberExpression"
-}
diff --git a/node_modules/acorn/src/scope.js b/node_modules/acorn/src/scope.js
deleted file mode 100644
index 2ec044899..000000000
--- a/node_modules/acorn/src/scope.js
+++ /dev/null
@@ -1,75 +0,0 @@
-import {Parser} from "./state"
-import {has} from "./util"
-
-const pp = Parser.prototype
-
-// Object.assign polyfill
-const assign = Object.assign || function(target, ...sources) {
-  for (let i = 0; i < sources.length; i++) {
-    const source = sources[i]
-    for (const key in source) {
-      if (has(source, key)) {
-        target[key] = source[key]
-      }
-    }
-  }
-  return target
-}
-
-// The functions in this module keep track of declared variables in the current scope in order to detect duplicate variable names.
-
-pp.enterFunctionScope = function() {
-  // var: a hash of var-declared names in the current lexical scope
-  // lexical: a hash of lexically-declared names in the current lexical scope
-  // childVar: a hash of var-declared names in all child lexical scopes of the current lexical scope (within the current function scope)
-  // parentLexical: a hash of lexically-declared names in all parent lexical scopes of the current lexical scope (within the current function scope)
-  this.scopeStack.push({var: {}, lexical: {}, childVar: {}, parentLexical: {}})
-}
-
-pp.exitFunctionScope = function() {
-  this.scopeStack.pop()
-}
-
-pp.enterLexicalScope = function() {
-  const parentScope = this.scopeStack[this.scopeStack.length - 1]
-  const childScope = {var: {}, lexical: {}, childVar: {}, parentLexical: {}}
-
-  this.scopeStack.push(childScope)
-  assign(childScope.parentLexical, parentScope.lexical, parentScope.parentLexical)
-}
-
-pp.exitLexicalScope = function() {
-  const childScope = this.scopeStack.pop()
-  const parentScope = this.scopeStack[this.scopeStack.length - 1]
-
-  assign(parentScope.childVar, childScope.var, childScope.childVar)
-}
-
-/**
- * A name can be declared with `var` if there are no variables with the same name declared with `let`/`const`
- * in the current lexical scope or any of the parent lexical scopes in this function.
- */
-pp.canDeclareVarName = function(name) {
-  const currentScope = this.scopeStack[this.scopeStack.length - 1]
-
-  return !has(currentScope.lexical, name) && !has(currentScope.parentLexical, name)
-}
-
-/**
- * A name can be declared with `let`/`const` if there are no variables with the same name declared with `let`/`const`
- * in the current scope, and there are no variables with the same name declared with `var` in the current scope or in
- * any child lexical scopes in this function.
- */
-pp.canDeclareLexicalName = function(name) {
-  const currentScope = this.scopeStack[this.scopeStack.length - 1]
-
-  return !has(currentScope.lexical, name) && !has(currentScope.var, name) && !has(currentScope.childVar, name)
-}
-
-pp.declareVarName = function(name) {
-  this.scopeStack[this.scopeStack.length - 1].var[name] = true
-}
-
-pp.declareLexicalName = function(name) {
-  this.scopeStack[this.scopeStack.length - 1].lexical[name] = true
-}
diff --git a/node_modules/acorn/src/state.js b/node_modules/acorn/src/state.js
deleted file mode 100644
index 5d9ae7501..000000000
--- a/node_modules/acorn/src/state.js
+++ /dev/null
@@ -1,115 +0,0 @@
-import {reservedWords, keywords} from "./identifier"
-import {types as tt} from "./tokentype"
-import {lineBreak} from "./whitespace"
-import {getOptions} from "./options"
-
-// Registered plugins
-export const plugins = {}
-
-function keywordRegexp(words) {
-  return new RegExp("^(" + words.replace(/ /g, "|") + ")$")
-}
-
-export class Parser {
-  constructor(options, input, startPos) {
-    this.options = options = getOptions(options)
-    this.sourceFile = options.sourceFile
-    this.keywords = keywordRegexp(keywords[options.ecmaVersion >= 6 ? 6 : 5])
-    let reserved = ""
-    if (!options.allowReserved) {
-      for (let v = options.ecmaVersion;; v--)
-        if (reserved = reservedWords[v]) break
-      if (options.sourceType == "module") reserved += " await"
-    }
-    this.reservedWords = keywordRegexp(reserved)
-    let reservedStrict = (reserved ? reserved + " " : "") + reservedWords.strict
-    this.reservedWordsStrict = keywordRegexp(reservedStrict)
-    this.reservedWordsStrictBind = keywordRegexp(reservedStrict + " " + reservedWords.strictBind)
-    this.input = String(input)
-
-    // Used to signal to callers of `readWord1` whether the word
-    // contained any escape sequences. This is needed because words with
-    // escape sequences must not be interpreted as keywords.
-    this.containsEsc = false
-
-    // Load plugins
-    this.loadPlugins(options.plugins)
-
-    // Set up token state
-
-    // The current position of the tokenizer in the input.
-    if (startPos) {
-      this.pos = startPos
-      this.lineStart = this.input.lastIndexOf("\n", startPos - 1) + 1
-      this.curLine = this.input.slice(0, this.lineStart).split(lineBreak).length
-    } else {
-      this.pos = this.lineStart = 0
-      this.curLine = 1
-    }
-
-    // Properties of the current token:
-    // Its type
-    this.type = tt.eof
-    // For tokens that include more information than their type, the value
-    this.value = null
-    // Its start and end offset
-    this.start = this.end = this.pos
-    // And, if locations are used, the {line, column} object
-    // corresponding to those offsets
-    this.startLoc = this.endLoc = this.curPosition()
-
-    // Position information for the previous token
-    this.lastTokEndLoc = this.lastTokStartLoc = null
-    this.lastTokStart = this.lastTokEnd = this.pos
-
-    // The context stack is used to superficially track syntactic
-    // context to predict whether a regular expression is allowed in a
-    // given position.
-    this.context = this.initialContext()
-    this.exprAllowed = true
-
-    // Figure out if it's a module code.
-    this.inModule = options.sourceType === "module"
-    this.strict = this.inModule || this.strictDirective(this.pos)
-
-    // Used to signify the start of a potential arrow function
-    this.potentialArrowAt = -1
-
-    // Flags to track whether we are in a function, a generator, an async function.
-    this.inFunction = this.inGenerator = this.inAsync = false
-    // Positions to delayed-check that yield/await does not exist in default parameters.
-    this.yieldPos = this.awaitPos = 0
-    // Labels in scope.
-    this.labels = []
-
-    // If enabled, skip leading hashbang line.
-    if (this.pos === 0 && options.allowHashBang && this.input.slice(0, 2) === "#!")
-      this.skipLineComment(2)
-
-    // Scope tracking for duplicate variable names (see scope.js)
-    this.scopeStack = []
-    this.enterFunctionScope()
-  }
-
-  // DEPRECATED Kept for backwards compatibility until 3.0 in case a plugin uses them
-  isKeyword(word) { return this.keywords.test(word) }
-  isReservedWord(word) { return this.reservedWords.test(word) }
-
-  extend(name, f) {
-    this[name] = f(this[name])
-  }
-
-  loadPlugins(pluginConfigs) {
-    for (let name in pluginConfigs) {
-      let plugin = plugins[name]
-      if (!plugin) throw new Error("Plugin '" + name + "' not found")
-      plugin(this, pluginConfigs[name])
-    }
-  }
-
-  parse() {
-    let node = this.options.program || this.startNode()
-    this.nextToken()
-    return this.parseTopLevel(node)
-  }
-}
diff --git a/node_modules/acorn/src/statement.js b/node_modules/acorn/src/statement.js
deleted file mode 100644
index eb2f18e8b..000000000
--- a/node_modules/acorn/src/statement.js
+++ /dev/null
@@ -1,765 +0,0 @@
-import {types as tt} from "./tokentype"
-import {Parser} from "./state"
-import {lineBreak, skipWhiteSpace} from "./whitespace"
-import {isIdentifierStart, isIdentifierChar} from "./identifier"
-import {has} from "./util"
-import {DestructuringErrors} from "./parseutil"
-
-const pp = Parser.prototype
-
-// ### Statement parsing
-
-// Parse a program. Initializes the parser, reads any number of
-// statements, and wraps them in a Program node.  Optionally takes a
-// `program` argument.  If present, the statements will be appended
-// to its body instead of creating a new node.
-
-pp.parseTopLevel = function(node) {
-  let exports = {}
-  if (!node.body) node.body = []
-  while (this.type !== tt.eof) {
-    let stmt = this.parseStatement(true, true, exports)
-    node.body.push(stmt)
-  }
-  this.next()
-  if (this.options.ecmaVersion >= 6) {
-    node.sourceType = this.options.sourceType
-  }
-  return this.finishNode(node, "Program")
-}
-
-const loopLabel = {kind: "loop"}, switchLabel = {kind: "switch"}
-
-pp.isLet = function() {
-  if (this.type !== tt.name || this.options.ecmaVersion < 6 || this.value != "let") return false
-  skipWhiteSpace.lastIndex = this.pos
-  let skip = skipWhiteSpace.exec(this.input)
-  let next = this.pos + skip[0].length, nextCh = this.input.charCodeAt(next)
-  if (nextCh === 91 || nextCh == 123) return true // '{' and '['
-  if (isIdentifierStart(nextCh, true)) {
-    let pos = next + 1
-    while (isIdentifierChar(this.input.charCodeAt(pos), true)) ++pos
-    let ident = this.input.slice(next, pos)
-    if (!this.isKeyword(ident)) return true
-  }
-  return false
-}
-
-// check 'async [no LineTerminator here] function'
-// - 'async /*foo*/ function' is OK.
-// - 'async /*\n*/ function' is invalid.
-pp.isAsyncFunction = function() {
-  if (this.type !== tt.name || this.options.ecmaVersion < 8 || this.value != "async")
-    return false
-
-  skipWhiteSpace.lastIndex = this.pos
-  let skip = skipWhiteSpace.exec(this.input)
-  let next = this.pos + skip[0].length
-  return !lineBreak.test(this.input.slice(this.pos, next)) &&
-    this.input.slice(next, next + 8) === "function" &&
-    (next + 8 == this.input.length || !isIdentifierChar(this.input.charAt(next + 8)))
-}
-
-// Parse a single statement.
-//
-// If expecting a statement and finding a slash operator, parse a
-// regular expression literal. This is to handle cases like
-// `if (foo) /blah/.exec(foo)`, where looking at the previous token
-// does not help.
-
-pp.parseStatement = function(declaration, topLevel, exports) {
-  let starttype = this.type, node = this.startNode(), kind
-
-  if (this.isLet()) {
-    starttype = tt._var
-    kind = "let"
-  }
-
-  // Most types of statements are recognized by the keyword they
-  // start with. Many are trivial to parse, some require a bit of
-  // complexity.
-
-  switch (starttype) {
-  case tt._break: case tt._continue: return this.parseBreakContinueStatement(node, starttype.keyword)
-  case tt._debugger: return this.parseDebuggerStatement(node)
-  case tt._do: return this.parseDoStatement(node)
-  case tt._for: return this.parseForStatement(node)
-  case tt._function:
-    if (!declaration && this.options.ecmaVersion >= 6) this.unexpected()
-    return this.parseFunctionStatement(node, false)
-  case tt._class:
-    if (!declaration) this.unexpected()
-    return this.parseClass(node, true)
-  case tt._if: return this.parseIfStatement(node)
-  case tt._return: return this.parseReturnStatement(node)
-  case tt._switch: return this.parseSwitchStatement(node)
-  case tt._throw: return this.parseThrowStatement(node)
-  case tt._try: return this.parseTryStatement(node)
-  case tt._const: case tt._var:
-    kind = kind || this.value
-    if (!declaration && kind != "var") this.unexpected()
-    return this.parseVarStatement(node, kind)
-  case tt._while: return this.parseWhileStatement(node)
-  case tt._with: return this.parseWithStatement(node)
-  case tt.braceL: return this.parseBlock()
-  case tt.semi: return this.parseEmptyStatement(node)
-  case tt._export:
-  case tt._import:
-    if (!this.options.allowImportExportEverywhere) {
-      if (!topLevel)
-        this.raise(this.start, "'import' and 'export' may only appear at the top level")
-      if (!this.inModule)
-        this.raise(this.start, "'import' and 'export' may appear only with 'sourceType: module'")
-    }
-    return starttype === tt._import ? this.parseImport(node) : this.parseExport(node, exports)
-
-    // If the statement does not start with a statement keyword or a
-    // brace, it's an ExpressionStatement or LabeledStatement. We
-    // simply start parsing an expression, and afterwards, if the
-    // next token is a colon and the expression was a simple
-    // Identifier node, we switch to interpreting it as a label.
-  default:
-    if (this.isAsyncFunction() && declaration) {
-      this.next()
-      return this.parseFunctionStatement(node, true)
-    }
-
-    let maybeName = this.value, expr = this.parseExpression()
-    if (starttype === tt.name && expr.type === "Identifier" && this.eat(tt.colon))
-      return this.parseLabeledStatement(node, maybeName, expr)
-    else return this.parseExpressionStatement(node, expr)
-  }
-}
-
-pp.parseBreakContinueStatement = function(node, keyword) {
-  let isBreak = keyword == "break"
-  this.next()
-  if (this.eat(tt.semi) || this.insertSemicolon()) node.label = null
-  else if (this.type !== tt.name) this.unexpected()
-  else {
-    node.label = this.parseIdent()
-    this.semicolon()
-  }
-
-  // Verify that there is an actual destination to break or
-  // continue to.
-  let i = 0
-  for (; i < this.labels.length; ++i) {
-    let lab = this.labels[i]
-    if (node.label == null || lab.name === node.label.name) {
-      if (lab.kind != null && (isBreak || lab.kind === "loop")) break
-      if (node.label && isBreak) break
-    }
-  }
-  if (i === this.labels.length) this.raise(node.start, "Unsyntactic " + keyword)
-  return this.finishNode(node, isBreak ? "BreakStatement" : "ContinueStatement")
-}
-
-pp.parseDebuggerStatement = function(node) {
-  this.next()
-  this.semicolon()
-  return this.finishNode(node, "DebuggerStatement")
-}
-
-pp.parseDoStatement = function(node) {
-  this.next()
-  this.labels.push(loopLabel)
-  node.body = this.parseStatement(false)
-  this.labels.pop()
-  this.expect(tt._while)
-  node.test = this.parseParenExpression()
-  if (this.options.ecmaVersion >= 6)
-    this.eat(tt.semi)
-  else
-    this.semicolon()
-  return this.finishNode(node, "DoWhileStatement")
-}
-
-// Disambiguating between a `for` and a `for`/`in` or `for`/`of`
-// loop is non-trivial. Basically, we have to parse the init `var`
-// statement or expression, disallowing the `in` operator (see
-// the second parameter to `parseExpression`), and then check
-// whether the next token is `in` or `of`. When there is no init
-// part (semicolon immediately after the opening parenthesis), it
-// is a regular `for` loop.
-
-pp.parseForStatement = function(node) {
-  this.next()
-  this.labels.push(loopLabel)
-  this.enterLexicalScope()
-  this.expect(tt.parenL)
-  if (this.type === tt.semi) return this.parseFor(node, null)
-  let isLet = this.isLet()
-  if (this.type === tt._var || this.type === tt._const || isLet) {
-    let init = this.startNode(), kind = isLet ? "let" : this.value
-    this.next()
-    this.parseVar(init, true, kind)
-    this.finishNode(init, "VariableDeclaration")
-    if ((this.type === tt._in || (this.options.ecmaVersion >= 6 && this.isContextual("of"))) && init.declarations.length === 1 &&
-        !(kind !== "var" && init.declarations[0].init))
-      return this.parseForIn(node, init)
-    return this.parseFor(node, init)
-  }
-  let refDestructuringErrors = new DestructuringErrors
-  let init = this.parseExpression(true, refDestructuringErrors)
-  if (this.type === tt._in || (this.options.ecmaVersion >= 6 && this.isContextual("of"))) {
-    this.toAssignable(init)
-    this.checkLVal(init)
-    this.checkPatternErrors(refDestructuringErrors, true)
-    return this.parseForIn(node, init)
-  } else {
-    this.checkExpressionErrors(refDestructuringErrors, true)
-  }
-  return this.parseFor(node, init)
-}
-
-pp.parseFunctionStatement = function(node, isAsync) {
-  this.next()
-  return this.parseFunction(node, true, false, isAsync)
-}
-
-pp.isFunction = function() {
-  return this.type === tt._function || this.isAsyncFunction()
-}
-
-pp.parseIfStatement = function(node) {
-  this.next()
-  node.test = this.parseParenExpression()
-  // allow function declarations in branches, but only in non-strict mode
-  node.consequent = this.parseStatement(!this.strict && this.isFunction())
-  node.alternate = this.eat(tt._else) ? this.parseStatement(!this.strict && this.isFunction()) : null
-  return this.finishNode(node, "IfStatement")
-}
-
-pp.parseReturnStatement = function(node) {
-  if (!this.inFunction && !this.options.allowReturnOutsideFunction)
-    this.raise(this.start, "'return' outside of function")
-  this.next()
-
-  // In `return` (and `break`/`continue`), the keywords with
-  // optional arguments, we eagerly look for a semicolon or the
-  // possibility to insert one.
-
-  if (this.eat(tt.semi) || this.insertSemicolon()) node.argument = null
-  else { node.argument = this.parseExpression(); this.semicolon() }
-  return this.finishNode(node, "ReturnStatement")
-}
-
-pp.parseSwitchStatement = function(node) {
-  this.next()
-  node.discriminant = this.parseParenExpression()
-  node.cases = []
-  this.expect(tt.braceL)
-  this.labels.push(switchLabel)
-  this.enterLexicalScope()
-
-  // Statements under must be grouped (by label) in SwitchCase
-  // nodes. `cur` is used to keep the node that we are currently
-  // adding statements to.
-
-  let cur
-  for (let sawDefault = false; this.type != tt.braceR;) {
-    if (this.type === tt._case || this.type === tt._default) {
-      let isCase = this.type === tt._case
-      if (cur) this.finishNode(cur, "SwitchCase")
-      node.cases.push(cur = this.startNode())
-      cur.consequent = []
-      this.next()
-      if (isCase) {
-        cur.test = this.parseExpression()
-      } else {
-        if (sawDefault) this.raiseRecoverable(this.lastTokStart, "Multiple default clauses")
-        sawDefault = true
-        cur.test = null
-      }
-      this.expect(tt.colon)
-    } else {
-      if (!cur) this.unexpected()
-      cur.consequent.push(this.parseStatement(true))
-    }
-  }
-  this.exitLexicalScope()
-  if (cur) this.finishNode(cur, "SwitchCase")
-  this.next() // Closing brace
-  this.labels.pop()
-  return this.finishNode(node, "SwitchStatement")
-}
-
-pp.parseThrowStatement = function(node) {
-  this.next()
-  if (lineBreak.test(this.input.slice(this.lastTokEnd, this.start)))
-    this.raise(this.lastTokEnd, "Illegal newline after throw")
-  node.argument = this.parseExpression()
-  this.semicolon()
-  return this.finishNode(node, "ThrowStatement")
-}
-
-// Reused empty array added for node fields that are always empty.
-
-const empty = []
-
-pp.parseTryStatement = function(node) {
-  this.next()
-  node.block = this.parseBlock()
-  node.handler = null
-  if (this.type === tt._catch) {
-    let clause = this.startNode()
-    this.next()
-    this.expect(tt.parenL)
-    clause.param = this.parseBindingAtom()
-    this.enterLexicalScope()
-    this.checkLVal(clause.param, "let")
-    this.expect(tt.parenR)
-    clause.body = this.parseBlock(false)
-    this.exitLexicalScope()
-    node.handler = this.finishNode(clause, "CatchClause")
-  }
-  node.finalizer = this.eat(tt._finally) ? this.parseBlock() : null
-  if (!node.handler && !node.finalizer)
-    this.raise(node.start, "Missing catch or finally clause")
-  return this.finishNode(node, "TryStatement")
-}
-
-pp.parseVarStatement = function(node, kind) {
-  this.next()
-  this.parseVar(node, false, kind)
-  this.semicolon()
-  return this.finishNode(node, "VariableDeclaration")
-}
-
-pp.parseWhileStatement = function(node) {
-  this.next()
-  node.test = this.parseParenExpression()
-  this.labels.push(loopLabel)
-  node.body = this.parseStatement(false)
-  this.labels.pop()
-  return this.finishNode(node, "WhileStatement")
-}
-
-pp.parseWithStatement = function(node) {
-  if (this.strict) this.raise(this.start, "'with' in strict mode")
-  this.next()
-  node.object = this.parseParenExpression()
-  node.body = this.parseStatement(false)
-  return this.finishNode(node, "WithStatement")
-}
-
-pp.parseEmptyStatement = function(node) {
-  this.next()
-  return this.finishNode(node, "EmptyStatement")
-}
-
-pp.parseLabeledStatement = function(node, maybeName, expr) {
-  for (let i = 0; i < this.labels.length; ++i)
-    if (this.labels[i].name === maybeName) this.raise(expr.start, "Label '" + maybeName + "' is already declared")
-  let kind = this.type.isLoop ? "loop" : this.type === tt._switch ? "switch" : null
-  for (let i = this.labels.length - 1; i >= 0; i--) {
-    let label = this.labels[i]
-    if (label.statementStart == node.start) {
-      label.statementStart = this.start
-      label.kind = kind
-    } else break
-  }
-  this.labels.push({name: maybeName, kind: kind, statementStart: this.start})
-  node.body = this.parseStatement(true)
-  if (node.body.type == "ClassDeclaration" ||
-      node.body.type == "VariableDeclaration" && node.body.kind != "var" ||
-      node.body.type == "FunctionDeclaration" && (this.strict || node.body.generator))
-    this.raiseRecoverable(node.body.start, "Invalid labeled declaration")
-  this.labels.pop()
-  node.label = expr
-  return this.finishNode(node, "LabeledStatement")
-}
-
-pp.parseExpressionStatement = function(node, expr) {
-  node.expression = expr
-  this.semicolon()
-  return this.finishNode(node, "ExpressionStatement")
-}
-
-// Parse a semicolon-enclosed block of statements, handling `"use
-// strict"` declarations when `allowStrict` is true (used for
-// function bodies).
-
-pp.parseBlock = function(createNewLexicalScope = true) {
-  let node = this.startNode()
-  node.body = []
-  this.expect(tt.braceL)
-  if (createNewLexicalScope) {
-    this.enterLexicalScope()
-  }
-  while (!this.eat(tt.braceR)) {
-    let stmt = this.parseStatement(true)
-    node.body.push(stmt)
-  }
-  if (createNewLexicalScope) {
-    this.exitLexicalScope()
-  }
-  return this.finishNode(node, "BlockStatement")
-}
-
-// Parse a regular `for` loop. The disambiguation code in
-// `parseStatement` will already have parsed the init statement or
-// expression.
-
-pp.parseFor = function(node, init) {
-  node.init = init
-  this.expect(tt.semi)
-  node.test = this.type === tt.semi ? null : this.parseExpression()
-  this.expect(tt.semi)
-  node.update = this.type === tt.parenR ? null : this.parseExpression()
-  this.expect(tt.parenR)
-  this.exitLexicalScope()
-  node.body = this.parseStatement(false)
-  this.labels.pop()
-  return this.finishNode(node, "ForStatement")
-}
-
-// Parse a `for`/`in` and `for`/`of` loop, which are almost
-// same from parser's perspective.
-
-pp.parseForIn = function(node, init) {
-  let type = this.type === tt._in ? "ForInStatement" : "ForOfStatement"
-  this.next()
-  node.left = init
-  node.right = this.parseExpression()
-  this.expect(tt.parenR)
-  this.exitLexicalScope()
-  node.body = this.parseStatement(false)
-  this.labels.pop()
-  return this.finishNode(node, type)
-}
-
-// Parse a list of variable declarations.
-
-pp.parseVar = function(node, isFor, kind) {
-  node.declarations = []
-  node.kind = kind
-  for (;;) {
-    let decl = this.startNode()
-    this.parseVarId(decl, kind)
-    if (this.eat(tt.eq)) {
-      decl.init = this.parseMaybeAssign(isFor)
-    } else if (kind === "const" && !(this.type === tt._in || (this.options.ecmaVersion >= 6 && this.isContextual("of")))) {
-      this.unexpected()
-    } else if (decl.id.type != "Identifier" && !(isFor && (this.type === tt._in || this.isContextual("of")))) {
-      this.raise(this.lastTokEnd, "Complex binding patterns require an initialization value")
-    } else {
-      decl.init = null
-    }
-    node.declarations.push(this.finishNode(decl, "VariableDeclarator"))
-    if (!this.eat(tt.comma)) break
-  }
-  return node
-}
-
-pp.parseVarId = function(decl, kind) {
-  decl.id = this.parseBindingAtom(kind)
-  this.checkLVal(decl.id, kind, false)
-}
-
-// Parse a function declaration or literal (depending on the
-// `isStatement` parameter).
-
-pp.parseFunction = function(node, isStatement, allowExpressionBody, isAsync) {
-  this.initFunction(node)
-  if (this.options.ecmaVersion >= 6 && !isAsync)
-    node.generator = this.eat(tt.star)
-  if (this.options.ecmaVersion >= 8)
-    node.async = !!isAsync
-
-  if (isStatement) {
-    node.id = isStatement === "nullableID" && this.type != tt.name ? null : this.parseIdent()
-    if (node.id) {
-      this.checkLVal(node.id, "var")
-    }
-  }
-
-  let oldInGen = this.inGenerator, oldInAsync = this.inAsync,
-      oldYieldPos = this.yieldPos, oldAwaitPos = this.awaitPos, oldInFunc = this.inFunction
-  this.inGenerator = node.generator
-  this.inAsync = node.async
-  this.yieldPos = 0
-  this.awaitPos = 0
-  this.inFunction = true
-  this.enterFunctionScope()
-
-  if (!isStatement)
-    node.id = this.type == tt.name ? this.parseIdent() : null
-
-  this.parseFunctionParams(node)
-  this.parseFunctionBody(node, allowExpressionBody)
-
-  this.inGenerator = oldInGen
-  this.inAsync = oldInAsync
-  this.yieldPos = oldYieldPos
-  this.awaitPos = oldAwaitPos
-  this.inFunction = oldInFunc
-  return this.finishNode(node, isStatement ? "FunctionDeclaration" : "FunctionExpression")
-}
-
-pp.parseFunctionParams = function(node) {
-  this.expect(tt.parenL)
-  node.params = this.parseBindingList(tt.parenR, false, this.options.ecmaVersion >= 8, true)
-  this.checkYieldAwaitInDefaultParams()
-}
-
-// Parse a class declaration or literal (depending on the
-// `isStatement` parameter).
-
-pp.parseClass = function(node, isStatement) {
-  this.next()
-
-  this.parseClassId(node, isStatement)
-  this.parseClassSuper(node)
-  let classBody = this.startNode()
-  let hadConstructor = false
-  classBody.body = []
-  this.expect(tt.braceL)
-  while (!this.eat(tt.braceR)) {
-    if (this.eat(tt.semi)) continue
-    let method = this.startNode()
-    let isGenerator = this.eat(tt.star)
-    let isAsync = false
-    let isMaybeStatic = this.type === tt.name && this.value === "static"
-    this.parsePropertyName(method)
-    method.static = isMaybeStatic && this.type !== tt.parenL
-    if (method.static) {
-      if (isGenerator) this.unexpected()
-      isGenerator = this.eat(tt.star)
-      this.parsePropertyName(method)
-    }
-    if (this.options.ecmaVersion >= 8 && !isGenerator && !method.computed &&
-        method.key.type === "Identifier" && method.key.name === "async" && this.type !== tt.parenL &&
-        !this.canInsertSemicolon()) {
-      isAsync = true
-      this.parsePropertyName(method)
-    }
-    method.kind = "method"
-    let isGetSet = false
-    if (!method.computed) {
-      let {key} = method
-      if (!isGenerator && !isAsync && key.type === "Identifier" && this.type !== tt.parenL && (key.name === "get" || key.name === "set")) {
-        isGetSet = true
-        method.kind = key.name
-        key = this.parsePropertyName(method)
-      }
-      if (!method.static && (key.type === "Identifier" && key.name === "constructor" ||
-          key.type === "Literal" && key.value === "constructor")) {
-        if (hadConstructor) this.raise(key.start, "Duplicate constructor in the same class")
-        if (isGetSet) this.raise(key.start, "Constructor can't have get/set modifier")
-        if (isGenerator) this.raise(key.start, "Constructor can't be a generator")
-        if (isAsync) this.raise(key.start, "Constructor can't be an async method")
-        method.kind = "constructor"
-        hadConstructor = true
-      }
-    }
-    this.parseClassMethod(classBody, method, isGenerator, isAsync)
-    if (isGetSet) {
-      let paramCount = method.kind === "get" ? 0 : 1
-      if (method.value.params.length !== paramCount) {
-        let start = method.value.start
-        if (method.kind === "get")
-          this.raiseRecoverable(start, "getter should have no params")
-        else
-          this.raiseRecoverable(start, "setter should have exactly one param")
-      } else {
-        if (method.kind === "set" && method.value.params[0].type === "RestElement")
-          this.raiseRecoverable(method.value.params[0].start, "Setter cannot use rest params")
-      }
-    }
-  }
-  node.body = this.finishNode(classBody, "ClassBody")
-  return this.finishNode(node, isStatement ? "ClassDeclaration" : "ClassExpression")
-}
-
-pp.parseClassMethod = function(classBody, method, isGenerator, isAsync) {
-  method.value = this.parseMethod(isGenerator, isAsync)
-  classBody.body.push(this.finishNode(method, "MethodDefinition"))
-}
-
-pp.parseClassId = function(node, isStatement) {
-  node.id = this.type === tt.name ? this.parseIdent() : isStatement === true ? this.unexpected() : null
-}
-
-pp.parseClassSuper = function(node) {
-  node.superClass = this.eat(tt._extends) ? this.parseExprSubscripts() : null
-}
-
-// Parses module export declaration.
-
-pp.parseExport = function(node, exports) {
-  this.next()
-  // export * from '...'
-  if (this.eat(tt.star)) {
-    this.expectContextual("from")
-    node.source = this.type === tt.string ? this.parseExprAtom() : this.unexpected()
-    this.semicolon()
-    return this.finishNode(node, "ExportAllDeclaration")
-  }
-  if (this.eat(tt._default)) { // export default ...
-    this.checkExport(exports, "default", this.lastTokStart)
-    let isAsync
-    if (this.type === tt._function || (isAsync = this.isAsyncFunction())) {
-      let fNode = this.startNode()
-      this.next()
-      if (isAsync) this.next()
-      node.declaration = this.parseFunction(fNode, "nullableID", false, isAsync)
-    } else if (this.type === tt._class) {
-      let cNode = this.startNode()
-      node.declaration = this.parseClass(cNode, "nullableID")
-    } else {
-      node.declaration = this.parseMaybeAssign()
-      this.semicolon()
-    }
-    return this.finishNode(node, "ExportDefaultDeclaration")
-  }
-  // export var|const|let|function|class ...
-  if (this.shouldParseExportStatement()) {
-    node.declaration = this.parseStatement(true)
-    if (node.declaration.type === "VariableDeclaration")
-      this.checkVariableExport(exports, node.declaration.declarations)
-    else
-      this.checkExport(exports, node.declaration.id.name, node.declaration.id.start)
-    node.specifiers = []
-    node.source = null
-  } else { // export { x, y as z } [from '...']
-    node.declaration = null
-    node.specifiers = this.parseExportSpecifiers(exports)
-    if (this.eatContextual("from")) {
-      node.source = this.type === tt.string ? this.parseExprAtom() : this.unexpected()
-    } else {
-      // check for keywords used as local names
-      for (let i = 0; i < node.specifiers.length; i++) {
-        if (this.keywords.test(node.specifiers[i].local.name) || this.reservedWords.test(node.specifiers[i].local.name)) {
-          this.unexpected(node.specifiers[i].local.start)
-        }
-      }
-
-      node.source = null
-    }
-    this.semicolon()
-  }
-  return this.finishNode(node, "ExportNamedDeclaration")
-}
-
-pp.checkExport = function(exports, name, pos) {
-  if (!exports) return
-  if (has(exports, name))
-    this.raiseRecoverable(pos, "Duplicate export '" + name + "'")
-  exports[name] = true
-}
-
-pp.checkPatternExport = function(exports, pat) {
-  let type = pat.type
-  if (type == "Identifier")
-    this.checkExport(exports, pat.name, pat.start)
-  else if (type == "ObjectPattern")
-    for (let i = 0; i < pat.properties.length; ++i)
-      this.checkPatternExport(exports, pat.properties[i].value)
-  else if (type == "ArrayPattern")
-    for (let i = 0; i < pat.elements.length; ++i) {
-      let elt = pat.elements[i]
-      if (elt) this.checkPatternExport(exports, elt)
-    }
-  else if (type == "AssignmentPattern")
-    this.checkPatternExport(exports, pat.left)
-  else if (type == "ParenthesizedExpression")
-    this.checkPatternExport(exports, pat.expression)
-}
-
-pp.checkVariableExport = function(exports, decls) {
-  if (!exports) return
-  for (let i = 0; i < decls.length; i++)
-    this.checkPatternExport(exports, decls[i].id)
-}
-
-pp.shouldParseExportStatement = function() {
-  return this.type.keyword === "var" ||
-    this.type.keyword === "const" ||
-    this.type.keyword === "class" ||
-    this.type.keyword === "function" ||
-    this.isLet() ||
-    this.isAsyncFunction()
-}
-
-// Parses a comma-separated list of module exports.
-
-pp.parseExportSpecifiers = function(exports) {
-  let nodes = [], first = true
-  // export { x, y as z } [from '...']
-  this.expect(tt.braceL)
-  while (!this.eat(tt.braceR)) {
-    if (!first) {
-      this.expect(tt.comma)
-      if (this.afterTrailingComma(tt.braceR)) break
-    } else first = false
-
-    let node = this.startNode()
-    node.local = this.parseIdent(true)
-    node.exported = this.eatContextual("as") ? this.parseIdent(true) : node.local
-    this.checkExport(exports, node.exported.name, node.exported.start)
-    nodes.push(this.finishNode(node, "ExportSpecifier"))
-  }
-  return nodes
-}
-
-// Parses import declaration.
-
-pp.parseImport = function(node) {
-  this.next()
-  // import '...'
-  if (this.type === tt.string) {
-    node.specifiers = empty
-    node.source = this.parseExprAtom()
-  } else {
-    node.specifiers = this.parseImportSpecifiers()
-    this.expectContextual("from")
-    node.source = this.type === tt.string ? this.parseExprAtom() : this.unexpected()
-  }
-  this.semicolon()
-  return this.finishNode(node, "ImportDeclaration")
-}
-
-// Parses a comma-separated list of module imports.
-
-pp.parseImportSpecifiers = function() {
-  let nodes = [], first = true
-  if (this.type === tt.name) {
-    // import defaultObj, { x, y as z } from '...'
-    let node = this.startNode()
-    node.local = this.parseIdent()
-    this.checkLVal(node.local, "let")
-    nodes.push(this.finishNode(node, "ImportDefaultSpecifier"))
-    if (!this.eat(tt.comma)) return nodes
-  }
-  if (this.type === tt.star) {
-    let node = this.startNode()
-    this.next()
-    this.expectContextual("as")
-    node.local = this.parseIdent()
-    this.checkLVal(node.local, "let")
-    nodes.push(this.finishNode(node, "ImportNamespaceSpecifier"))
-    return nodes
-  }
-  this.expect(tt.braceL)
-  while (!this.eat(tt.braceR)) {
-    if (!first) {
-      this.expect(tt.comma)
-      if (this.afterTrailingComma(tt.braceR)) break
-    } else first = false
-
-    let node = this.startNode()
-    node.imported = this.parseIdent(true)
-    if (this.eatContextual("as")) {
-      node.local = this.parseIdent()
-    } else {
-      node.local = node.imported
-      if (this.isKeyword(node.local.name)) this.unexpected(node.local.start)
-      if (this.reservedWordsStrict.test(node.local.name)) this.raiseRecoverable(node.local.start, "The keyword '" + node.local.name + "' is reserved")
-    }
-    this.checkLVal(node.local, "let")
-    nodes.push(this.finishNode(node, "ImportSpecifier"))
-  }
-  return nodes
-}
diff --git a/node_modules/acorn/src/tokencontext.js b/node_modules/acorn/src/tokencontext.js
deleted file mode 100644
index 33e94f489..000000000
--- a/node_modules/acorn/src/tokencontext.js
+++ /dev/null
@@ -1,139 +0,0 @@
-// The algorithm used to determine whether a regexp can appear at a
-// given point in the program is loosely based on sweet.js' approach.
-// See https://github.com/mozilla/sweet.js/wiki/design
-
-import {Parser} from "./state"
-import {types as tt} from "./tokentype"
-import {lineBreak} from "./whitespace"
-
-export class TokContext {
-  constructor(token, isExpr, preserveSpace, override, generator) {
-    this.token = token
-    this.isExpr = !!isExpr
-    this.preserveSpace = !!preserveSpace
-    this.override = override
-    this.generator = !!generator
-  }
-}
-
-export const types = {
-  b_stat: new TokContext("{", false),
-  b_expr: new TokContext("{", true),
-  b_tmpl: new TokContext("${", true),
-  p_stat: new TokContext("(", false),
-  p_expr: new TokContext("(", true),
-  q_tmpl: new TokContext("`", true, true, p => p.readTmplToken()),
-  f_expr: new TokContext("function", true),
-  f_expr_gen: new TokContext("function", true, false, null, true),
-  f_gen: new TokContext("function", false, false, null, true)
-}
-
-const pp = Parser.prototype
-
-pp.initialContext = function() {
-  return [types.b_stat]
-}
-
-pp.braceIsBlock = function(prevType) {
-  if (prevType === tt.colon) {
-    let parent = this.curContext()
-    if (parent === types.b_stat || parent === types.b_expr)
-      return !parent.isExpr
-  }
-  if (prevType === tt._return)
-    return lineBreak.test(this.input.slice(this.lastTokEnd, this.start))
-  if (prevType === tt._else || prevType === tt.semi || prevType === tt.eof || prevType === tt.parenR || prevType == tt.arrow)
-    return true
-  if (prevType == tt.braceL)
-    return this.curContext() === types.b_stat
-  return !this.exprAllowed
-}
-
-pp.inGeneratorContext = function() {
-  for (let i = this.context.length - 1; i >= 0; i--)
-    if (this.context[i].generator) return true
-  return false
-}
-
-pp.updateContext = function(prevType) {
-  let update, type = this.type
-  if (type.keyword && prevType == tt.dot)
-    this.exprAllowed = false
-  else if (update = type.updateContext)
-    update.call(this, prevType)
-  else
-    this.exprAllowed = type.beforeExpr
-}
-
-// Token-specific context update code
-
-tt.parenR.updateContext = tt.braceR.updateContext = function() {
-  if (this.context.length == 1) {
-    this.exprAllowed = true
-    return
-  }
-  let out = this.context.pop(), cur
-  if (out === types.b_stat && (cur = this.curContext()) && cur.token === "function") {
-    this.context.pop()
-    this.exprAllowed = false
-  } else if (out === types.b_tmpl) {
-    this.exprAllowed = true
-  } else {
-    this.exprAllowed = !out.isExpr
-  }
-}
-
-tt.braceL.updateContext = function(prevType) {
-  this.context.push(this.braceIsBlock(prevType) ? types.b_stat : types.b_expr)
-  this.exprAllowed = true
-}
-
-tt.dollarBraceL.updateContext = function() {
-  this.context.push(types.b_tmpl)
-  this.exprAllowed = true
-}
-
-tt.parenL.updateContext = function(prevType) {
-  let statementParens = prevType === tt._if || prevType === tt._for || prevType === tt._with || prevType === tt._while
-  this.context.push(statementParens ? types.p_stat : types.p_expr)
-  this.exprAllowed = true
-}
-
-tt.incDec.updateContext = function() {
-  // tokExprAllowed stays unchanged
-}
-
-tt._function.updateContext = function(prevType) {
-  if (prevType.beforeExpr && prevType !== tt.semi && prevType !== tt._else &&
-      !((prevType === tt.colon || prevType === tt.braceL) && this.curContext() === types.b_stat))
-    this.context.push(types.f_expr)
-  this.exprAllowed = false
-}
-
-tt.backQuote.updateContext = function() {
-  if (this.curContext() === types.q_tmpl)
-    this.context.pop()
-  else
-    this.context.push(types.q_tmpl)
-  this.exprAllowed = false
-}
-
-tt.star.updateContext = function(prevType) {
-  if (prevType == tt._function) {
-    if (this.curContext() === types.f_expr)
-      this.context[this.context.length - 1] = types.f_expr_gen
-    else
-      this.context.push(types.f_gen)
-  }
-  this.exprAllowed = true
-}
-
-tt.name.updateContext = function(prevType) {
-  let allowed = false
-  if (this.options.ecmaVersion >= 6) {
-    if (this.value == "of" && !this.exprAllowed ||
-        this.value == "yield" && this.inGeneratorContext())
-      allowed = true
-  }
-  this.exprAllowed = allowed
-}
diff --git a/node_modules/acorn/src/tokenize.js b/node_modules/acorn/src/tokenize.js
deleted file mode 100644
index 917a013b8..000000000
--- a/node_modules/acorn/src/tokenize.js
+++ /dev/null
@@ -1,687 +0,0 @@
-import {isIdentifierStart, isIdentifierChar} from "./identifier"
-import {types as tt, keywords as keywordTypes} from "./tokentype"
-import {Parser} from "./state"
-import {SourceLocation} from "./locutil"
-import {lineBreak, lineBreakG, isNewLine, nonASCIIwhitespace} from "./whitespace"
-
-// Object type used to represent tokens. Note that normally, tokens
-// simply exist as properties on the parser object. This is only
-// used for the onToken callback and the external tokenizer.
-
-export class Token {
-  constructor(p) {
-    this.type = p.type
-    this.value = p.value
-    this.start = p.start
-    this.end = p.end
-    if (p.options.locations)
-      this.loc = new SourceLocation(p, p.startLoc, p.endLoc)
-    if (p.options.ranges)
-      this.range = [p.start, p.end]
-  }
-}
-
-// ## Tokenizer
-
-const pp = Parser.prototype
-
-// Are we running under Rhino?
-const isRhino = typeof Packages == "object" && Object.prototype.toString.call(Packages) == "[object JavaPackage]"
-
-// Move to the next token
-
-pp.next = function() {
-  if (this.options.onToken)
-    this.options.onToken(new Token(this))
-
-  this.lastTokEnd = this.end
-  this.lastTokStart = this.start
-  this.lastTokEndLoc = this.endLoc
-  this.lastTokStartLoc = this.startLoc
-  this.nextToken()
-}
-
-pp.getToken = function() {
-  this.next()
-  return new Token(this)
-}
-
-// If we're in an ES6 environment, make parsers iterable
-if (typeof Symbol !== "undefined")
-  pp[Symbol.iterator] = function() {
-    return {
-      next: () => {
-        let token = this.getToken()
-        return {
-          done: token.type === tt.eof,
-          value: token
-        }
-      }
-    }
-  }
-
-// Toggle strict mode. Re-reads the next number or string to please
-// pedantic tests (`"use strict"; 010;` should fail).
-
-pp.curContext = function() {
-  return this.context[this.context.length - 1]
-}
-
-// Read a single token, updating the parser object's token-related
-// properties.
-
-pp.nextToken = function() {
-  let curContext = this.curContext()
-  if (!curContext || !curContext.preserveSpace) this.skipSpace()
-
-  this.start = this.pos
-  if (this.options.locations) this.startLoc = this.curPosition()
-  if (this.pos >= this.input.length) return this.finishToken(tt.eof)
-
-  if (curContext.override) return curContext.override(this)
-  else this.readToken(this.fullCharCodeAtPos())
-}
-
-pp.readToken = function(code) {
-  // Identifier or keyword. '\uXXXX' sequences are allowed in
-  // identifiers, so '\' also dispatches to that.
-  if (isIdentifierStart(code, this.options.ecmaVersion >= 6) || code === 92 /* '\' */)
-    return this.readWord()
-
-  return this.getTokenFromCode(code)
-}
-
-pp.fullCharCodeAtPos = function() {
-  let code = this.input.charCodeAt(this.pos)
-  if (code <= 0xd7ff || code >= 0xe000) return code
-  let next = this.input.charCodeAt(this.pos + 1)
-  return (code << 10) + next - 0x35fdc00
-}
-
-pp.skipBlockComment = function() {
-  let startLoc = this.options.onComment && this.curPosition()
-  let start = this.pos, end = this.input.indexOf("*/", this.pos += 2)
-  if (end === -1) this.raise(this.pos - 2, "Unterminated comment")
-  this.pos = end + 2
-  if (this.options.locations) {
-    lineBreakG.lastIndex = start
-    let match
-    while ((match = lineBreakG.exec(this.input)) && match.index < this.pos) {
-      ++this.curLine
-      this.lineStart = match.index + match[0].length
-    }
-  }
-  if (this.options.onComment)
-    this.options.onComment(true, this.input.slice(start + 2, end), start, this.pos,
-                           startLoc, this.curPosition())
-}
-
-pp.skipLineComment = function(startSkip) {
-  let start = this.pos
-  let startLoc = this.options.onComment && this.curPosition()
-  let ch = this.input.charCodeAt(this.pos += startSkip)
-  while (this.pos < this.input.length && ch !== 10 && ch !== 13 && ch !== 8232 && ch !== 8233) {
-    ++this.pos
-    ch = this.input.charCodeAt(this.pos)
-  }
-  if (this.options.onComment)
-    this.options.onComment(false, this.input.slice(start + startSkip, this.pos), start, this.pos,
-                           startLoc, this.curPosition())
-}
-
-// Called at the start of the parse and after every token. Skips
-// whitespace and comments, and.
-
-pp.skipSpace = function() {
-  loop: while (this.pos < this.input.length) {
-    let ch = this.input.charCodeAt(this.pos)
-    switch (ch) {
-    case 32: case 160: // ' '
-      ++this.pos
-      break
-    case 13:
-      if (this.input.charCodeAt(this.pos + 1) === 10) {
-        ++this.pos
-      }
-    case 10: case 8232: case 8233:
-      ++this.pos
-      if (this.options.locations) {
-        ++this.curLine
-        this.lineStart = this.pos
-      }
-      break
-    case 47: // '/'
-      switch (this.input.charCodeAt(this.pos + 1)) {
-      case 42: // '*'
-        this.skipBlockComment()
-        break
-      case 47:
-        this.skipLineComment(2)
-        break
-      default:
-        break loop
-      }
-      break
-    default:
-      if (ch > 8 && ch < 14 || ch >= 5760 && nonASCIIwhitespace.test(String.fromCharCode(ch))) {
-        ++this.pos
-      } else {
-        break loop
-      }
-    }
-  }
-}
-
-// Called at the end of every token. Sets `end`, `val`, and
-// maintains `context` and `exprAllowed`, and skips the space after
-// the token, so that the next one's `start` will point at the
-// right position.
-
-pp.finishToken = function(type, val) {
-  this.end = this.pos
-  if (this.options.locations) this.endLoc = this.curPosition()
-  let prevType = this.type
-  this.type = type
-  this.value = val
-
-  this.updateContext(prevType)
-}
-
-// ### Token reading
-
-// This is the function that is called to fetch the next token. It
-// is somewhat obscure, because it works in character codes rather
-// than characters, and because operator parsing has been inlined
-// into it.
-//
-// All in the name of speed.
-//
-pp.readToken_dot = function() {
-  let next = this.input.charCodeAt(this.pos + 1)
-  if (next >= 48 && next <= 57) return this.readNumber(true)
-  let next2 = this.input.charCodeAt(this.pos + 2)
-  if (this.options.ecmaVersion >= 6 && next === 46 && next2 === 46) { // 46 = dot '.'
-    this.pos += 3
-    return this.finishToken(tt.ellipsis)
-  } else {
-    ++this.pos
-    return this.finishToken(tt.dot)
-  }
-}
-
-pp.readToken_slash = function() { // '/'
-  let next = this.input.charCodeAt(this.pos + 1)
-  if (this.exprAllowed) { ++this.pos; return this.readRegexp() }
-  if (next === 61) return this.finishOp(tt.assign, 2)
-  return this.finishOp(tt.slash, 1)
-}
-
-pp.readToken_mult_modulo_exp = function(code) { // '%*'
-  let next = this.input.charCodeAt(this.pos + 1)
-  let size = 1
-  let tokentype = code === 42 ? tt.star : tt.modulo
-
-  // exponentiation operator ** and **=
-  if (this.options.ecmaVersion >= 7 && next === 42) {
-    ++size
-    tokentype = tt.starstar
-    next = this.input.charCodeAt(this.pos + 2)
-  }
-
-  if (next === 61) return this.finishOp(tt.assign, size + 1)
-  return this.finishOp(tokentype, size)
-}
-
-pp.readToken_pipe_amp = function(code) { // '|&'
-  let next = this.input.charCodeAt(this.pos + 1)
-  if (next === code) return this.finishOp(code === 124 ? tt.logicalOR : tt.logicalAND, 2)
-  if (next === 61) return this.finishOp(tt.assign, 2)
-  return this.finishOp(code === 124 ? tt.bitwiseOR : tt.bitwiseAND, 1)
-}
-
-pp.readToken_caret = function() { // '^'
-  let next = this.input.charCodeAt(this.pos + 1)
-  if (next === 61) return this.finishOp(tt.assign, 2)
-  return this.finishOp(tt.bitwiseXOR, 1)
-}
-
-pp.readToken_plus_min = function(code) { // '+-'
-  let next = this.input.charCodeAt(this.pos + 1)
-  if (next === code) {
-    if (next == 45 && this.input.charCodeAt(this.pos + 2) == 62 &&
-        lineBreak.test(this.input.slice(this.lastTokEnd, this.pos))) {
-      // A `-->` line comment
-      this.skipLineComment(3)
-      this.skipSpace()
-      return this.nextToken()
-    }
-    return this.finishOp(tt.incDec, 2)
-  }
-  if (next === 61) return this.finishOp(tt.assign, 2)
-  return this.finishOp(tt.plusMin, 1)
-}
-
-pp.readToken_lt_gt = function(code) { // '<>'
-  let next = this.input.charCodeAt(this.pos + 1)
-  let size = 1
-  if (next === code) {
-    size = code === 62 && this.input.charCodeAt(this.pos + 2) === 62 ? 3 : 2
-    if (this.input.charCodeAt(this.pos + size) === 61) return this.finishOp(tt.assign, size + 1)
-    return this.finishOp(tt.bitShift, size)
-  }
-  if (next == 33 && code == 60 && this.input.charCodeAt(this.pos + 2) == 45 &&
-      this.input.charCodeAt(this.pos + 3) == 45) {
-    if (this.inModule) this.unexpected()
-    // `<!--`, an XML-style comment that should be interpreted as a line comment
-    this.skipLineComment(4)
-    this.skipSpace()
-    return this.nextToken()
-  }
-  if (next === 61) size = 2
-  return this.finishOp(tt.relational, size)
-}
-
-pp.readToken_eq_excl = function(code) { // '=!'
-  let next = this.input.charCodeAt(this.pos + 1)
-  if (next === 61) return this.finishOp(tt.equality, this.input.charCodeAt(this.pos + 2) === 61 ? 3 : 2)
-  if (code === 61 && next === 62 && this.options.ecmaVersion >= 6) { // '=>'
-    this.pos += 2
-    return this.finishToken(tt.arrow)
-  }
-  return this.finishOp(code === 61 ? tt.eq : tt.prefix, 1)
-}
-
-pp.getTokenFromCode = function(code) {
-  switch (code) {
-    // The interpretation of a dot depends on whether it is followed
-    // by a digit or another two dots.
-  case 46: // '.'
-    return this.readToken_dot()
-
-    // Punctuation tokens.
-  case 40: ++this.pos; return this.finishToken(tt.parenL)
-  case 41: ++this.pos; return this.finishToken(tt.parenR)
-  case 59: ++this.pos; return this.finishToken(tt.semi)
-  case 44: ++this.pos; return this.finishToken(tt.comma)
-  case 91: ++this.pos; return this.finishToken(tt.bracketL)
-  case 93: ++this.pos; return this.finishToken(tt.bracketR)
-  case 123: ++this.pos; return this.finishToken(tt.braceL)
-  case 125: ++this.pos; return this.finishToken(tt.braceR)
-  case 58: ++this.pos; return this.finishToken(tt.colon)
-  case 63: ++this.pos; return this.finishToken(tt.question)
-
-  case 96: // '`'
-    if (this.options.ecmaVersion < 6) break
-    ++this.pos
-    return this.finishToken(tt.backQuote)
-
-  case 48: // '0'
-    let next = this.input.charCodeAt(this.pos + 1)
-    if (next === 120 || next === 88) return this.readRadixNumber(16) // '0x', '0X' - hex number
-    if (this.options.ecmaVersion >= 6) {
-      if (next === 111 || next === 79) return this.readRadixNumber(8) // '0o', '0O' - octal number
-      if (next === 98 || next === 66) return this.readRadixNumber(2) // '0b', '0B' - binary number
-    }
-    // Anything else beginning with a digit is an integer, octal
-    // number, or float.
-  case 49: case 50: case 51: case 52: case 53: case 54: case 55: case 56: case 57: // 1-9
-    return this.readNumber(false)
-
-    // Quotes produce strings.
-  case 34: case 39: // '"', "'"
-    return this.readString(code)
-
-    // Operators are parsed inline in tiny state machines. '=' (61) is
-    // often referred to. `finishOp` simply skips the amount of
-    // characters it is given as second argument, and returns a token
-    // of the type given by its first argument.
-
-  case 47: // '/'
-    return this.readToken_slash()
-
-  case 37: case 42: // '%*'
-    return this.readToken_mult_modulo_exp(code)
-
-  case 124: case 38: // '|&'
-    return this.readToken_pipe_amp(code)
-
-  case 94: // '^'
-    return this.readToken_caret()
-
-  case 43: case 45: // '+-'
-    return this.readToken_plus_min(code)
-
-  case 60: case 62: // '<>'
-    return this.readToken_lt_gt(code)
-
-  case 61: case 33: // '=!'
-    return this.readToken_eq_excl(code)
-
-  case 126: // '~'
-    return this.finishOp(tt.prefix, 1)
-  }
-
-  this.raise(this.pos, "Unexpected character '" + codePointToString(code) + "'")
-}
-
-pp.finishOp = function(type, size) {
-  let str = this.input.slice(this.pos, this.pos + size)
-  this.pos += size
-  return this.finishToken(type, str)
-}
-
-// Parse a regular expression. Some context-awareness is necessary,
-// since a '/' inside a '[]' set does not end the expression.
-
-function tryCreateRegexp(src, flags, throwErrorAt, parser) {
-  try {
-    return new RegExp(src, flags)
-  } catch (e) {
-    if (throwErrorAt !== undefined) {
-      if (e instanceof SyntaxError) parser.raise(throwErrorAt, "Error parsing regular expression: " + e.message)
-      throw e
-    }
-  }
-}
-
-const regexpUnicodeSupport = !!tryCreateRegexp("\uffff", "u")
-
-pp.readRegexp = function() {
-  let escaped, inClass, start = this.pos
-  for (;;) {
-    if (this.pos >= this.input.length) this.raise(start, "Unterminated regular expression")
-    let ch = this.input.charAt(this.pos)
-    if (lineBreak.test(ch)) this.raise(start, "Unterminated regular expression")
-    if (!escaped) {
-      if (ch === "[") inClass = true
-      else if (ch === "]" && inClass) inClass = false
-      else if (ch === "/" && !inClass) break
-      escaped = ch === "\\"
-    } else escaped = false
-    ++this.pos
-  }
-  let content = this.input.slice(start, this.pos)
-  ++this.pos
-  // Need to use `readWord1` because '\uXXXX' sequences are allowed
-  // here (don't ask).
-  let mods = this.readWord1()
-  let tmp = content, tmpFlags = ""
-  if (mods) {
-    let validFlags = /^[gim]*$/
-    if (this.options.ecmaVersion >= 6) validFlags = /^[gimuy]*$/
-    if (!validFlags.test(mods)) this.raise(start, "Invalid regular expression flag")
-    if (mods.indexOf("u") >= 0) {
-      if (regexpUnicodeSupport) {
-        tmpFlags = "u"
-      } else {
-        // Replace each astral symbol and every Unicode escape sequence that
-        // possibly represents an astral symbol or a paired surrogate with a
-        // single ASCII symbol to avoid throwing on regular expressions that
-        // are only valid in combination with the `/u` flag.
-        // Note: replacing with the ASCII symbol `x` might cause false
-        // negatives in unlikely scenarios. For example, `[\u{61}-b]` is a
-        // perfectly valid pattern that is equivalent to `[a-b]`, but it would
-        // be replaced by `[x-b]` which throws an error.
-        tmp = tmp.replace(/\\u\{([0-9a-fA-F]+)\}/g, (_match, code, offset) => {
-          code = Number("0x" + code)
-          if (code > 0x10FFFF) this.raise(start + offset + 3, "Code point out of bounds")
-          return "x"
-        })
-        tmp = tmp.replace(/\\u([a-fA-F0-9]{4})|[\uD800-\uDBFF][\uDC00-\uDFFF]/g, "x")
-        tmpFlags = tmpFlags.replace("u", "")
-      }
-    }
-  }
-  // Detect invalid regular expressions.
-  let value = null
-  // Rhino's regular expression parser is flaky and throws uncatchable exceptions,
-  // so don't do detection if we are running under Rhino
-  if (!isRhino) {
-    tryCreateRegexp(tmp, tmpFlags, start, this)
-    // Get a regular expression object for this pattern-flag pair, or `null` in
-    // case the current environment doesn't support the flags it uses.
-    value = tryCreateRegexp(content, mods)
-  }
-  return this.finishToken(tt.regexp, {pattern: content, flags: mods, value: value})
-}
-
-// Read an integer in the given radix. Return null if zero digits
-// were read, the integer value otherwise. When `len` is given, this
-// will return `null` unless the integer has exactly `len` digits.
-
-pp.readInt = function(radix, len) {
-  let start = this.pos, total = 0
-  for (let i = 0, e = len == null ? Infinity : len; i < e; ++i) {
-    let code = this.input.charCodeAt(this.pos), val
-    if (code >= 97) val = code - 97 + 10 // a
-    else if (code >= 65) val = code - 65 + 10 // A
-    else if (code >= 48 && code <= 57) val = code - 48 // 0-9
-    else val = Infinity
-    if (val >= radix) break
-    ++this.pos
-    total = total * radix + val
-  }
-  if (this.pos === start || len != null && this.pos - start !== len) return null
-
-  return total
-}
-
-pp.readRadixNumber = function(radix) {
-  this.pos += 2 // 0x
-  let val = this.readInt(radix)
-  if (val == null) this.raise(this.start + 2, "Expected number in radix " + radix)
-  if (isIdentifierStart(this.fullCharCodeAtPos())) this.raise(this.pos, "Identifier directly after number")
-  return this.finishToken(tt.num, val)
-}
-
-// Read an integer, octal integer, or floating-point number.
-
-pp.readNumber = function(startsWithDot) {
-  let start = this.pos, isFloat = false, octal = this.input.charCodeAt(this.pos) === 48
-  if (!startsWithDot && this.readInt(10) === null) this.raise(start, "Invalid number")
-  if (octal && this.pos == start + 1) octal = false
-  let next = this.input.charCodeAt(this.pos)
-  if (next === 46 && !octal) { // '.'
-    ++this.pos
-    this.readInt(10)
-    isFloat = true
-    next = this.input.charCodeAt(this.pos)
-  }
-  if ((next === 69 || next === 101) && !octal) { // 'eE'
-    next = this.input.charCodeAt(++this.pos)
-    if (next === 43 || next === 45) ++this.pos // '+-'
-    if (this.readInt(10) === null) this.raise(start, "Invalid number")
-    isFloat = true
-  }
-  if (isIdentifierStart(this.fullCharCodeAtPos())) this.raise(this.pos, "Identifier directly after number")
-
-  let str = this.input.slice(start, this.pos), val
-  if (isFloat) val = parseFloat(str)
-  else if (!octal || str.length === 1) val = parseInt(str, 10)
-  else if (/[89]/.test(str) || this.strict) this.raise(start, "Invalid number")
-  else val = parseInt(str, 8)
-  return this.finishToken(tt.num, val)
-}
-
-// Read a string value, interpreting backslash-escapes.
-
-pp.readCodePoint = function() {
-  let ch = this.input.charCodeAt(this.pos), code
-
-  if (ch === 123) {
-    if (this.options.ecmaVersion < 6) this.unexpected()
-    let codePos = ++this.pos
-    code = this.readHexChar(this.input.indexOf("}", this.pos) - this.pos)
-    ++this.pos
-    if (code > 0x10FFFF) this.raise(codePos, "Code point out of bounds")
-  } else {
-    code = this.readHexChar(4)
-  }
-  return code
-}
-
-function codePointToString(code) {
-  // UTF-16 Decoding
-  if (code <= 0xFFFF) return String.fromCharCode(code)
-  code -= 0x10000
-  return String.fromCharCode((code >> 10) + 0xD800, (code & 1023) + 0xDC00)
-}
-
-pp.readString = function(quote) {
-  let out = "", chunkStart = ++this.pos
-  for (;;) {
-    if (this.pos >= this.input.length) this.raise(this.start, "Unterminated string constant")
-    let ch = this.input.charCodeAt(this.pos)
-    if (ch === quote) break
-    if (ch === 92) { // '\'
-      out += this.input.slice(chunkStart, this.pos)
-      out += this.readEscapedChar(false)
-      chunkStart = this.pos
-    } else {
-      if (isNewLine(ch)) this.raise(this.start, "Unterminated string constant")
-      ++this.pos
-    }
-  }
-  out += this.input.slice(chunkStart, this.pos++)
-  return this.finishToken(tt.string, out)
-}
-
-// Reads template string tokens.
-
-pp.readTmplToken = function() {
-  let out = "", chunkStart = this.pos
-  for (;;) {
-    if (this.pos >= this.input.length) this.raise(this.start, "Unterminated template")
-    let ch = this.input.charCodeAt(this.pos)
-    if (ch === 96 || ch === 36 && this.input.charCodeAt(this.pos + 1) === 123) { // '`', '${'
-      if (this.pos === this.start && this.type === tt.template) {
-        if (ch === 36) {
-          this.pos += 2
-          return this.finishToken(tt.dollarBraceL)
-        } else {
-          ++this.pos
-          return this.finishToken(tt.backQuote)
-        }
-      }
-      out += this.input.slice(chunkStart, this.pos)
-      return this.finishToken(tt.template, out)
-    }
-    if (ch === 92) { // '\'
-      out += this.input.slice(chunkStart, this.pos)
-      out += this.readEscapedChar(true)
-      chunkStart = this.pos
-    } else if (isNewLine(ch)) {
-      out += this.input.slice(chunkStart, this.pos)
-      ++this.pos
-      switch (ch) {
-      case 13:
-        if (this.input.charCodeAt(this.pos) === 10) ++this.pos
-      case 10:
-        out += "\n"
-        break
-      default:
-        out += String.fromCharCode(ch)
-        break
-      }
-      if (this.options.locations) {
-        ++this.curLine
-        this.lineStart = this.pos
-      }
-      chunkStart = this.pos
-    } else {
-      ++this.pos
-    }
-  }
-}
-
-// Used to read escaped characters
-
-pp.readEscapedChar = function(inTemplate) {
-  let ch = this.input.charCodeAt(++this.pos)
-  ++this.pos
-  switch (ch) {
-  case 110: return "\n" // 'n' -> '\n'
-  case 114: return "\r" // 'r' -> '\r'
-  case 120: return String.fromCharCode(this.readHexChar(2)) // 'x'
-  case 117: return codePointToString(this.readCodePoint()) // 'u'
-  case 116: return "\t" // 't' -> '\t'
-  case 98: return "\b" // 'b' -> '\b'
-  case 118: return "\u000b" // 'v' -> '\u000b'
-  case 102: return "\f" // 'f' -> '\f'
-  case 13: if (this.input.charCodeAt(this.pos) === 10) ++this.pos // '\r\n'
-  case 10: // ' \n'
-    if (this.options.locations) { this.lineStart = this.pos; ++this.curLine }
-    return ""
-  default:
-    if (ch >= 48 && ch <= 55) {
-      let octalStr = this.input.substr(this.pos - 1, 3).match(/^[0-7]+/)[0]
-      let octal = parseInt(octalStr, 8)
-      if (octal > 255) {
-        octalStr = octalStr.slice(0, -1)
-        octal = parseInt(octalStr, 8)
-      }
-      if (octalStr !== "0" && (this.strict || inTemplate)) {
-        this.raise(this.pos - 2, "Octal literal in strict mode")
-      }
-      this.pos += octalStr.length - 1
-      return String.fromCharCode(octal)
-    }
-    return String.fromCharCode(ch)
-  }
-}
-
-// Used to read character escape sequences ('\x', '\u', '\U').
-
-pp.readHexChar = function(len) {
-  let codePos = this.pos
-  let n = this.readInt(16, len)
-  if (n === null) this.raise(codePos, "Bad character escape sequence")
-  return n
-}
-
-// Read an identifier, and return it as a string. Sets `this.containsEsc`
-// to whether the word contained a '\u' escape.
-//
-// Incrementally adds only escaped chars, adding other chunks as-is
-// as a micro-optimization.
-
-pp.readWord1 = function() {
-  this.containsEsc = false
-  let word = "", first = true, chunkStart = this.pos
-  let astral = this.options.ecmaVersion >= 6
-  while (this.pos < this.input.length) {
-    let ch = this.fullCharCodeAtPos()
-    if (isIdentifierChar(ch, astral)) {
-      this.pos += ch <= 0xffff ? 1 : 2
-    } else if (ch === 92) { // "\"
-      this.containsEsc = true
-      word += this.input.slice(chunkStart, this.pos)
-      let escStart = this.pos
-      if (this.input.charCodeAt(++this.pos) != 117) // "u"
-        this.raise(this.pos, "Expecting Unicode escape sequence \\uXXXX")
-      ++this.pos
-      let esc = this.readCodePoint()
-      if (!(first ? isIdentifierStart : isIdentifierChar)(esc, astral))
-        this.raise(escStart, "Invalid Unicode escape")
-      word += codePointToString(esc)
-      chunkStart = this.pos
-    } else {
-      break
-    }
-    first = false
-  }
-  return word + this.input.slice(chunkStart, this.pos)
-}
-
-// Read an identifier or keyword token. Will check for reserved
-// words when necessary.
-
-pp.readWord = function() {
-  let word = this.readWord1()
-  let type = tt.name
-  if (this.keywords.test(word)) {
-    if (this.containsEsc) this.raiseRecoverable(this.start, "Escape sequence in keyword " + word)
-    type = keywordTypes[word]
-  }
-  return this.finishToken(type, word)
-}
diff --git a/node_modules/acorn/src/tokentype.js b/node_modules/acorn/src/tokentype.js
deleted file mode 100644
index 7c36e2d49..000000000
--- a/node_modules/acorn/src/tokentype.js
+++ /dev/null
@@ -1,147 +0,0 @@
-// ## Token types
-
-// The assignment of fine-grained, information-carrying type objects
-// allows the tokenizer to store the information it has about a
-// token in a way that is very cheap for the parser to look up.
-
-// All token type variables start with an underscore, to make them
-// easy to recognize.
-
-// The `beforeExpr` property is used to disambiguate between regular
-// expressions and divisions. It is set on all token types that can
-// be followed by an expression (thus, a slash after them would be a
-// regular expression).
-//
-// The `startsExpr` property is used to check if the token ends a
-// `yield` expression. It is set on all token types that either can
-// directly start an expression (like a quotation mark) or can
-// continue an expression (like the body of a string).
-//
-// `isLoop` marks a keyword as starting a loop, which is important
-// to know when parsing a label, in order to allow or disallow
-// continue jumps to that label.
-
-export class TokenType {
-  constructor(label, conf = {}) {
-    this.label = label
-    this.keyword = conf.keyword
-    this.beforeExpr = !!conf.beforeExpr
-    this.startsExpr = !!conf.startsExpr
-    this.isLoop = !!conf.isLoop
-    this.isAssign = !!conf.isAssign
-    this.prefix = !!conf.prefix
-    this.postfix = !!conf.postfix
-    this.binop = conf.binop || null
-    this.updateContext = null
-  }
-}
-
-function binop(name, prec) {
-  return new TokenType(name, {beforeExpr: true, binop: prec})
-}
-const beforeExpr = {beforeExpr: true}, startsExpr = {startsExpr: true}
-
-// Map keyword names to token types.
-
-export const keywords = {}
-
-// Succinct definitions of keyword token types
-function kw(name, options = {}) {
-  options.keyword = name
-  return keywords[name] = new TokenType(name, options)
-}
-
-export const types = {
-  num: new TokenType("num", startsExpr),
-  regexp: new TokenType("regexp", startsExpr),
-  string: new TokenType("string", startsExpr),
-  name: new TokenType("name", startsExpr),
-  eof: new TokenType("eof"),
-
-  // Punctuation token types.
-  bracketL: new TokenType("[", {beforeExpr: true, startsExpr: true}),
-  bracketR: new TokenType("]"),
-  braceL: new TokenType("{", {beforeExpr: true, startsExpr: true}),
-  braceR: new TokenType("}"),
-  parenL: new TokenType("(", {beforeExpr: true, startsExpr: true}),
-  parenR: new TokenType(")"),
-  comma: new TokenType(",", beforeExpr),
-  semi: new TokenType(";", beforeExpr),
-  colon: new TokenType(":", beforeExpr),
-  dot: new TokenType("."),
-  question: new TokenType("?", beforeExpr),
-  arrow: new TokenType("=>", beforeExpr),
-  template: new TokenType("template"),
-  ellipsis: new TokenType("...", beforeExpr),
-  backQuote: new TokenType("`", startsExpr),
-  dollarBraceL: new TokenType("${", {beforeExpr: true, startsExpr: true}),
-
-  // Operators. These carry several kinds of properties to help the
-  // parser use them properly (the presence of these properties is
-  // what categorizes them as operators).
-  //
-  // `binop`, when present, specifies that this operator is a binary
-  // operator, and will refer to its precedence.
-  //
-  // `prefix` and `postfix` mark the operator as a prefix or postfix
-  // unary operator.
-  //
-  // `isAssign` marks all of `=`, `+=`, `-=` etcetera, which act as
-  // binary operators with a very low precedence, that should result
-  // in AssignmentExpression nodes.
-
-  eq: new TokenType("=", {beforeExpr: true, isAssign: true}),
-  assign: new TokenType("_=", {beforeExpr: true, isAssign: true}),
-  incDec: new TokenType("++/--", {prefix: true, postfix: true, startsExpr: true}),
-  prefix: new TokenType("prefix", {beforeExpr: true, prefix: true, startsExpr: true}),
-  logicalOR: binop("||", 1),
-  logicalAND: binop("&&", 2),
-  bitwiseOR: binop("|", 3),
-  bitwiseXOR: binop("^", 4),
-  bitwiseAND: binop("&", 5),
-  equality: binop("==/!=", 6),
-  relational: binop("</>", 7),
-  bitShift: binop("<</>>", 8),
-  plusMin: new TokenType("+/-", {beforeExpr: true, binop: 9, prefix: true, startsExpr: true}),
-  modulo: binop("%", 10),
-  star: binop("*", 10),
-  slash: binop("/", 10),
-  starstar: new TokenType("**", {beforeExpr: true}),
-
-  // Keyword token types.
-  _break: kw("break"),
-  _case: kw("case", beforeExpr),
-  _catch: kw("catch"),
-  _continue: kw("continue"),
-  _debugger: kw("debugger"),
-  _default: kw("default", beforeExpr),
-  _do: kw("do", {isLoop: true, beforeExpr: true}),
-  _else: kw("else", beforeExpr),
-  _finally: kw("finally"),
-  _for: kw("for", {isLoop: true}),
-  _function: kw("function", startsExpr),
-  _if: kw("if"),
-  _return: kw("return", beforeExpr),
-  _switch: kw("switch"),
-  _throw: kw("throw", beforeExpr),
-  _try: kw("try"),
-  _var: kw("var"),
-  _const: kw("const"),
-  _while: kw("while", {isLoop: true}),
-  _with: kw("with"),
-  _new: kw("new", {beforeExpr: true, startsExpr: true}),
-  _this: kw("this", startsExpr),
-  _super: kw("super", startsExpr),
-  _class: kw("class"),
-  _extends: kw("extends", beforeExpr),
-  _export: kw("export"),
-  _import: kw("import"),
-  _null: kw("null", startsExpr),
-  _true: kw("true", startsExpr),
-  _false: kw("false", startsExpr),
-  _in: kw("in", {beforeExpr: true, binop: 7}),
-  _instanceof: kw("instanceof", {beforeExpr: true, binop: 7}),
-  _typeof: kw("typeof", {beforeExpr: true, prefix: true, startsExpr: true}),
-  _void: kw("void", {beforeExpr: true, prefix: true, startsExpr: true}),
-  _delete: kw("delete", {beforeExpr: true, prefix: true, startsExpr: true})
-}
diff --git a/node_modules/acorn/src/util.js b/node_modules/acorn/src/util.js
deleted file mode 100644
index 9f548a140..000000000
--- a/node_modules/acorn/src/util.js
+++ /dev/null
@@ -1,11 +0,0 @@
-const {hasOwnProperty, toString} = Object.prototype
-
-// Checks if an object has a property.
-
-export function has(obj, propName) {
-  return hasOwnProperty.call(obj, propName)
-}
-
-export const isArray = Array.isArray || ((obj) => (
-  toString.call(obj) === "[object Array]"
-))
diff --git a/node_modules/acorn/src/walk/index.js b/node_modules/acorn/src/walk/index.js
deleted file mode 100644
index e1c6ad409..000000000
--- a/node_modules/acorn/src/walk/index.js
+++ /dev/null
@@ -1,342 +0,0 @@
-// AST walker module for Mozilla Parser API compatible trees
-
-// A simple walk is one where you simply specify callbacks to be
-// called on specific nodes. The last two arguments are optional. A
-// simple use would be
-//
-//     walk.simple(myTree, {
-//         Expression: function(node) { ... }
-//     });
-//
-// to do something with all expressions. All Parser API node types
-// can be used to identify node types, as well as Expression,
-// Statement, and ScopeBody, which denote categories of nodes.
-//
-// The base argument can be used to pass a custom (recursive)
-// walker, and state can be used to give this walked an initial
-// state.
-
-export function simple(node, visitors, base, state, override) {
-  if (!base) base = exports.base
-  ;(function c(node, st, override) {
-    let type = override || node.type, found = visitors[type]
-    base[type](node, st, c)
-    if (found) found(node, st)
-  })(node, state, override)
-}
-
-// An ancestor walk keeps an array of ancestor nodes (including the
-// current node) and passes them to the callback as third parameter
-// (and also as state parameter when no other state is present).
-export function ancestor(node, visitors, base, state) {
-  if (!base) base = exports.base
-  let ancestors = []
-  ;(function c(node, st, override) {
-    let type = override || node.type, found = visitors[type]
-    let isNew = node != ancestors[ancestors.length - 1]
-    if (isNew) ancestors.push(node)
-    base[type](node, st, c)
-    if (found) found(node, st || ancestors, ancestors)
-    if (isNew) ancestors.pop()
-  })(node, state)
-}
-
-// A recursive walk is one where your functions override the default
-// walkers. They can modify and replace the state parameter that's
-// threaded through the walk, and can opt how and whether to walk
-// their child nodes (by calling their third argument on these
-// nodes).
-export function recursive(node, state, funcs, base, override) {
-  let visitor = funcs ? exports.make(funcs, base) : base
-  ;(function c(node, st, override) {
-    visitor[override || node.type](node, st, c)
-  })(node, state, override)
-}
-
-function makeTest(test) {
-  if (typeof test == "string")
-    return type => type == test
-  else if (!test)
-    return () => true
-  else
-    return test
-}
-
-class Found {
-  constructor(node, state) { this.node = node; this.state = state }
-}
-
-// Find a node with a given start, end, and type (all are optional,
-// null can be used as wildcard). Returns a {node, state} object, or
-// undefined when it doesn't find a matching node.
-export function findNodeAt(node, start, end, test, base, state) {
-  test = makeTest(test)
-  if (!base) base = exports.base
-  try {
-    (function c(node, st, override) {
-      let type = override || node.type
-      if ((start == null || node.start <= start) &&
-          (end == null || node.end >= end))
-        base[type](node, st, c)
-      if ((start == null || node.start == start) &&
-          (end == null || node.end == end) &&
-          test(type, node))
-        throw new Found(node, st)
-    })(node, state)
-  } catch (e) {
-    if (e instanceof Found) return e
-    throw e
-  }
-}
-
-// Find the innermost node of a given type that contains the given
-// position. Interface similar to findNodeAt.
-export function findNodeAround(node, pos, test, base, state) {
-  test = makeTest(test)
-  if (!base) base = exports.base
-  try {
-    (function c(node, st, override) {
-      let type = override || node.type
-      if (node.start > pos || node.end < pos) return
-      base[type](node, st, c)
-      if (test(type, node)) throw new Found(node, st)
-    })(node, state)
-  } catch (e) {
-    if (e instanceof Found) return e
-    throw e
-  }
-}
-
-// Find the outermost matching node after a given position.
-export function findNodeAfter(node, pos, test, base, state) {
-  test = makeTest(test)
-  if (!base) base = exports.base
-  try {
-    (function c(node, st, override) {
-      if (node.end < pos) return
-      let type = override || node.type
-      if (node.start >= pos && test(type, node)) throw new Found(node, st)
-      base[type](node, st, c)
-    })(node, state)
-  } catch (e) {
-    if (e instanceof Found) return e
-    throw e
-  }
-}
-
-// Find the outermost matching node before a given position.
-export function findNodeBefore(node, pos, test, base, state) {
-  test = makeTest(test)
-  if (!base) base = exports.base
-  let max
-  ;(function c(node, st, override) {
-    if (node.start > pos) return
-    let type = override || node.type
-    if (node.end <= pos && (!max || max.node.end < node.end) && test(type, node))
-      max = new Found(node, st)
-    base[type](node, st, c)
-  })(node, state)
-  return max
-}
-
-// Fallback to an Object.create polyfill for older environments.
-const create = Object.create || function(proto) {
-  function Ctor() {}
-  Ctor.prototype = proto
-  return new Ctor
-}
-
-// Used to create a custom walker. Will fill in all missing node
-// type properties with the defaults.
-export function make(funcs, base) {
-  if (!base) base = exports.base
-  let visitor = create(base)
-  for (let type in funcs) visitor[type] = funcs[type]
-  return visitor
-}
-
-function skipThrough(node, st, c) { c(node, st) }
-function ignore(_node, _st, _c) {}
-
-// Node walkers.
-
-export const base = {}
-
-base.Program = base.BlockStatement = (node, st, c) => {
-  for (let i = 0; i < node.body.length; ++i)
-    c(node.body[i], st, "Statement")
-}
-base.Statement = skipThrough
-base.EmptyStatement = ignore
-base.ExpressionStatement = base.ParenthesizedExpression =
-  (node, st, c) => c(node.expression, st, "Expression")
-base.IfStatement = (node, st, c) => {
-  c(node.test, st, "Expression")
-  c(node.consequent, st, "Statement")
-  if (node.alternate) c(node.alternate, st, "Statement")
-}
-base.LabeledStatement = (node, st, c) => c(node.body, st, "Statement")
-base.BreakStatement = base.ContinueStatement = ignore
-base.WithStatement = (node, st, c) => {
-  c(node.object, st, "Expression")
-  c(node.body, st, "Statement")
-}
-base.SwitchStatement = (node, st, c) => {
-  c(node.discriminant, st, "Expression")
-  for (let i = 0; i < node.cases.length; ++i) {
-    let cs = node.cases[i]
-    if (cs.test) c(cs.test, st, "Expression")
-    for (let j = 0; j < cs.consequent.length; ++j)
-      c(cs.consequent[j], st, "Statement")
-  }
-}
-base.ReturnStatement = base.YieldExpression = base.AwaitExpression = (node, st, c) => {
-  if (node.argument) c(node.argument, st, "Expression")
-}
-base.ThrowStatement = base.SpreadElement =
-  (node, st, c) => c(node.argument, st, "Expression")
-base.TryStatement = (node, st, c) => {
-  c(node.block, st, "Statement")
-  if (node.handler) c(node.handler, st)
-  if (node.finalizer) c(node.finalizer, st, "Statement")
-}
-base.CatchClause = (node, st, c) => {
-  c(node.param, st, "Pattern")
-  c(node.body, st, "ScopeBody")
-}
-base.WhileStatement = base.DoWhileStatement = (node, st, c) => {
-  c(node.test, st, "Expression")
-  c(node.body, st, "Statement")
-}
-base.ForStatement = (node, st, c) => {
-  if (node.init) c(node.init, st, "ForInit")
-  if (node.test) c(node.test, st, "Expression")
-  if (node.update) c(node.update, st, "Expression")
-  c(node.body, st, "Statement")
-}
-base.ForInStatement = base.ForOfStatement = (node, st, c) => {
-  c(node.left, st, "ForInit")
-  c(node.right, st, "Expression")
-  c(node.body, st, "Statement")
-}
-base.ForInit = (node, st, c) => {
-  if (node.type == "VariableDeclaration") c(node, st)
-  else c(node, st, "Expression")
-}
-base.DebuggerStatement = ignore
-
-base.FunctionDeclaration = (node, st, c) => c(node, st, "Function")
-base.VariableDeclaration = (node, st, c) => {
-  for (let i = 0; i < node.declarations.length; ++i)
-    c(node.declarations[i], st)
-}
-base.VariableDeclarator = (node, st, c) => {
-  c(node.id, st, "Pattern")
-  if (node.init) c(node.init, st, "Expression")
-}
-
-base.Function = (node, st, c) => {
-  if (node.id) c(node.id, st, "Pattern")
-  for (let i = 0; i < node.params.length; i++)
-    c(node.params[i], st, "Pattern")
-  c(node.body, st, node.expression ? "ScopeExpression" : "ScopeBody")
-}
-// FIXME drop these node types in next major version
-// (They are awkward, and in ES6 every block can be a scope.)
-base.ScopeBody = (node, st, c) => c(node, st, "Statement")
-base.ScopeExpression = (node, st, c) => c(node, st, "Expression")
-
-base.Pattern = (node, st, c) => {
-  if (node.type == "Identifier")
-    c(node, st, "VariablePattern")
-  else if (node.type == "MemberExpression")
-    c(node, st, "MemberPattern")
-  else
-    c(node, st)
-}
-base.VariablePattern = ignore
-base.MemberPattern = skipThrough
-base.RestElement = (node, st, c) => c(node.argument, st, "Pattern")
-base.ArrayPattern = (node, st, c) => {
-  for (let i = 0; i < node.elements.length; ++i) {
-    let elt = node.elements[i]
-    if (elt) c(elt, st, "Pattern")
-  }
-}
-base.ObjectPattern = (node, st, c) => {
-  for (let i = 0; i < node.properties.length; ++i)
-    c(node.properties[i].value, st, "Pattern")
-}
-
-base.Expression = skipThrough
-base.ThisExpression = base.Super = base.MetaProperty = ignore
-base.ArrayExpression = (node, st, c) => {
-  for (let i = 0; i < node.elements.length; ++i) {
-    let elt = node.elements[i]
-    if (elt) c(elt, st, "Expression")
-  }
-}
-base.ObjectExpression = (node, st, c) => {
-  for (let i = 0; i < node.properties.length; ++i)
-    c(node.properties[i], st)
-}
-base.FunctionExpression = base.ArrowFunctionExpression = base.FunctionDeclaration
-base.SequenceExpression = base.TemplateLiteral = (node, st, c) => {
-  for (let i = 0; i < node.expressions.length; ++i)
-    c(node.expressions[i], st, "Expression")
-}
-base.UnaryExpression = base.UpdateExpression = (node, st, c) => {
-  c(node.argument, st, "Expression")
-}
-base.BinaryExpression = base.LogicalExpression = (node, st, c) => {
-  c(node.left, st, "Expression")
-  c(node.right, st, "Expression")
-}
-base.AssignmentExpression = base.AssignmentPattern = (node, st, c) => {
-  c(node.left, st, "Pattern")
-  c(node.right, st, "Expression")
-}
-base.ConditionalExpression = (node, st, c) => {
-  c(node.test, st, "Expression")
-  c(node.consequent, st, "Expression")
-  c(node.alternate, st, "Expression")
-}
-base.NewExpression = base.CallExpression = (node, st, c) => {
-  c(node.callee, st, "Expression")
-  if (node.arguments) for (let i = 0; i < node.arguments.length; ++i)
-    c(node.arguments[i], st, "Expression")
-}
-base.MemberExpression = (node, st, c) => {
-  c(node.object, st, "Expression")
-  if (node.computed) c(node.property, st, "Expression")
-}
-base.ExportNamedDeclaration = base.ExportDefaultDeclaration = (node, st, c) => {
-  if (node.declaration)
-    c(node.declaration, st, node.type == "ExportNamedDeclaration" || node.declaration.id ? "Statement" : "Expression")
-  if (node.source) c(node.source, st, "Expression")
-}
-base.ExportAllDeclaration = (node, st, c) => {
-  c(node.source, st, "Expression")
-}
-base.ImportDeclaration = (node, st, c) => {
-  for (let i = 0; i < node.specifiers.length; i++)
-    c(node.specifiers[i], st)
-  c(node.source, st, "Expression")
-}
-base.ImportSpecifier = base.ImportDefaultSpecifier = base.ImportNamespaceSpecifier = base.Identifier = base.Literal = ignore
-
-base.TaggedTemplateExpression = (node, st, c) => {
-  c(node.tag, st, "Expression")
-  c(node.quasi, st)
-}
-base.ClassDeclaration = base.ClassExpression = (node, st, c) => c(node, st, "Class")
-base.Class = (node, st, c) => {
-  if (node.id) c(node.id, st, "Pattern")
-  if (node.superClass) c(node.superClass, st, "Expression")
-  for (let i = 0; i < node.body.body.length; i++)
-    c(node.body.body[i], st)
-}
-base.MethodDefinition = base.Property = (node, st, c) => {
-  if (node.computed) c(node.key, st, "Expression")
-  c(node.value, st, "Expression")
-}
diff --git a/node_modules/acorn/src/whitespace.js b/node_modules/acorn/src/whitespace.js
deleted file mode 100644
index 094c2e4a4..000000000
--- a/node_modules/acorn/src/whitespace.js
+++ /dev/null
@@ -1,13 +0,0 @@
-// Matches a whole line break (where CRLF is considered a single
-// line break). Used to count lines.
-
-export const lineBreak = /\r\n?|\n|\u2028|\u2029/
-export const lineBreakG = new RegExp(lineBreak.source, "g")
-
-export function isNewLine(code) {
-  return code === 10 || code === 13 || code === 0x2028 || code === 0x2029
-}
-
-export const nonASCIIwhitespace = /[\u1680\u180e\u2000-\u200a\u202f\u205f\u3000\ufeff]/
-
-export const skipWhiteSpace = /(?:\s|\/\/.*|\/\*[^]*?\*\/)*/g
author	Florian Dold <florian.dold@gmail.com>	2017-08-14 05:01:11 +0200
committer	Florian Dold <florian.dold@gmail.com>	2017-08-14 05:02:09 +0200
commit	363723fc84f7b8477592e0105aeb331ec9a017af (patch)
tree	29f92724f34131bac64d6a318dd7e30612e631c7 /node_modules/acorn
parent	5634e77ad96bfe1818f6b6ee70b7379652e5487f (diff)
download	wallet-core-363723fc84f7b8477592e0105aeb331ec9a017af.tar.xz