coverage for browser tests

7 files changed, 12721 insertions, 6 deletions

diff --git a/testlib/selenium/.gitignore b/testlib/selenium/.gitignore
new file mode 100644
index 000000000..8a8d8911e
--- /dev/null
+++ b/testlib/selenium/.gitignore
@@ -0,0 +1,2 @@
+coverage/
+coveage-*.json
diff --git a/testlib/selenium/escodegen.browser.js b/testlib/selenium/escodegen.browser.js
new file mode 100644
index 000000000..5f8f5e5b4
--- /dev/null
+++ b/testlib/selenium/escodegen.browser.js
@@ -0,0 +1,4947 @@
+// Generated by CommonJS Everywhere 0.9.7
+(function (global) {
+  function require(file, parentModule) {
+    if ({}.hasOwnProperty.call(require.cache, file))
+      return require.cache[file];
+    var resolved = require.resolve(file);
+    if (!resolved)
+      throw new Error('Failed to resolve module ' + file);
+    var module$ = {
+        id: file,
+        require: require,
+        filename: file,
+        exports: {},
+        loaded: false,
+        parent: parentModule,
+        children: []
+      };
+    if (parentModule)
+      parentModule.children.push(module$);
+    var dirname = file.slice(0, file.lastIndexOf('/') + 1);
+    require.cache[file] = module$.exports;
+    resolved.call(module$.exports, module$, module$.exports, dirname, file);
+    module$.loaded = true;
+    return require.cache[file] = module$.exports;
+  }
+  require.modules = {};
+  require.cache = {};
+  require.resolve = function (file) {
+    return {}.hasOwnProperty.call(require.modules, file) ? require.modules[file] : void 0;
+  };
+  require.define = function (file, fn) {
+    require.modules[file] = fn;
+  };
+  var process = function () {
+      var cwd = '/';
+      return {
+        title: 'browser',
+        version: 'v7.0.0',
+        browser: true,
+        env: {},
+        argv: [],
+        nextTick: global.setImmediate || function (fn) {
+          setTimeout(fn, 0);
+        },
+        cwd: function () {
+          return cwd;
+        },
+        chdir: function (dir) {
+          cwd = dir;
+        }
+      };
+    }();
+  require.define('/tools/entry-point.js', function (module, exports, __dirname, __filename) {
+    (function () {
+      'use strict';
+      global.escodegen = require('/escodegen.js', module);
+      escodegen.browser = true;
+    }());
+  });
+  require.define('/escodegen.js', function (module, exports, __dirname, __filename) {
+    (function () {
+      'use strict';
+      var Syntax, Precedence, BinaryPrecedence, SourceNode, estraverse, esutils, isArray, base, indent, json, renumber, hexadecimal, quotes, escapeless, newline, space, parentheses, semicolons, safeConcatenation, directive, extra, parse, sourceMap, sourceCode, preserveBlankLines, FORMAT_MINIFY, FORMAT_DEFAULTS;
+      estraverse = require('/node_modules/estraverse/estraverse.js', module);
+      esutils = require('/node_modules/esutils/lib/utils.js', module);
+      Syntax = estraverse.Syntax;
+      function isExpression(node) {
+        return CodeGenerator.Expression.hasOwnProperty(node.type);
+      }
+      function isStatement(node) {
+        return CodeGenerator.Statement.hasOwnProperty(node.type);
+      }
+      Precedence = {
+        Sequence: 0,
+        Yield: 1,
+        Await: 1,
+        Assignment: 1,
+        Conditional: 2,
+        ArrowFunction: 2,
+        LogicalOR: 3,
+        LogicalAND: 4,
+        BitwiseOR: 5,
+        BitwiseXOR: 6,
+        BitwiseAND: 7,
+        Equality: 8,
+        Relational: 9,
+        BitwiseSHIFT: 10,
+        Additive: 11,
+        Multiplicative: 12,
+        Unary: 13,
+        Postfix: 14,
+        Call: 15,
+        New: 16,
+        TaggedTemplate: 17,
+        Member: 18,
+        Primary: 19
+      };
+      BinaryPrecedence = {
+        '||': Precedence.LogicalOR,
+        '&&': Precedence.LogicalAND,
+        '|': Precedence.BitwiseOR,
+        '^': Precedence.BitwiseXOR,
+        '&': Precedence.BitwiseAND,
+        '==': Precedence.Equality,
+        '!=': Precedence.Equality,
+        '===': Precedence.Equality,
+        '!==': Precedence.Equality,
+        'is': Precedence.Equality,
+        'isnt': Precedence.Equality,
+        '<': Precedence.Relational,
+        '>': Precedence.Relational,
+        '<=': Precedence.Relational,
+        '>=': Precedence.Relational,
+        'in': Precedence.Relational,
+        'instanceof': Precedence.Relational,
+        '<<': Precedence.BitwiseSHIFT,
+        '>>': Precedence.BitwiseSHIFT,
+        '>>>': Precedence.BitwiseSHIFT,
+        '+': Precedence.Additive,
+        '-': Precedence.Additive,
+        '*': Precedence.Multiplicative,
+        '%': Precedence.Multiplicative,
+        '/': Precedence.Multiplicative
+      };
+      var F_ALLOW_IN = 1, F_ALLOW_CALL = 1 << 1, F_ALLOW_UNPARATH_NEW = 1 << 2, F_FUNC_BODY = 1 << 3, F_DIRECTIVE_CTX = 1 << 4, F_SEMICOLON_OPT = 1 << 5;
+      var E_FTT = F_ALLOW_CALL | F_ALLOW_UNPARATH_NEW, E_TTF = F_ALLOW_IN | F_ALLOW_CALL, E_TTT = F_ALLOW_IN | F_ALLOW_CALL | F_ALLOW_UNPARATH_NEW, E_TFF = F_ALLOW_IN, E_FFT = F_ALLOW_UNPARATH_NEW, E_TFT = F_ALLOW_IN | F_ALLOW_UNPARATH_NEW;
+      var S_TFFF = F_ALLOW_IN, S_TFFT = F_ALLOW_IN | F_SEMICOLON_OPT, S_FFFF = 0, S_TFTF = F_ALLOW_IN | F_DIRECTIVE_CTX, S_TTFF = F_ALLOW_IN | F_FUNC_BODY;
+      function getDefaultOptions() {
+        return {
+          indent: null,
+          base: null,
+          parse: null,
+          comment: false,
+          format: {
+            indent: {
+              style: '    ',
+              base: 0,
+              adjustMultilineComment: false
+            },
+            newline: '\n',
+            space: ' ',
+            json: false,
+            renumber: false,
+            hexadecimal: false,
+            quotes: 'single',
+            escapeless: false,
+            compact: false,
+            parentheses: true,
+            semicolons: true,
+            safeConcatenation: false,
+            preserveBlankLines: false
+          },
+          moz: {
+            comprehensionExpressionStartsWithAssignment: false,
+            starlessGenerator: false
+          },
+          sourceMap: null,
+          sourceMapRoot: null,
+          sourceMapWithCode: false,
+          directive: false,
+          raw: true,
+          verbatim: null,
+          sourceCode: null
+        };
+      }
+      function stringRepeat(str, num) {
+        var result = '';
+        for (num |= 0; num > 0; num >>>= 1, str += str) {
+          if (num & 1) {
+            result += str;
+          }
+        }
+        return result;
+      }
+      isArray = Array.isArray;
+      if (!isArray) {
+        isArray = function isArray(array) {
+          return Object.prototype.toString.call(array) === '[object Array]';
+        };
+      }
+      function hasLineTerminator(str) {
+        return /[\r\n]/g.test(str);
+      }
+      function endsWithLineTerminator(str) {
+        var len = str.length;
+        return len && esutils.code.isLineTerminator(str.charCodeAt(len - 1));
+      }
+      function merge(target, override) {
+        var key;
+        for (key in override) {
+          if (override.hasOwnProperty(key)) {
+            target[key] = override[key];
+          }
+        }
+        return target;
+      }
+      function updateDeeply(target, override) {
+        var key, val;
+        function isHashObject(target) {
+          return typeof target === 'object' && target instanceof Object && !(target instanceof RegExp);
+        }
+        for (key in override) {
+          if (override.hasOwnProperty(key)) {
+            val = override[key];
+            if (isHashObject(val)) {
+              if (isHashObject(target[key])) {
+                updateDeeply(target[key], val);
+              } else {
+                target[key] = updateDeeply({}, val);
+              }
+            } else {
+              target[key] = val;
+            }
+          }
+        }
+        return target;
+      }
+      function generateNumber(value) {
+        var result, point, temp, exponent, pos;
+        if (value !== value) {
+          throw new Error('Numeric literal whose value is NaN');
+        }
+        if (value < 0 || value === 0 && 1 / value < 0) {
+          throw new Error('Numeric literal whose value is negative');
+        }
+        if (value === 1 / 0) {
+          return json ? 'null' : renumber ? '1e400' : '1e+400';
+        }
+        result = '' + value;
+        if (!renumber || result.length < 3) {
+          return result;
+        }
+        point = result.indexOf('.');
+        if (!json && result.charCodeAt(0) === 48 && point === 1) {
+          point = 0;
+          result = result.slice(1);
+        }
+        temp = result;
+        result = result.replace('e+', 'e');
+        exponent = 0;
+        if ((pos = temp.indexOf('e')) > 0) {
+          exponent = +temp.slice(pos + 1);
+          temp = temp.slice(0, pos);
+        }
+        if (point >= 0) {
+          exponent -= temp.length - point - 1;
+          temp = +(temp.slice(0, point) + temp.slice(point + 1)) + '';
+        }
+        pos = 0;
+        while (temp.charCodeAt(temp.length + pos - 1) === 48) {
+          --pos;
+        }
+        if (pos !== 0) {
+          exponent -= pos;
+          temp = temp.slice(0, pos);
+        }
+        if (exponent !== 0) {
+          temp += 'e' + exponent;
+        }
+        if ((temp.length < result.length || hexadecimal && value > 1e12 && Math.floor(value) === value && (temp = '0x' + value.toString(16)).length < result.length) && +temp === value) {
+          result = temp;
+        }
+        return result;
+      }
+      function escapeRegExpCharacter(ch, previousIsBackslash) {
+        if ((ch & ~1) === 8232) {
+          return (previousIsBackslash ? 'u' : '\\u') + (ch === 8232 ? '2028' : '2029');
+        } else if (ch === 10 || ch === 13) {
+          return (previousIsBackslash ? '' : '\\') + (ch === 10 ? 'n' : 'r');
+        }
+        return String.fromCharCode(ch);
+      }
+      function generateRegExp(reg) {
+        var match, result, flags, i, iz, ch, characterInBrack, previousIsBackslash;
+        result = reg.toString();
+        if (reg.source) {
+          match = result.match(/\/([^\/]*)$/);
+          if (!match) {
+            return result;
+          }
+          flags = match[1];
+          result = '';
+          characterInBrack = false;
+          previousIsBackslash = false;
+          for (i = 0, iz = reg.source.length; i < iz; ++i) {
+            ch = reg.source.charCodeAt(i);
+            if (!previousIsBackslash) {
+              if (characterInBrack) {
+                if (ch === 93) {
+                  characterInBrack = false;
+                }
+              } else {
+                if (ch === 47) {
+                  result += '\\';
+                } else if (ch === 91) {
+                  characterInBrack = true;
+                }
+              }
+              result += escapeRegExpCharacter(ch, previousIsBackslash);
+              previousIsBackslash = ch === 92;
+            } else {
+              result += escapeRegExpCharacter(ch, previousIsBackslash);
+              previousIsBackslash = false;
+            }
+          }
+          return '/' + result + '/' + flags;
+        }
+        return result;
+      }
+      function escapeAllowedCharacter(code, next) {
+        var hex;
+        if (code === 8) {
+          return '\\b';
+        }
+        if (code === 12) {
+          return '\\f';
+        }
+        if (code === 9) {
+          return '\\t';
+        }
+        hex = code.toString(16).toUpperCase();
+        if (json || code > 255) {
+          return '\\u' + '0000'.slice(hex.length) + hex;
+        } else if (code === 0 && !esutils.code.isDecimalDigit(next)) {
+          return '\\0';
+        } else if (code === 11) {
+          return '\\x0B';
+        } else {
+          return '\\x' + '00'.slice(hex.length) + hex;
+        }
+      }
+      function escapeDisallowedCharacter(code) {
+        if (code === 92) {
+          return '\\\\';
+        }
+        if (code === 10) {
+          return '\\n';
+        }
+        if (code === 13) {
+          return '\\r';
+        }
+        if (code === 8232) {
+          return '\\u2028';
+        }
+        if (code === 8233) {
+          return '\\u2029';
+        }
+        throw new Error('Incorrectly classified character');
+      }
+      function escapeDirective(str) {
+        var i, iz, code, quote;
+        quote = quotes === 'double' ? '"' : "'";
+        for (i = 0, iz = str.length; i < iz; ++i) {
+          code = str.charCodeAt(i);
+          if (code === 39) {
+            quote = '"';
+            break;
+          } else if (code === 34) {
+            quote = "'";
+            break;
+          } else if (code === 92) {
+            ++i;
+          }
+        }
+        return quote + str + quote;
+      }
+      function escapeString(str) {
+        var result = '', i, len, code, singleQuotes = 0, doubleQuotes = 0, single, quote;
+        for (i = 0, len = str.length; i < len; ++i) {
+          code = str.charCodeAt(i);
+          if (code === 39) {
+            ++singleQuotes;
+          } else if (code === 34) {
+            ++doubleQuotes;
+          } else if (code === 47 && json) {
+            result += '\\';
+          } else if (esutils.code.isLineTerminator(code) || code === 92) {
+            result += escapeDisallowedCharacter(code);
+            continue;
+          } else if (!esutils.code.isIdentifierPartES5(code) && (json && code < 32 || !json && !escapeless && (code < 32 || code > 126))) {
+            result += escapeAllowedCharacter(code, str.charCodeAt(i + 1));
+            continue;
+          }
+          result += String.fromCharCode(code);
+        }
+        single = !(quotes === 'double' || quotes === 'auto' && doubleQuotes < singleQuotes);
+        quote = single ? "'" : '"';
+        if (!(single ? singleQuotes : doubleQuotes)) {
+          return quote + result + quote;
+        }
+        str = result;
+        result = quote;
+        for (i = 0, len = str.length; i < len; ++i) {
+          code = str.charCodeAt(i);
+          if (code === 39 && single || code === 34 && !single) {
+            result += '\\';
+          }
+          result += String.fromCharCode(code);
+        }
+        return result + quote;
+      }
+      function flattenToString(arr) {
+        var i, iz, elem, result = '';
+        for (i = 0, iz = arr.length; i < iz; ++i) {
+          elem = arr[i];
+          result += isArray(elem) ? flattenToString(elem) : elem;
+        }
+        return result;
+      }
+      function toSourceNodeWhenNeeded(generated, node) {
+        if (!sourceMap) {
+          if (isArray(generated)) {
+            return flattenToString(generated);
+          } else {
+            return generated;
+          }
+        }
+        if (node == null) {
+          if (generated instanceof SourceNode) {
+            return generated;
+          } else {
+            node = {};
+          }
+        }
+        if (node.loc == null) {
+          return new SourceNode(null, null, sourceMap, generated, node.name || null);
+        }
+        return new SourceNode(node.loc.start.line, node.loc.start.column, sourceMap === true ? node.loc.source || null : sourceMap, generated, node.name || null);
+      }
+      function noEmptySpace() {
+        return space ? space : ' ';
+      }
+      function join(left, right) {
+        var leftSource, rightSource, leftCharCode, rightCharCode;
+        leftSource = toSourceNodeWhenNeeded(left).toString();
+        if (leftSource.length === 0) {
+          return [right];
+        }
+        rightSource = toSourceNodeWhenNeeded(right).toString();
+        if (rightSource.length === 0) {
+          return [left];
+        }
+        leftCharCode = leftSource.charCodeAt(leftSource.length - 1);
+        rightCharCode = rightSource.charCodeAt(0);
+        if ((leftCharCode === 43 || leftCharCode === 45) && leftCharCode === rightCharCode || esutils.code.isIdentifierPartES5(leftCharCode) && esutils.code.isIdentifierPartES5(rightCharCode) || leftCharCode === 47 && rightCharCode === 105) {
+          return [
+            left,
+            noEmptySpace(),
+            right
+          ];
+        } else if (esutils.code.isWhiteSpace(leftCharCode) || esutils.code.isLineTerminator(leftCharCode) || esutils.code.isWhiteSpace(rightCharCode) || esutils.code.isLineTerminator(rightCharCode)) {
+          return [
+            left,
+            right
+          ];
+        }
+        return [
+          left,
+          space,
+          right
+        ];
+      }
+      function addIndent(stmt) {
+        return [
+          base,
+          stmt
+        ];
+      }
+      function withIndent(fn) {
+        var previousBase;
+        previousBase = base;
+        base += indent;
+        fn(base);
+        base = previousBase;
+      }
+      function calculateSpaces(str) {
+        var i;
+        for (i = str.length - 1; i >= 0; --i) {
+          if (esutils.code.isLineTerminator(str.charCodeAt(i))) {
+            break;
+          }
+        }
+        return str.length - 1 - i;
+      }
+      function adjustMultilineComment(value, specialBase) {
+        var array, i, len, line, j, spaces, previousBase, sn;
+        array = value.split(/\r\n|[\r\n]/);
+        spaces = Number.MAX_VALUE;
+        for (i = 1, len = array.length; i < len; ++i) {
+          line = array[i];
+          j = 0;
+          while (j < line.length && esutils.code.isWhiteSpace(line.charCodeAt(j))) {
+            ++j;
+          }
+          if (spaces > j) {
+            spaces = j;
+          }
+        }
+        if (typeof specialBase !== 'undefined') {
+          previousBase = base;
+          if (array[1][spaces] === '*') {
+            specialBase += ' ';
+          }
+          base = specialBase;
+        } else {
+          if (spaces & 1) {
+            --spaces;
+          }
+          previousBase = base;
+        }
+        for (i = 1, len = array.length; i < len; ++i) {
+          sn = toSourceNodeWhenNeeded(addIndent(array[i].slice(spaces)));
+          array[i] = sourceMap ? sn.join('') : sn;
+        }
+        base = previousBase;
+        return array.join('\n');
+      }
+      function generateComment(comment, specialBase) {
+        if (comment.type === 'Line') {
+          if (endsWithLineTerminator(comment.value)) {
+            return '//' + comment.value;
+          } else {
+            var result = '//' + comment.value;
+            if (!preserveBlankLines) {
+              result += '\n';
+            }
+            return result;
+          }
+        }
+        if (extra.format.indent.adjustMultilineComment && /[\n\r]/.test(comment.value)) {
+          return adjustMultilineComment('/*' + comment.value + '*/', specialBase);
+        }
+        return '/*' + comment.value + '*/';
+      }
+      function addComments(stmt, result) {
+        var i, len, comment, save, tailingToStatement, specialBase, fragment, extRange, range, prevRange, prefix, infix, suffix, count;
+        if (stmt.leadingComments && stmt.leadingComments.length > 0) {
+          save = result;
+          if (preserveBlankLines) {
+            comment = stmt.leadingComments[0];
+            result = [];
+            extRange = comment.extendedRange;
+            range = comment.range;
+            prefix = sourceCode.substring(extRange[0], range[0]);
+            count = (prefix.match(/\n/g) || []).length;
+            if (count > 0) {
+              result.push(stringRepeat('\n', count));
+              result.push(addIndent(generateComment(comment)));
+            } else {
+              result.push(prefix);
+              result.push(generateComment(comment));
+            }
+            prevRange = range;
+            for (i = 1, len = stmt.leadingComments.length; i < len; i++) {
+              comment = stmt.leadingComments[i];
+              range = comment.range;
+              infix = sourceCode.substring(prevRange[1], range[0]);
+              count = (infix.match(/\n/g) || []).length;
+              result.push(stringRepeat('\n', count));
+              result.push(addIndent(generateComment(comment)));
+              prevRange = range;
+            }
+            suffix = sourceCode.substring(range[1], extRange[1]);
+            count = (suffix.match(/\n/g) || []).length;
+            result.push(stringRepeat('\n', count));
+          } else {
+            comment = stmt.leadingComments[0];
+            result = [];
+            if (safeConcatenation && stmt.type === Syntax.Program && stmt.body.length === 0) {
+              result.push('\n');
+            }
+            result.push(generateComment(comment));
+            if (!endsWithLineTerminator(toSourceNodeWhenNeeded(result).toString())) {
+              result.push('\n');
+            }
+            for (i = 1, len = stmt.leadingComments.length; i < len; ++i) {
+              comment = stmt.leadingComments[i];
+              fragment = [generateComment(comment)];
+              if (!endsWithLineTerminator(toSourceNodeWhenNeeded(fragment).toString())) {
+                fragment.push('\n');
+              }
+              result.push(addIndent(fragment));
+            }
+          }
+          result.push(addIndent(save));
+        }
+        if (stmt.trailingComments) {
+          if (preserveBlankLines) {
+            comment = stmt.trailingComments[0];
+            extRange = comment.extendedRange;
+            range = comment.range;
+            prefix = sourceCode.substring(extRange[0], range[0]);
+            count = (prefix.match(/\n/g) || []).length;
+            if (count > 0) {
+              result.push(stringRepeat('\n', count));
+              result.push(addIndent(generateComment(comment)));
+            } else {
+              result.push(prefix);
+              result.push(generateComment(comment));
+            }
+          } else {
+            tailingToStatement = !endsWithLineTerminator(toSourceNodeWhenNeeded(result).toString());
+            specialBase = stringRepeat(' ', calculateSpaces(toSourceNodeWhenNeeded([
+              base,
+              result,
+              indent
+            ]).toString()));
+            for (i = 0, len = stmt.trailingComments.length; i < len; ++i) {
+              comment = stmt.trailingComments[i];
+              if (tailingToStatement) {
+                if (i === 0) {
+                  result = [
+                    result,
+                    indent
+                  ];
+                } else {
+                  result = [
+                    result,
+                    specialBase
+                  ];
+                }
+                result.push(generateComment(comment, specialBase));
+              } else {
+                result = [
+                  result,
+                  addIndent(generateComment(comment))
+                ];
+              }
+              if (i !== len - 1 && !endsWithLineTerminator(toSourceNodeWhenNeeded(result).toString())) {
+                result = [
+                  result,
+                  '\n'
+                ];
+              }
+            }
+          }
+        }
+        return result;
+      }
+      function generateBlankLines(start, end, result) {
+        var j, newlineCount = 0;
+        for (j = start; j < end; j++) {
+          if (sourceCode[j] === '\n') {
+            newlineCount++;
+          }
+        }
+        for (j = 1; j < newlineCount; j++) {
+          result.push(newline);
+        }
+      }
+      function parenthesize(text, current, should) {
+        if (current < should) {
+          return [
+            '(',
+            text,
+            ')'
+          ];
+        }
+        return text;
+      }
+      function generateVerbatimString(string) {
+        var i, iz, result;
+        result = string.split(/\r\n|\n/);
+        for (i = 1, iz = result.length; i < iz; i++) {
+          result[i] = newline + base + result[i];
+        }
+        return result;
+      }
+      function generateVerbatim(expr, precedence) {
+        var verbatim, result, prec;
+        verbatim = expr[extra.verbatim];
+        if (typeof verbatim === 'string') {
+          result = parenthesize(generateVerbatimString(verbatim), Precedence.Sequence, precedence);
+        } else {
+          result = generateVerbatimString(verbatim.content);
+          prec = verbatim.precedence != null ? verbatim.precedence : Precedence.Sequence;
+          result = parenthesize(result, prec, precedence);
+        }
+        return toSourceNodeWhenNeeded(result, expr);
+      }
+      function CodeGenerator() {
+      }
+      CodeGenerator.prototype.maybeBlock = function (stmt, flags) {
+        var result, noLeadingComment, that = this;
+        noLeadingComment = !extra.comment || !stmt.leadingComments;
+        if (stmt.type === Syntax.BlockStatement && noLeadingComment) {
+          return [
+            space,
+            this.generateStatement(stmt, flags)
+          ];
+        }
+        if (stmt.type === Syntax.EmptyStatement && noLeadingComment) {
+          return ';';
+        }
+        withIndent(function () {
+          result = [
+            newline,
+            addIndent(that.generateStatement(stmt, flags))
+          ];
+        });
+        return result;
+      };
+      CodeGenerator.prototype.maybeBlockSuffix = function (stmt, result) {
+        var ends = endsWithLineTerminator(toSourceNodeWhenNeeded(result).toString());
+        if (stmt.type === Syntax.BlockStatement && (!extra.comment || !stmt.leadingComments) && !ends) {
+          return [
+            result,
+            space
+          ];
+        }
+        if (ends) {
+          return [
+            result,
+            base
+          ];
+        }
+        return [
+          result,
+          newline,
+          base
+        ];
+      };
+      function generateIdentifier(node) {
+        return toSourceNodeWhenNeeded(node.name, node);
+      }
+      function generateAsyncPrefix(node, spaceRequired) {
+        return node.async ? 'async' + (spaceRequired ? noEmptySpace() : space) : '';
+      }
+      function generateStarSuffix(node) {
+        var isGenerator = node.generator && !extra.moz.starlessGenerator;
+        return isGenerator ? '*' + space : '';
+      }
+      function generateMethodPrefix(prop) {
+        var func = prop.value;
+        if (func.async) {
+          return generateAsyncPrefix(func, !prop.computed);
+        } else {
+          return generateStarSuffix(func) ? '*' : '';
+        }
+      }
+      CodeGenerator.prototype.generatePattern = function (node, precedence, flags) {
+        if (node.type === Syntax.Identifier) {
+          return generateIdentifier(node);
+        }
+        return this.generateExpression(node, precedence, flags);
+      };
+      CodeGenerator.prototype.generateFunctionParams = function (node) {
+        var i, iz, result, hasDefault;
+        hasDefault = false;
+        if (node.type === Syntax.ArrowFunctionExpression && !node.rest && (!node.defaults || node.defaults.length === 0) && node.params.length === 1 && node.params[0].type === Syntax.Identifier) {
+          result = [
+            generateAsyncPrefix(node, true),
+            generateIdentifier(node.params[0])
+          ];
+        } else {
+          result = node.type === Syntax.ArrowFunctionExpression ? [generateAsyncPrefix(node, false)] : [];
+          result.push('(');
+          if (node.defaults) {
+            hasDefault = true;
+          }
+          for (i = 0, iz = node.params.length; i < iz; ++i) {
+            if (hasDefault && node.defaults[i]) {
+              result.push(this.generateAssignment(node.params[i], node.defaults[i], '=', Precedence.Assignment, E_TTT));
+            } else {
+              result.push(this.generatePattern(node.params[i], Precedence.Assignment, E_TTT));
+            }
+            if (i + 1 < iz) {
+              result.push(',' + space);
+            }
+          }
+          if (node.rest) {
+            if (node.params.length) {
+              result.push(',' + space);
+            }
+            result.push('...');
+            result.push(generateIdentifier(node.rest));
+          }
+          result.push(')');
+        }
+        return result;
+      };
+      CodeGenerator.prototype.generateFunctionBody = function (node) {
+        var result, expr;
+        result = this.generateFunctionParams(node);
+        if (node.type === Syntax.ArrowFunctionExpression) {
+          result.push(space);
+          result.push('=>');
+        }
+        if (node.expression) {
+          result.push(space);
+          expr = this.generateExpression(node.body, Precedence.Assignment, E_TTT);
+          if (expr.toString().charAt(0) === '{') {
+            expr = [
+              '(',
+              expr,
+              ')'
+            ];
+          }
+          result.push(expr);
+        } else {
+          result.push(this.maybeBlock(node.body, S_TTFF));
+        }
+        return result;
+      };
+      CodeGenerator.prototype.generateIterationForStatement = function (operator, stmt, flags) {
+        var result = ['for' + space + '('], that = this;
+        withIndent(function () {
+          if (stmt.left.type === Syntax.VariableDeclaration) {
+            withIndent(function () {
+              result.push(stmt.left.kind + noEmptySpace());
+              result.push(that.generateStatement(stmt.left.declarations[0], S_FFFF));
+            });
+          } else {
+            result.push(that.generateExpression(stmt.left, Precedence.Call, E_TTT));
+          }
+          result = join(result, operator);
+          result = [
+            join(result, that.generateExpression(stmt.right, Precedence.Sequence, E_TTT)),
+            ')'
+          ];
+        });
+        result.push(this.maybeBlock(stmt.body, flags));
+        return result;
+      };
+      CodeGenerator.prototype.generatePropertyKey = function (expr, computed, value) {
+        var result = [];
+        if (computed) {
+          result.push('[');
+        }
+        if (value.type === 'AssignmentPattern') {
+          result.push(this.AssignmentPattern(value, Precedence.Sequence, E_TTT));
+        } else {
+          result.push(this.generateExpression(expr, Precedence.Sequence, E_TTT));
+        }
+        if (computed) {
+          result.push(']');
+        }
+        return result;
+      };
+      CodeGenerator.prototype.generateAssignment = function (left, right, operator, precedence, flags) {
+        if (Precedence.Assignment < precedence) {
+          flags |= F_ALLOW_IN;
+        }
+        return parenthesize([
+          this.generateExpression(left, Precedence.Call, flags),
+          space + operator + space,
+          this.generateExpression(right, Precedence.Assignment, flags)
+        ], Precedence.Assignment, precedence);
+      };
+      CodeGenerator.prototype.semicolon = function (flags) {
+        if (!semicolons && flags & F_SEMICOLON_OPT) {
+          return '';
+        }
+        return ';';
+      };
+      CodeGenerator.Statement = {
+        BlockStatement: function (stmt, flags) {
+          var range, content, result = [
+              '{',
+              newline
+            ], that = this;
+          withIndent(function () {
+            if (stmt.body.length === 0 && preserveBlankLines) {
+              range = stmt.range;
+              if (range[1] - range[0] > 2) {
+                content = sourceCode.substring(range[0] + 1, range[1] - 1);
+                if (content[0] === '\n') {
+                  result = ['{'];
+                }
+                result.push(content);
+              }
+            }
+            var i, iz, fragment, bodyFlags;
+            bodyFlags = S_TFFF;
+            if (flags & F_FUNC_BODY) {
+              bodyFlags |= F_DIRECTIVE_CTX;
+            }
+            for (i = 0, iz = stmt.body.length; i < iz; ++i) {
+              if (preserveBlankLines) {
+                if (i === 0) {
+                  if (stmt.body[0].leadingComments) {
+                    range = stmt.body[0].leadingComments[0].extendedRange;
+                    content = sourceCode.substring(range[0], range[1]);
+                    if (content[0] === '\n') {
+                      result = ['{'];
+                    }
+                  }
+                  if (!stmt.body[0].leadingComments) {
+                    generateBlankLines(stmt.range[0], stmt.body[0].range[0], result);
+                  }
+                }
+                if (i > 0) {
+                  if (!stmt.body[i - 1].trailingComments && !stmt.body[i].leadingComments) {
+                    generateBlankLines(stmt.body[i - 1].range[1], stmt.body[i].range[0], result);
+                  }
+                }
+              }
+              if (i === iz - 1) {
+                bodyFlags |= F_SEMICOLON_OPT;
+              }
+              if (stmt.body[i].leadingComments && preserveBlankLines) {
+                fragment = that.generateStatement(stmt.body[i], bodyFlags);
+              } else {
+                fragment = addIndent(that.generateStatement(stmt.body[i], bodyFlags));
+              }
+              result.push(fragment);
+              if (!endsWithLineTerminator(toSourceNodeWhenNeeded(fragment).toString())) {
+                if (preserveBlankLines && i < iz - 1) {
+                  if (!stmt.body[i + 1].leadingComments) {
+                    result.push(newline);
+                  }
+                } else {
+                  result.push(newline);
+                }
+              }
+              if (preserveBlankLines) {
+                if (i === iz - 1) {
+                  if (!stmt.body[i].trailingComments) {
+                    generateBlankLines(stmt.body[i].range[1], stmt.range[1], result);
+                  }
+                }
+              }
+            }
+          });
+          result.push(addIndent('}'));
+          return result;
+        },
+        BreakStatement: function (stmt, flags) {
+          if (stmt.label) {
+            return 'break ' + stmt.label.name + this.semicolon(flags);
+          }
+          return 'break' + this.semicolon(flags);
+        },
+        ContinueStatement: function (stmt, flags) {
+          if (stmt.label) {
+            return 'continue ' + stmt.label.name + this.semicolon(flags);
+          }
+          return 'continue' + this.semicolon(flags);
+        },
+        ClassBody: function (stmt, flags) {
+          var result = [
+              '{',
+              newline
+            ], that = this;
+          withIndent(function (indent) {
+            var i, iz;
+            for (i = 0, iz = stmt.body.length; i < iz; ++i) {
+              result.push(indent);
+              result.push(that.generateExpression(stmt.body[i], Precedence.Sequence, E_TTT));
+              if (i + 1 < iz) {
+                result.push(newline);
+              }
+            }
+          });
+          if (!endsWithLineTerminator(toSourceNodeWhenNeeded(result).toString())) {
+            result.push(newline);
+          }
+          result.push(base);
+          result.push('}');
+          return result;
+        },
+        ClassDeclaration: function (stmt, flags) {
+          var result, fragment;
+          result = ['class'];
+          if (stmt.id) {
+            result = join(result, this.generateExpression(stmt.id, Precedence.Sequence, E_TTT));
+          }
+          if (stmt.superClass) {
+            fragment = join('extends', this.generateExpression(stmt.superClass, Precedence.Assignment, E_TTT));
+            result = join(result, fragment);
+          }
+          result.push(space);
+          result.push(this.generateStatement(stmt.body, S_TFFT));
+          return result;
+        },
+        DirectiveStatement: function (stmt, flags) {
+          if (extra.raw && stmt.raw) {
+            return stmt.raw + this.semicolon(flags);
+          }
+          return escapeDirective(stmt.directive) + this.semicolon(flags);
+        },
+        DoWhileStatement: function (stmt, flags) {
+          var result = join('do', this.maybeBlock(stmt.body, S_TFFF));
+          result = this.maybeBlockSuffix(stmt.body, result);
+          return join(result, [
+            'while' + space + '(',
+            this.generateExpression(stmt.test, Precedence.Sequence, E_TTT),
+            ')' + this.semicolon(flags)
+          ]);
+        },
+        CatchClause: function (stmt, flags) {
+          var result, that = this;
+          withIndent(function () {
+            var guard;
+            result = [
+              'catch' + space + '(',
+              that.generateExpression(stmt.param, Precedence.Sequence, E_TTT),
+              ')'
+            ];
+            if (stmt.guard) {
+              guard = that.generateExpression(stmt.guard, Precedence.Sequence, E_TTT);
+              result.splice(2, 0, ' if ', guard);
+            }
+          });
+          result.push(this.maybeBlock(stmt.body, S_TFFF));
+          return result;
+        },
+        DebuggerStatement: function (stmt, flags) {
+          return 'debugger' + this.semicolon(flags);
+        },
+        EmptyStatement: function (stmt, flags) {
+          return ';';
+        },
+        ExportDefaultDeclaration: function (stmt, flags) {
+          var result = ['export'], bodyFlags;
+          bodyFlags = flags & F_SEMICOLON_OPT ? S_TFFT : S_TFFF;
+          result = join(result, 'default');
+          if (isStatement(stmt.declaration)) {
+            result = join(result, this.generateStatement(stmt.declaration, bodyFlags));
+          } else {
+            result = join(result, this.generateExpression(stmt.declaration, Precedence.Assignment, E_TTT) + this.semicolon(flags));
+          }
+          return result;
+        },
+        ExportNamedDeclaration: function (stmt, flags) {
+          var result = ['export'], bodyFlags, that = this;
+          bodyFlags = flags & F_SEMICOLON_OPT ? S_TFFT : S_TFFF;
+          if (stmt.declaration) {
+            return join(result, this.generateStatement(stmt.declaration, bodyFlags));
+          }
+          if (stmt.specifiers) {
+            if (stmt.specifiers.length === 0) {
+              result = join(result, '{' + space + '}');
+            } else if (stmt.specifiers[0].type === Syntax.ExportBatchSpecifier) {
+              result = join(result, this.generateExpression(stmt.specifiers[0], Precedence.Sequence, E_TTT));
+            } else {
+              result = join(result, '{');
+              withIndent(function (indent) {
+                var i, iz;
+                result.push(newline);
+                for (i = 0, iz = stmt.specifiers.length; i < iz; ++i) {
+                  result.push(indent);
+                  result.push(that.generateExpression(stmt.specifiers[i], Precedence.Sequence, E_TTT));
+                  if (i + 1 < iz) {
+                    result.push(',' + newline);
+                  }
+                }
+              });
+              if (!endsWithLineTerminator(toSourceNodeWhenNeeded(result).toString())) {
+                result.push(newline);
+              }
+              result.push(base + '}');
+            }
+            if (stmt.source) {
+              result = join(result, [
+                'from' + space,
+                this.generateExpression(stmt.source, Precedence.Sequence, E_TTT),
+                this.semicolon(flags)
+              ]);
+            } else {
+              result.push(this.semicolon(flags));
+            }
+          }
+          return result;
+        },
+        ExportAllDeclaration: function (stmt, flags) {
+          return [
+            'export' + space,
+            '*' + space,
+            'from' + space,
+            this.generateExpression(stmt.source, Precedence.Sequence, E_TTT),
+            this.semicolon(flags)
+          ];
+        },
+        ExpressionStatement: function (stmt, flags) {
+          var result, fragment;
+          function isClassPrefixed(fragment) {
+            var code;
+            if (fragment.slice(0, 5) !== 'class') {
+              return false;
+            }
+            code = fragment.charCodeAt(5);
+            return code === 123 || esutils.code.isWhiteSpace(code) || esutils.code.isLineTerminator(code);
+          }
+          function isFunctionPrefixed(fragment) {
+            var code;
+            if (fragment.slice(0, 8) !== 'function') {
+              return false;
+            }
+            code = fragment.charCodeAt(8);
+            return code === 40 || esutils.code.isWhiteSpace(code) || code === 42 || esutils.code.isLineTerminator(code);
+          }
+          function isAsyncPrefixed(fragment) {
+            var code, i, iz;
+            if (fragment.slice(0, 5) !== 'async') {
+              return false;
+            }
+            if (!esutils.code.isWhiteSpace(fragment.charCodeAt(5))) {
+              return false;
+            }
+            for (i = 6, iz = fragment.length; i < iz; ++i) {
+              if (!esutils.code.isWhiteSpace(fragment.charCodeAt(i))) {
+                break;
+              }
+            }
+            if (i === iz) {
+              return false;
+            }
+            if (fragment.slice(i, i + 8) !== 'function') {
+              return false;
+            }
+            code = fragment.charCodeAt(i + 8);
+            return code === 40 || esutils.code.isWhiteSpace(code) || code === 42 || esutils.code.isLineTerminator(code);
+          }
+          result = [this.generateExpression(stmt.expression, Precedence.Sequence, E_TTT)];
+          fragment = toSourceNodeWhenNeeded(result).toString();
+          if (fragment.charCodeAt(0) === 123 || isClassPrefixed(fragment) || isFunctionPrefixed(fragment) || isAsyncPrefixed(fragment) || directive && flags & F_DIRECTIVE_CTX && stmt.expression.type === Syntax.Literal && typeof stmt.expression.value === 'string') {
+            result = [
+              '(',
+              result,
+              ')' + this.semicolon(flags)
+            ];
+          } else {
+            result.push(this.semicolon(flags));
+          }
+          return result;
+        },
+        ImportDeclaration: function (stmt, flags) {
+          var result, cursor, that = this;
+          if (stmt.specifiers.length === 0) {
+            return [
+              'import',
+              space,
+              this.generateExpression(stmt.source, Precedence.Sequence, E_TTT),
+              this.semicolon(flags)
+            ];
+          }
+          result = ['import'];
+          cursor = 0;
+          if (stmt.specifiers[cursor].type === Syntax.ImportDefaultSpecifier) {
+            result = join(result, [this.generateExpression(stmt.specifiers[cursor], Precedence.Sequence, E_TTT)]);
+            ++cursor;
+          }
+          if (stmt.specifiers[cursor]) {
+            if (cursor !== 0) {
+              result.push(',');
+            }
+            if (stmt.specifiers[cursor].type === Syntax.ImportNamespaceSpecifier) {
+              result = join(result, [
+                space,
+                this.generateExpression(stmt.specifiers[cursor], Precedence.Sequence, E_TTT)
+              ]);
+            } else {
+              result.push(space + '{');
+              if (stmt.specifiers.length - cursor === 1) {
+                result.push(space);
+                result.push(this.generateExpression(stmt.specifiers[cursor], Precedence.Sequence, E_TTT));
+                result.push(space + '}' + space);
+              } else {
+                withIndent(function (indent) {
+                  var i, iz;
+                  result.push(newline);
+                  for (i = cursor, iz = stmt.specifiers.length; i < iz; ++i) {
+                    result.push(indent);
+                    result.push(that.generateExpression(stmt.specifiers[i], Precedence.Sequence, E_TTT));
+                    if (i + 1 < iz) {
+                      result.push(',' + newline);
+                    }
+                  }
+                });
+                if (!endsWithLineTerminator(toSourceNodeWhenNeeded(result).toString())) {
+                  result.push(newline);
+                }
+                result.push(base + '}' + space);
+              }
+            }
+          }
+          result = join(result, [
+            'from' + space,
+            this.generateExpression(stmt.source, Precedence.Sequence, E_TTT),
+            this.semicolon(flags)
+          ]);
+          return result;
+        },
+        VariableDeclarator: function (stmt, flags) {
+          var itemFlags = flags & F_ALLOW_IN ? E_TTT : E_FTT;
+          if (stmt.init) {
+            return [
+              this.generateExpression(stmt.id, Precedence.Assignment, itemFlags),
+              space,
+              '=',
+              space,
+              this.generateExpression(stmt.init, Precedence.Assignment, itemFlags)
+            ];
+          }
+          return this.generatePattern(stmt.id, Precedence.Assignment, itemFlags);
+        },
+        VariableDeclaration: function (stmt, flags) {
+          var result, i, iz, node, bodyFlags, that = this;
+          result = [stmt.kind];
+          bodyFlags = flags & F_ALLOW_IN ? S_TFFF : S_FFFF;
+          function block() {
+            node = stmt.declarations[0];
+            if (extra.comment && node.leadingComments) {
+              result.push('\n');
+              result.push(addIndent(that.generateStatement(node, bodyFlags)));
+            } else {
+              result.push(noEmptySpace());
+              result.push(that.generateStatement(node, bodyFlags));
+            }
+            for (i = 1, iz = stmt.declarations.length; i < iz; ++i) {
+              node = stmt.declarations[i];
+              if (extra.comment && node.leadingComments) {
+                result.push(',' + newline);
+                result.push(addIndent(that.generateStatement(node, bodyFlags)));
+              } else {
+                result.push(',' + space);
+                result.push(that.generateStatement(node, bodyFlags));
+              }
+            }
+          }
+          if (stmt.declarations.length > 1) {
+            withIndent(block);
+          } else {
+            block();
+          }
+          result.push(this.semicolon(flags));
+          return result;
+        },
+        ThrowStatement: function (stmt, flags) {
+          return [
+            join('throw', this.generateExpression(stmt.argument, Precedence.Sequence, E_TTT)),
+            this.semicolon(flags)
+          ];
+        },
+        TryStatement: function (stmt, flags) {
+          var result, i, iz, guardedHandlers;
+          result = [
+            'try',
+            this.maybeBlock(stmt.block, S_TFFF)
+          ];
+          result = this.maybeBlockSuffix(stmt.block, result);
+          if (stmt.handlers) {
+            for (i = 0, iz = stmt.handlers.length; i < iz; ++i) {
+              result = join(result, this.generateStatement(stmt.handlers[i], S_TFFF));
+              if (stmt.finalizer || i + 1 !== iz) {
+                result = this.maybeBlockSuffix(stmt.handlers[i].body, result);
+              }
+            }
+          } else {
+            guardedHandlers = stmt.guardedHandlers || [];
+            for (i = 0, iz = guardedHandlers.length; i < iz; ++i) {
+              result = join(result, this.generateStatement(guardedHandlers[i], S_TFFF));
+              if (stmt.finalizer || i + 1 !== iz) {
+                result = this.maybeBlockSuffix(guardedHandlers[i].body, result);
+              }
+            }
+            if (stmt.handler) {
+              if (isArray(stmt.handler)) {
+                for (i = 0, iz = stmt.handler.length; i < iz; ++i) {
+                  result = join(result, this.generateStatement(stmt.handler[i], S_TFFF));
+                  if (stmt.finalizer || i + 1 !== iz) {
+                    result = this.maybeBlockSuffix(stmt.handler[i].body, result);
+                  }
+                }
+              } else {
+                result = join(result, this.generateStatement(stmt.handler, S_TFFF));
+                if (stmt.finalizer) {
+                  result = this.maybeBlockSuffix(stmt.handler.body, result);
+                }
+              }
+            }
+          }
+          if (stmt.finalizer) {
+            result = join(result, [
+              'finally',
+              this.maybeBlock(stmt.finalizer, S_TFFF)
+            ]);
+          }
+          return result;
+        },
+        SwitchStatement: function (stmt, flags) {
+          var result, fragment, i, iz, bodyFlags, that = this;
+          withIndent(function () {
+            result = [
+              'switch' + space + '(',
+              that.generateExpression(stmt.discriminant, Precedence.Sequence, E_TTT),
+              ')' + space + '{' + newline
+            ];
+          });
+          if (stmt.cases) {
+            bodyFlags = S_TFFF;
+            for (i = 0, iz = stmt.cases.length; i < iz; ++i) {
+              if (i === iz - 1) {
+                bodyFlags |= F_SEMICOLON_OPT;
+              }
+              fragment = addIndent(this.generateStatement(stmt.cases[i], bodyFlags));
+              result.push(fragment);
+              if (!endsWithLineTerminator(toSourceNodeWhenNeeded(fragment).toString())) {
+                result.push(newline);
+              }
+            }
+          }
+          result.push(addIndent('}'));
+          return result;
+        },
+        SwitchCase: function (stmt, flags) {
+          var result, fragment, i, iz, bodyFlags, that = this;
+          withIndent(function () {
+            if (stmt.test) {
+              result = [
+                join('case', that.generateExpression(stmt.test, Precedence.Sequence, E_TTT)),
+                ':'
+              ];
+            } else {
+              result = ['default:'];
+            }
+            i = 0;
+            iz = stmt.consequent.length;
+            if (iz && stmt.consequent[0].type === Syntax.BlockStatement) {
+              fragment = that.maybeBlock(stmt.consequent[0], S_TFFF);
+              result.push(fragment);
+              i = 1;
+            }
+            if (i !== iz && !endsWithLineTerminator(toSourceNodeWhenNeeded(result).toString())) {
+              result.push(newline);
+            }
+            bodyFlags = S_TFFF;
+            for (; i < iz; ++i) {
+              if (i === iz - 1 && flags & F_SEMICOLON_OPT) {
+                bodyFlags |= F_SEMICOLON_OPT;
+              }
+              fragment = addIndent(that.generateStatement(stmt.consequent[i], bodyFlags));
+              result.push(fragment);
+              if (i + 1 !== iz && !endsWithLineTerminator(toSourceNodeWhenNeeded(fragment).toString())) {
+                result.push(newline);
+              }
+            }
+          });
+          return result;
+        },
+        IfStatement: function (stmt, flags) {
+          var result, bodyFlags, semicolonOptional, that = this;
+          withIndent(function () {
+            result = [
+              'if' + space + '(',
+              that.generateExpression(stmt.test, Precedence.Sequence, E_TTT),
+              ')'
+            ];
+          });
+          semicolonOptional = flags & F_SEMICOLON_OPT;
+          bodyFlags = S_TFFF;
+          if (semicolonOptional) {
+            bodyFlags |= F_SEMICOLON_OPT;
+          }
+          if (stmt.alternate) {
+            result.push(this.maybeBlock(stmt.consequent, S_TFFF));
+            result = this.maybeBlockSuffix(stmt.consequent, result);
+            if (stmt.alternate.type === Syntax.IfStatement) {
+              result = join(result, [
+                'else ',
+                this.generateStatement(stmt.alternate, bodyFlags)
+              ]);
+            } else {
+              result = join(result, join('else', this.maybeBlock(stmt.alternate, bodyFlags)));
+            }
+          } else {
+            result.push(this.maybeBlock(stmt.consequent, bodyFlags));
+          }
+          return result;
+        },
+        ForStatement: function (stmt, flags) {
+          var result, that = this;
+          withIndent(function () {
+            result = ['for' + space + '('];
+            if (stmt.init) {
+              if (stmt.init.type === Syntax.VariableDeclaration) {
+                result.push(that.generateStatement(stmt.init, S_FFFF));
+              } else {
+                result.push(that.generateExpression(stmt.init, Precedence.Sequence, E_FTT));
+                result.push(';');
+              }
+            } else {
+              result.push(';');
+            }
+            if (stmt.test) {
+              result.push(space);
+              result.push(that.generateExpression(stmt.test, Precedence.Sequence, E_TTT));
+              result.push(';');
+            } else {
+              result.push(';');
+            }
+            if (stmt.update) {
+              result.push(space);
+              result.push(that.generateExpression(stmt.update, Precedence.Sequence, E_TTT));
+              result.push(')');
+            } else {
+              result.push(')');
+            }
+          });
+          result.push(this.maybeBlock(stmt.body, flags & F_SEMICOLON_OPT ? S_TFFT : S_TFFF));
+          return result;
+        },
+        ForInStatement: function (stmt, flags) {
+          return this.generateIterationForStatement('in', stmt, flags & F_SEMICOLON_OPT ? S_TFFT : S_TFFF);
+        },
+        ForOfStatement: function (stmt, flags) {
+          return this.generateIterationForStatement('of', stmt, flags & F_SEMICOLON_OPT ? S_TFFT : S_TFFF);
+        },
+        LabeledStatement: function (stmt, flags) {
+          return [
+            stmt.label.name + ':',
+            this.maybeBlock(stmt.body, flags & F_SEMICOLON_OPT ? S_TFFT : S_TFFF)
+          ];
+        },
+        Program: function (stmt, flags) {
+          var result, fragment, i, iz, bodyFlags;
+          iz = stmt.body.length;
+          result = [safeConcatenation && iz > 0 ? '\n' : ''];
+          bodyFlags = S_TFTF;
+          for (i = 0; i < iz; ++i) {
+            if (!safeConcatenation && i === iz - 1) {
+              bodyFlags |= F_SEMICOLON_OPT;
+            }
+            if (preserveBlankLines) {
+              if (i === 0) {
+                if (!stmt.body[0].leadingComments) {
+                  generateBlankLines(stmt.range[0], stmt.body[i].range[0], result);
+                }
+              }
+              if (i > 0) {
+                if (!stmt.body[i - 1].trailingComments && !stmt.body[i].leadingComments) {
+                  generateBlankLines(stmt.body[i - 1].range[1], stmt.body[i].range[0], result);
+                }
+              }
+            }
+            fragment = addIndent(this.generateStatement(stmt.body[i], bodyFlags));
+            result.push(fragment);
+            if (i + 1 < iz && !endsWithLineTerminator(toSourceNodeWhenNeeded(fragment).toString())) {
+              if (preserveBlankLines) {
+                if (!stmt.body[i + 1].leadingComments) {
+                  result.push(newline);
+                }
+              } else {
+                result.push(newline);
+              }
+            }
+            if (preserveBlankLines) {
+              if (i === iz - 1) {
+                if (!stmt.body[i].trailingComments) {
+                  generateBlankLines(stmt.body[i].range[1], stmt.range[1], result);
+                }
+              }
+            }
+          }
+          return result;
+        },
+        FunctionDeclaration: function (stmt, flags) {
+          return [
+            generateAsyncPrefix(stmt, true),
+            'function',
+            generateStarSuffix(stmt) || noEmptySpace(),
+            stmt.id ? generateIdentifier(stmt.id) : '',
+            this.generateFunctionBody(stmt)
+          ];
+        },
+        ReturnStatement: function (stmt, flags) {
+          if (stmt.argument) {
+            return [
+              join('return', this.generateExpression(stmt.argument, Precedence.Sequence, E_TTT)),
+              this.semicolon(flags)
+            ];
+          }
+          return ['return' + this.semicolon(flags)];
+        },
+        WhileStatement: function (stmt, flags) {
+          var result, that = this;
+          withIndent(function () {
+            result = [
+              'while' + space + '(',
+              that.generateExpression(stmt.test, Precedence.Sequence, E_TTT),
+              ')'
+            ];
+          });
+          result.push(this.maybeBlock(stmt.body, flags & F_SEMICOLON_OPT ? S_TFFT : S_TFFF));
+          return result;
+        },
+        WithStatement: function (stmt, flags) {
+          var result, that = this;
+          withIndent(function () {
+            result = [
+              'with' + space + '(',
+              that.generateExpression(stmt.object, Precedence.Sequence, E_TTT),
+              ')'
+            ];
+          });
+          result.push(this.maybeBlock(stmt.body, flags & F_SEMICOLON_OPT ? S_TFFT : S_TFFF));
+          return result;
+        }
+      };
+      merge(CodeGenerator.prototype, CodeGenerator.Statement);
+      CodeGenerator.Expression = {
+        SequenceExpression: function (expr, precedence, flags) {
+          var result, i, iz;
+          if (Precedence.Sequence < precedence) {
+            flags |= F_ALLOW_IN;
+          }
+          result = [];
+          for (i = 0, iz = expr.expressions.length; i < iz; ++i) {
+            result.push(this.generateExpression(expr.expressions[i], Precedence.Assignment, flags));
+            if (i + 1 < iz) {
+              result.push(',' + space);
+            }
+          }
+          return parenthesize(result, Precedence.Sequence, precedence);
+        },
+        AssignmentExpression: function (expr, precedence, flags) {
+          return this.generateAssignment(expr.left, expr.right, expr.operator, precedence, flags);
+        },
+        ArrowFunctionExpression: function (expr, precedence, flags) {
+          return parenthesize(this.generateFunctionBody(expr), Precedence.ArrowFunction, precedence);
+        },
+        ConditionalExpression: function (expr, precedence, flags) {
+          if (Precedence.Conditional < precedence) {
+            flags |= F_ALLOW_IN;
+          }
+          return parenthesize([
+            this.generateExpression(expr.test, Precedence.LogicalOR, flags),
+            space + '?' + space,
+            this.generateExpression(expr.consequent, Precedence.Assignment, flags),
+            space + ':' + space,
+            this.generateExpression(expr.alternate, Precedence.Assignment, flags)
+          ], Precedence.Conditional, precedence);
+        },
+        LogicalExpression: function (expr, precedence, flags) {
+          return this.BinaryExpression(expr, precedence, flags);
+        },
+        BinaryExpression: function (expr, precedence, flags) {
+          var result, currentPrecedence, fragment, leftSource;
+          currentPrecedence = BinaryPrecedence[expr.operator];
+          if (currentPrecedence < precedence) {
+            flags |= F_ALLOW_IN;
+          }
+          fragment = this.generateExpression(expr.left, currentPrecedence, flags);
+          leftSource = fragment.toString();
+          if (leftSource.charCodeAt(leftSource.length - 1) === 47 && esutils.code.isIdentifierPartES5(expr.operator.charCodeAt(0))) {
+            result = [
+              fragment,
+              noEmptySpace(),
+              expr.operator
+            ];
+          } else {
+            result = join(fragment, expr.operator);
+          }
+          fragment = this.generateExpression(expr.right, currentPrecedence + 1, flags);
+          if (expr.operator === '/' && fragment.toString().charAt(0) === '/' || expr.operator.slice(-1) === '<' && fragment.toString().slice(0, 3) === '!--') {
+            result.push(noEmptySpace());
+            result.push(fragment);
+          } else {
+            result = join(result, fragment);
+          }
+          if (expr.operator === 'in' && !(flags & F_ALLOW_IN)) {
+            return [
+              '(',
+              result,
+              ')'
+            ];
+          }
+          return parenthesize(result, currentPrecedence, precedence);
+        },
+        CallExpression: function (expr, precedence, flags) {
+          var result, i, iz;
+          result = [this.generateExpression(expr.callee, Precedence.Call, E_TTF)];
+          result.push('(');
+          for (i = 0, iz = expr['arguments'].length; i < iz; ++i) {
+            result.push(this.generateExpression(expr['arguments'][i], Precedence.Assignment, E_TTT));
+            if (i + 1 < iz) {
+              result.push(',' + space);
+            }
+          }
+          result.push(')');
+          if (!(flags & F_ALLOW_CALL)) {
+            return [
+              '(',
+              result,
+              ')'
+            ];
+          }
+          return parenthesize(result, Precedence.Call, precedence);
+        },
+        NewExpression: function (expr, precedence, flags) {
+          var result, length, i, iz, itemFlags;
+          length = expr['arguments'].length;
+          itemFlags = flags & F_ALLOW_UNPARATH_NEW && !parentheses && length === 0 ? E_TFT : E_TFF;
+          result = join('new', this.generateExpression(expr.callee, Precedence.New, itemFlags));
+          if (!(flags & F_ALLOW_UNPARATH_NEW) || parentheses || length > 0) {
+            result.push('(');
+            for (i = 0, iz = length; i < iz; ++i) {
+              result.push(this.generateExpression(expr['arguments'][i], Precedence.Assignment, E_TTT));
+              if (i + 1 < iz) {
+                result.push(',' + space);
+              }
+            }
+            result.push(')');
+          }
+          return parenthesize(result, Precedence.New, precedence);
+        },
+        MemberExpression: function (expr, precedence, flags) {
+          var result, fragment;
+          result = [this.generateExpression(expr.object, Precedence.Call, flags & F_ALLOW_CALL ? E_TTF : E_TFF)];
+          if (expr.computed) {
+            result.push('[');
+            result.push(this.generateExpression(expr.property, Precedence.Sequence, flags & F_ALLOW_CALL ? E_TTT : E_TFT));
+            result.push(']');
+          } else {
+            if (expr.object.type === Syntax.Literal && typeof expr.object.value === 'number') {
+              fragment = toSourceNodeWhenNeeded(result).toString();
+              if (fragment.indexOf('.') < 0 && !/[eExX]/.test(fragment) && esutils.code.isDecimalDigit(fragment.charCodeAt(fragment.length - 1)) && !(fragment.length >= 2 && fragment.charCodeAt(0) === 48)) {
+                result.push('.');
+              }
+            }
+            result.push('.');
+            result.push(generateIdentifier(expr.property));
+          }
+          return parenthesize(result, Precedence.Member, precedence);
+        },
+        MetaProperty: function (expr, precedence, flags) {
+          var result;
+          result = [];
+          result.push(expr.meta);
+          result.push('.');
+          result.push(expr.property);
+          return parenthesize(result, Precedence.Member, precedence);
+        },
+        UnaryExpression: function (expr, precedence, flags) {
+          var result, fragment, rightCharCode, leftSource, leftCharCode;
+          fragment = this.generateExpression(expr.argument, Precedence.Unary, E_TTT);
+          if (space === '') {
+            result = join(expr.operator, fragment);
+          } else {
+            result = [expr.operator];
+            if (expr.operator.length > 2) {
+              result = join(result, fragment);
+            } else {
+              leftSource = toSourceNodeWhenNeeded(result).toString();
+              leftCharCode = leftSource.charCodeAt(leftSource.length - 1);
+              rightCharCode = fragment.toString().charCodeAt(0);
+              if ((leftCharCode === 43 || leftCharCode === 45) && leftCharCode === rightCharCode || esutils.code.isIdentifierPartES5(leftCharCode) && esutils.code.isIdentifierPartES5(rightCharCode)) {
+                result.push(noEmptySpace());
+                result.push(fragment);
+              } else {
+                result.push(fragment);
+              }
+            }
+          }
+          return parenthesize(result, Precedence.Unary, precedence);
+        },
+        YieldExpression: function (expr, precedence, flags) {
+          var result;
+          if (expr.delegate) {
+            result = 'yield*';
+          } else {
+            result = 'yield';
+          }
+          if (expr.argument) {
+            result = join(result, this.generateExpression(expr.argument, Precedence.Yield, E_TTT));
+          }
+          return parenthesize(result, Precedence.Yield, precedence);
+        },
+        AwaitExpression: function (expr, precedence, flags) {
+          var result = join(expr.all ? 'await*' : 'await', this.generateExpression(expr.argument, Precedence.Await, E_TTT));
+          return parenthesize(result, Precedence.Await, precedence);
+        },
+        UpdateExpression: function (expr, precedence, flags) {
+          if (expr.prefix) {
+            return parenthesize([
+              expr.operator,
+              this.generateExpression(expr.argument, Precedence.Unary, E_TTT)
+            ], Precedence.Unary, precedence);
+          }
+          return parenthesize([
+            this.generateExpression(expr.argument, Precedence.Postfix, E_TTT),
+            expr.operator
+          ], Precedence.Postfix, precedence);
+        },
+        FunctionExpression: function (expr, precedence, flags) {
+          var result = [
+              generateAsyncPrefix(expr, true),
+              'function'
+            ];
+          if (expr.id) {
+            result.push(generateStarSuffix(expr) || noEmptySpace());
+            result.push(generateIdentifier(expr.id));
+          } else {
+            result.push(generateStarSuffix(expr) || space);
+          }
+          result.push(this.generateFunctionBody(expr));
+          return result;
+        },
+        ArrayPattern: function (expr, precedence, flags) {
+          return this.ArrayExpression(expr, precedence, flags, true);
+        },
+        ArrayExpression: function (expr, precedence, flags, isPattern) {
+          var result, multiline, that = this;
+          if (!expr.elements.length) {
+            return '[]';
+          }
+          multiline = isPattern ? false : expr.elements.length > 1;
+          result = [
+            '[',
+            multiline ? newline : ''
+          ];
+          withIndent(function (indent) {
+            var i, iz;
+            for (i = 0, iz = expr.elements.length; i < iz; ++i) {
+              if (!expr.elements[i]) {
+                if (multiline) {
+                  result.push(indent);
+                }
+                if (i + 1 === iz) {
+                  result.push(',');
+                }
+              } else {
+                result.push(multiline ? indent : '');
+                result.push(that.generateExpression(expr.elements[i], Precedence.Assignment, E_TTT));
+              }
+              if (i + 1 < iz) {
+                result.push(',' + (multiline ? newline : space));
+              }
+            }
+          });
+          if (multiline && !endsWithLineTerminator(toSourceNodeWhenNeeded(result).toString())) {
+            result.push(newline);
+          }
+          result.push(multiline ? base : '');
+          result.push(']');
+          return result;
+        },
+        RestElement: function (expr, precedence, flags) {
+          return '...' + this.generatePattern(expr.argument);
+        },
+        ClassExpression: function (expr, precedence, flags) {
+          var result, fragment;
+          result = ['class'];
+          if (expr.id) {
+            result = join(result, this.generateExpression(expr.id, Precedence.Sequence, E_TTT));
+          }
+          if (expr.superClass) {
+            fragment = join('extends', this.generateExpression(expr.superClass, Precedence.Assignment, E_TTT));
+            result = join(result, fragment);
+          }
+          result.push(space);
+          result.push(this.generateStatement(expr.body, S_TFFT));
+          return result;
+        },
+        MethodDefinition: function (expr, precedence, flags) {
+          var result, fragment;
+          if (expr['static']) {
+            result = ['static' + space];
+          } else {
+            result = [];
+          }
+          if (expr.kind === 'get' || expr.kind === 'set') {
+            fragment = [
+              join(expr.kind, this.generatePropertyKey(expr.key, expr.computed, expr.value)),
+              this.generateFunctionBody(expr.value)
+            ];
+          } else {
+            fragment = [
+              generateMethodPrefix(expr),
+              this.generatePropertyKey(expr.key, expr.computed, expr.value),
+              this.generateFunctionBody(expr.value)
+            ];
+          }
+          return join(result, fragment);
+        },
+        Property: function (expr, precedence, flags) {
+          if (expr.kind === 'get' || expr.kind === 'set') {
+            return [
+              expr.kind,
+              noEmptySpace(),
+              this.generatePropertyKey(expr.key, expr.computed, expr.value),
+              this.generateFunctionBody(expr.value)
+            ];
+          }
+          if (expr.shorthand) {
+            return this.generatePropertyKey(expr.key, expr.computed, expr.value);
+          }
+          if (expr.method) {
+            return [
+              generateMethodPrefix(expr),
+              this.generatePropertyKey(expr.key, expr.computed, expr.value),
+              this.generateFunctionBody(expr.value)
+            ];
+          }
+          return [
+            this.generatePropertyKey(expr.key, expr.computed, expr.value),
+            ':' + space,
+            this.generateExpression(expr.value, Precedence.Assignment, E_TTT)
+          ];
+        },
+        ObjectExpression: function (expr, precedence, flags) {
+          var multiline, result, fragment, that = this;
+          if (!expr.properties.length) {
+            return '{}';
+          }
+          multiline = expr.properties.length > 1;
+          withIndent(function () {
+            fragment = that.generateExpression(expr.properties[0], Precedence.Sequence, E_TTT);
+          });
+          if (!multiline) {
+            if (!hasLineTerminator(toSourceNodeWhenNeeded(fragment).toString())) {
+              return [
+                '{',
+                space,
+                fragment,
+                space,
+                '}'
+              ];
+            }
+          }
+          withIndent(function (indent) {
+            var i, iz;
+            result = [
+              '{',
+              newline,
+              indent,
+              fragment
+            ];
+            if (multiline) {
+              result.push(',' + newline);
+              for (i = 1, iz = expr.properties.length; i < iz; ++i) {
+                result.push(indent);
+                result.push(that.generateExpression(expr.properties[i], Precedence.Sequence, E_TTT));
+                if (i + 1 < iz) {
+                  result.push(',' + newline);
+                }
+              }
+            }
+          });
+          if (!endsWithLineTerminator(toSourceNodeWhenNeeded(result).toString())) {
+            result.push(newline);
+          }
+          result.push(base);
+          result.push('}');
+          return result;
+        },
+        AssignmentPattern: function (expr, precedence, flags) {
+          return this.generateAssignment(expr.left, expr.right, '=', precedence, flags);
+        },
+        ObjectPattern: function (expr, precedence, flags) {
+          var result, i, iz, multiline, property, that = this;
+          if (!expr.properties.length) {
+            return '{}';
+          }
+          multiline = false;
+          if (expr.properties.length === 1) {
+            property = expr.properties[0];
+            if (property.value.type !== Syntax.Identifier) {
+              multiline = true;
+            }
+          } else {
+            for (i = 0, iz = expr.properties.length; i < iz; ++i) {
+              property = expr.properties[i];
+              if (!property.shorthand) {
+                multiline = true;
+                break;
+              }
+            }
+          }
+          result = [
+            '{',
+            multiline ? newline : ''
+          ];
+          withIndent(function (indent) {
+            var i, iz;
+            for (i = 0, iz = expr.properties.length; i < iz; ++i) {
+              result.push(multiline ? indent : '');
+              result.push(that.generateExpression(expr.properties[i], Precedence.Sequence, E_TTT));
+              if (i + 1 < iz) {
+                result.push(',' + (multiline ? newline : space));
+              }
+            }
+          });
+          if (multiline && !endsWithLineTerminator(toSourceNodeWhenNeeded(result).toString())) {
+            result.push(newline);
+          }
+          result.push(multiline ? base : '');
+          result.push('}');
+          return result;
+        },
+        ThisExpression: function (expr, precedence, flags) {
+          return 'this';
+        },
+        Super: function (expr, precedence, flags) {
+          return 'super';
+        },
+        Identifier: function (expr, precedence, flags) {
+          return generateIdentifier(expr);
+        },
+        ImportDefaultSpecifier: function (expr, precedence, flags) {
+          return generateIdentifier(expr.id || expr.local);
+        },
+        ImportNamespaceSpecifier: function (expr, precedence, flags) {
+          var result = ['*'];
+          var id = expr.id || expr.local;
+          if (id) {
+            result.push(space + 'as' + noEmptySpace() + generateIdentifier(id));
+          }
+          return result;
+        },
+        ImportSpecifier: function (expr, precedence, flags) {
+          var imported = expr.imported;
+          var result = [imported.name];
+          var local = expr.local;
+          if (local && local.name !== imported.name) {
+            result.push(noEmptySpace() + 'as' + noEmptySpace() + generateIdentifier(local));
+          }
+          return result;
+        },
+        ExportSpecifier: function (expr, precedence, flags) {
+          var local = expr.local;
+          var result = [local.name];
+          var exported = expr.exported;
+          if (exported && exported.name !== local.name) {
+            result.push(noEmptySpace() + 'as' + noEmptySpace() + generateIdentifier(exported));
+          }
+          return result;
+        },
+        Literal: function (expr, precedence, flags) {
+          var raw;
+          if (expr.hasOwnProperty('raw') && parse && extra.raw) {
+            try {
+              raw = parse(expr.raw).body[0].expression;
+              if (raw.type === Syntax.Literal) {
+                if (raw.value === expr.value) {
+                  return expr.raw;
+                }
+              }
+            } catch (e) {
+            }
+          }
+          if (expr.value === null) {
+            return 'null';
+          }
+          if (typeof expr.value === 'string') {
+            return escapeString(expr.value);
+          }
+          if (typeof expr.value === 'number') {
+            return generateNumber(expr.value);
+          }
+          if (typeof expr.value === 'boolean') {
+            return expr.value ? 'true' : 'false';
+          }
+          if (expr.regex) {
+            return '/' + expr.regex.pattern + '/' + expr.regex.flags;
+          }
+          return generateRegExp(expr.value);
+        },
+        GeneratorExpression: function (expr, precedence, flags) {
+          return this.ComprehensionExpression(expr, precedence, flags);
+        },
+        ComprehensionExpression: function (expr, precedence, flags) {
+          var result, i, iz, fragment, that = this;
+          result = expr.type === Syntax.GeneratorExpression ? ['('] : ['['];
+          if (extra.moz.comprehensionExpressionStartsWithAssignment) {
+            fragment = this.generateExpression(expr.body, Precedence.Assignment, E_TTT);
+            result.push(fragment);
+          }
+          if (expr.blocks) {
+            withIndent(function () {
+              for (i = 0, iz = expr.blocks.length; i < iz; ++i) {
+                fragment = that.generateExpression(expr.blocks[i], Precedence.Sequence, E_TTT);
+                if (i > 0 || extra.moz.comprehensionExpressionStartsWithAssignment) {
+                  result = join(result, fragment);
+                } else {
+                  result.push(fragment);
+                }
+              }
+            });
+          }
+          if (expr.filter) {
+            result = join(result, 'if' + space);
+            fragment = this.generateExpression(expr.filter, Precedence.Sequence, E_TTT);
+            result = join(result, [
+              '(',
+              fragment,
+              ')'
+            ]);
+          }
+          if (!extra.moz.comprehensionExpressionStartsWithAssignment) {
+            fragment = this.generateExpression(expr.body, Precedence.Assignment, E_TTT);
+            result = join(result, fragment);
+          }
+          result.push(expr.type === Syntax.GeneratorExpression ? ')' : ']');
+          return result;
+        },
+        ComprehensionBlock: function (expr, precedence, flags) {
+          var fragment;
+          if (expr.left.type === Syntax.VariableDeclaration) {
+            fragment = [
+              expr.left.kind,
+              noEmptySpace(),
+              this.generateStatement(expr.left.declarations[0], S_FFFF)
+            ];
+          } else {
+            fragment = this.generateExpression(expr.left, Precedence.Call, E_TTT);
+          }
+          fragment = join(fragment, expr.of ? 'of' : 'in');
+          fragment = join(fragment, this.generateExpression(expr.right, Precedence.Sequence, E_TTT));
+          return [
+            'for' + space + '(',
+            fragment,
+            ')'
+          ];
+        },
+        SpreadElement: function (expr, precedence, flags) {
+          return [
+            '...',
+            this.generateExpression(expr.argument, Precedence.Assignment, E_TTT)
+          ];
+        },
+        TaggedTemplateExpression: function (expr, precedence, flags) {
+          var itemFlags = E_TTF;
+          if (!(flags & F_ALLOW_CALL)) {
+            itemFlags = E_TFF;
+          }
+          var result = [
+              this.generateExpression(expr.tag, Precedence.Call, itemFlags),
+              this.generateExpression(expr.quasi, Precedence.Primary, E_FFT)
+            ];
+          return parenthesize(result, Precedence.TaggedTemplate, precedence);
+        },
+        TemplateElement: function (expr, precedence, flags) {
+          return expr.value.raw;
+        },
+        TemplateLiteral: function (expr, precedence, flags) {
+          var result, i, iz;
+          result = ['`'];
+          for (i = 0, iz = expr.quasis.length; i < iz; ++i) {
+            result.push(this.generateExpression(expr.quasis[i], Precedence.Primary, E_TTT));
+            if (i + 1 < iz) {
+              result.push('${' + space);
+              result.push(this.generateExpression(expr.expressions[i], Precedence.Sequence, E_TTT));
+              result.push(space + '}');
+            }
+          }
+          result.push('`');
+          return result;
+        },
+        ModuleSpecifier: function (expr, precedence, flags) {
+          return this.Literal(expr, precedence, flags);
+        }
+      };
+      merge(CodeGenerator.prototype, CodeGenerator.Expression);
+      CodeGenerator.prototype.generateExpression = function (expr, precedence, flags) {
+        var result, type;
+        type = expr.type || Syntax.Property;
+        if (extra.verbatim && expr.hasOwnProperty(extra.verbatim)) {
+          return generateVerbatim(expr, precedence);
+        }
+        result = this[type](expr, precedence, flags);
+        if (extra.comment) {
+          result = addComments(expr, result);
+        }
+        return toSourceNodeWhenNeeded(result, expr);
+      };
+      CodeGenerator.prototype.generateStatement = function (stmt, flags) {
+        var result, fragment;
+        result = this[stmt.type](stmt, flags);
+        if (extra.comment) {
+          result = addComments(stmt, result);
+        }
+        fragment = toSourceNodeWhenNeeded(result).toString();
+        if (stmt.type === Syntax.Program && !safeConcatenation && newline === '' && fragment.charAt(fragment.length - 1) === '\n') {
+          result = sourceMap ? toSourceNodeWhenNeeded(result).replaceRight(/\s+$/, '') : fragment.replace(/\s+$/, '');
+        }
+        return toSourceNodeWhenNeeded(result, stmt);
+      };
+      function generateInternal(node) {
+        var codegen;
+        codegen = new CodeGenerator;
+        if (isStatement(node)) {
+          return codegen.generateStatement(node, S_TFFF);
+        }
+        if (isExpression(node)) {
+          return codegen.generateExpression(node, Precedence.Sequence, E_TTT);
+        }
+        throw new Error('Unknown node type: ' + node.type);
+      }
+      function generate(node, options) {
+        var defaultOptions = getDefaultOptions(), result, pair;
+        if (options != null) {
+          if (typeof options.indent === 'string') {
+            defaultOptions.format.indent.style = options.indent;
+          }
+          if (typeof options.base === 'number') {
+            defaultOptions.format.indent.base = options.base;
+          }
+          options = updateDeeply(defaultOptions, options);
+          indent = options.format.indent.style;
+          if (typeof options.base === 'string') {
+            base = options.base;
+          } else {
+            base = stringRepeat(indent, options.format.indent.base);
+          }
+        } else {
+          options = defaultOptions;
+          indent = options.format.indent.style;
+          base = stringRepeat(indent, options.format.indent.base);
+        }
+        json = options.format.json;
+        renumber = options.format.renumber;
+        hexadecimal = json ? false : options.format.hexadecimal;
+        quotes = json ? 'double' : options.format.quotes;
+        escapeless = options.format.escapeless;
+        newline = options.format.newline;
+        space = options.format.space;
+        if (options.format.compact) {
+          newline = space = indent = base = '';
+        }
+        parentheses = options.format.parentheses;
+        semicolons = options.format.semicolons;
+        safeConcatenation = options.format.safeConcatenation;
+        directive = options.directive;
+        parse = json ? null : options.parse;
+        sourceMap = options.sourceMap;
+        sourceCode = options.sourceCode;
+        preserveBlankLines = options.format.preserveBlankLines && sourceCode !== null;
+        extra = options;
+        if (sourceMap) {
+          if (!exports.browser) {
+            SourceNode = require('/node_modules/source-map/lib/source-map.js', module).SourceNode;
+          } else {
+            SourceNode = global.sourceMap.SourceNode;
+          }
+        }
+        result = generateInternal(node);
+        if (!sourceMap) {
+          pair = {
+            code: result.toString(),
+            map: null
+          };
+          return options.sourceMapWithCode ? pair : pair.code;
+        }
+        pair = result.toStringWithSourceMap({
+          file: options.file,
+          sourceRoot: options.sourceMapRoot
+        });
+        if (options.sourceContent) {
+          pair.map.setSourceContent(options.sourceMap, options.sourceContent);
+        }
+        if (options.sourceMapWithCode) {
+          return pair;
+        }
+        return pair.map.toString();
+      }
+      FORMAT_MINIFY = {
+        indent: {
+          style: '',
+          base: 0
+        },
+        renumber: true,
+        hexadecimal: true,
+        quotes: 'auto',
+        escapeless: true,
+        compact: true,
+        parentheses: false,
+        semicolons: false
+      };
+      FORMAT_DEFAULTS = getDefaultOptions().format;
+      exports.version = require('/package.json', module).version;
+      exports.generate = generate;
+      exports.attachComments = estraverse.attachComments;
+      exports.Precedence = updateDeeply({}, Precedence);
+      exports.browser = false;
+      exports.FORMAT_MINIFY = FORMAT_MINIFY;
+      exports.FORMAT_DEFAULTS = FORMAT_DEFAULTS;
+    }());
+  });
+  require.define('/package.json', function (module, exports, __dirname, __filename) {
+    module.exports = {
+      'name': 'escodegen',
+      'description': 'ECMAScript code generator',
+      'homepage': 'http://github.com/estools/escodegen',
+      'main': 'escodegen.js',
+      'bin': {
+        'esgenerate': './bin/esgenerate.js',
+        'escodegen': './bin/escodegen.js'
+      },
+      'files': [
+        'LICENSE.BSD',
+        'LICENSE.source-map',
+        'README.md',
+        'bin',
+        'escodegen.js',
+        'package.json'
+      ],
+      'version': '1.8.1',
+      'engines': { 'node': '>=0.12.0' },
+      'maintainers': [{
+          'name': 'Yusuke Suzuki',
+          'email': 'utatane.tea@gmail.com',
+          'web': 'http://github.com/Constellation'
+        }],
+      'repository': {
+        'type': 'git',
+        'url': 'http://github.com/estools/escodegen.git'
+      },
+      'dependencies': {
+        'estraverse': '^1.9.1',
+        'esutils': '^2.0.2',
+        'esprima': '^2.7.1',
+        'optionator': '^0.8.1'
+      },
+      'optionalDependencies': { 'source-map': '~0.2.0' },
+      'devDependencies': {
+        'acorn': '^2.7.0',
+        'bluebird': '^2.3.11',
+        'bower-registry-client': '^0.2.1',
+        'chai': '^1.10.0',
+        'commonjs-everywhere': '^0.9.7',
+        'gulp': '^3.8.10',
+        'gulp-eslint': '^0.2.0',
+        'gulp-mocha': '^2.0.0',
+        'semver': '^5.1.0'
+      },
+      'license': 'BSD-2-Clause',
+      'scripts': {
+        'test': 'gulp travis',
+        'unit-test': 'gulp test',
+        'lint': 'gulp lint',
+        'release': 'node tools/release.js',
+        'build-min': './node_modules/.bin/cjsify -ma path: tools/entry-point.js > escodegen.browser.min.js',
+        'build': './node_modules/.bin/cjsify -a path: tools/entry-point.js > escodegen.browser.js'
+      }
+    };
+  });
+  require.define('/node_modules/source-map/lib/source-map.js', function (module, exports, __dirname, __filename) {
+    exports.SourceMapGenerator = require('/node_modules/source-map/lib/source-map/source-map-generator.js', module).SourceMapGenerator;
+    exports.SourceMapConsumer = require('/node_modules/source-map/lib/source-map/source-map-consumer.js', module).SourceMapConsumer;
+    exports.SourceNode = require('/node_modules/source-map/lib/source-map/source-node.js', module).SourceNode;
+  });
+  require.define('/node_modules/source-map/lib/source-map/source-node.js', function (module, exports, __dirname, __filename) {
+    if (typeof define !== 'function') {
+      var define = require('/node_modules/amdefine/amdefine.js', module)(module, require);
+    }
+    define(function (require, exports, module) {
+      var SourceMapGenerator = require('/node_modules/source-map/lib/source-map/source-map-generator.js', module).SourceMapGenerator;
+      var util = require('/node_modules/source-map/lib/source-map/util.js', module);
+      var REGEX_NEWLINE = /(\r?\n)/;
+      var NEWLINE_CODE = 10;
+      var isSourceNode = '$$$isSourceNode$$$';
+      function SourceNode(aLine, aColumn, aSource, aChunks, aName) {
+        this.children = [];
+        this.sourceContents = {};
+        this.line = aLine == null ? null : aLine;
+        this.column = aColumn == null ? null : aColumn;
+        this.source = aSource == null ? null : aSource;
+        this.name = aName == null ? null : aName;
+        this[isSourceNode] = true;
+        if (aChunks != null)
+          this.add(aChunks);
+      }
+      SourceNode.fromStringWithSourceMap = function SourceNode_fromStringWithSourceMap(aGeneratedCode, aSourceMapConsumer, aRelativePath) {
+        var node = new SourceNode;
+        var remainingLines = aGeneratedCode.split(REGEX_NEWLINE);
+        var shiftNextLine = function () {
+          var lineContents = remainingLines.shift();
+          var newLine = remainingLines.shift() || '';
+          return lineContents + newLine;
+        };
+        var lastGeneratedLine = 1, lastGeneratedColumn = 0;
+        var lastMapping = null;
+        aSourceMapConsumer.eachMapping(function (mapping) {
+          if (lastMapping !== null) {
+            if (lastGeneratedLine < mapping.generatedLine) {
+              var code = '';
+              addMappingWithCode(lastMapping, shiftNextLine());
+              lastGeneratedLine++;
+              lastGeneratedColumn = 0;
+            } else {
+              var nextLine = remainingLines[0];
+              var code = nextLine.substr(0, mapping.generatedColumn - lastGeneratedColumn);
+              remainingLines[0] = nextLine.substr(mapping.generatedColumn - lastGeneratedColumn);
+              lastGeneratedColumn = mapping.generatedColumn;
+              addMappingWithCode(lastMapping, code);
+              lastMapping = mapping;
+              return;
+            }
+          }
+          while (lastGeneratedLine < mapping.generatedLine) {
+            node.add(shiftNextLine());
+            lastGeneratedLine++;
+          }
+          if (lastGeneratedColumn < mapping.generatedColumn) {
+            var nextLine = remainingLines[0];
+            node.add(nextLine.substr(0, mapping.generatedColumn));
+            remainingLines[0] = nextLine.substr(mapping.generatedColumn);
+            lastGeneratedColumn = mapping.generatedColumn;
+          }
+          lastMapping = mapping;
+        }, this);
+        if (remainingLines.length > 0) {
+          if (lastMapping) {
+            addMappingWithCode(lastMapping, shiftNextLine());
+          }
+          node.add(remainingLines.join(''));
+        }
+        aSourceMapConsumer.sources.forEach(function (sourceFile) {
+          var content = aSourceMapConsumer.sourceContentFor(sourceFile);
+          if (content != null) {
+            if (aRelativePath != null) {
+              sourceFile = util.join(aRelativePath, sourceFile);
+            }
+            node.setSourceContent(sourceFile, content);
+          }
+        });
+        return node;
+        function addMappingWithCode(mapping, code) {
+          if (mapping === null || mapping.source === undefined) {
+            node.add(code);
+          } else {
+            var source = aRelativePath ? util.join(aRelativePath, mapping.source) : mapping.source;
+            node.add(new SourceNode(mapping.originalLine, mapping.originalColumn, source, code, mapping.name));
+          }
+        }
+      };
+      SourceNode.prototype.add = function SourceNode_add(aChunk) {
+        if (Array.isArray(aChunk)) {
+          aChunk.forEach(function (chunk) {
+            this.add(chunk);
+          }, this);
+        } else if (aChunk[isSourceNode] || typeof aChunk === 'string') {
+          if (aChunk) {
+            this.children.push(aChunk);
+          }
+        } else {
+          throw new TypeError('Expected a SourceNode, string, or an array of SourceNodes and strings. Got ' + aChunk);
+        }
+        return this;
+      };
+      SourceNode.prototype.prepend = function SourceNode_prepend(aChunk) {
+        if (Array.isArray(aChunk)) {
+          for (var i = aChunk.length - 1; i >= 0; i--) {
+            this.prepend(aChunk[i]);
+          }
+        } else if (aChunk[isSourceNode] || typeof aChunk === 'string') {
+          this.children.unshift(aChunk);
+        } else {
+          throw new TypeError('Expected a SourceNode, string, or an array of SourceNodes and strings. Got ' + aChunk);
+        }
+        return this;
+      };
+      SourceNode.prototype.walk = function SourceNode_walk(aFn) {
+        var chunk;
+        for (var i = 0, len = this.children.length; i < len; i++) {
+          chunk = this.children[i];
+          if (chunk[isSourceNode]) {
+            chunk.walk(aFn);
+          } else {
+            if (chunk !== '') {
+              aFn(chunk, {
+                source: this.source,
+                line: this.line,
+                column: this.column,
+                name: this.name
+              });
+            }
+          }
+        }
+      };
+      SourceNode.prototype.join = function SourceNode_join(aSep) {
+        var newChildren;
+        var i;
+        var len = this.children.length;
+        if (len > 0) {
+          newChildren = [];
+          for (i = 0; i < len - 1; i++) {
+            newChildren.push(this.children[i]);
+            newChildren.push(aSep);
+          }
+          newChildren.push(this.children[i]);
+          this.children = newChildren;
+        }
+        return this;
+      };
+      SourceNode.prototype.replaceRight = function SourceNode_replaceRight(aPattern, aReplacement) {
+        var lastChild = this.children[this.children.length - 1];
+        if (lastChild[isSourceNode]) {
+          lastChild.replaceRight(aPattern, aReplacement);
+        } else if (typeof lastChild === 'string') {
+          this.children[this.children.length - 1] = lastChild.replace(aPattern, aReplacement);
+        } else {
+          this.children.push(''.replace(aPattern, aReplacement));
+        }
+        return this;
+      };
+      SourceNode.prototype.setSourceContent = function SourceNode_setSourceContent(aSourceFile, aSourceContent) {
+        this.sourceContents[util.toSetString(aSourceFile)] = aSourceContent;
+      };
+      SourceNode.prototype.walkSourceContents = function SourceNode_walkSourceContents(aFn) {
+        for (var i = 0, len = this.children.length; i < len; i++) {
+          if (this.children[i][isSourceNode]) {
+            this.children[i].walkSourceContents(aFn);
+          }
+        }
+        var sources = Object.keys(this.sourceContents);
+        for (var i = 0, len = sources.length; i < len; i++) {
+          aFn(util.fromSetString(sources[i]), this.sourceContents[sources[i]]);
+        }
+      };
+      SourceNode.prototype.toString = function SourceNode_toString() {
+        var str = '';
+        this.walk(function (chunk) {
+          str += chunk;
+        });
+        return str;
+      };
+      SourceNode.prototype.toStringWithSourceMap = function SourceNode_toStringWithSourceMap(aArgs) {
+        var generated = {
+            code: '',
+            line: 1,
+            column: 0
+          };
+        var map = new SourceMapGenerator(aArgs);
+        var sourceMappingActive = false;
+        var lastOriginalSource = null;
+        var lastOriginalLine = null;
+        var lastOriginalColumn = null;
+        var lastOriginalName = null;
+        this.walk(function (chunk, original) {
+          generated.code += chunk;
+          if (original.source !== null && original.line !== null && original.column !== null) {
+            if (lastOriginalSource !== original.source || lastOriginalLine !== original.line || lastOriginalColumn !== original.column || lastOriginalName !== original.name) {
+              map.addMapping({
+                source: original.source,
+                original: {
+                  line: original.line,
+                  column: original.column
+                },
+                generated: {
+                  line: generated.line,
+                  column: generated.column
+                },
+                name: original.name
+              });
+            }
+            lastOriginalSource = original.source;
+            lastOriginalLine = original.line;
+            lastOriginalColumn = original.column;
+            lastOriginalName = original.name;
+            sourceMappingActive = true;
+          } else if (sourceMappingActive) {
+            map.addMapping({
+              generated: {
+                line: generated.line,
+                column: generated.column
+              }
+            });
+            lastOriginalSource = null;
+            sourceMappingActive = false;
+          }
+          for (var idx = 0, length = chunk.length; idx < length; idx++) {
+            if (chunk.charCodeAt(idx) === NEWLINE_CODE) {
+              generated.line++;
+              generated.column = 0;
+              if (idx + 1 === length) {
+                lastOriginalSource = null;
+                sourceMappingActive = false;
+              } else if (sourceMappingActive) {
+                map.addMapping({
+                  source: original.source,
+                  original: {
+                    line: original.line,
+                    column: original.column
+                  },
+                  generated: {
+                    line: generated.line,
+                    column: generated.column
+                  },
+                  name: original.name
+                });
+              }
+            } else {
+              generated.column++;
+            }
+          }
+        });
+        this.walkSourceContents(function (sourceFile, sourceContent) {
+          map.setSourceContent(sourceFile, sourceContent);
+        });
+        return {
+          code: generated.code,
+          map: map
+        };
+      };
+      exports.SourceNode = SourceNode;
+    });
+  });
+  require.define('/node_modules/source-map/lib/source-map/util.js', function (module, exports, __dirname, __filename) {
+    if (typeof define !== 'function') {
+      var define = require('/node_modules/amdefine/amdefine.js', module)(module, require);
+    }
+    define(function (require, exports, module) {
+      function getArg(aArgs, aName, aDefaultValue) {
+        if (aName in aArgs) {
+          return aArgs[aName];
+        } else if (arguments.length === 3) {
+          return aDefaultValue;
+        } else {
+          throw new Error('"' + aName + '" is a required argument.');
+        }
+      }
+      exports.getArg = getArg;
+      var urlRegexp = /^(?:([\w+\-.]+):)?\/\/(?:(\w+:\w+)@)?([\w.]*)(?::(\d+))?(\S*)$/;
+      var dataUrlRegexp = /^data:.+\,.+$/;
+      function urlParse(aUrl) {
+        var match = aUrl.match(urlRegexp);
+        if (!match) {
+          return null;
+        }
+        return {
+          scheme: match[1],
+          auth: match[2],
+          host: match[3],
+          port: match[4],
+          path: match[5]
+        };
+      }
+      exports.urlParse = urlParse;
+      function urlGenerate(aParsedUrl) {
+        var url = '';
+        if (aParsedUrl.scheme) {
+          url += aParsedUrl.scheme + ':';
+        }
+        url += '//';
+        if (aParsedUrl.auth) {
+          url += aParsedUrl.auth + '@';
+        }
+        if (aParsedUrl.host) {
+          url += aParsedUrl.host;
+        }
+        if (aParsedUrl.port) {
+          url += ':' + aParsedUrl.port;
+        }
+        if (aParsedUrl.path) {
+          url += aParsedUrl.path;
+        }
+        return url;
+      }
+      exports.urlGenerate = urlGenerate;
+      function normalize(aPath) {
+        var path = aPath;
+        var url = urlParse(aPath);
+        if (url) {
+          if (!url.path) {
+            return aPath;
+          }
+          path = url.path;
+        }
+        var isAbsolute = path.charAt(0) === '/';
+        var parts = path.split(/\/+/);
+        for (var part, up = 0, i = parts.length - 1; i >= 0; i--) {
+          part = parts[i];
+          if (part === '.') {
+            parts.splice(i, 1);
+          } else if (part === '..') {
+            up++;
+          } else if (up > 0) {
+            if (part === '') {
+              parts.splice(i + 1, up);
+              up = 0;
+            } else {
+              parts.splice(i, 2);
+              up--;
+            }
+          }
+        }
+        path = parts.join('/');
+        if (path === '') {
+          path = isAbsolute ? '/' : '.';
+        }
+        if (url) {
+          url.path = path;
+          return urlGenerate(url);
+        }
+        return path;
+      }
+      exports.normalize = normalize;
+      function join(aRoot, aPath) {
+        if (aRoot === '') {
+          aRoot = '.';
+        }
+        if (aPath === '') {
+          aPath = '.';
+        }
+        var aPathUrl = urlParse(aPath);
+        var aRootUrl = urlParse(aRoot);
+        if (aRootUrl) {
+          aRoot = aRootUrl.path || '/';
+        }
+        if (aPathUrl && !aPathUrl.scheme) {
+          if (aRootUrl) {
+            aPathUrl.scheme = aRootUrl.scheme;
+          }
+          return urlGenerate(aPathUrl);
+        }
+        if (aPathUrl || aPath.match(dataUrlRegexp)) {
+          return aPath;
+        }
+        if (aRootUrl && !aRootUrl.host && !aRootUrl.path) {
+          aRootUrl.host = aPath;
+          return urlGenerate(aRootUrl);
+        }
+        var joined = aPath.charAt(0) === '/' ? aPath : normalize(aRoot.replace(/\/+$/, '') + '/' + aPath);
+        if (aRootUrl) {
+          aRootUrl.path = joined;
+          return urlGenerate(aRootUrl);
+        }
+        return joined;
+      }
+      exports.join = join;
+      function relative(aRoot, aPath) {
+        if (aRoot === '') {
+          aRoot = '.';
+        }
+        aRoot = aRoot.replace(/\/$/, '');
+        var url = urlParse(aRoot);
+        if (aPath.charAt(0) == '/' && url && url.path == '/') {
+          return aPath.slice(1);
+        }
+        return aPath.indexOf(aRoot + '/') === 0 ? aPath.substr(aRoot.length + 1) : aPath;
+      }
+      exports.relative = relative;
+      function toSetString(aStr) {
+        return '$' + aStr;
+      }
+      exports.toSetString = toSetString;
+      function fromSetString(aStr) {
+        return aStr.substr(1);
+      }
+      exports.fromSetString = fromSetString;
+      function strcmp(aStr1, aStr2) {
+        var s1 = aStr1 || '';
+        var s2 = aStr2 || '';
+        return (s1 > s2) - (s1 < s2);
+      }
+      function compareByOriginalPositions(mappingA, mappingB, onlyCompareOriginal) {
+        var cmp;
+        cmp = strcmp(mappingA.source, mappingB.source);
+        if (cmp) {
+          return cmp;
+        }
+        cmp = mappingA.originalLine - mappingB.originalLine;
+        if (cmp) {
+          return cmp;
+        }
+        cmp = mappingA.originalColumn - mappingB.originalColumn;
+        if (cmp || onlyCompareOriginal) {
+          return cmp;
+        }
+        cmp = strcmp(mappingA.name, mappingB.name);
+        if (cmp) {
+          return cmp;
+        }
+        cmp = mappingA.generatedLine - mappingB.generatedLine;
+        if (cmp) {
+          return cmp;
+        }
+        return mappingA.generatedColumn - mappingB.generatedColumn;
+      }
+      ;
+      exports.compareByOriginalPositions = compareByOriginalPositions;
+      function compareByGeneratedPositions(mappingA, mappingB, onlyCompareGenerated) {
+        var cmp;
+        cmp = mappingA.generatedLine - mappingB.generatedLine;
+        if (cmp) {
+          return cmp;
+        }
+        cmp = mappingA.generatedColumn - mappingB.generatedColumn;
+        if (cmp || onlyCompareGenerated) {
+          return cmp;
+        }
+        cmp = strcmp(mappingA.source, mappingB.source);
+        if (cmp) {
+          return cmp;
+        }
+        cmp = mappingA.originalLine - mappingB.originalLine;
+        if (cmp) {
+          return cmp;
+        }
+        cmp = mappingA.originalColumn - mappingB.originalColumn;
+        if (cmp) {
+          return cmp;
+        }
+        return strcmp(mappingA.name, mappingB.name);
+      }
+      ;
+      exports.compareByGeneratedPositions = compareByGeneratedPositions;
+    });
+  });
+  require.define('/node_modules/amdefine/amdefine.js', function (module, exports, __dirname, __filename) {
+    'use strict';
+    function amdefine(module, requireFn) {
+      'use strict';
+      var defineCache = {}, loaderCache = {}, alreadyCalled = false, path = require('path', module), makeRequire, stringRequire;
+      function trimDots(ary) {
+        var i, part;
+        for (i = 0; ary[i]; i += 1) {
+          part = ary[i];
+          if (part === '.') {
+            ary.splice(i, 1);
+            i -= 1;
+          } else if (part === '..') {
+            if (i === 1 && (ary[2] === '..' || ary[0] === '..')) {
+              break;
+            } else if (i > 0) {
+              ary.splice(i - 1, 2);
+              i -= 2;
+            }
+          }
+        }
+      }
+      function normalize(name, baseName) {
+        var baseParts;
+        if (name && name.charAt(0) === '.') {
+          if (baseName) {
+            baseParts = baseName.split('/');
+            baseParts = baseParts.slice(0, baseParts.length - 1);
+            baseParts = baseParts.concat(name.split('/'));
+            trimDots(baseParts);
+            name = baseParts.join('/');
+          }
+        }
+        return name;
+      }
+      function makeNormalize(relName) {
+        return function (name) {
+          return normalize(name, relName);
+        };
+      }
+      function makeLoad(id) {
+        function load(value) {
+          loaderCache[id] = value;
+        }
+        load.fromText = function (id, text) {
+          throw new Error('amdefine does not implement load.fromText');
+        };
+        return load;
+      }
+      makeRequire = function (systemRequire, exports, module, relId) {
+        function amdRequire(deps, callback) {
+          if (typeof deps === 'string') {
+            return stringRequire(systemRequire, exports, module, deps, relId);
+          } else {
+            deps = deps.map(function (depName) {
+              return stringRequire(systemRequire, exports, module, depName, relId);
+            });
+            if (callback) {
+              process.nextTick(function () {
+                callback.apply(null, deps);
+              });
+            }
+          }
+        }
+        amdRequire.toUrl = function (filePath) {
+          if (filePath.indexOf('.') === 0) {
+            return normalize(filePath, path.dirname(module.filename));
+          } else {
+            return filePath;
+          }
+        };
+        return amdRequire;
+      };
+      requireFn = requireFn || function req() {
+        return module.require.apply(module, arguments);
+      };
+      function runFactory(id, deps, factory) {
+        var r, e, m, result;
+        if (id) {
+          e = loaderCache[id] = {};
+          m = {
+            id: id,
+            uri: __filename,
+            exports: e
+          };
+          r = makeRequire(requireFn, e, m, id);
+        } else {
+          if (alreadyCalled) {
+            throw new Error('amdefine with no module ID cannot be called more than once per file.');
+          }
+          alreadyCalled = true;
+          e = module.exports;
+          m = module;
+          r = makeRequire(requireFn, e, m, module.id);
+        }
+        if (deps) {
+          deps = deps.map(function (depName) {
+            return r(depName);
+          });
+        }
+        if (typeof factory === 'function') {
+          result = factory.apply(m.exports, deps);
+        } else {
+          result = factory;
+        }
+        if (result !== undefined) {
+          m.exports = result;
+          if (id) {
+            loaderCache[id] = m.exports;
+          }
+        }
+      }
+      stringRequire = function (systemRequire, exports, module, id, relId) {
+        var index = id.indexOf('!'), originalId = id, prefix, plugin;
+        if (index === -1) {
+          id = normalize(id, relId);
+          if (id === 'require') {
+            return makeRequire(systemRequire, exports, module, relId);
+          } else if (id === 'exports') {
+            return exports;
+          } else if (id === 'module') {
+            return module;
+          } else if (loaderCache.hasOwnProperty(id)) {
+            return loaderCache[id];
+          } else if (defineCache[id]) {
+            runFactory.apply(null, defineCache[id]);
+            return loaderCache[id];
+          } else {
+            if (systemRequire) {
+              return systemRequire(originalId);
+            } else {
+              throw new Error('No module with ID: ' + id);
+            }
+          }
+        } else {
+          prefix = id.substring(0, index);
+          id = id.substring(index + 1, id.length);
+          plugin = stringRequire(systemRequire, exports, module, prefix, relId);
+          if (plugin.normalize) {
+            id = plugin.normalize(id, makeNormalize(relId));
+          } else {
+            id = normalize(id, relId);
+          }
+          if (loaderCache[id]) {
+            return loaderCache[id];
+          } else {
+            plugin.load(id, makeRequire(systemRequire, exports, module, relId), makeLoad(id), {});
+            return loaderCache[id];
+          }
+        }
+      };
+      function define(id, deps, factory) {
+        if (Array.isArray(id)) {
+          factory = deps;
+          deps = id;
+          id = undefined;
+        } else if (typeof id !== 'string') {
+          factory = id;
+          id = deps = undefined;
+        }
+        if (deps && !Array.isArray(deps)) {
+          factory = deps;
+          deps = undefined;
+        }
+        if (!deps) {
+          deps = [
+            'require',
+            'exports',
+            'module'
+          ];
+        }
+        if (id) {
+          defineCache[id] = [
+            id,
+            deps,
+            factory
+          ];
+        } else {
+          runFactory(id, deps, factory);
+        }
+      }
+      define.require = function (id) {
+        if (loaderCache[id]) {
+          return loaderCache[id];
+        }
+        if (defineCache[id]) {
+          runFactory.apply(null, defineCache[id]);
+          return loaderCache[id];
+        }
+      };
+      define.amd = {};
+      return define;
+    }
+    module.exports = amdefine;
+  });
+  require.define('/node_modules/source-map/lib/source-map/source-map-generator.js', function (module, exports, __dirname, __filename) {
+    if (typeof define !== 'function') {
+      var define = require('/node_modules/amdefine/amdefine.js', module)(module, require);
+    }
+    define(function (require, exports, module) {
+      var base64VLQ = require('/node_modules/source-map/lib/source-map/base64-vlq.js', module);
+      var util = require('/node_modules/source-map/lib/source-map/util.js', module);
+      var ArraySet = require('/node_modules/source-map/lib/source-map/array-set.js', module).ArraySet;
+      var MappingList = require('/node_modules/source-map/lib/source-map/mapping-list.js', module).MappingList;
+      function SourceMapGenerator(aArgs) {
+        if (!aArgs) {
+          aArgs = {};
+        }
+        this._file = util.getArg(aArgs, 'file', null);
+        this._sourceRoot = util.getArg(aArgs, 'sourceRoot', null);
+        this._skipValidation = util.getArg(aArgs, 'skipValidation', false);
+        this._sources = new ArraySet;
+        this._names = new ArraySet;
+        this._mappings = new MappingList;
+        this._sourcesContents = null;
+      }
+      SourceMapGenerator.prototype._version = 3;
+      SourceMapGenerator.fromSourceMap = function SourceMapGenerator_fromSourceMap(aSourceMapConsumer) {
+        var sourceRoot = aSourceMapConsumer.sourceRoot;
+        var generator = new SourceMapGenerator({
+            file: aSourceMapConsumer.file,
+            sourceRoot: sourceRoot
+          });
+        aSourceMapConsumer.eachMapping(function (mapping) {
+          var newMapping = {
+              generated: {
+                line: mapping.generatedLine,
+                column: mapping.generatedColumn
+              }
+            };
+          if (mapping.source != null) {
+            newMapping.source = mapping.source;
+            if (sourceRoot != null) {
+              newMapping.source = util.relative(sourceRoot, newMapping.source);
+            }
+            newMapping.original = {
+              line: mapping.originalLine,
+              column: mapping.originalColumn
+            };
+            if (mapping.name != null) {
+              newMapping.name = mapping.name;
+            }
+          }
+          generator.addMapping(newMapping);
+        });
+        aSourceMapConsumer.sources.forEach(function (sourceFile) {
+          var content = aSourceMapConsumer.sourceContentFor(sourceFile);
+          if (content != null) {
+            generator.setSourceContent(sourceFile, content);
+          }
+        });
+        return generator;
+      };
+      SourceMapGenerator.prototype.addMapping = function SourceMapGenerator_addMapping(aArgs) {
+        var generated = util.getArg(aArgs, 'generated');
+        var original = util.getArg(aArgs, 'original', null);
+        var source = util.getArg(aArgs, 'source', null);
+        var name = util.getArg(aArgs, 'name', null);
+        if (!this._skipValidation) {
+          this._validateMapping(generated, original, source, name);
+        }
+        if (source != null && !this._sources.has(source)) {
+          this._sources.add(source);
+        }
+        if (name != null && !this._names.has(name)) {
+          this._names.add(name);
+        }
+        this._mappings.add({
+          generatedLine: generated.line,
+          generatedColumn: generated.column,
+          originalLine: original != null && original.line,
+          originalColumn: original != null && original.column,
+          source: source,
+          name: name
+        });
+      };
+      SourceMapGenerator.prototype.setSourceContent = function SourceMapGenerator_setSourceContent(aSourceFile, aSourceContent) {
+        var source = aSourceFile;
+        if (this._sourceRoot != null) {
+          source = util.relative(this._sourceRoot, source);
+        }
+        if (aSourceContent != null) {
+          if (!this._sourcesContents) {
+            this._sourcesContents = {};
+          }
+          this._sourcesContents[util.toSetString(source)] = aSourceContent;
+        } else if (this._sourcesContents) {
+          delete this._sourcesContents[util.toSetString(source)];
+          if (Object.keys(this._sourcesContents).length === 0) {
+            this._sourcesContents = null;
+          }
+        }
+      };
+      SourceMapGenerator.prototype.applySourceMap = function SourceMapGenerator_applySourceMap(aSourceMapConsumer, aSourceFile, aSourceMapPath) {
+        var sourceFile = aSourceFile;
+        if (aSourceFile == null) {
+          if (aSourceMapConsumer.file == null) {
+            throw new Error('SourceMapGenerator.prototype.applySourceMap requires either an explicit source file, ' + 'or the source map\'s "file" property. Both were omitted.');
+          }
+          sourceFile = aSourceMapConsumer.file;
+        }
+        var sourceRoot = this._sourceRoot;
+        if (sourceRoot != null) {
+          sourceFile = util.relative(sourceRoot, sourceFile);
+        }
+        var newSources = new ArraySet;
+        var newNames = new ArraySet;
+        this._mappings.unsortedForEach(function (mapping) {
+          if (mapping.source === sourceFile && mapping.originalLine != null) {
+            var original = aSourceMapConsumer.originalPositionFor({
+                line: mapping.originalLine,
+                column: mapping.originalColumn
+              });
+            if (original.source != null) {
+              mapping.source = original.source;
+              if (aSourceMapPath != null) {
+                mapping.source = util.join(aSourceMapPath, mapping.source);
+              }
+              if (sourceRoot != null) {
+                mapping.source = util.relative(sourceRoot, mapping.source);
+              }
+              mapping.originalLine = original.line;
+              mapping.originalColumn = original.column;
+              if (original.name != null) {
+                mapping.name = original.name;
+              }
+            }
+          }
+          var source = mapping.source;
+          if (source != null && !newSources.has(source)) {
+            newSources.add(source);
+          }
+          var name = mapping.name;
+          if (name != null && !newNames.has(name)) {
+            newNames.add(name);
+          }
+        }, this);
+        this._sources = newSources;
+        this._names = newNames;
+        aSourceMapConsumer.sources.forEach(function (sourceFile) {
+          var content = aSourceMapConsumer.sourceContentFor(sourceFile);
+          if (content != null) {
+            if (aSourceMapPath != null) {
+              sourceFile = util.join(aSourceMapPath, sourceFile);
+            }
+            if (sourceRoot != null) {
+              sourceFile = util.relative(sourceRoot, sourceFile);
+            }
+            this.setSourceContent(sourceFile, content);
+          }
+        }, this);
+      };
+      SourceMapGenerator.prototype._validateMapping = function SourceMapGenerator_validateMapping(aGenerated, aOriginal, aSource, aName) {
+        if (aGenerated && 'line' in aGenerated && 'column' in aGenerated && aGenerated.line > 0 && aGenerated.column >= 0 && !aOriginal && !aSource && !aName) {
+          return;
+        } else if (aGenerated && 'line' in aGenerated && 'column' in aGenerated && aOriginal && 'line' in aOriginal && 'column' in aOriginal && aGenerated.line > 0 && aGenerated.column >= 0 && aOriginal.line > 0 && aOriginal.column >= 0 && aSource) {
+          return;
+        } else {
+          throw new Error('Invalid mapping: ' + JSON.stringify({
+            generated: aGenerated,
+            source: aSource,
+            original: aOriginal,
+            name: aName
+          }));
+        }
+      };
+      SourceMapGenerator.prototype._serializeMappings = function SourceMapGenerator_serializeMappings() {
+        var previousGeneratedColumn = 0;
+        var previousGeneratedLine = 1;
+        var previousOriginalColumn = 0;
+        var previousOriginalLine = 0;
+        var previousName = 0;
+        var previousSource = 0;
+        var result = '';
+        var mapping;
+        var mappings = this._mappings.toArray();
+        for (var i = 0, len = mappings.length; i < len; i++) {
+          mapping = mappings[i];
+          if (mapping.generatedLine !== previousGeneratedLine) {
+            previousGeneratedColumn = 0;
+            while (mapping.generatedLine !== previousGeneratedLine) {
+              result += ';';
+              previousGeneratedLine++;
+            }
+          } else {
+            if (i > 0) {
+              if (!util.compareByGeneratedPositions(mapping, mappings[i - 1])) {
+                continue;
+              }
+              result += ',';
+            }
+          }
+          result += base64VLQ.encode(mapping.generatedColumn - previousGeneratedColumn);
+          previousGeneratedColumn = mapping.generatedColumn;
+          if (mapping.source != null) {
+            result += base64VLQ.encode(this._sources.indexOf(mapping.source) - previousSource);
+            previousSource = this._sources.indexOf(mapping.source);
+            result += base64VLQ.encode(mapping.originalLine - 1 - previousOriginalLine);
+            previousOriginalLine = mapping.originalLine - 1;
+            result += base64VLQ.encode(mapping.originalColumn - previousOriginalColumn);
+            previousOriginalColumn = mapping.originalColumn;
+            if (mapping.name != null) {
+              result += base64VLQ.encode(this._names.indexOf(mapping.name) - previousName);
+              previousName = this._names.indexOf(mapping.name);
+            }
+          }
+        }
+        return result;
+      };
+      SourceMapGenerator.prototype._generateSourcesContent = function SourceMapGenerator_generateSourcesContent(aSources, aSourceRoot) {
+        return aSources.map(function (source) {
+          if (!this._sourcesContents) {
+            return null;
+          }
+          if (aSourceRoot != null) {
+            source = util.relative(aSourceRoot, source);
+          }
+          var key = util.toSetString(source);
+          return Object.prototype.hasOwnProperty.call(this._sourcesContents, key) ? this._sourcesContents[key] : null;
+        }, this);
+      };
+      SourceMapGenerator.prototype.toJSON = function SourceMapGenerator_toJSON() {
+        var map = {
+            version: this._version,
+            sources: this._sources.toArray(),
+            names: this._names.toArray(),
+            mappings: this._serializeMappings()
+          };
+        if (this._file != null) {
+          map.file = this._file;
+        }
+        if (this._sourceRoot != null) {
+          map.sourceRoot = this._sourceRoot;
+        }
+        if (this._sourcesContents) {
+          map.sourcesContent = this._generateSourcesContent(map.sources, map.sourceRoot);
+        }
+        return map;
+      };
+      SourceMapGenerator.prototype.toString = function SourceMapGenerator_toString() {
+        return JSON.stringify(this);
+      };
+      exports.SourceMapGenerator = SourceMapGenerator;
+    });
+  });
+  require.define('/node_modules/source-map/lib/source-map/mapping-list.js', function (module, exports, __dirname, __filename) {
+    if (typeof define !== 'function') {
+      var define = require('/node_modules/amdefine/amdefine.js', module)(module, require);
+    }
+    define(function (require, exports, module) {
+      var util = require('/node_modules/source-map/lib/source-map/util.js', module);
+      function generatedPositionAfter(mappingA, mappingB) {
+        var lineA = mappingA.generatedLine;
+        var lineB = mappingB.generatedLine;
+        var columnA = mappingA.generatedColumn;
+        var columnB = mappingB.generatedColumn;
+        return lineB > lineA || lineB == lineA && columnB >= columnA || util.compareByGeneratedPositions(mappingA, mappingB) <= 0;
+      }
+      function MappingList() {
+        this._array = [];
+        this._sorted = true;
+        this._last = {
+          generatedLine: -1,
+          generatedColumn: 0
+        };
+      }
+      MappingList.prototype.unsortedForEach = function MappingList_forEach(aCallback, aThisArg) {
+        this._array.forEach(aCallback, aThisArg);
+      };
+      MappingList.prototype.add = function MappingList_add(aMapping) {
+        var mapping;
+        if (generatedPositionAfter(this._last, aMapping)) {
+          this._last = aMapping;
+          this._array.push(aMapping);
+        } else {
+          this._sorted = false;
+          this._array.push(aMapping);
+        }
+      };
+      MappingList.prototype.toArray = function MappingList_toArray() {
+        if (!this._sorted) {
+          this._array.sort(util.compareByGeneratedPositions);
+          this._sorted = true;
+        }
+        return this._array;
+      };
+      exports.MappingList = MappingList;
+    });
+  });
+  require.define('/node_modules/source-map/lib/source-map/array-set.js', function (module, exports, __dirname, __filename) {
+    if (typeof define !== 'function') {
+      var define = require('/node_modules/amdefine/amdefine.js', module)(module, require);
+    }
+    define(function (require, exports, module) {
+      var util = require('/node_modules/source-map/lib/source-map/util.js', module);
+      function ArraySet() {
+        this._array = [];
+        this._set = {};
+      }
+      ArraySet.fromArray = function ArraySet_fromArray(aArray, aAllowDuplicates) {
+        var set = new ArraySet;
+        for (var i = 0, len = aArray.length; i < len; i++) {
+          set.add(aArray[i], aAllowDuplicates);
+        }
+        return set;
+      };
+      ArraySet.prototype.add = function ArraySet_add(aStr, aAllowDuplicates) {
+        var isDuplicate = this.has(aStr);
+        var idx = this._array.length;
+        if (!isDuplicate || aAllowDuplicates) {
+          this._array.push(aStr);
+        }
+        if (!isDuplicate) {
+          this._set[util.toSetString(aStr)] = idx;
+        }
+      };
+      ArraySet.prototype.has = function ArraySet_has(aStr) {
+        return Object.prototype.hasOwnProperty.call(this._set, util.toSetString(aStr));
+      };
+      ArraySet.prototype.indexOf = function ArraySet_indexOf(aStr) {
+        if (this.has(aStr)) {
+          return this._set[util.toSetString(aStr)];
+        }
+        throw new Error('"' + aStr + '" is not in the set.');
+      };
+      ArraySet.prototype.at = function ArraySet_at(aIdx) {
+        if (aIdx >= 0 && aIdx < this._array.length) {
+          return this._array[aIdx];
+        }
+        throw new Error('No element indexed by ' + aIdx);
+      };
+      ArraySet.prototype.toArray = function ArraySet_toArray() {
+        return this._array.slice();
+      };
+      exports.ArraySet = ArraySet;
+    });
+  });
+  require.define('/node_modules/source-map/lib/source-map/base64-vlq.js', function (module, exports, __dirname, __filename) {
+    if (typeof define !== 'function') {
+      var define = require('/node_modules/amdefine/amdefine.js', module)(module, require);
+    }
+    define(function (require, exports, module) {
+      var base64 = require('/node_modules/source-map/lib/source-map/base64.js', module);
+      var VLQ_BASE_SHIFT = 5;
+      var VLQ_BASE = 1 << VLQ_BASE_SHIFT;
+      var VLQ_BASE_MASK = VLQ_BASE - 1;
+      var VLQ_CONTINUATION_BIT = VLQ_BASE;
+      function toVLQSigned(aValue) {
+        return aValue < 0 ? (-aValue << 1) + 1 : (aValue << 1) + 0;
+      }
+      function fromVLQSigned(aValue) {
+        var isNegative = (aValue & 1) === 1;
+        var shifted = aValue >> 1;
+        return isNegative ? -shifted : shifted;
+      }
+      exports.encode = function base64VLQ_encode(aValue) {
+        var encoded = '';
+        var digit;
+        var vlq = toVLQSigned(aValue);
+        do {
+          digit = vlq & VLQ_BASE_MASK;
+          vlq >>>= VLQ_BASE_SHIFT;
+          if (vlq > 0) {
+            digit |= VLQ_CONTINUATION_BIT;
+          }
+          encoded += base64.encode(digit);
+        } while (vlq > 0);
+        return encoded;
+      };
+      exports.decode = function base64VLQ_decode(aStr, aOutParam) {
+        var i = 0;
+        var strLen = aStr.length;
+        var result = 0;
+        var shift = 0;
+        var continuation, digit;
+        do {
+          if (i >= strLen) {
+            throw new Error('Expected more digits in base 64 VLQ value.');
+          }
+          digit = base64.decode(aStr.charAt(i++));
+          continuation = !!(digit & VLQ_CONTINUATION_BIT);
+          digit &= VLQ_BASE_MASK;
+          result = result + (digit << shift);
+          shift += VLQ_BASE_SHIFT;
+        } while (continuation);
+        aOutParam.value = fromVLQSigned(result);
+        aOutParam.rest = aStr.slice(i);
+      };
+    });
+  });
+  require.define('/node_modules/source-map/lib/source-map/base64.js', function (module, exports, __dirname, __filename) {
+    if (typeof define !== 'function') {
+      var define = require('/node_modules/amdefine/amdefine.js', module)(module, require);
+    }
+    define(function (require, exports, module) {
+      var charToIntMap = {};
+      var intToCharMap = {};
+      'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/'.split('').forEach(function (ch, index) {
+        charToIntMap[ch] = index;
+        intToCharMap[index] = ch;
+      });
+      exports.encode = function base64_encode(aNumber) {
+        if (aNumber in intToCharMap) {
+          return intToCharMap[aNumber];
+        }
+        throw new TypeError('Must be between 0 and 63: ' + aNumber);
+      };
+      exports.decode = function base64_decode(aChar) {
+        if (aChar in charToIntMap) {
+          return charToIntMap[aChar];
+        }
+        throw new TypeError('Not a valid base 64 digit: ' + aChar);
+      };
+    });
+  });
+  require.define('/node_modules/source-map/lib/source-map/source-map-consumer.js', function (module, exports, __dirname, __filename) {
+    if (typeof define !== 'function') {
+      var define = require('/node_modules/amdefine/amdefine.js', module)(module, require);
+    }
+    define(function (require, exports, module) {
+      var util = require('/node_modules/source-map/lib/source-map/util.js', module);
+      function SourceMapConsumer(aSourceMap) {
+        var sourceMap = aSourceMap;
+        if (typeof aSourceMap === 'string') {
+          sourceMap = JSON.parse(aSourceMap.replace(/^\)\]\}'/, ''));
+        }
+        if (sourceMap.sections != null) {
+          var indexedSourceMapConsumer = require('/node_modules/source-map/lib/source-map/indexed-source-map-consumer.js', module);
+          return new indexedSourceMapConsumer.IndexedSourceMapConsumer(sourceMap);
+        } else {
+          var basicSourceMapConsumer = require('/node_modules/source-map/lib/source-map/basic-source-map-consumer.js', module);
+          return new basicSourceMapConsumer.BasicSourceMapConsumer(sourceMap);
+        }
+      }
+      SourceMapConsumer.fromSourceMap = function (aSourceMap) {
+        var basicSourceMapConsumer = require('/node_modules/source-map/lib/source-map/basic-source-map-consumer.js', module);
+        return basicSourceMapConsumer.BasicSourceMapConsumer.fromSourceMap(aSourceMap);
+      };
+      SourceMapConsumer.prototype._version = 3;
+      SourceMapConsumer.prototype.__generatedMappings = null;
+      Object.defineProperty(SourceMapConsumer.prototype, '_generatedMappings', {
+        get: function () {
+          if (!this.__generatedMappings) {
+            this.__generatedMappings = [];
+            this.__originalMappings = [];
+            this._parseMappings(this._mappings, this.sourceRoot);
+          }
+          return this.__generatedMappings;
+        }
+      });
+      SourceMapConsumer.prototype.__originalMappings = null;
+      Object.defineProperty(SourceMapConsumer.prototype, '_originalMappings', {
+        get: function () {
+          if (!this.__originalMappings) {
+            this.__generatedMappings = [];
+            this.__originalMappings = [];
+            this._parseMappings(this._mappings, this.sourceRoot);
+          }
+          return this.__originalMappings;
+        }
+      });
+      SourceMapConsumer.prototype._nextCharIsMappingSeparator = function SourceMapConsumer_nextCharIsMappingSeparator(aStr) {
+        var c = aStr.charAt(0);
+        return c === ';' || c === ',';
+      };
+      SourceMapConsumer.prototype._parseMappings = function SourceMapConsumer_parseMappings(aStr, aSourceRoot) {
+        throw new Error('Subclasses must implement _parseMappings');
+      };
+      SourceMapConsumer.GENERATED_ORDER = 1;
+      SourceMapConsumer.ORIGINAL_ORDER = 2;
+      SourceMapConsumer.prototype.eachMapping = function SourceMapConsumer_eachMapping(aCallback, aContext, aOrder) {
+        var context = aContext || null;
+        var order = aOrder || SourceMapConsumer.GENERATED_ORDER;
+        var mappings;
+        switch (order) {
+        case SourceMapConsumer.GENERATED_ORDER:
+          mappings = this._generatedMappings;
+          break;
+        case SourceMapConsumer.ORIGINAL_ORDER:
+          mappings = this._originalMappings;
+          break;
+        default:
+          throw new Error('Unknown order of iteration.');
+        }
+        var sourceRoot = this.sourceRoot;
+        mappings.map(function (mapping) {
+          var source = mapping.source;
+          if (source != null && sourceRoot != null) {
+            source = util.join(sourceRoot, source);
+          }
+          return {
+            source: source,
+            generatedLine: mapping.generatedLine,
+            generatedColumn: mapping.generatedColumn,
+            originalLine: mapping.originalLine,
+            originalColumn: mapping.originalColumn,
+            name: mapping.name
+          };
+        }).forEach(aCallback, context);
+      };
+      SourceMapConsumer.prototype.allGeneratedPositionsFor = function SourceMapConsumer_allGeneratedPositionsFor(aArgs) {
+        var needle = {
+            source: util.getArg(aArgs, 'source'),
+            originalLine: util.getArg(aArgs, 'line'),
+            originalColumn: Infinity
+          };
+        if (this.sourceRoot != null) {
+          needle.source = util.relative(this.sourceRoot, needle.source);
+        }
+        var mappings = [];
+        var index = this._findMapping(needle, this._originalMappings, 'originalLine', 'originalColumn', util.compareByOriginalPositions);
+        if (index >= 0) {
+          var mapping = this._originalMappings[index];
+          while (mapping && mapping.originalLine === needle.originalLine) {
+            mappings.push({
+              line: util.getArg(mapping, 'generatedLine', null),
+              column: util.getArg(mapping, 'generatedColumn', null),
+              lastColumn: util.getArg(mapping, 'lastGeneratedColumn', null)
+            });
+            mapping = this._originalMappings[--index];
+          }
+        }
+        return mappings.reverse();
+      };
+      exports.SourceMapConsumer = SourceMapConsumer;
+    });
+  });
+  require.define('/node_modules/source-map/lib/source-map/basic-source-map-consumer.js', function (module, exports, __dirname, __filename) {
+    if (typeof define !== 'function') {
+      var define = require('/node_modules/amdefine/amdefine.js', module)(module, require);
+    }
+    define(function (require, exports, module) {
+      var util = require('/node_modules/source-map/lib/source-map/util.js', module);
+      var binarySearch = require('/node_modules/source-map/lib/source-map/binary-search.js', module);
+      var ArraySet = require('/node_modules/source-map/lib/source-map/array-set.js', module).ArraySet;
+      var base64VLQ = require('/node_modules/source-map/lib/source-map/base64-vlq.js', module);
+      var SourceMapConsumer = require('/node_modules/source-map/lib/source-map/source-map-consumer.js', module).SourceMapConsumer;
+      function BasicSourceMapConsumer(aSourceMap) {
+        var sourceMap = aSourceMap;
+        if (typeof aSourceMap === 'string') {
+          sourceMap = JSON.parse(aSourceMap.replace(/^\)\]\}'/, ''));
+        }
+        var version = util.getArg(sourceMap, 'version');
+        var sources = util.getArg(sourceMap, 'sources');
+        var names = util.getArg(sourceMap, 'names', []);
+        var sourceRoot = util.getArg(sourceMap, 'sourceRoot', null);
+        var sourcesContent = util.getArg(sourceMap, 'sourcesContent', null);
+        var mappings = util.getArg(sourceMap, 'mappings');
+        var file = util.getArg(sourceMap, 'file', null);
+        if (version != this._version) {
+          throw new Error('Unsupported version: ' + version);
+        }
+        sources = sources.map(util.normalize);
+        this._names = ArraySet.fromArray(names, true);
+        this._sources = ArraySet.fromArray(sources, true);
+        this.sourceRoot = sourceRoot;
+        this.sourcesContent = sourcesContent;
+        this._mappings = mappings;
+        this.file = file;
+      }
+      BasicSourceMapConsumer.prototype = Object.create(SourceMapConsumer.prototype);
+      BasicSourceMapConsumer.prototype.consumer = SourceMapConsumer;
+      BasicSourceMapConsumer.fromSourceMap = function SourceMapConsumer_fromSourceMap(aSourceMap) {
+        var smc = Object.create(BasicSourceMapConsumer.prototype);
+        smc._names = ArraySet.fromArray(aSourceMap._names.toArray(), true);
+        smc._sources = ArraySet.fromArray(aSourceMap._sources.toArray(), true);
+        smc.sourceRoot = aSourceMap._sourceRoot;
+        smc.sourcesContent = aSourceMap._generateSourcesContent(smc._sources.toArray(), smc.sourceRoot);
+        smc.file = aSourceMap._file;
+        smc.__generatedMappings = aSourceMap._mappings.toArray().slice();
+        smc.__originalMappings = aSourceMap._mappings.toArray().slice().sort(util.compareByOriginalPositions);
+        return smc;
+      };
+      BasicSourceMapConsumer.prototype._version = 3;
+      Object.defineProperty(BasicSourceMapConsumer.prototype, 'sources', {
+        get: function () {
+          return this._sources.toArray().map(function (s) {
+            return this.sourceRoot != null ? util.join(this.sourceRoot, s) : s;
+          }, this);
+        }
+      });
+      BasicSourceMapConsumer.prototype._parseMappings = function SourceMapConsumer_parseMappings(aStr, aSourceRoot) {
+        var generatedLine = 1;
+        var previousGeneratedColumn = 0;
+        var previousOriginalLine = 0;
+        var previousOriginalColumn = 0;
+        var previousSource = 0;
+        var previousName = 0;
+        var str = aStr;
+        var temp = {};
+        var mapping;
+        while (str.length > 0) {
+          if (str.charAt(0) === ';') {
+            generatedLine++;
+            str = str.slice(1);
+            previousGeneratedColumn = 0;
+          } else if (str.charAt(0) === ',') {
+            str = str.slice(1);
+          } else {
+            mapping = {};
+            mapping.generatedLine = generatedLine;
+            base64VLQ.decode(str, temp);
+            mapping.generatedColumn = previousGeneratedColumn + temp.value;
+            previousGeneratedColumn = mapping.generatedColumn;
+            str = temp.rest;
+            if (str.length > 0 && !this._nextCharIsMappingSeparator(str)) {
+              base64VLQ.decode(str, temp);
+              mapping.source = this._sources.at(previousSource + temp.value);
+              previousSource += temp.value;
+              str = temp.rest;
+              if (str.length === 0 || this._nextCharIsMappingSeparator(str)) {
+                throw new Error('Found a source, but no line and column');
+              }
+              base64VLQ.decode(str, temp);
+              mapping.originalLine = previousOriginalLine + temp.value;
+              previousOriginalLine = mapping.originalLine;
+              mapping.originalLine += 1;
+              str = temp.rest;
+              if (str.length === 0 || this._nextCharIsMappingSeparator(str)) {
+                throw new Error('Found a source and line, but no column');
+              }
+              base64VLQ.decode(str, temp);
+              mapping.originalColumn = previousOriginalColumn + temp.value;
+              previousOriginalColumn = mapping.originalColumn;
+              str = temp.rest;
+              if (str.length > 0 && !this._nextCharIsMappingSeparator(str)) {
+                base64VLQ.decode(str, temp);
+                mapping.name = this._names.at(previousName + temp.value);
+                previousName += temp.value;
+                str = temp.rest;
+              }
+            }
+            this.__generatedMappings.push(mapping);
+            if (typeof mapping.originalLine === 'number') {
+              this.__originalMappings.push(mapping);
+            }
+          }
+        }
+        this.__generatedMappings.sort(util.compareByGeneratedPositions);
+        this.__originalMappings.sort(util.compareByOriginalPositions);
+      };
+      BasicSourceMapConsumer.prototype._findMapping = function SourceMapConsumer_findMapping(aNeedle, aMappings, aLineName, aColumnName, aComparator) {
+        if (aNeedle[aLineName] <= 0) {
+          throw new TypeError('Line must be greater than or equal to 1, got ' + aNeedle[aLineName]);
+        }
+        if (aNeedle[aColumnName] < 0) {
+          throw new TypeError('Column must be greater than or equal to 0, got ' + aNeedle[aColumnName]);
+        }
+        return binarySearch.search(aNeedle, aMappings, aComparator);
+      };
+      BasicSourceMapConsumer.prototype.computeColumnSpans = function SourceMapConsumer_computeColumnSpans() {
+        for (var index = 0; index < this._generatedMappings.length; ++index) {
+          var mapping = this._generatedMappings[index];
+          if (index + 1 < this._generatedMappings.length) {
+            var nextMapping = this._generatedMappings[index + 1];
+            if (mapping.generatedLine === nextMapping.generatedLine) {
+              mapping.lastGeneratedColumn = nextMapping.generatedColumn - 1;
+              continue;
+            }
+          }
+          mapping.lastGeneratedColumn = Infinity;
+        }
+      };
+      BasicSourceMapConsumer.prototype.originalPositionFor = function SourceMapConsumer_originalPositionFor(aArgs) {
+        var needle = {
+            generatedLine: util.getArg(aArgs, 'line'),
+            generatedColumn: util.getArg(aArgs, 'column')
+          };
+        var index = this._findMapping(needle, this._generatedMappings, 'generatedLine', 'generatedColumn', util.compareByGeneratedPositions);
+        if (index >= 0) {
+          var mapping = this._generatedMappings[index];
+          if (mapping.generatedLine === needle.generatedLine) {
+            var source = util.getArg(mapping, 'source', null);
+            if (source != null && this.sourceRoot != null) {
+              source = util.join(this.sourceRoot, source);
+            }
+            return {
+              source: source,
+              line: util.getArg(mapping, 'originalLine', null),
+              column: util.getArg(mapping, 'originalColumn', null),
+              name: util.getArg(mapping, 'name', null)
+            };
+          }
+        }
+        return {
+          source: null,
+          line: null,
+          column: null,
+          name: null
+        };
+      };
+      BasicSourceMapConsumer.prototype.sourceContentFor = function SourceMapConsumer_sourceContentFor(aSource, nullOnMissing) {
+        if (!this.sourcesContent) {
+          return null;
+        }
+        if (this.sourceRoot != null) {
+          aSource = util.relative(this.sourceRoot, aSource);
+        }
+        if (this._sources.has(aSource)) {
+          return this.sourcesContent[this._sources.indexOf(aSource)];
+        }
+        var url;
+        if (this.sourceRoot != null && (url = util.urlParse(this.sourceRoot))) {
+          var fileUriAbsPath = aSource.replace(/^file:\/\//, '');
+          if (url.scheme == 'file' && this._sources.has(fileUriAbsPath)) {
+            return this.sourcesContent[this._sources.indexOf(fileUriAbsPath)];
+          }
+          if ((!url.path || url.path == '/') && this._sources.has('/' + aSource)) {
+            return this.sourcesContent[this._sources.indexOf('/' + aSource)];
+          }
+        }
+        if (nullOnMissing) {
+          return null;
+        } else {
+          throw new Error('"' + aSource + '" is not in the SourceMap.');
+        }
+      };
+      BasicSourceMapConsumer.prototype.generatedPositionFor = function SourceMapConsumer_generatedPositionFor(aArgs) {
+        var needle = {
+            source: util.getArg(aArgs, 'source'),
+            originalLine: util.getArg(aArgs, 'line'),
+            originalColumn: util.getArg(aArgs, 'column')
+          };
+        if (this.sourceRoot != null) {
+          needle.source = util.relative(this.sourceRoot, needle.source);
+        }
+        var index = this._findMapping(needle, this._originalMappings, 'originalLine', 'originalColumn', util.compareByOriginalPositions);
+        if (index >= 0) {
+          var mapping = this._originalMappings[index];
+          return {
+            line: util.getArg(mapping, 'generatedLine', null),
+            column: util.getArg(mapping, 'generatedColumn', null),
+            lastColumn: util.getArg(mapping, 'lastGeneratedColumn', null)
+          };
+        }
+        return {
+          line: null,
+          column: null,
+          lastColumn: null
+        };
+      };
+      exports.BasicSourceMapConsumer = BasicSourceMapConsumer;
+    });
+  });
+  require.define('/node_modules/source-map/lib/source-map/binary-search.js', function (module, exports, __dirname, __filename) {
+    if (typeof define !== 'function') {
+      var define = require('/node_modules/amdefine/amdefine.js', module)(module, require);
+    }
+    define(function (require, exports, module) {
+      function recursiveSearch(aLow, aHigh, aNeedle, aHaystack, aCompare) {
+        var mid = Math.floor((aHigh - aLow) / 2) + aLow;
+        var cmp = aCompare(aNeedle, aHaystack[mid], true);
+        if (cmp === 0) {
+          return mid;
+        } else if (cmp > 0) {
+          if (aHigh - mid > 1) {
+            return recursiveSearch(mid, aHigh, aNeedle, aHaystack, aCompare);
+          }
+          return mid;
+        } else {
+          if (mid - aLow > 1) {
+            return recursiveSearch(aLow, mid, aNeedle, aHaystack, aCompare);
+          }
+          return aLow < 0 ? -1 : aLow;
+        }
+      }
+      exports.search = function search(aNeedle, aHaystack, aCompare) {
+        if (aHaystack.length === 0) {
+          return -1;
+        }
+        return recursiveSearch(-1, aHaystack.length, aNeedle, aHaystack, aCompare);
+      };
+    });
+  });
+  require.define('/node_modules/source-map/lib/source-map/indexed-source-map-consumer.js', function (module, exports, __dirname, __filename) {
+    if (typeof define !== 'function') {
+      var define = require('/node_modules/amdefine/amdefine.js', module)(module, require);
+    }
+    define(function (require, exports, module) {
+      var util = require('/node_modules/source-map/lib/source-map/util.js', module);
+      var binarySearch = require('/node_modules/source-map/lib/source-map/binary-search.js', module);
+      var SourceMapConsumer = require('/node_modules/source-map/lib/source-map/source-map-consumer.js', module).SourceMapConsumer;
+      var BasicSourceMapConsumer = require('/node_modules/source-map/lib/source-map/basic-source-map-consumer.js', module).BasicSourceMapConsumer;
+      function IndexedSourceMapConsumer(aSourceMap) {
+        var sourceMap = aSourceMap;
+        if (typeof aSourceMap === 'string') {
+          sourceMap = JSON.parse(aSourceMap.replace(/^\)\]\}'/, ''));
+        }
+        var version = util.getArg(sourceMap, 'version');
+        var sections = util.getArg(sourceMap, 'sections');
+        if (version != this._version) {
+          throw new Error('Unsupported version: ' + version);
+        }
+        var lastOffset = {
+            line: -1,
+            column: 0
+          };
+        this._sections = sections.map(function (s) {
+          if (s.url) {
+            throw new Error('Support for url field in sections not implemented.');
+          }
+          var offset = util.getArg(s, 'offset');
+          var offsetLine = util.getArg(offset, 'line');
+          var offsetColumn = util.getArg(offset, 'column');
+          if (offsetLine < lastOffset.line || offsetLine === lastOffset.line && offsetColumn < lastOffset.column) {
+            throw new Error('Section offsets must be ordered and non-overlapping.');
+          }
+          lastOffset = offset;
+          return {
+            generatedOffset: {
+              generatedLine: offsetLine + 1,
+              generatedColumn: offsetColumn + 1
+            },
+            consumer: new SourceMapConsumer(util.getArg(s, 'map'))
+          };
+        });
+      }
+      IndexedSourceMapConsumer.prototype = Object.create(SourceMapConsumer.prototype);
+      IndexedSourceMapConsumer.prototype.constructor = SourceMapConsumer;
+      IndexedSourceMapConsumer.prototype._version = 3;
+      Object.defineProperty(IndexedSourceMapConsumer.prototype, 'sources', {
+        get: function () {
+          var sources = [];
+          for (var i = 0; i < this._sections.length; i++) {
+            for (var j = 0; j < this._sections[i].consumer.sources.length; j++) {
+              sources.push(this._sections[i].consumer.sources[j]);
+            }
+          }
+          ;
+          return sources;
+        }
+      });
+      IndexedSourceMapConsumer.prototype.originalPositionFor = function IndexedSourceMapConsumer_originalPositionFor(aArgs) {
+        var needle = {
+            generatedLine: util.getArg(aArgs, 'line'),
+            generatedColumn: util.getArg(aArgs, 'column')
+          };
+        var sectionIndex = binarySearch.search(needle, this._sections, function (needle, section) {
+            var cmp = needle.generatedLine - section.generatedOffset.generatedLine;
+            if (cmp) {
+              return cmp;
+            }
+            return needle.generatedColumn - section.generatedOffset.generatedColumn;
+          });
+        var section = this._sections[sectionIndex];
+        if (!section) {
+          return {
+            source: null,
+            line: null,
+            column: null,
+            name: null
+          };
+        }
+        return section.consumer.originalPositionFor({
+          line: needle.generatedLine - (section.generatedOffset.generatedLine - 1),
+          column: needle.generatedColumn - (section.generatedOffset.generatedLine === needle.generatedLine ? section.generatedOffset.generatedColumn - 1 : 0)
+        });
+      };
+      IndexedSourceMapConsumer.prototype.sourceContentFor = function IndexedSourceMapConsumer_sourceContentFor(aSource, nullOnMissing) {
+        for (var i = 0; i < this._sections.length; i++) {
+          var section = this._sections[i];
+          var content = section.consumer.sourceContentFor(aSource, true);
+          if (content) {
+            return content;
+          }
+        }
+        if (nullOnMissing) {
+          return null;
+        } else {
+          throw new Error('"' + aSource + '" is not in the SourceMap.');
+        }
+      };
+      IndexedSourceMapConsumer.prototype.generatedPositionFor = function IndexedSourceMapConsumer_generatedPositionFor(aArgs) {
+        for (var i = 0; i < this._sections.length; i++) {
+          var section = this._sections[i];
+          if (section.consumer.sources.indexOf(util.getArg(aArgs, 'source')) === -1) {
+            continue;
+          }
+          var generatedPosition = section.consumer.generatedPositionFor(aArgs);
+          if (generatedPosition) {
+            var ret = {
+                line: generatedPosition.line + (section.generatedOffset.generatedLine - 1),
+                column: generatedPosition.column + (section.generatedOffset.generatedLine === generatedPosition.line ? section.generatedOffset.generatedColumn - 1 : 0)
+              };
+            return ret;
+          }
+        }
+        return {
+          line: null,
+          column: null
+        };
+      };
+      IndexedSourceMapConsumer.prototype._parseMappings = function IndexedSourceMapConsumer_parseMappings(aStr, aSourceRoot) {
+        this.__generatedMappings = [];
+        this.__originalMappings = [];
+        for (var i = 0; i < this._sections.length; i++) {
+          var section = this._sections[i];
+          var sectionMappings = section.consumer._generatedMappings;
+          for (var j = 0; j < sectionMappings.length; j++) {
+            var mapping = sectionMappings[i];
+            var source = mapping.source;
+            var sourceRoot = section.consumer.sourceRoot;
+            if (source != null && sourceRoot != null) {
+              source = util.join(sourceRoot, source);
+            }
+            var adjustedMapping = {
+                source: source,
+                generatedLine: mapping.generatedLine + (section.generatedOffset.generatedLine - 1),
+                generatedColumn: mapping.column + (section.generatedOffset.generatedLine === mapping.generatedLine) ? section.generatedOffset.generatedColumn - 1 : 0,
+                originalLine: mapping.originalLine,
+                originalColumn: mapping.originalColumn,
+                name: mapping.name
+              };
+            this.__generatedMappings.push(adjustedMapping);
+            if (typeof adjustedMapping.originalLine === 'number') {
+              this.__originalMappings.push(adjustedMapping);
+            }
+          }
+          ;
+        }
+        ;
+        this.__generatedMappings.sort(util.compareByGeneratedPositions);
+        this.__originalMappings.sort(util.compareByOriginalPositions);
+      };
+      exports.IndexedSourceMapConsumer = IndexedSourceMapConsumer;
+    });
+  });
+  require.define('/node_modules/esutils/lib/utils.js', function (module, exports, __dirname, __filename) {
+    (function () {
+      'use strict';
+      exports.ast = require('/node_modules/esutils/lib/ast.js', module);
+      exports.code = require('/node_modules/esutils/lib/code.js', module);
+      exports.keyword = require('/node_modules/esutils/lib/keyword.js', module);
+    }());
+  });
+  require.define('/node_modules/esutils/lib/keyword.js', function (module, exports, __dirname, __filename) {
+    (function () {
+      'use strict';
+      var code = require('/node_modules/esutils/lib/code.js', module);
+      function isStrictModeReservedWordES6(id) {
+        switch (id) {
+        case 'implements':
+        case 'interface':
+        case 'package':
+        case 'private':
+        case 'protected':
+        case 'public':
+        case 'static':
+        case 'let':
+          return true;
+        default:
+          return false;
+        }
+      }
+      function isKeywordES5(id, strict) {
+        if (!strict && id === 'yield') {
+          return false;
+        }
+        return isKeywordES6(id, strict);
+      }
+      function isKeywordES6(id, strict) {
+        if (strict && isStrictModeReservedWordES6(id)) {
+          return true;
+        }
+        switch (id.length) {
+        case 2:
+          return id === 'if' || id === 'in' || id === 'do';
+        case 3:
+          return id === 'var' || id === 'for' || id === 'new' || id === 'try';
+        case 4:
+          return id === 'this' || id === 'else' || id === 'case' || id === 'void' || id === 'with' || id === 'enum';
+        case 5:
+          return id === 'while' || id === 'break' || id === 'catch' || id === 'throw' || id === 'const' || id === 'yield' || id === 'class' || id === 'super';
+        case 6:
+          return id === 'return' || id === 'typeof' || id === 'delete' || id === 'switch' || id === 'export' || id === 'import';
+        case 7:
+          return id === 'default' || id === 'finally' || id === 'extends';
+        case 8:
+          return id === 'function' || id === 'continue' || id === 'debugger';
+        case 10:
+          return id === 'instanceof';
+        default:
+          return false;
+        }
+      }
+      function isReservedWordES5(id, strict) {
+        return id === 'null' || id === 'true' || id === 'false' || isKeywordES5(id, strict);
+      }
+      function isReservedWordES6(id, strict) {
+        return id === 'null' || id === 'true' || id === 'false' || isKeywordES6(id, strict);
+      }
+      function isRestrictedWord(id) {
+        return id === 'eval' || id === 'arguments';
+      }
+      function isIdentifierNameES5(id) {
+        var i, iz, ch;
+        if (id.length === 0) {
+          return false;
+        }
+        ch = id.charCodeAt(0);
+        if (!code.isIdentifierStartES5(ch)) {
+          return false;
+        }
+        for (i = 1, iz = id.length; i < iz; ++i) {
+          ch = id.charCodeAt(i);
+          if (!code.isIdentifierPartES5(ch)) {
+            return false;
+          }
+        }
+        return true;
+      }
+      function decodeUtf16(lead, trail) {
+        return (lead - 55296) * 1024 + (trail - 56320) + 65536;
+      }
+      function isIdentifierNameES6(id) {
+        var i, iz, ch, lowCh, check;
+        if (id.length === 0) {
+          return false;
+        }
+        check = code.isIdentifierStartES6;
+        for (i = 0, iz = id.length; i < iz; ++i) {
+          ch = id.charCodeAt(i);
+          if (55296 <= ch && ch <= 56319) {
+            ++i;
+            if (i >= iz) {
+              return false;
+            }
+            lowCh = id.charCodeAt(i);
+            if (!(56320 <= lowCh && lowCh <= 57343)) {
+              return false;
+            }
+            ch = decodeUtf16(ch, lowCh);
+          }
+          if (!check(ch)) {
+            return false;
+          }
+          check = code.isIdentifierPartES6;
+        }
+        return true;
+      }
+      function isIdentifierES5(id, strict) {
+        return isIdentifierNameES5(id) && !isReservedWordES5(id, strict);
+      }
+      function isIdentifierES6(id, strict) {
+        return isIdentifierNameES6(id) && !isReservedWordES6(id, strict);
+      }
+      module.exports = {
+        isKeywordES5: isKeywordES5,
+        isKeywordES6: isKeywordES6,
+        isReservedWordES5: isReservedWordES5,
+        isReservedWordES6: isReservedWordES6,
+        isRestrictedWord: isRestrictedWord,
+        isIdentifierNameES5: isIdentifierNameES5,
+        isIdentifierNameES6: isIdentifierNameES6,
+        isIdentifierES5: isIdentifierES5,
+        isIdentifierES6: isIdentifierES6
+      };
+    }());
+  });
+  require.define('/node_modules/esutils/lib/code.js', function (module, exports, __dirname, __filename) {
+    (function () {
+      'use strict';
+      var ES6Regex, ES5Regex, NON_ASCII_WHITESPACES, IDENTIFIER_START, IDENTIFIER_PART, ch;
+      ES5Regex = {
+        NonAsciiIdentifierStart: /[\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-\u08B2\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\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\u0C59\u0C60\u0C61\u0C85-\u0C8C\u0C8E-\u0C90\u0C92-\u0CA8\u0CAA-\u0CB3\u0CB5-\u0CB9\u0CBD\u0CDE\u0CE0\u0CE1\u0CF1\u0CF2\u0D05-\u0D0C\u0D0E-\u0D10\u0D12-\u0D3A\u0D3D\u0D4E\u0D60\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-\u13F4\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\u19C1-\u19C7\u1A00-\u1A16\u1A20-\u1A54\u1AA7\u1B05-\u1B33\u1B45-\u1B4B\u1B83-\u1BA0\u1BAE\u1BAF\u1BBA-\u1BE5\u1C00-\u1C23\u1C4D-\u1C4F\u1C5A-\u1C7D\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\u2119-\u211D\u2124\u2126\u2128\u212A-\u212D\u212F-\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\u2E2F\u3005-\u3007\u3021-\u3029\u3031-\u3035\u3038-\u303C\u3041-\u3096\u309D-\u309F\u30A1-\u30FA\u30FC-\u30FF\u3105-\u312D\u3131-\u318E\u31A0-\u31BA\u31F0-\u31FF\u3400-\u4DB5\u4E00-\u9FCC\uA000-\uA48C\uA4D0-\uA4FD\uA500-\uA60C\uA610-\uA61F\uA62A\uA62B\uA640-\uA66E\uA67F-\uA69D\uA6A0-\uA6EF\uA717-\uA71F\uA722-\uA788\uA78B-\uA78E\uA790-\uA7AD\uA7B0\uA7B1\uA7F7-\uA801\uA803-\uA805\uA807-\uA80A\uA80C-\uA822\uA840-\uA873\uA882-\uA8B3\uA8F2-\uA8F7\uA8FB\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-\uAB5F\uAB64\uAB65\uABC0-\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]/,
+        NonAsciiIdentifierPart: /[\xAA\xB5\xBA\xC0-\xD6\xD8-\xF6\xF8-\u02C1\u02C6-\u02D1\u02E0-\u02E4\u02EC\u02EE\u0300-\u0374\u0376\u0377\u037A-\u037D\u037F\u0386\u0388-\u038A\u038C\u038E-\u03A1\u03A3-\u03F5\u03F7-\u0481\u0483-\u0487\u048A-\u052F\u0531-\u0556\u0559\u0561-\u0587\u0591-\u05BD\u05BF\u05C1\u05C2\u05C4\u05C5\u05C7\u05D0-\u05EA\u05F0-\u05F2\u0610-\u061A\u0620-\u0669\u066E-\u06D3\u06D5-\u06DC\u06DF-\u06E8\u06EA-\u06FC\u06FF\u0710-\u074A\u074D-\u07B1\u07C0-\u07F5\u07FA\u0800-\u082D\u0840-\u085B\u08A0-\u08B2\u08E4-\u0963\u0966-\u096F\u0971-\u0983\u0985-\u098C\u098F\u0990\u0993-\u09A8\u09AA-\u09B0\u09B2\u09B6-\u09B9\u09BC-\u09C4\u09C7\u09C8\u09CB-\u09CE\u09D7\u09DC\u09DD\u09DF-\u09E3\u09E6-\u09F1\u0A01-\u0A03\u0A05-\u0A0A\u0A0F\u0A10\u0A13-\u0A28\u0A2A-\u0A30\u0A32\u0A33\u0A35\u0A36\u0A38\u0A39\u0A3C\u0A3E-\u0A42\u0A47\u0A48\u0A4B-\u0A4D\u0A51\u0A59-\u0A5C\u0A5E\u0A66-\u0A75\u0A81-\u0A83\u0A85-\u0A8D\u0A8F-\u0A91\u0A93-\u0AA8\u0AAA-\u0AB0\u0AB2\u0AB3\u0AB5-\u0AB9\u0ABC-\u0AC5\u0AC7-\u0AC9\u0ACB-\u0ACD\u0AD0\u0AE0-\u0AE3\u0AE6-\u0AEF\u0B01-\u0B03\u0B05-\u0B0C\u0B0F\u0B10\u0B13-\u0B28\u0B2A-\u0B30\u0B32\u0B33\u0B35-\u0B39\u0B3C-\u0B44\u0B47\u0B48\u0B4B-\u0B4D\u0B56\u0B57\u0B5C\u0B5D\u0B5F-\u0B63\u0B66-\u0B6F\u0B71\u0B82\u0B83\u0B85-\u0B8A\u0B8E-\u0B90\u0B92-\u0B95\u0B99\u0B9A\u0B9C\u0B9E\u0B9F\u0BA3\u0BA4\u0BA8-\u0BAA\u0BAE-\u0BB9\u0BBE-\u0BC2\u0BC6-\u0BC8\u0BCA-\u0BCD\u0BD0\u0BD7\u0BE6-\u0BEF\u0C00-\u0C03\u0C05-\u0C0C\u0C0E-\u0C10\u0C12-\u0C28\u0C2A-\u0C39\u0C3D-\u0C44\u0C46-\u0C48\u0C4A-\u0C4D\u0C55\u0C56\u0C58\u0C59\u0C60-\u0C63\u0C66-\u0C6F\u0C81-\u0C83\u0C85-\u0C8C\u0C8E-\u0C90\u0C92-\u0CA8\u0CAA-\u0CB3\u0CB5-\u0CB9\u0CBC-\u0CC4\u0CC6-\u0CC8\u0CCA-\u0CCD\u0CD5\u0CD6\u0CDE\u0CE0-\u0CE3\u0CE6-\u0CEF\u0CF1\u0CF2\u0D01-\u0D03\u0D05-\u0D0C\u0D0E-\u0D10\u0D12-\u0D3A\u0D3D-\u0D44\u0D46-\u0D48\u0D4A-\u0D4E\u0D57\u0D60-\u0D63\u0D66-\u0D6F\u0D7A-\u0D7F\u0D82\u0D83\u0D85-\u0D96\u0D9A-\u0DB1\u0DB3-\u0DBB\u0DBD\u0DC0-\u0DC6\u0DCA\u0DCF-\u0DD4\u0DD6\u0DD8-\u0DDF\u0DE6-\u0DEF\u0DF2\u0DF3\u0E01-\u0E3A\u0E40-\u0E4E\u0E50-\u0E59\u0E81\u0E82\u0E84\u0E87\u0E88\u0E8A\u0E8D\u0E94-\u0E97\u0E99-\u0E9F\u0EA1-\u0EA3\u0EA5\u0EA7\u0EAA\u0EAB\u0EAD-\u0EB9\u0EBB-\u0EBD\u0EC0-\u0EC4\u0EC6\u0EC8-\u0ECD\u0ED0-\u0ED9\u0EDC-\u0EDF\u0F00\u0F18\u0F19\u0F20-\u0F29\u0F35\u0F37\u0F39\u0F3E-\u0F47\u0F49-\u0F6C\u0F71-\u0F84\u0F86-\u0F97\u0F99-\u0FBC\u0FC6\u1000-\u1049\u1050-\u109D\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\u135D-\u135F\u1380-\u138F\u13A0-\u13F4\u1401-\u166C\u166F-\u167F\u1681-\u169A\u16A0-\u16EA\u16EE-\u16F8\u1700-\u170C\u170E-\u1714\u1720-\u1734\u1740-\u1753\u1760-\u176C\u176E-\u1770\u1772\u1773\u1780-\u17D3\u17D7\u17DC\u17DD\u17E0-\u17E9\u180B-\u180D\u1810-\u1819\u1820-\u1877\u1880-\u18AA\u18B0-\u18F5\u1900-\u191E\u1920-\u192B\u1930-\u193B\u1946-\u196D\u1970-\u1974\u1980-\u19AB\u19B0-\u19C9\u19D0-\u19D9\u1A00-\u1A1B\u1A20-\u1A5E\u1A60-\u1A7C\u1A7F-\u1A89\u1A90-\u1A99\u1AA7\u1AB0-\u1ABD\u1B00-\u1B4B\u1B50-\u1B59\u1B6B-\u1B73\u1B80-\u1BF3\u1C00-\u1C37\u1C40-\u1C49\u1C4D-\u1C7D\u1CD0-\u1CD2\u1CD4-\u1CF6\u1CF8\u1CF9\u1D00-\u1DF5\u1DFC-\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\u200C\u200D\u203F\u2040\u2054\u2071\u207F\u2090-\u209C\u20D0-\u20DC\u20E1\u20E5-\u20F0\u2102\u2107\u210A-\u2113\u2115\u2119-\u211D\u2124\u2126\u2128\u212A-\u212D\u212F-\u2139\u213C-\u213F\u2145-\u2149\u214E\u2160-\u2188\u2C00-\u2C2E\u2C30-\u2C5E\u2C60-\u2CE4\u2CEB-\u2CF3\u2D00-\u2D25\u2D27\u2D2D\u2D30-\u2D67\u2D6F\u2D7F-\u2D96\u2DA0-\u2DA6\u2DA8-\u2DAE\u2DB0-\u2DB6\u2DB8-\u2DBE\u2DC0-\u2DC6\u2DC8-\u2DCE\u2DD0-\u2DD6\u2DD8-\u2DDE\u2DE0-\u2DFF\u2E2F\u3005-\u3007\u3021-\u302F\u3031-\u3035\u3038-\u303C\u3041-\u3096\u3099\u309A\u309D-\u309F\u30A1-\u30FA\u30FC-\u30FF\u3105-\u312D\u3131-\u318E\u31A0-\u31BA\u31F0-\u31FF\u3400-\u4DB5\u4E00-\u9FCC\uA000-\uA48C\uA4D0-\uA4FD\uA500-\uA60C\uA610-\uA62B\uA640-\uA66F\uA674-\uA67D\uA67F-\uA69D\uA69F-\uA6F1\uA717-\uA71F\uA722-\uA788\uA78B-\uA78E\uA790-\uA7AD\uA7B0\uA7B1\uA7F7-\uA827\uA840-\uA873\uA880-\uA8C4\uA8D0-\uA8D9\uA8E0-\uA8F7\uA8FB\uA900-\uA92D\uA930-\uA953\uA960-\uA97C\uA980-\uA9C0\uA9CF-\uA9D9\uA9E0-\uA9FE\uAA00-\uAA36\uAA40-\uAA4D\uAA50-\uAA59\uAA60-\uAA76\uAA7A-\uAAC2\uAADB-\uAADD\uAAE0-\uAAEF\uAAF2-\uAAF6\uAB01-\uAB06\uAB09-\uAB0E\uAB11-\uAB16\uAB20-\uAB26\uAB28-\uAB2E\uAB30-\uAB5A\uAB5C-\uAB5F\uAB64\uAB65\uABC0-\uABEA\uABEC\uABED\uABF0-\uABF9\uAC00-\uD7A3\uD7B0-\uD7C6\uD7CB-\uD7FB\uF900-\uFA6D\uFA70-\uFAD9\uFB00-\uFB06\uFB13-\uFB17\uFB1D-\uFB28\uFB2A-\uFB36\uFB38-\uFB3C\uFB3E\uFB40\uFB41\uFB43\uFB44\uFB46-\uFBB1\uFBD3-\uFD3D\uFD50-\uFD8F\uFD92-\uFDC7\uFDF0-\uFDFB\uFE00-\uFE0F\uFE20-\uFE2D\uFE33\uFE34\uFE4D-\uFE4F\uFE70-\uFE74\uFE76-\uFEFC\uFF10-\uFF19\uFF21-\uFF3A\uFF3F\uFF41-\uFF5A\uFF66-\uFFBE\uFFC2-\uFFC7\uFFCA-\uFFCF\uFFD2-\uFFD7\uFFDA-\uFFDC]/
+      };
+      ES6Regex = {
+        NonAsciiIdentifierStart: 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+        NonAsciiIdentifierPart: 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+      };
+      function isDecimalDigit(ch) {
+        return 48 <= ch && ch <= 57;
+      }
+      function isHexDigit(ch) {
+        return 48 <= ch && ch <= 57 || 97 <= ch && ch <= 102 || 65 <= ch && ch <= 70;
+      }
+      function isOctalDigit(ch) {
+        return ch >= 48 && ch <= 55;
+      }
+      NON_ASCII_WHITESPACES = [
+        5760,
+        6158,
+        8192,
+        8193,
+        8194,
+        8195,
+        8196,
+        8197,
+        8198,
+        8199,
+        8200,
+        8201,
+        8202,
+        8239,
+        8287,
+        12288,
+        65279
+      ];
+      function isWhiteSpace(ch) {
+        return ch === 32 || ch === 9 || ch === 11 || ch === 12 || ch === 160 || ch >= 5760 && NON_ASCII_WHITESPACES.indexOf(ch) >= 0;
+      }
+      function isLineTerminator(ch) {
+        return ch === 10 || ch === 13 || ch === 8232 || ch === 8233;
+      }
+      function fromCodePoint(cp) {
+        if (cp <= 65535) {
+          return String.fromCharCode(cp);
+        }
+        var cu1 = String.fromCharCode(Math.floor((cp - 65536) / 1024) + 55296);
+        var cu2 = String.fromCharCode((cp - 65536) % 1024 + 56320);
+        return cu1 + cu2;
+      }
+      IDENTIFIER_START = new Array(128);
+      for (ch = 0; ch < 128; ++ch) {
+        IDENTIFIER_START[ch] = ch >= 97 && ch <= 122 || ch >= 65 && ch <= 90 || ch === 36 || ch === 95;
+      }
+      IDENTIFIER_PART = new Array(128);
+      for (ch = 0; ch < 128; ++ch) {
+        IDENTIFIER_PART[ch] = ch >= 97 && ch <= 122 || ch >= 65 && ch <= 90 || ch >= 48 && ch <= 57 || ch === 36 || ch === 95;
+      }
+      function isIdentifierStartES5(ch) {
+        return ch < 128 ? IDENTIFIER_START[ch] : ES5Regex.NonAsciiIdentifierStart.test(fromCodePoint(ch));
+      }
+      function isIdentifierPartES5(ch) {
+        return ch < 128 ? IDENTIFIER_PART[ch] : ES5Regex.NonAsciiIdentifierPart.test(fromCodePoint(ch));
+      }
+      function isIdentifierStartES6(ch) {
+        return ch < 128 ? IDENTIFIER_START[ch] : ES6Regex.NonAsciiIdentifierStart.test(fromCodePoint(ch));
+      }
+      function isIdentifierPartES6(ch) {
+        return ch < 128 ? IDENTIFIER_PART[ch] : ES6Regex.NonAsciiIdentifierPart.test(fromCodePoint(ch));
+      }
+      module.exports = {
+        isDecimalDigit: isDecimalDigit,
+        isHexDigit: isHexDigit,
+        isOctalDigit: isOctalDigit,
+        isWhiteSpace: isWhiteSpace,
+        isLineTerminator: isLineTerminator,
+        isIdentifierStartES5: isIdentifierStartES5,
+        isIdentifierPartES5: isIdentifierPartES5,
+        isIdentifierStartES6: isIdentifierStartES6,
+        isIdentifierPartES6: isIdentifierPartES6
+      };
+    }());
+  });
+  require.define('/node_modules/esutils/lib/ast.js', function (module, exports, __dirname, __filename) {
+    (function () {
+      'use strict';
+      function isExpression(node) {
+        if (node == null) {
+          return false;
+        }
+        switch (node.type) {
+        case 'ArrayExpression':
+        case 'AssignmentExpression':
+        case 'BinaryExpression':
+        case 'CallExpression':
+        case 'ConditionalExpression':
+        case 'FunctionExpression':
+        case 'Identifier':
+        case 'Literal':
+        case 'LogicalExpression':
+        case 'MemberExpression':
+        case 'NewExpression':
+        case 'ObjectExpression':
+        case 'SequenceExpression':
+        case 'ThisExpression':
+        case 'UnaryExpression':
+        case 'UpdateExpression':
+          return true;
+        }
+        return false;
+      }
+      function isIterationStatement(node) {
+        if (node == null) {
+          return false;
+        }
+        switch (node.type) {
+        case 'DoWhileStatement':
+        case 'ForInStatement':
+        case 'ForStatement':
+        case 'WhileStatement':
+          return true;
+        }
+        return false;
+      }
+      function isStatement(node) {
+        if (node == null) {
+          return false;
+        }
+        switch (node.type) {
+        case 'BlockStatement':
+        case 'BreakStatement':
+        case 'ContinueStatement':
+        case 'DebuggerStatement':
+        case 'DoWhileStatement':
+        case 'EmptyStatement':
+        case 'ExpressionStatement':
+        case 'ForInStatement':
+        case 'ForStatement':
+        case 'IfStatement':
+        case 'LabeledStatement':
+        case 'ReturnStatement':
+        case 'SwitchStatement':
+        case 'ThrowStatement':
+        case 'TryStatement':
+        case 'VariableDeclaration':
+        case 'WhileStatement':
+        case 'WithStatement':
+          return true;
+        }
+        return false;
+      }
+      function isSourceElement(node) {
+        return isStatement(node) || node != null && node.type === 'FunctionDeclaration';
+      }
+      function trailingStatement(node) {
+        switch (node.type) {
+        case 'IfStatement':
+          if (node.alternate != null) {
+            return node.alternate;
+          }
+          return node.consequent;
+        case 'LabeledStatement':
+        case 'ForStatement':
+        case 'ForInStatement':
+        case 'WhileStatement':
+        case 'WithStatement':
+          return node.body;
+        }
+        return null;
+      }
+      function isProblematicIfStatement(node) {
+        var current;
+        if (node.type !== 'IfStatement') {
+          return false;
+        }
+        if (node.alternate == null) {
+          return false;
+        }
+        current = node.consequent;
+        do {
+          if (current.type === 'IfStatement') {
+            if (current.alternate == null) {
+              return true;
+            }
+          }
+          current = trailingStatement(current);
+        } while (current);
+        return false;
+      }
+      module.exports = {
+        isExpression: isExpression,
+        isStatement: isStatement,
+        isIterationStatement: isIterationStatement,
+        isSourceElement: isSourceElement,
+        isProblematicIfStatement: isProblematicIfStatement,
+        trailingStatement: trailingStatement
+      };
+    }());
+  });
+  require.define('/node_modules/estraverse/estraverse.js', function (module, exports, __dirname, __filename) {
+    (function (root, factory) {
+      'use strict';
+      if (typeof define === 'function' && define.amd) {
+        define(['exports'], factory);
+      } else if (typeof exports !== 'undefined') {
+        factory(exports);
+      } else {
+        factory(root.estraverse = {});
+      }
+    }(this, function clone(exports) {
+      'use strict';
+      var Syntax, isArray, VisitorOption, VisitorKeys, objectCreate, objectKeys, BREAK, SKIP, REMOVE;
+      function ignoreJSHintError() {
+      }
+      isArray = Array.isArray;
+      if (!isArray) {
+        isArray = function isArray(array) {
+          return Object.prototype.toString.call(array) === '[object Array]';
+        };
+      }
+      function deepCopy(obj) {
+        var ret = {}, key, val;
+        for (key in obj) {
+          if (obj.hasOwnProperty(key)) {
+            val = obj[key];
+            if (typeof val === 'object' && val !== null) {
+              ret[key] = deepCopy(val);
+            } else {
+              ret[key] = val;
+            }
+          }
+        }
+        return ret;
+      }
+      function shallowCopy(obj) {
+        var ret = {}, key;
+        for (key in obj) {
+          if (obj.hasOwnProperty(key)) {
+            ret[key] = obj[key];
+          }
+        }
+        return ret;
+      }
+      ignoreJSHintError(shallowCopy);
+      function upperBound(array, func) {
+        var diff, len, i, current;
+        len = array.length;
+        i = 0;
+        while (len) {
+          diff = len >>> 1;
+          current = i + diff;
+          if (func(array[current])) {
+            len = diff;
+          } else {
+            i = current + 1;
+            len -= diff + 1;
+          }
+        }
+        return i;
+      }
+      function lowerBound(array, func) {
+        var diff, len, i, current;
+        len = array.length;
+        i = 0;
+        while (len) {
+          diff = len >>> 1;
+          current = i + diff;
+          if (func(array[current])) {
+            i = current + 1;
+            len -= diff + 1;
+          } else {
+            len = diff;
+          }
+        }
+        return i;
+      }
+      ignoreJSHintError(lowerBound);
+      objectCreate = Object.create || function () {
+        function F() {
+        }
+        return function (o) {
+          F.prototype = o;
+          return new F;
+        };
+      }();
+      objectKeys = Object.keys || function (o) {
+        var keys = [], key;
+        for (key in o) {
+          keys.push(key);
+        }
+        return keys;
+      };
+      function extend(to, from) {
+        var keys = objectKeys(from), key, i, len;
+        for (i = 0, len = keys.length; i < len; i += 1) {
+          key = keys[i];
+          to[key] = from[key];
+        }
+        return to;
+      }
+      Syntax = {
+        AssignmentExpression: 'AssignmentExpression',
+        ArrayExpression: 'ArrayExpression',
+        ArrayPattern: 'ArrayPattern',
+        ArrowFunctionExpression: 'ArrowFunctionExpression',
+        AwaitExpression: 'AwaitExpression',
+        BlockStatement: 'BlockStatement',
+        BinaryExpression: 'BinaryExpression',
+        BreakStatement: 'BreakStatement',
+        CallExpression: 'CallExpression',
+        CatchClause: 'CatchClause',
+        ClassBody: 'ClassBody',
+        ClassDeclaration: 'ClassDeclaration',
+        ClassExpression: 'ClassExpression',
+        ComprehensionBlock: 'ComprehensionBlock',
+        ComprehensionExpression: 'ComprehensionExpression',
+        ConditionalExpression: 'ConditionalExpression',
+        ContinueStatement: 'ContinueStatement',
+        DebuggerStatement: 'DebuggerStatement',
+        DirectiveStatement: 'DirectiveStatement',
+        DoWhileStatement: 'DoWhileStatement',
+        EmptyStatement: 'EmptyStatement',
+        ExportBatchSpecifier: 'ExportBatchSpecifier',
+        ExportDeclaration: 'ExportDeclaration',
+        ExportSpecifier: 'ExportSpecifier',
+        ExpressionStatement: 'ExpressionStatement',
+        ForStatement: 'ForStatement',
+        ForInStatement: 'ForInStatement',
+        ForOfStatement: 'ForOfStatement',
+        FunctionDeclaration: 'FunctionDeclaration',
+        FunctionExpression: 'FunctionExpression',
+        GeneratorExpression: 'GeneratorExpression',
+        Identifier: 'Identifier',
+        IfStatement: 'IfStatement',
+        ImportDeclaration: 'ImportDeclaration',
+        ImportDefaultSpecifier: 'ImportDefaultSpecifier',
+        ImportNamespaceSpecifier: 'ImportNamespaceSpecifier',
+        ImportSpecifier: 'ImportSpecifier',
+        Literal: 'Literal',
+        LabeledStatement: 'LabeledStatement',
+        LogicalExpression: 'LogicalExpression',
+        MemberExpression: 'MemberExpression',
+        MethodDefinition: 'MethodDefinition',
+        ModuleSpecifier: 'ModuleSpecifier',
+        NewExpression: 'NewExpression',
+        ObjectExpression: 'ObjectExpression',
+        ObjectPattern: 'ObjectPattern',
+        Program: 'Program',
+        Property: 'Property',
+        ReturnStatement: 'ReturnStatement',
+        SequenceExpression: 'SequenceExpression',
+        SpreadElement: 'SpreadElement',
+        SwitchStatement: 'SwitchStatement',
+        SwitchCase: 'SwitchCase',
+        TaggedTemplateExpression: 'TaggedTemplateExpression',
+        TemplateElement: 'TemplateElement',
+        TemplateLiteral: 'TemplateLiteral',
+        ThisExpression: 'ThisExpression',
+        ThrowStatement: 'ThrowStatement',
+        TryStatement: 'TryStatement',
+        UnaryExpression: 'UnaryExpression',
+        UpdateExpression: 'UpdateExpression',
+        VariableDeclaration: 'VariableDeclaration',
+        VariableDeclarator: 'VariableDeclarator',
+        WhileStatement: 'WhileStatement',
+        WithStatement: 'WithStatement',
+        YieldExpression: 'YieldExpression'
+      };
+      VisitorKeys = {
+        AssignmentExpression: [
+          'left',
+          'right'
+        ],
+        ArrayExpression: ['elements'],
+        ArrayPattern: ['elements'],
+        ArrowFunctionExpression: [
+          'params',
+          'defaults',
+          'rest',
+          'body'
+        ],
+        AwaitExpression: ['argument'],
+        BlockStatement: ['body'],
+        BinaryExpression: [
+          'left',
+          'right'
+        ],
+        BreakStatement: ['label'],
+        CallExpression: [
+          'callee',
+          'arguments'
+        ],
+        CatchClause: [
+          'param',
+          'body'
+        ],
+        ClassBody: ['body'],
+        ClassDeclaration: [
+          'id',
+          'body',
+          'superClass'
+        ],
+        ClassExpression: [
+          'id',
+          'body',
+          'superClass'
+        ],
+        ComprehensionBlock: [
+          'left',
+          'right'
+        ],
+        ComprehensionExpression: [
+          'blocks',
+          'filter',
+          'body'
+        ],
+        ConditionalExpression: [
+          'test',
+          'consequent',
+          'alternate'
+        ],
+        ContinueStatement: ['label'],
+        DebuggerStatement: [],
+        DirectiveStatement: [],
+        DoWhileStatement: [
+          'body',
+          'test'
+        ],
+        EmptyStatement: [],
+        ExportBatchSpecifier: [],
+        ExportDeclaration: [
+          'declaration',
+          'specifiers',
+          'source'
+        ],
+        ExportSpecifier: [
+          'id',
+          'name'
+        ],
+        ExpressionStatement: ['expression'],
+        ForStatement: [
+          'init',
+          'test',
+          'update',
+          'body'
+        ],
+        ForInStatement: [
+          'left',
+          'right',
+          'body'
+        ],
+        ForOfStatement: [
+          'left',
+          'right',
+          'body'
+        ],
+        FunctionDeclaration: [
+          'id',
+          'params',
+          'defaults',
+          'rest',
+          'body'
+        ],
+        FunctionExpression: [
+          'id',
+          'params',
+          'defaults',
+          'rest',
+          'body'
+        ],
+        GeneratorExpression: [
+          'blocks',
+          'filter',
+          'body'
+        ],
+        Identifier: [],
+        IfStatement: [
+          'test',
+          'consequent',
+          'alternate'
+        ],
+        ImportDeclaration: [
+          'specifiers',
+          'source'
+        ],
+        ImportDefaultSpecifier: ['id'],
+        ImportNamespaceSpecifier: ['id'],
+        ImportSpecifier: [
+          'id',
+          'name'
+        ],
+        Literal: [],
+        LabeledStatement: [
+          'label',
+          'body'
+        ],
+        LogicalExpression: [
+          'left',
+          'right'
+        ],
+        MemberExpression: [
+          'object',
+          'property'
+        ],
+        MethodDefinition: [
+          'key',
+          'value'
+        ],
+        ModuleSpecifier: [],
+        NewExpression: [
+          'callee',
+          'arguments'
+        ],
+        ObjectExpression: ['properties'],
+        ObjectPattern: ['properties'],
+        Program: ['body'],
+        Property: [
+          'key',
+          'value'
+        ],
+        ReturnStatement: ['argument'],
+        SequenceExpression: ['expressions'],
+        SpreadElement: ['argument'],
+        SwitchStatement: [
+          'discriminant',
+          'cases'
+        ],
+        SwitchCase: [
+          'test',
+          'consequent'
+        ],
+        TaggedTemplateExpression: [
+          'tag',
+          'quasi'
+        ],
+        TemplateElement: [],
+        TemplateLiteral: [
+          'quasis',
+          'expressions'
+        ],
+        ThisExpression: [],
+        ThrowStatement: ['argument'],
+        TryStatement: [
+          'block',
+          'handlers',
+          'handler',
+          'guardedHandlers',
+          'finalizer'
+        ],
+        UnaryExpression: ['argument'],
+        UpdateExpression: ['argument'],
+        VariableDeclaration: ['declarations'],
+        VariableDeclarator: [
+          'id',
+          'init'
+        ],
+        WhileStatement: [
+          'test',
+          'body'
+        ],
+        WithStatement: [
+          'object',
+          'body'
+        ],
+        YieldExpression: ['argument']
+      };
+      BREAK = {};
+      SKIP = {};
+      REMOVE = {};
+      VisitorOption = {
+        Break: BREAK,
+        Skip: SKIP,
+        Remove: REMOVE
+      };
+      function Reference(parent, key) {
+        this.parent = parent;
+        this.key = key;
+      }
+      Reference.prototype.replace = function replace(node) {
+        this.parent[this.key] = node;
+      };
+      Reference.prototype.remove = function remove() {
+        if (isArray(this.parent)) {
+          this.parent.splice(this.key, 1);
+          return true;
+        } else {
+          this.replace(null);
+          return false;
+        }
+      };
+      function Element(node, path, wrap, ref) {
+        this.node = node;
+        this.path = path;
+        this.wrap = wrap;
+        this.ref = ref;
+      }
+      function Controller() {
+      }
+      Controller.prototype.path = function path() {
+        var i, iz, j, jz, result, element;
+        function addToPath(result, path) {
+          if (isArray(path)) {
+            for (j = 0, jz = path.length; j < jz; ++j) {
+              result.push(path[j]);
+            }
+          } else {
+            result.push(path);
+          }
+        }
+        if (!this.__current.path) {
+          return null;
+        }
+        result = [];
+        for (i = 2, iz = this.__leavelist.length; i < iz; ++i) {
+          element = this.__leavelist[i];
+          addToPath(result, element.path);
+        }
+        addToPath(result, this.__current.path);
+        return result;
+      };
+      Controller.prototype.type = function () {
+        var node = this.current();
+        return node.type || this.__current.wrap;
+      };
+      Controller.prototype.parents = function parents() {
+        var i, iz, result;
+        result = [];
+        for (i = 1, iz = this.__leavelist.length; i < iz; ++i) {
+          result.push(this.__leavelist[i].node);
+        }
+        return result;
+      };
+      Controller.prototype.current = function current() {
+        return this.__current.node;
+      };
+      Controller.prototype.__execute = function __execute(callback, element) {
+        var previous, result;
+        result = undefined;
+        previous = this.__current;
+        this.__current = element;
+        this.__state = null;
+        if (callback) {
+          result = callback.call(this, element.node, this.__leavelist[this.__leavelist.length - 1].node);
+        }
+        this.__current = previous;
+        return result;
+      };
+      Controller.prototype.notify = function notify(flag) {
+        this.__state = flag;
+      };
+      Controller.prototype.skip = function () {
+        this.notify(SKIP);
+      };
+      Controller.prototype['break'] = function () {
+        this.notify(BREAK);
+      };
+      Controller.prototype.remove = function () {
+        this.notify(REMOVE);
+      };
+      Controller.prototype.__initialize = function (root, visitor) {
+        this.visitor = visitor;
+        this.root = root;
+        this.__worklist = [];
+        this.__leavelist = [];
+        this.__current = null;
+        this.__state = null;
+        this.__fallback = visitor.fallback === 'iteration';
+        this.__keys = VisitorKeys;
+        if (visitor.keys) {
+          this.__keys = extend(objectCreate(this.__keys), visitor.keys);
+        }
+      };
+      function isNode(node) {
+        if (node == null) {
+          return false;
+        }
+        return typeof node === 'object' && typeof node.type === 'string';
+      }
+      function isProperty(nodeType, key) {
+        return (nodeType === Syntax.ObjectExpression || nodeType === Syntax.ObjectPattern) && 'properties' === key;
+      }
+      Controller.prototype.traverse = function traverse(root, visitor) {
+        var worklist, leavelist, element, node, nodeType, ret, key, current, current2, candidates, candidate, sentinel;
+        this.__initialize(root, visitor);
+        sentinel = {};
+        worklist = this.__worklist;
+        leavelist = this.__leavelist;
+        worklist.push(new Element(root, null, null, null));
+        leavelist.push(new Element(null, null, null, null));
+        while (worklist.length) {
+          element = worklist.pop();
+          if (element === sentinel) {
+            element = leavelist.pop();
+            ret = this.__execute(visitor.leave, element);
+            if (this.__state === BREAK || ret === BREAK) {
+              return;
+            }
+            continue;
+          }
+          if (element.node) {
+            ret = this.__execute(visitor.enter, element);
+            if (this.__state === BREAK || ret === BREAK) {
+              return;
+            }
+            worklist.push(sentinel);
+            leavelist.push(element);
+            if (this.__state === SKIP || ret === SKIP) {
+              continue;
+            }
+            node = element.node;
+            nodeType = element.wrap || node.type;
+            candidates = this.__keys[nodeType];
+            if (!candidates) {
+              if (this.__fallback) {
+                candidates = objectKeys(node);
+              } else {
+                throw new Error('Unknown node type ' + nodeType + '.');
+              }
+            }
+            current = candidates.length;
+            while ((current -= 1) >= 0) {
+              key = candidates[current];
+              candidate = node[key];
+              if (!candidate) {
+                continue;
+              }
+              if (isArray(candidate)) {
+                current2 = candidate.length;
+                while ((current2 -= 1) >= 0) {
+                  if (!candidate[current2]) {
+                    continue;
+                  }
+                  if (isProperty(nodeType, candidates[current])) {
+                    element = new Element(candidate[current2], [
+                      key,
+                      current2
+                    ], 'Property', null);
+                  } else if (isNode(candidate[current2])) {
+                    element = new Element(candidate[current2], [
+                      key,
+                      current2
+                    ], null, null);
+                  } else {
+                    continue;
+                  }
+                  worklist.push(element);
+                }
+              } else if (isNode(candidate)) {
+                worklist.push(new Element(candidate, key, null, null));
+              }
+            }
+          }
+        }
+      };
+      Controller.prototype.replace = function replace(root, visitor) {
+        function removeElem(element) {
+          var i, key, nextElem, parent;
+          if (element.ref.remove()) {
+            key = element.ref.key;
+            parent = element.ref.parent;
+            i = worklist.length;
+            while (i--) {
+              nextElem = worklist[i];
+              if (nextElem.ref && nextElem.ref.parent === parent) {
+                if (nextElem.ref.key < key) {
+                  break;
+                }
+                --nextElem.ref.key;
+              }
+            }
+          }
+        }
+        var worklist, leavelist, node, nodeType, target, element, current, current2, candidates, candidate, sentinel, outer, key;
+        this.__initialize(root, visitor);
+        sentinel = {};
+        worklist = this.__worklist;
+        leavelist = this.__leavelist;
+        outer = { root: root };
+        element = new Element(root, null, null, new Reference(outer, 'root'));
+        worklist.push(element);
+        leavelist.push(element);
+        while (worklist.length) {
+          element = worklist.pop();
+          if (element === sentinel) {
+            element = leavelist.pop();
+            target = this.__execute(visitor.leave, element);
+            if (target !== undefined && target !== BREAK && target !== SKIP && target !== REMOVE) {
+              element.ref.replace(target);
+            }
+            if (this.__state === REMOVE || target === REMOVE) {
+              removeElem(element);
+            }
+            if (this.__state === BREAK || target === BREAK) {
+              return outer.root;
+            }
+            continue;
+          }
+          target = this.__execute(visitor.enter, element);
+          if (target !== undefined && target !== BREAK && target !== SKIP && target !== REMOVE) {
+            element.ref.replace(target);
+            element.node = target;
+          }
+          if (this.__state === REMOVE || target === REMOVE) {
+            removeElem(element);
+            element.node = null;
+          }
+          if (this.__state === BREAK || target === BREAK) {
+            return outer.root;
+          }
+          node = element.node;
+          if (!node) {
+            continue;
+          }
+          worklist.push(sentinel);
+          leavelist.push(element);
+          if (this.__state === SKIP || target === SKIP) {
+            continue;
+          }
+          nodeType = element.wrap || node.type;
+          candidates = this.__keys[nodeType];
+          if (!candidates) {
+            if (this.__fallback) {
+              candidates = objectKeys(node);
+            } else {
+              throw new Error('Unknown node type ' + nodeType + '.');
+            }
+          }
+          current = candidates.length;
+          while ((current -= 1) >= 0) {
+            key = candidates[current];
+            candidate = node[key];
+            if (!candidate) {
+              continue;
+            }
+            if (isArray(candidate)) {
+              current2 = candidate.length;
+              while ((current2 -= 1) >= 0) {
+                if (!candidate[current2]) {
+                  continue;
+                }
+                if (isProperty(nodeType, candidates[current])) {
+                  element = new Element(candidate[current2], [
+                    key,
+                    current2
+                  ], 'Property', new Reference(candidate, current2));
+                } else if (isNode(candidate[current2])) {
+                  element = new Element(candidate[current2], [
+                    key,
+                    current2
+                  ], null, new Reference(candidate, current2));
+                } else {
+                  continue;
+                }
+                worklist.push(element);
+              }
+            } else if (isNode(candidate)) {
+              worklist.push(new Element(candidate, key, null, new Reference(node, key)));
+            }
+          }
+        }
+        return outer.root;
+      };
+      function traverse(root, visitor) {
+        var controller = new Controller;
+        return controller.traverse(root, visitor);
+      }
+      function replace(root, visitor) {
+        var controller = new Controller;
+        return controller.replace(root, visitor);
+      }
+      function extendCommentRange(comment, tokens) {
+        var target;
+        target = upperBound(tokens, function search(token) {
+          return token.range[0] > comment.range[0];
+        });
+        comment.extendedRange = [
+          comment.range[0],
+          comment.range[1]
+        ];
+        if (target !== tokens.length) {
+          comment.extendedRange[1] = tokens[target].range[0];
+        }
+        target -= 1;
+        if (target >= 0) {
+          comment.extendedRange[0] = tokens[target].range[1];
+        }
+        return comment;
+      }
+      function attachComments(tree, providedComments, tokens) {
+        var comments = [], comment, len, i, cursor;
+        if (!tree.range) {
+          throw new Error('attachComments needs range information');
+        }
+        if (!tokens.length) {
+          if (providedComments.length) {
+            for (i = 0, len = providedComments.length; i < len; i += 1) {
+              comment = deepCopy(providedComments[i]);
+              comment.extendedRange = [
+                0,
+                tree.range[0]
+              ];
+              comments.push(comment);
+            }
+            tree.leadingComments = comments;
+          }
+          return tree;
+        }
+        for (i = 0, len = providedComments.length; i < len; i += 1) {
+          comments.push(extendCommentRange(deepCopy(providedComments[i]), tokens));
+        }
+        cursor = 0;
+        traverse(tree, {
+          enter: function (node) {
+            var comment;
+            while (cursor < comments.length) {
+              comment = comments[cursor];
+              if (comment.extendedRange[1] > node.range[0]) {
+                break;
+              }
+              if (comment.extendedRange[1] === node.range[0]) {
+                if (!node.leadingComments) {
+                  node.leadingComments = [];
+                }
+                node.leadingComments.push(comment);
+                comments.splice(cursor, 1);
+              } else {
+                cursor += 1;
+              }
+            }
+            if (cursor === comments.length) {
+              return VisitorOption.Break;
+            }
+            if (comments[cursor].extendedRange[0] > node.range[1]) {
+              return VisitorOption.Skip;
+            }
+          }
+        });
+        cursor = 0;
+        traverse(tree, {
+          leave: function (node) {
+            var comment;
+            while (cursor < comments.length) {
+              comment = comments[cursor];
+              if (node.range[1] < comment.extendedRange[0]) {
+                break;
+              }
+              if (node.range[1] === comment.extendedRange[0]) {
+                if (!node.trailingComments) {
+                  node.trailingComments = [];
+                }
+                node.trailingComments.push(comment);
+                comments.splice(cursor, 1);
+              } else {
+                cursor += 1;
+              }
+            }
+            if (cursor === comments.length) {
+              return VisitorOption.Break;
+            }
+            if (comments[cursor].extendedRange[0] > node.range[1]) {
+              return VisitorOption.Skip;
+            }
+          }
+        });
+        return tree;
+      }
+      exports.version = '1.8.1-dev';
+      exports.Syntax = Syntax;
+      exports.traverse = traverse;
+      exports.replace = replace;
+      exports.attachComments = attachComments;
+      exports.VisitorKeys = VisitorKeys;
+      exports.VisitorOption = VisitorOption;
+      exports.Controller = Controller;
+      exports.cloneEnvironment = function () {
+        return clone({});
+      };
+      return exports;
+    }));
+  });
+  require('/tools/entry-point.js');
+}.call(this, this));
diff --git a/testlib/selenium/esprima.js b/testlib/selenium/esprima.js
new file mode 100644
index 000000000..d95f56eba
--- /dev/null
+++ b/testlib/selenium/esprima.js
@@ -0,0 +1,6605 @@
+(function webpackUniversalModuleDefinition(root, factory) {
+/* istanbul ignore next */
+	if(typeof exports === 'object' && typeof module === 'object')
+		module.exports = factory();
+	else if(typeof define === 'function' && define.amd)
+		define([], factory);
+/* istanbul ignore next */
+	else if(typeof exports === 'object')
+		exports["esprima"] = factory();
+	else
+		root["esprima"] = factory();
+})(this, function() {
+return /******/ (function(modules) { // webpackBootstrap
+/******/ 	// The module cache
+/******/ 	var installedModules = {};
+
+/******/ 	// The require function
+/******/ 	function __webpack_require__(moduleId) {
+
+/******/ 		// Check if module is in cache
+/* istanbul ignore if */
+/******/ 		if(installedModules[moduleId])
+/******/ 			return installedModules[moduleId].exports;
+
+/******/ 		// Create a new module (and put it into the cache)
+/******/ 		var module = installedModules[moduleId] = {
+/******/ 			exports: {},
+/******/ 			id: moduleId,
+/******/ 			loaded: false
+/******/ 		};
+
+/******/ 		// Execute the module function
+/******/ 		modules[moduleId].call(module.exports, module, module.exports, __webpack_require__);
+
+/******/ 		// Flag the module as loaded
+/******/ 		module.loaded = true;
+
+/******/ 		// Return the exports of the module
+/******/ 		return module.exports;
+/******/ 	}
+
+
+/******/ 	// expose the modules object (__webpack_modules__)
+/******/ 	__webpack_require__.m = modules;
+
+/******/ 	// expose the module cache
+/******/ 	__webpack_require__.c = installedModules;
+
+/******/ 	// __webpack_public_path__
+/******/ 	__webpack_require__.p = "";
+
+/******/ 	// Load entry module and return exports
+/******/ 	return __webpack_require__(0);
+/******/ })
+/************************************************************************/
+/******/ ([
+/* 0 */
+/***/ function(module, exports, __webpack_require__) {
+
+	/*
+	  Copyright JS Foundation and other contributors, https://js.foundation/
+
+	  Redistribution and use in source and binary forms, with or without
+	  modification, are permitted provided that the following conditions are met:
+
+	    * Redistributions of source code must retain the above copyright
+	      notice, this list of conditions and the following disclaimer.
+	    * Redistributions in binary form must reproduce the above copyright
+	      notice, this list of conditions and the following disclaimer in the
+	      documentation and/or other materials provided with the distribution.
+
+	  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+	  AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+	  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+	  ARE DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> BE LIABLE FOR ANY
+	  DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+	  (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+	  LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+	  ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+	  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+	  THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+	*/
+	"use strict";
+	var comment_handler_1 = __webpack_require__(1);
+	var parser_1 = __webpack_require__(3);
+	var jsx_parser_1 = __webpack_require__(11);
+	var tokenizer_1 = __webpack_require__(15);
+	function parse(code, options, delegate) {
+	    var commentHandler = null;
+	    var proxyDelegate = function (node, metadata) {
+	        if (delegate) {
+	            delegate(node, metadata);
+	        }
+	        if (commentHandler) {
+	            commentHandler.visit(node, metadata);
+	        }
+	    };
+	    var parserDelegate = (typeof delegate === 'function') ? proxyDelegate : null;
+	    var collectComment = false;
+	    if (options) {
+	        collectComment = (typeof options.comment === 'boolean' && options.comment);
+	        var attachComment = (typeof options.attachComment === 'boolean' && options.attachComment);
+	        if (collectComment || attachComment) {
+	            commentHandler = new comment_handler_1.CommentHandler();
+	            commentHandler.attach = attachComment;
+	            options.comment = true;
+	            parserDelegate = proxyDelegate;
+	        }
+	    }
+	    var isModule = false;
+	    if (options && typeof options.sourceType === 'string') {
+	        isModule = (options.sourceType === 'module');
+	    }
+	    var parser;
+	    if (options && typeof options.jsx === 'boolean' && options.jsx) {
+	        parser = new jsx_parser_1.JSXParser(code, options, parserDelegate);
+	    }
+	    else {
+	        parser = new parser_1.Parser(code, options, parserDelegate);
+	    }
+	    var program = isModule ? parser.parseModule() : parser.parseScript();
+	    var ast = (program);
+	    if (collectComment && commentHandler) {
+	        ast.comments = commentHandler.comments;
+	    }
+	    if (parser.config.tokens) {
+	        ast.tokens = parser.tokens;
+	    }
+	    if (parser.config.tolerant) {
+	        ast.errors = parser.errorHandler.errors;
+	    }
+	    return ast;
+	}
+	exports.parse = parse;
+	function parseModule(code, options, delegate) {
+	    var parsingOptions = options || {};
+	    parsingOptions.sourceType = 'module';
+	    return parse(code, parsingOptions, delegate);
+	}
+	exports.parseModule = parseModule;
+	function parseScript(code, options, delegate) {
+	    var parsingOptions = options || {};
+	    parsingOptions.sourceType = 'script';
+	    return parse(code, parsingOptions, delegate);
+	}
+	exports.parseScript = parseScript;
+	function tokenize(code, options, delegate) {
+	    var tokenizer = new tokenizer_1.Tokenizer(code, options);
+	    var tokens;
+	    tokens = [];
+	    try {
+	        while (true) {
+	            var token = tokenizer.getNextToken();
+	            if (!token) {
+	                break;
+	            }
+	            if (delegate) {
+	                token = delegate(token);
+	            }
+	            tokens.push(token);
+	        }
+	    }
+	    catch (e) {
+	        tokenizer.errorHandler.tolerate(e);
+	    }
+	    if (tokenizer.errorHandler.tolerant) {
+	        tokens.errors = tokenizer.errors();
+	    }
+	    return tokens;
+	}
+	exports.tokenize = tokenize;
+	var syntax_1 = __webpack_require__(2);
+	exports.Syntax = syntax_1.Syntax;
+	// Sync with *.json manifests.
+	exports.version = '4.0.0-dev';
+
+
+/***/ },
+/* 1 */
+/***/ function(module, exports, __webpack_require__) {
+
+	"use strict";
+	var syntax_1 = __webpack_require__(2);
+	var CommentHandler = (function () {
+	    function CommentHandler() {
+	        this.attach = false;
+	        this.comments = [];
+	        this.stack = [];
+	        this.leading = [];
+	        this.trailing = [];
+	    }
+	    CommentHandler.prototype.insertInnerComments = function (node, metadata) {
+	        //  innnerComments for properties empty block
+	        //  `function a() {/** comments **\/}`
+	        if (node.type === syntax_1.Syntax.BlockStatement && node.body.length === 0) {
+	            var innerComments = [];
+	            for (var i = this.leading.length - 1; i >= 0; --i) {
+	                var entry = this.leading[i];
+	                if (metadata.end.offset >= entry.start) {
+	                    innerComments.unshift(entry.comment);
+	                    this.leading.splice(i, 1);
+	                    this.trailing.splice(i, 1);
+	                }
+	            }
+	            if (innerComments.length) {
+	                node.innerComments = innerComments;
+	            }
+	        }
+	    };
+	    CommentHandler.prototype.findTrailingComments = function (metadata) {
+	        var trailingComments = [];
+	        if (this.trailing.length > 0) {
+	            for (var i = this.trailing.length - 1; i >= 0; --i) {
+	                var entry_1 = this.trailing[i];
+	                if (entry_1.start >= metadata.end.offset) {
+	                    trailingComments.unshift(entry_1.comment);
+	                }
+	            }
+	            this.trailing.length = 0;
+	            return trailingComments;
+	        }
+	        var entry = this.stack[this.stack.length - 1];
+	        if (entry && entry.node.trailingComments) {
+	            var firstComment = entry.node.trailingComments[0];
+	            if (firstComment && firstComment.range[0] >= metadata.end.offset) {
+	                trailingComments = entry.node.trailingComments;
+	                delete entry.node.trailingComments;
+	            }
+	        }
+	        return trailingComments;
+	    };
+	    CommentHandler.prototype.findLeadingComments = function (metadata) {
+	        var leadingComments = [];
+	        var target;
+	        while (this.stack.length > 0) {
+	            var entry = this.stack[this.stack.length - 1];
+	            if (entry && entry.start >= metadata.start.offset) {
+	                target = entry.node;
+	                this.stack.pop();
+	            }
+	            else {
+	                break;
+	            }
+	        }
+	        if (target) {
+	            var count = target.leadingComments ? target.leadingComments.length : 0;
+	            for (var i = count - 1; i >= 0; --i) {
+	                var comment = target.leadingComments[i];
+	                if (comment.range[1] <= metadata.start.offset) {
+	                    leadingComments.unshift(comment);
+	                    target.leadingComments.splice(i, 1);
+	                }
+	            }
+	            if (target.leadingComments && target.leadingComments.length === 0) {
+	                delete target.leadingComments;
+	            }
+	            return leadingComments;
+	        }
+	        for (var i = this.leading.length - 1; i >= 0; --i) {
+	            var entry = this.leading[i];
+	            if (entry.start <= metadata.start.offset) {
+	                leadingComments.unshift(entry.comment);
+	                this.leading.splice(i, 1);
+	            }
+	        }
+	        return leadingComments;
+	    };
+	    CommentHandler.prototype.visitNode = function (node, metadata) {
+	        if (node.type === syntax_1.Syntax.Program && node.body.length > 0) {
+	            return;
+	        }
+	        this.insertInnerComments(node, metadata);
+	        var trailingComments = this.findTrailingComments(metadata);
+	        var leadingComments = this.findLeadingComments(metadata);
+	        if (leadingComments.length > 0) {
+	            node.leadingComments = leadingComments;
+	        }
+	        if (trailingComments.length > 0) {
+	            node.trailingComments = trailingComments;
+	        }
+	        this.stack.push({
+	            node: node,
+	            start: metadata.start.offset
+	        });
+	    };
+	    CommentHandler.prototype.visitComment = function (node, metadata) {
+	        var type = (node.type[0] === 'L') ? 'Line' : 'Block';
+	        var comment = {
+	            type: type,
+	            value: node.value
+	        };
+	        if (node.range) {
+	            comment.range = node.range;
+	        }
+	        if (node.loc) {
+	            comment.loc = node.loc;
+	        }
+	        this.comments.push(comment);
+	        if (this.attach) {
+	            var entry = {
+	                comment: {
+	                    type: type,
+	                    value: node.value,
+	                    range: [metadata.start.offset, metadata.end.offset]
+	                },
+	                start: metadata.start.offset
+	            };
+	            if (node.loc) {
+	                entry.comment.loc = node.loc;
+	            }
+	            node.type = type;
+	            this.leading.push(entry);
+	            this.trailing.push(entry);
+	        }
+	    };
+	    CommentHandler.prototype.visit = function (node, metadata) {
+	        if (node.type === 'LineComment') {
+	            this.visitComment(node, metadata);
+	        }
+	        else if (node.type === 'BlockComment') {
+	            this.visitComment(node, metadata);
+	        }
+	        else if (this.attach) {
+	            this.visitNode(node, metadata);
+	        }
+	    };
+	    return CommentHandler;
+	}());
+	exports.CommentHandler = CommentHandler;
+
+
+/***/ },
+/* 2 */
+/***/ function(module, exports) {
+
+	"use strict";
+	exports.Syntax = {
+	    AssignmentExpression: 'AssignmentExpression',
+	    AssignmentPattern: 'AssignmentPattern',
+	    ArrayExpression: 'ArrayExpression',
+	    ArrayPattern: 'ArrayPattern',
+	    ArrowFunctionExpression: 'ArrowFunctionExpression',
+	    AwaitExpression: 'AwaitExpression',
+	    BlockStatement: 'BlockStatement',
+	    BinaryExpression: 'BinaryExpression',
+	    BreakStatement: 'BreakStatement',
+	    CallExpression: 'CallExpression',
+	    CatchClause: 'CatchClause',
+	    ClassBody: 'ClassBody',
+	    ClassDeclaration: 'ClassDeclaration',
+	    ClassExpression: 'ClassExpression',
+	    ConditionalExpression: 'ConditionalExpression',
+	    ContinueStatement: 'ContinueStatement',
+	    DoWhileStatement: 'DoWhileStatement',
+	    DebuggerStatement: 'DebuggerStatement',
+	    EmptyStatement: 'EmptyStatement',
+	    ExportAllDeclaration: 'ExportAllDeclaration',
+	    ExportDefaultDeclaration: 'ExportDefaultDeclaration',
+	    ExportNamedDeclaration: 'ExportNamedDeclaration',
+	    ExportSpecifier: 'ExportSpecifier',
+	    ExpressionStatement: 'ExpressionStatement',
+	    ForStatement: 'ForStatement',
+	    ForOfStatement: 'ForOfStatement',
+	    ForInStatement: 'ForInStatement',
+	    FunctionDeclaration: 'FunctionDeclaration',
+	    FunctionExpression: 'FunctionExpression',
+	    Identifier: 'Identifier',
+	    IfStatement: 'IfStatement',
+	    ImportDeclaration: 'ImportDeclaration',
+	    ImportDefaultSpecifier: 'ImportDefaultSpecifier',
+	    ImportNamespaceSpecifier: 'ImportNamespaceSpecifier',
+	    ImportSpecifier: 'ImportSpecifier',
+	    Literal: 'Literal',
+	    LabeledStatement: 'LabeledStatement',
+	    LogicalExpression: 'LogicalExpression',
+	    MemberExpression: 'MemberExpression',
+	    MetaProperty: 'MetaProperty',
+	    MethodDefinition: 'MethodDefinition',
+	    NewExpression: 'NewExpression',
+	    ObjectExpression: 'ObjectExpression',
+	    ObjectPattern: 'ObjectPattern',
+	    Program: 'Program',
+	    Property: 'Property',
+	    RestElement: 'RestElement',
+	    ReturnStatement: 'ReturnStatement',
+	    SequenceExpression: 'SequenceExpression',
+	    SpreadElement: 'SpreadElement',
+	    Super: 'Super',
+	    SwitchCase: 'SwitchCase',
+	    SwitchStatement: 'SwitchStatement',
+	    TaggedTemplateExpression: 'TaggedTemplateExpression',
+	    TemplateElement: 'TemplateElement',
+	    TemplateLiteral: 'TemplateLiteral',
+	    ThisExpression: 'ThisExpression',
+	    ThrowStatement: 'ThrowStatement',
+	    TryStatement: 'TryStatement',
+	    UnaryExpression: 'UnaryExpression',
+	    UpdateExpression: 'UpdateExpression',
+	    VariableDeclaration: 'VariableDeclaration',
+	    VariableDeclarator: 'VariableDeclarator',
+	    WhileStatement: 'WhileStatement',
+	    WithStatement: 'WithStatement',
+	    YieldExpression: 'YieldExpression'
+	};
+
+
+/***/ },
+/* 3 */
+/***/ function(module, exports, __webpack_require__) {
+
+	"use strict";
+	var assert_1 = __webpack_require__(4);
+	var messages_1 = __webpack_require__(5);
+	var error_handler_1 = __webpack_require__(6);
+	var token_1 = __webpack_require__(7);
+	var scanner_1 = __webpack_require__(8);
+	var syntax_1 = __webpack_require__(2);
+	var Node = __webpack_require__(10);
+	var ArrowParameterPlaceHolder = 'ArrowParameterPlaceHolder';
+	var Parser = (function () {
+	    function Parser(code, options, delegate) {
+	        if (options === void 0) { options = {}; }
+	        this.config = {
+	            range: (typeof options.range === 'boolean') && options.range,
+	            loc: (typeof options.loc === 'boolean') && options.loc,
+	            source: null,
+	            tokens: (typeof options.tokens === 'boolean') && options.tokens,
+	            comment: (typeof options.comment === 'boolean') && options.comment,
+	            tolerant: (typeof options.tolerant === 'boolean') && options.tolerant
+	        };
+	        if (this.config.loc && options.source && options.source !== null) {
+	            this.config.source = String(options.source);
+	        }
+	        this.delegate = delegate;
+	        this.errorHandler = new error_handler_1.ErrorHandler();
+	        this.errorHandler.tolerant = this.config.tolerant;
+	        this.scanner = new scanner_1.Scanner(code, this.errorHandler);
+	        this.scanner.trackComment = this.config.comment;
+	        this.operatorPrecedence = {
+	            ')': 0,
+	            ';': 0,
+	            ',': 0,
+	            '=': 0,
+	            ']': 0,
+	            '||': 1,
+	            '&&': 2,
+	            '|': 3,
+	            '^': 4,
+	            '&': 5,
+	            '==': 6,
+	            '!=': 6,
+	            '===': 6,
+	            '!==': 6,
+	            '<': 7,
+	            '>': 7,
+	            '<=': 7,
+	            '>=': 7,
+	            '<<': 8,
+	            '>>': 8,
+	            '>>>': 8,
+	            '+': 9,
+	            '-': 9,
+	            '*': 11,
+	            '/': 11,
+	            '%': 11
+	        };
+	        this.lookahead = null;
+	        this.hasLineTerminator = false;
+	        this.context = {
+	            isModule: false,
+	            await: false,
+	            allowIn: true,
+	            allowYield: true,
+	            firstCoverInitializedNameError: null,
+	            isAssignmentTarget: false,
+	            isBindingElement: false,
+	            inFunctionBody: false,
+	            inIteration: false,
+	            inSwitch: false,
+	            labelSet: {},
+	            strict: false
+	        };
+	        this.tokens = [];
+	        this.startMarker = {
+	            index: 0,
+	            lineNumber: this.scanner.lineNumber,
+	            lineStart: 0
+	        };
+	        this.lastMarker = {
+	            index: 0,
+	            lineNumber: this.scanner.lineNumber,
+	            lineStart: 0
+	        };
+	        this.nextToken();
+	        this.lastMarker = {
+	            index: this.scanner.index,
+	            lineNumber: this.scanner.lineNumber,
+	            lineStart: this.scanner.lineStart
+	        };
+	    }
+	    Parser.prototype.throwError = function (messageFormat) {
+	        var values = [];
+	        for (var _i = 1; _i < arguments.length; _i++) {
+	            values[_i - 1] = arguments[_i];
+	        }
+	        var args = Array.prototype.slice.call(arguments, 1);
+	        var msg = messageFormat.replace(/%(\d)/g, function (whole, idx) {
+	            assert_1.assert(idx < args.length, 'Message reference must be in range');
+	            return args[idx];
+	        });
+	        var index = this.lastMarker.index;
+	        var line = this.lastMarker.lineNumber;
+	        var column = this.lastMarker.index - this.lastMarker.lineStart + 1;
+	        throw this.errorHandler.createError(index, line, column, msg);
+	    };
+	    Parser.prototype.tolerateError = function (messageFormat) {
+	        var values = [];
+	        for (var _i = 1; _i < arguments.length; _i++) {
+	            values[_i - 1] = arguments[_i];
+	        }
+	        var args = Array.prototype.slice.call(arguments, 1);
+	        var msg = messageFormat.replace(/%(\d)/g, function (whole, idx) {
+	            assert_1.assert(idx < args.length, 'Message reference must be in range');
+	            return args[idx];
+	        });
+	        var index = this.lastMarker.index;
+	        var line = this.scanner.lineNumber;
+	        var column = this.lastMarker.index - this.lastMarker.lineStart + 1;
+	        this.errorHandler.tolerateError(index, line, column, msg);
+	    };
+	    // Throw an exception because of the token.
+	    Parser.prototype.unexpectedTokenError = function (token, message) {
+	        var msg = message || messages_1.Messages.UnexpectedToken;
+	        var value;
+	        if (token) {
+	            if (!message) {
+	                msg = (token.type === token_1.Token.EOF) ? messages_1.Messages.UnexpectedEOS :
+	                    (token.type === token_1.Token.Identifier) ? messages_1.Messages.UnexpectedIdentifier :
+	                        (token.type === token_1.Token.NumericLiteral) ? messages_1.Messages.UnexpectedNumber :
+	                            (token.type === token_1.Token.StringLiteral) ? messages_1.Messages.UnexpectedString :
+	                                (token.type === token_1.Token.Template) ? messages_1.Messages.UnexpectedTemplate :
+	                                    messages_1.Messages.UnexpectedToken;
+	                if (token.type === token_1.Token.Keyword) {
+	                    if (this.scanner.isFutureReservedWord(token.value)) {
+	                        msg = messages_1.Messages.UnexpectedReserved;
+	                    }
+	                    else if (this.context.strict && this.scanner.isStrictModeReservedWord(token.value)) {
+	                        msg = messages_1.Messages.StrictReservedWord;
+	                    }
+	                }
+	            }
+	            value = (token.type === token_1.Token.Template) ? token.value.raw : token.value;
+	        }
+	        else {
+	            value = 'ILLEGAL';
+	        }
+	        msg = msg.replace('%0', value);
+	        if (token && typeof token.lineNumber === 'number') {
+	            var index = token.start;
+	            var line = token.lineNumber;
+	            var column = token.start - this.lastMarker.lineStart + 1;
+	            return this.errorHandler.createError(index, line, column, msg);
+	        }
+	        else {
+	            var index = this.lastMarker.index;
+	            var line = this.lastMarker.lineNumber;
+	            var column = index - this.lastMarker.lineStart + 1;
+	            return this.errorHandler.createError(index, line, column, msg);
+	        }
+	    };
+	    Parser.prototype.throwUnexpectedToken = function (token, message) {
+	        throw this.unexpectedTokenError(token, message);
+	    };
+	    Parser.prototype.tolerateUnexpectedToken = function (token, message) {
+	        this.errorHandler.tolerate(this.unexpectedTokenError(token, message));
+	    };
+	    Parser.prototype.collectComments = function () {
+	        if (!this.config.comment) {
+	            this.scanner.scanComments();
+	        }
+	        else {
+	            var comments = this.scanner.scanComments();
+	            if (comments.length > 0 && this.delegate) {
+	                for (var i = 0; i < comments.length; ++i) {
+	                    var e = comments[i];
+	                    var node = void 0;
+	                    node = {
+	                        type: e.multiLine ? 'BlockComment' : 'LineComment',
+	                        value: this.scanner.source.slice(e.slice[0], e.slice[1])
+	                    };
+	                    if (this.config.range) {
+	                        node.range = e.range;
+	                    }
+	                    if (this.config.loc) {
+	                        node.loc = e.loc;
+	                    }
+	                    var metadata = {
+	                        start: {
+	                            line: e.loc.start.line,
+	                            column: e.loc.start.column,
+	                            offset: e.range[0]
+	                        },
+	                        end: {
+	                            line: e.loc.end.line,
+	                            column: e.loc.end.column,
+	                            offset: e.range[1]
+	                        }
+	                    };
+	                    this.delegate(node, metadata);
+	                }
+	            }
+	        }
+	    };
+	    // From internal representation to an external structure
+	    Parser.prototype.getTokenRaw = function (token) {
+	        return this.scanner.source.slice(token.start, token.end);
+	    };
+	    Parser.prototype.convertToken = function (token) {
+	        var t;
+	        t = {
+	            type: token_1.TokenName[token.type],
+	            value: this.getTokenRaw(token)
+	        };
+	        if (this.config.range) {
+	            t.range = [token.start, token.end];
+	        }
+	        if (this.config.loc) {
+	            t.loc = {
+	                start: {
+	                    line: this.startMarker.lineNumber,
+	                    column: this.startMarker.index - this.startMarker.lineStart
+	                },
+	                end: {
+	                    line: this.scanner.lineNumber,
+	                    column: this.scanner.index - this.scanner.lineStart
+	                }
+	            };
+	        }
+	        if (token.regex) {
+	            t.regex = token.regex;
+	        }
+	        return t;
+	    };
+	    Parser.prototype.nextToken = function () {
+	        var token = this.lookahead;
+	        this.lastMarker.index = this.scanner.index;
+	        this.lastMarker.lineNumber = this.scanner.lineNumber;
+	        this.lastMarker.lineStart = this.scanner.lineStart;
+	        this.collectComments();
+	        this.startMarker.index = this.scanner.index;
+	        this.startMarker.lineNumber = this.scanner.lineNumber;
+	        this.startMarker.lineStart = this.scanner.lineStart;
+	        var next;
+	        next = this.scanner.lex();
+	        this.hasLineTerminator = (token && next) ? (token.lineNumber !== next.lineNumber) : false;
+	        if (next && this.context.strict && next.type === token_1.Token.Identifier) {
+	            if (this.scanner.isStrictModeReservedWord(next.value)) {
+	                next.type = token_1.Token.Keyword;
+	            }
+	        }
+	        this.lookahead = next;
+	        if (this.config.tokens && next.type !== token_1.Token.EOF) {
+	            this.tokens.push(this.convertToken(next));
+	        }
+	        return token;
+	    };
+	    Parser.prototype.nextRegexToken = function () {
+	        this.collectComments();
+	        var token = this.scanner.scanRegExp();
+	        if (this.config.tokens) {
+	            // Pop the previous token, '/' or '/='
+	            // This is added from the lookahead token.
+	            this.tokens.pop();
+	            this.tokens.push(this.convertToken(token));
+	        }
+	        // Prime the next lookahead.
+	        this.lookahead = token;
+	        this.nextToken();
+	        return token;
+	    };
+	    Parser.prototype.createNode = function () {
+	        return {
+	            index: this.startMarker.index,
+	            line: this.startMarker.lineNumber,
+	            column: this.startMarker.index - this.startMarker.lineStart
+	        };
+	    };
+	    Parser.prototype.startNode = function (token) {
+	        return {
+	            index: token.start,
+	            line: token.lineNumber,
+	            column: token.start - token.lineStart
+	        };
+	    };
+	    Parser.prototype.finalize = function (meta, node) {
+	        if (this.config.range) {
+	            node.range = [meta.index, this.lastMarker.index];
+	        }
+	        if (this.config.loc) {
+	            node.loc = {
+	                start: {
+	                    line: meta.line,
+	                    column: meta.column
+	                },
+	                end: {
+	                    line: this.lastMarker.lineNumber,
+	                    column: this.lastMarker.index - this.lastMarker.lineStart
+	                }
+	            };
+	            if (this.config.source) {
+	                node.loc.source = this.config.source;
+	            }
+	        }
+	        if (this.delegate) {
+	            var metadata = {
+	                start: {
+	                    line: meta.line,
+	                    column: meta.column,
+	                    offset: meta.index
+	                },
+	                end: {
+	                    line: this.lastMarker.lineNumber,
+	                    column: this.lastMarker.index - this.lastMarker.lineStart,
+	                    offset: this.lastMarker.index
+	                }
+	            };
+	            this.delegate(node, metadata);
+	        }
+	        return node;
+	    };
+	    // Expect the next token to match the specified punctuator.
+	    // If not, an exception will be thrown.
+	    Parser.prototype.expect = function (value) {
+	        var token = this.nextToken();
+	        if (token.type !== token_1.Token.Punctuator || token.value !== value) {
+	            this.throwUnexpectedToken(token);
+	        }
+	    };
+	    // Quietly expect a comma when in tolerant mode, otherwise delegates to expect().
+	    Parser.prototype.expectCommaSeparator = function () {
+	        if (this.config.tolerant) {
+	            var token = this.lookahead;
+	            if (token.type === token_1.Token.Punctuator && token.value === ',') {
+	                this.nextToken();
+	            }
+	            else if (token.type === token_1.Token.Punctuator && token.value === ';') {
+	                this.nextToken();
+	                this.tolerateUnexpectedToken(token);
+	            }
+	            else {
+	                this.tolerateUnexpectedToken(token, messages_1.Messages.UnexpectedToken);
+	            }
+	        }
+	        else {
+	            this.expect(',');
+	        }
+	    };
+	    // Expect the next token to match the specified keyword.
+	    // If not, an exception will be thrown.
+	    Parser.prototype.expectKeyword = function (keyword) {
+	        var token = this.nextToken();
+	        if (token.type !== token_1.Token.Keyword || token.value !== keyword) {
+	            this.throwUnexpectedToken(token);
+	        }
+	    };
+	    // Return true if the next token matches the specified punctuator.
+	    Parser.prototype.match = function (value) {
+	        return this.lookahead.type === token_1.Token.Punctuator && this.lookahead.value === value;
+	    };
+	    // Return true if the next token matches the specified keyword
+	    Parser.prototype.matchKeyword = function (keyword) {
+	        return this.lookahead.type === token_1.Token.Keyword && this.lookahead.value === keyword;
+	    };
+	    // Return true if the next token matches the specified contextual keyword
+	    // (where an identifier is sometimes a keyword depending on the context)
+	    Parser.prototype.matchContextualKeyword = function (keyword) {
+	        return this.lookahead.type === token_1.Token.Identifier && this.lookahead.value === keyword;
+	    };
+	    // Return true if the next token is an assignment operator
+	    Parser.prototype.matchAssign = function () {
+	        if (this.lookahead.type !== token_1.Token.Punctuator) {
+	            return false;
+	        }
+	        var op = this.lookahead.value;
+	        return op === '=' ||
+	            op === '*=' ||
+	            op === '**=' ||
+	            op === '/=' ||
+	            op === '%=' ||
+	            op === '+=' ||
+	            op === '-=' ||
+	            op === '<<=' ||
+	            op === '>>=' ||
+	            op === '>>>=' ||
+	            op === '&=' ||
+	            op === '^=' ||
+	            op === '|=';
+	    };
+	    // Cover grammar support.
+	    //
+	    // When an assignment expression position starts with an left parenthesis, the determination of the type
+	    // of the syntax is to be deferred arbitrarily long until the end of the parentheses pair (plus a lookahead)
+	    // or the first comma. This situation also defers the determination of all the expressions nested in the pair.
+	    //
+	    // There are three productions that can be parsed in a parentheses pair that needs to be determined
+	    // after the outermost pair is closed. They are:
+	    //
+	    //   1. AssignmentExpression
+	    //   2. BindingElements
+	    //   3. AssignmentTargets
+	    //
+	    // In order to avoid exponential backtracking, we use two flags to denote if the production can be
+	    // binding element or assignment target.
+	    //
+	    // The three productions have the relationship:
+	    //
+	    //   BindingElements ⊆ AssignmentTargets ⊆ AssignmentExpression
+	    //
+	    // with a single exception that CoverInitializedName when used directly in an Expression, generates
+	    // an early error. Therefore, we need the third state, firstCoverInitializedNameError, to track the
+	    // first usage of CoverInitializedName and report it when we reached the end of the parentheses pair.
+	    //
+	    // isolateCoverGrammar function runs the given parser function with a new cover grammar context, and it does not
+	    // effect the current flags. This means the production the parser parses is only used as an expression. Therefore
+	    // the CoverInitializedName check is conducted.
+	    //
+	    // inheritCoverGrammar function runs the given parse function with a new cover grammar context, and it propagates
+	    // the flags outside of the parser. This means the production the parser parses is used as a part of a potential
+	    // pattern. The CoverInitializedName check is deferred.
+	    Parser.prototype.isolateCoverGrammar = function (parseFunction) {
+	        var previousIsBindingElement = this.context.isBindingElement;
+	        var previousIsAssignmentTarget = this.context.isAssignmentTarget;
+	        var previousFirstCoverInitializedNameError = this.context.firstCoverInitializedNameError;
+	        this.context.isBindingElement = true;
+	        this.context.isAssignmentTarget = true;
+	        this.context.firstCoverInitializedNameError = null;
+	        var result = parseFunction.call(this);
+	        if (this.context.firstCoverInitializedNameError !== null) {
+	            this.throwUnexpectedToken(this.context.firstCoverInitializedNameError);
+	        }
+	        this.context.isBindingElement = previousIsBindingElement;
+	        this.context.isAssignmentTarget = previousIsAssignmentTarget;
+	        this.context.firstCoverInitializedNameError = previousFirstCoverInitializedNameError;
+	        return result;
+	    };
+	    Parser.prototype.inheritCoverGrammar = function (parseFunction) {
+	        var previousIsBindingElement = this.context.isBindingElement;
+	        var previousIsAssignmentTarget = this.context.isAssignmentTarget;
+	        var previousFirstCoverInitializedNameError = this.context.firstCoverInitializedNameError;
+	        this.context.isBindingElement = true;
+	        this.context.isAssignmentTarget = true;
+	        this.context.firstCoverInitializedNameError = null;
+	        var result = parseFunction.call(this);
+	        this.context.isBindingElement = this.context.isBindingElement && previousIsBindingElement;
+	        this.context.isAssignmentTarget = this.context.isAssignmentTarget && previousIsAssignmentTarget;
+	        this.context.firstCoverInitializedNameError = previousFirstCoverInitializedNameError || this.context.firstCoverInitializedNameError;
+	        return result;
+	    };
+	    Parser.prototype.consumeSemicolon = function () {
+	        if (this.match(';')) {
+	            this.nextToken();
+	        }
+	        else if (!this.hasLineTerminator) {
+	            if (this.lookahead.type !== token_1.Token.EOF && !this.match('}')) {
+	                this.throwUnexpectedToken(this.lookahead);
+	            }
+	            this.lastMarker.index = this.startMarker.index;
+	            this.lastMarker.lineNumber = this.startMarker.lineNumber;
+	            this.lastMarker.lineStart = this.startMarker.lineStart;
+	        }
+	    };
+	    // ECMA-262 12.2 Primary Expressions
+	    Parser.prototype.parsePrimaryExpression = function () {
+	        var node = this.createNode();
+	        var expr;
+	        var value, token, raw;
+	        switch (this.lookahead.type) {
+	            case token_1.Token.Identifier:
+	                if ((this.context.isModule || this.context.await) && this.lookahead.value === 'await') {
+	                    this.tolerateUnexpectedToken(this.lookahead);
+	                }
+	                expr = this.matchAsyncFunction() ? this.parseFunctionExpression() : this.finalize(node, new Node.Identifier(this.nextToken().value));
+	                break;
+	            case token_1.Token.NumericLiteral:
+	            case token_1.Token.StringLiteral:
+	                if (this.context.strict && this.lookahead.octal) {
+	                    this.tolerateUnexpectedToken(this.lookahead, messages_1.Messages.StrictOctalLiteral);
+	                }
+	                this.context.isAssignmentTarget = false;
+	                this.context.isBindingElement = false;
+	                token = this.nextToken();
+	                raw = this.getTokenRaw(token);
+	                expr = this.finalize(node, new Node.Literal(token.value, raw));
+	                break;
+	            case token_1.Token.BooleanLiteral:
+	                this.context.isAssignmentTarget = false;
+	                this.context.isBindingElement = false;
+	                token = this.nextToken();
+	                token.value = (token.value === 'true');
+	                raw = this.getTokenRaw(token);
+	                expr = this.finalize(node, new Node.Literal(token.value, raw));
+	                break;
+	            case token_1.Token.NullLiteral:
+	                this.context.isAssignmentTarget = false;
+	                this.context.isBindingElement = false;
+	                token = this.nextToken();
+	                token.value = null;
+	                raw = this.getTokenRaw(token);
+	                expr = this.finalize(node, new Node.Literal(token.value, raw));
+	                break;
+	            case token_1.Token.Template:
+	                expr = this.parseTemplateLiteral();
+	                break;
+	            case token_1.Token.Punctuator:
+	                value = this.lookahead.value;
+	                switch (value) {
+	                    case '(':
+	                        this.context.isBindingElement = false;
+	                        expr = this.inheritCoverGrammar(this.parseGroupExpression);
+	                        break;
+	                    case '[':
+	                        expr = this.inheritCoverGrammar(this.parseArrayInitializer);
+	                        break;
+	                    case '{':
+	                        expr = this.inheritCoverGrammar(this.parseObjectInitializer);
+	                        break;
+	                    case '/':
+	                    case '/=':
+	                        this.context.isAssignmentTarget = false;
+	                        this.context.isBindingElement = false;
+	                        this.scanner.index = this.startMarker.index;
+	                        token = this.nextRegexToken();
+	                        raw = this.getTokenRaw(token);
+	                        expr = this.finalize(node, new Node.RegexLiteral(token.value, raw, token.regex));
+	                        break;
+	                    default:
+	                        expr = this.throwUnexpectedToken(this.nextToken());
+	                }
+	                break;
+	            case token_1.Token.Keyword:
+	                if (!this.context.strict && this.context.allowYield && this.matchKeyword('yield')) {
+	                    expr = this.parseIdentifierName();
+	                }
+	                else if (!this.context.strict && this.matchKeyword('let')) {
+	                    expr = this.finalize(node, new Node.Identifier(this.nextToken().value));
+	                }
+	                else {
+	                    this.context.isAssignmentTarget = false;
+	                    this.context.isBindingElement = false;
+	                    if (this.matchKeyword('function')) {
+	                        expr = this.parseFunctionExpression();
+	                    }
+	                    else if (this.matchKeyword('this')) {
+	                        this.nextToken();
+	                        expr = this.finalize(node, new Node.ThisExpression());
+	                    }
+	                    else if (this.matchKeyword('class')) {
+	                        expr = this.parseClassExpression();
+	                    }
+	                    else {
+	                        expr = this.throwUnexpectedToken(this.nextToken());
+	                    }
+	                }
+	                break;
+	            default:
+	                expr = this.throwUnexpectedToken(this.nextToken());
+	        }
+	        return expr;
+	    };
+	    // ECMA-262 12.2.5 Array Initializer
+	    Parser.prototype.parseSpreadElement = function () {
+	        var node = this.createNode();
+	        this.expect('...');
+	        var arg = this.inheritCoverGrammar(this.parseAssignmentExpression);
+	        return this.finalize(node, new Node.SpreadElement(arg));
+	    };
+	    Parser.prototype.parseArrayInitializer = function () {
+	        var node = this.createNode();
+	        var elements = [];
+	        this.expect('[');
+	        while (!this.match(']')) {
+	            if (this.match(',')) {
+	                this.nextToken();
+	                elements.push(null);
+	            }
+	            else if (this.match('...')) {
+	                var element = this.parseSpreadElement();
+	                if (!this.match(']')) {
+	                    this.context.isAssignmentTarget = false;
+	                    this.context.isBindingElement = false;
+	                    this.expect(',');
+	                }
+	                elements.push(element);
+	            }
+	            else {
+	                elements.push(this.inheritCoverGrammar(this.parseAssignmentExpression));
+	                if (!this.match(']')) {
+	                    this.expect(',');
+	                }
+	            }
+	        }
+	        this.expect(']');
+	        return this.finalize(node, new Node.ArrayExpression(elements));
+	    };
+	    // ECMA-262 12.2.6 Object Initializer
+	    Parser.prototype.parsePropertyMethod = function (params) {
+	        this.context.isAssignmentTarget = false;
+	        this.context.isBindingElement = false;
+	        var previousStrict = this.context.strict;
+	        var body = this.isolateCoverGrammar(this.parseFunctionSourceElements);
+	        if (this.context.strict && params.firstRestricted) {
+	            this.tolerateUnexpectedToken(params.firstRestricted, params.message);
+	        }
+	        if (this.context.strict && params.stricted) {
+	            this.tolerateUnexpectedToken(params.stricted, params.message);
+	        }
+	        this.context.strict = previousStrict;
+	        return body;
+	    };
+	    Parser.prototype.parsePropertyMethodFunction = function () {
+	        var isGenerator = false;
+	        var node = this.createNode();
+	        var previousAllowYield = this.context.allowYield;
+	        this.context.allowYield = false;
+	        var params = this.parseFormalParameters();
+	        var method = this.parsePropertyMethod(params);
+	        this.context.allowYield = previousAllowYield;
+	        return this.finalize(node, new Node.FunctionExpression(null, params.params, method, isGenerator));
+	    };
+	    Parser.prototype.parsePropertyMethodAsyncFunction = function () {
+	        var node = this.createNode();
+	        var previousAllowYield = this.context.allowYield;
+	        var previousAwait = this.context.await;
+	        this.context.allowYield = false;
+	        this.context.await = true;
+	        var params = this.parseFormalParameters();
+	        var method = this.parsePropertyMethod(params);
+	        this.context.allowYield = previousAllowYield;
+	        this.context.await = previousAwait;
+	        return this.finalize(node, new Node.AsyncFunctionExpression(null, params.params, method));
+	    };
+	    Parser.prototype.parseObjectPropertyKey = function () {
+	        var node = this.createNode();
+	        var token = this.nextToken();
+	        var key;
+	        switch (token.type) {
+	            case token_1.Token.StringLiteral:
+	            case token_1.Token.NumericLiteral:
+	                if (this.context.strict && token.octal) {
+	                    this.tolerateUnexpectedToken(token, messages_1.Messages.StrictOctalLiteral);
+	                }
+	                var raw = this.getTokenRaw(token);
+	                key = this.finalize(node, new Node.Literal(token.value, raw));
+	                break;
+	            case token_1.Token.Identifier:
+	            case token_1.Token.BooleanLiteral:
+	            case token_1.Token.NullLiteral:
+	            case token_1.Token.Keyword:
+	                key = this.finalize(node, new Node.Identifier(token.value));
+	                break;
+	            case token_1.Token.Punctuator:
+	                if (token.value === '[') {
+	                    key = this.isolateCoverGrammar(this.parseAssignmentExpression);
+	                    this.expect(']');
+	                }
+	                else {
+	                    key = this.throwUnexpectedToken(token);
+	                }
+	                break;
+	            default:
+	                key = this.throwUnexpectedToken(token);
+	        }
+	        return key;
+	    };
+	    Parser.prototype.isPropertyKey = function (key, value) {
+	        return (key.type === syntax_1.Syntax.Identifier && key.name === value) ||
+	            (key.type === syntax_1.Syntax.Literal && key.value === value);
+	    };
+	    Parser.prototype.parseObjectProperty = function (hasProto) {
+	        var node = this.createNode();
+	        var token = this.lookahead;
+	        var kind;
+	        var key = null;
+	        var value = null;
+	        var computed = false;
+	        var method = false;
+	        var shorthand = false;
+	        var isAsync = false;
+	        if (token.type === token_1.Token.Identifier) {
+	            var id = token.value;
+	            this.nextToken();
+	            if (id === 'async') {
+	                isAsync = !this.hasLineTerminator && (this.lookahead.type === token_1.Token.Identifier);
+	                if (isAsync) {
+	                    token = this.lookahead;
+	                    id = token.value;
+	                    this.nextToken();
+	                }
+	            }
+	            key = this.finalize(node, new Node.Identifier(id));
+	        }
+	        else if (this.match('*')) {
+	            this.nextToken();
+	        }
+	        else {
+	            computed = this.match('[');
+	            key = this.parseObjectPropertyKey();
+	        }
+	        var lookaheadPropertyKey = this.qualifiedPropertyName(this.lookahead);
+	        if (token.type === token_1.Token.Identifier && !isAsync && token.value === 'get' && lookaheadPropertyKey) {
+	            kind = 'get';
+	            computed = this.match('[');
+	            key = this.parseObjectPropertyKey();
+	            this.context.allowYield = false;
+	            value = this.parseGetterMethod();
+	        }
+	        else if (token.type === token_1.Token.Identifier && !isAsync && token.value === 'set' && lookaheadPropertyKey) {
+	            kind = 'set';
+	            computed = this.match('[');
+	            key = this.parseObjectPropertyKey();
+	            value = this.parseSetterMethod();
+	        }
+	        else if (token.type === token_1.Token.Punctuator && token.value === '*' && lookaheadPropertyKey) {
+	            kind = 'init';
+	            computed = this.match('[');
+	            key = this.parseObjectPropertyKey();
+	            value = this.parseGeneratorMethod();
+	            method = true;
+	        }
+	        else {
+	            if (!key) {
+	                this.throwUnexpectedToken(this.lookahead);
+	            }
+	            kind = 'init';
+	            if (this.match(':')) {
+	                if (!computed && this.isPropertyKey(key, '__proto__')) {
+	                    if (hasProto.value) {
+	                        this.tolerateError(messages_1.Messages.DuplicateProtoProperty);
+	                    }
+	                    hasProto.value = true;
+	                }
+	                this.nextToken();
+	                value = this.inheritCoverGrammar(this.parseAssignmentExpression);
+	            }
+	            else if (this.match('(')) {
+	                value = isAsync ? this.parsePropertyMethodAsyncFunction() : this.parsePropertyMethodFunction();
+	                method = true;
+	            }
+	            else if (token.type === token_1.Token.Identifier) {
+	                var id = this.finalize(node, new Node.Identifier(token.value));
+	                if (this.match('=')) {
+	                    this.context.firstCoverInitializedNameError = this.lookahead;
+	                    this.nextToken();
+	                    shorthand = true;
+	                    var init = this.isolateCoverGrammar(this.parseAssignmentExpression);
+	                    value = this.finalize(node, new Node.AssignmentPattern(id, init));
+	                }
+	                else {
+	                    shorthand = true;
+	                    value = id;
+	                }
+	            }
+	            else {
+	                this.throwUnexpectedToken(this.nextToken());
+	            }
+	        }
+	        return this.finalize(node, new Node.Property(kind, (key), computed, value, method, shorthand));
+	    };
+	    Parser.prototype.parseObjectInitializer = function () {
+	        var node = this.createNode();
+	        this.expect('{');
+	        var properties = [];
+	        var hasProto = { value: false };
+	        while (!this.match('}')) {
+	            properties.push(this.parseObjectProperty(hasProto));
+	            if (!this.match('}')) {
+	                this.expectCommaSeparator();
+	            }
+	        }
+	        this.expect('}');
+	        return this.finalize(node, new Node.ObjectExpression(properties));
+	    };
+	    // ECMA-262 12.2.9 Template Literals
+	    Parser.prototype.parseTemplateHead = function () {
+	        assert_1.assert(this.lookahead.head, 'Template literal must start with a template head');
+	        var node = this.createNode();
+	        var token = this.nextToken();
+	        var value = {
+	            raw: token.value.raw,
+	            cooked: token.value.cooked
+	        };
+	        return this.finalize(node, new Node.TemplateElement(value, token.tail));
+	    };
+	    Parser.prototype.parseTemplateElement = function () {
+	        if (this.lookahead.type !== token_1.Token.Template) {
+	            this.throwUnexpectedToken();
+	        }
+	        var node = this.createNode();
+	        var token = this.nextToken();
+	        var value = {
+	            raw: token.value.raw,
+	            cooked: token.value.cooked
+	        };
+	        return this.finalize(node, new Node.TemplateElement(value, token.tail));
+	    };
+	    Parser.prototype.parseTemplateLiteral = function () {
+	        var node = this.createNode();
+	        var expressions = [];
+	        var quasis = [];
+	        var quasi = this.parseTemplateHead();
+	        quasis.push(quasi);
+	        while (!quasi.tail) {
+	            expressions.push(this.parseExpression());
+	            quasi = this.parseTemplateElement();
+	            quasis.push(quasi);
+	        }
+	        return this.finalize(node, new Node.TemplateLiteral(quasis, expressions));
+	    };
+	    // ECMA-262 12.2.10 The Grouping Operator
+	    Parser.prototype.reinterpretExpressionAsPattern = function (expr) {
+	        switch (expr.type) {
+	            case syntax_1.Syntax.Identifier:
+	            case syntax_1.Syntax.MemberExpression:
+	            case syntax_1.Syntax.RestElement:
+	            case syntax_1.Syntax.AssignmentPattern:
+	                break;
+	            case syntax_1.Syntax.SpreadElement:
+	                expr.type = syntax_1.Syntax.RestElement;
+	                this.reinterpretExpressionAsPattern(expr.argument);
+	                break;
+	            case syntax_1.Syntax.ArrayExpression:
+	                expr.type = syntax_1.Syntax.ArrayPattern;
+	                for (var i = 0; i < expr.elements.length; i++) {
+	                    if (expr.elements[i] !== null) {
+	                        this.reinterpretExpressionAsPattern(expr.elements[i]);
+	                    }
+	                }
+	                break;
+	            case syntax_1.Syntax.ObjectExpression:
+	                expr.type = syntax_1.Syntax.ObjectPattern;
+	                for (var i = 0; i < expr.properties.length; i++) {
+	                    this.reinterpretExpressionAsPattern(expr.properties[i].value);
+	                }
+	                break;
+	            case syntax_1.Syntax.AssignmentExpression:
+	                expr.type = syntax_1.Syntax.AssignmentPattern;
+	                delete expr.operator;
+	                this.reinterpretExpressionAsPattern(expr.left);
+	                break;
+	            default:
+	                // Allow other node type for tolerant parsing.
+	                break;
+	        }
+	    };
+	    Parser.prototype.parseGroupExpression = function () {
+	        var expr;
+	        this.expect('(');
+	        if (this.match(')')) {
+	            this.nextToken();
+	            if (!this.match('=>')) {
+	                this.expect('=>');
+	            }
+	            expr = {
+	                type: ArrowParameterPlaceHolder,
+	                params: [],
+	                async: false
+	            };
+	        }
+	        else {
+	            var startToken = this.lookahead;
+	            var params = [];
+	            if (this.match('...')) {
+	                expr = this.parseRestElement(params);
+	                this.expect(')');
+	                if (!this.match('=>')) {
+	                    this.expect('=>');
+	                }
+	                expr = {
+	                    type: ArrowParameterPlaceHolder,
+	                    params: [expr],
+	                    async: false
+	                };
+	            }
+	            else {
+	                var arrow = false;
+	                this.context.isBindingElement = true;
+	                expr = this.inheritCoverGrammar(this.parseAssignmentExpression);
+	                if (this.match(',')) {
+	                    var expressions = [];
+	                    this.context.isAssignmentTarget = false;
+	                    expressions.push(expr);
+	                    while (this.startMarker.index < this.scanner.length) {
+	                        if (!this.match(',')) {
+	                            break;
+	                        }
+	                        this.nextToken();
+	                        if (this.match(')')) {
+	                            this.nextToken();
+	                            for (var i = 0; i < expressions.length; i++) {
+	                                this.reinterpretExpressionAsPattern(expressions[i]);
+	                            }
+	                            arrow = true;
+	                            expr = {
+	                                type: ArrowParameterPlaceHolder,
+	                                params: expressions,
+	                                async: false
+	                            };
+	                        }
+	                        else if (this.match('...')) {
+	                            if (!this.context.isBindingElement) {
+	                                this.throwUnexpectedToken(this.lookahead);
+	                            }
+	                            expressions.push(this.parseRestElement(params));
+	                            this.expect(')');
+	                            if (!this.match('=>')) {
+	                                this.expect('=>');
+	                            }
+	                            this.context.isBindingElement = false;
+	                            for (var i = 0; i < expressions.length; i++) {
+	                                this.reinterpretExpressionAsPattern(expressions[i]);
+	                            }
+	                            arrow = true;
+	                            expr = {
+	                                type: ArrowParameterPlaceHolder,
+	                                params: expressions,
+	                                async: false
+	                            };
+	                        }
+	                        else {
+	                            expressions.push(this.inheritCoverGrammar(this.parseAssignmentExpression));
+	                        }
+	                        if (arrow) {
+	                            break;
+	                        }
+	                    }
+	                    if (!arrow) {
+	                        expr = this.finalize(this.startNode(startToken), new Node.SequenceExpression(expressions));
+	                    }
+	                }
+	                if (!arrow) {
+	                    this.expect(')');
+	                    if (this.match('=>')) {
+	                        if (expr.type === syntax_1.Syntax.Identifier && expr.name === 'yield') {
+	                            arrow = true;
+	                            expr = {
+	                                type: ArrowParameterPlaceHolder,
+	                                params: [expr],
+	                                async: false
+	                            };
+	                        }
+	                        if (!arrow) {
+	                            if (!this.context.isBindingElement) {
+	                                this.throwUnexpectedToken(this.lookahead);
+	                            }
+	                            if (expr.type === syntax_1.Syntax.SequenceExpression) {
+	                                for (var i = 0; i < expr.expressions.length; i++) {
+	                                    this.reinterpretExpressionAsPattern(expr.expressions[i]);
+	                                }
+	                            }
+	                            else {
+	                                this.reinterpretExpressionAsPattern(expr);
+	                            }
+	                            var params_1 = (expr.type === syntax_1.Syntax.SequenceExpression ? expr.expressions : [expr]);
+	                            expr = {
+	                                type: ArrowParameterPlaceHolder,
+	                                params: params_1,
+	                                async: false
+	                            };
+	                        }
+	                    }
+	                    this.context.isBindingElement = false;
+	                }
+	            }
+	        }
+	        return expr;
+	    };
+	    // ECMA-262 12.3 Left-Hand-Side Expressions
+	    Parser.prototype.parseArguments = function () {
+	        this.expect('(');
+	        var args = [];
+	        if (!this.match(')')) {
+	            while (true) {
+	                var expr = this.match('...') ? this.parseSpreadElement() :
+	                    this.isolateCoverGrammar(this.parseAssignmentExpression);
+	                args.push(expr);
+	                if (this.match(')')) {
+	                    break;
+	                }
+	                this.expectCommaSeparator();
+	                if (this.match(')')) {
+	                    break;
+	                }
+	            }
+	        }
+	        this.expect(')');
+	        return args;
+	    };
+	    Parser.prototype.isIdentifierName = function (token) {
+	        return token.type === token_1.Token.Identifier ||
+	            token.type === token_1.Token.Keyword ||
+	            token.type === token_1.Token.BooleanLiteral ||
+	            token.type === token_1.Token.NullLiteral;
+	    };
+	    Parser.prototype.parseIdentifierName = function () {
+	        var node = this.createNode();
+	        var token = this.nextToken();
+	        if (!this.isIdentifierName(token)) {
+	            this.throwUnexpectedToken(token);
+	        }
+	        return this.finalize(node, new Node.Identifier(token.value));
+	    };
+	    Parser.prototype.parseNewExpression = function () {
+	        var node = this.createNode();
+	        var id = this.parseIdentifierName();
+	        assert_1.assert(id.name === 'new', 'New expression must start with `new`');
+	        var expr;
+	        if (this.match('.')) {
+	            this.nextToken();
+	            if (this.lookahead.type === token_1.Token.Identifier && this.context.inFunctionBody && this.lookahead.value === 'target') {
+	                var property = this.parseIdentifierName();
+	                expr = new Node.MetaProperty(id, property);
+	            }
+	            else {
+	                this.throwUnexpectedToken(this.lookahead);
+	            }
+	        }
+	        else {
+	            var callee = this.isolateCoverGrammar(this.parseLeftHandSideExpression);
+	            var args = this.match('(') ? this.parseArguments() : [];
+	            expr = new Node.NewExpression(callee, args);
+	            this.context.isAssignmentTarget = false;
+	            this.context.isBindingElement = false;
+	        }
+	        return this.finalize(node, expr);
+	    };
+	    Parser.prototype.parseAsyncArgument = function () {
+	        var arg = this.parseAssignmentExpression();
+	        this.context.firstCoverInitializedNameError = null;
+	        return arg;
+	    };
+	    Parser.prototype.parseAsyncArguments = function () {
+	        this.expect('(');
+	        var args = [];
+	        if (!this.match(')')) {
+	            while (true) {
+	                var expr = this.match('...') ? this.parseSpreadElement() :
+	                    this.isolateCoverGrammar(this.parseAsyncArgument);
+	                args.push(expr);
+	                if (this.match(')')) {
+	                    break;
+	                }
+	                this.expectCommaSeparator();
+	                if (this.match(')')) {
+	                    break;
+	                }
+	            }
+	        }
+	        this.expect(')');
+	        return args;
+	    };
+	    Parser.prototype.parseLeftHandSideExpressionAllowCall = function () {
+	        var startToken = this.lookahead;
+	        var maybeAsync = this.matchContextualKeyword('async');
+	        var previousAllowIn = this.context.allowIn;
+	        this.context.allowIn = true;
+	        var expr;
+	        if (this.matchKeyword('super') && this.context.inFunctionBody) {
+	            expr = this.createNode();
+	            this.nextToken();
+	            expr = this.finalize(expr, new Node.Super());
+	            if (!this.match('(') && !this.match('.') && !this.match('[')) {
+	                this.throwUnexpectedToken(this.lookahead);
+	            }
+	        }
+	        else {
+	            expr = this.inheritCoverGrammar(this.matchKeyword('new') ? this.parseNewExpression : this.parsePrimaryExpression);
+	        }
+	        while (true) {
+	            if (this.match('.')) {
+	                this.context.isBindingElement = false;
+	                this.context.isAssignmentTarget = true;
+	                this.expect('.');
+	                var property = this.parseIdentifierName();
+	                expr = this.finalize(this.startNode(startToken), new Node.StaticMemberExpression(expr, property));
+	            }
+	            else if (this.match('(')) {
+	                var asyncArrow = maybeAsync && (startToken.lineNumber === this.lookahead.lineNumber);
+	                this.context.isBindingElement = false;
+	                this.context.isAssignmentTarget = false;
+	                var args = asyncArrow ? this.parseAsyncArguments() : this.parseArguments();
+	                expr = this.finalize(this.startNode(startToken), new Node.CallExpression(expr, args));
+	                if (asyncArrow && this.match('=>')) {
+	                    expr = {
+	                        type: ArrowParameterPlaceHolder,
+	                        params: args,
+	                        async: true
+	                    };
+	                }
+	            }
+	            else if (this.match('[')) {
+	                this.context.isBindingElement = false;
+	                this.context.isAssignmentTarget = true;
+	                this.expect('[');
+	                var property = this.isolateCoverGrammar(this.parseExpression);
+	                this.expect(']');
+	                expr = this.finalize(this.startNode(startToken), new Node.ComputedMemberExpression(expr, property));
+	            }
+	            else if (this.lookahead.type === token_1.Token.Template && this.lookahead.head) {
+	                var quasi = this.parseTemplateLiteral();
+	                expr = this.finalize(this.startNode(startToken), new Node.TaggedTemplateExpression(expr, quasi));
+	            }
+	            else {
+	                break;
+	            }
+	        }
+	        this.context.allowIn = previousAllowIn;
+	        return expr;
+	    };
+	    Parser.prototype.parseSuper = function () {
+	        var node = this.createNode();
+	        this.expectKeyword('super');
+	        if (!this.match('[') && !this.match('.')) {
+	            this.throwUnexpectedToken(this.lookahead);
+	        }
+	        return this.finalize(node, new Node.Super());
+	    };
+	    Parser.prototype.parseLeftHandSideExpression = function () {
+	        assert_1.assert(this.context.allowIn, 'callee of new expression always allow in keyword.');
+	        var node = this.startNode(this.lookahead);
+	        var expr = (this.matchKeyword('super') && this.context.inFunctionBody) ? this.parseSuper() :
+	            this.inheritCoverGrammar(this.matchKeyword('new') ? this.parseNewExpression : this.parsePrimaryExpression);
+	        while (true) {
+	            if (this.match('[')) {
+	                this.context.isBindingElement = false;
+	                this.context.isAssignmentTarget = true;
+	                this.expect('[');
+	                var property = this.isolateCoverGrammar(this.parseExpression);
+	                this.expect(']');
+	                expr = this.finalize(node, new Node.ComputedMemberExpression(expr, property));
+	            }
+	            else if (this.match('.')) {
+	                this.context.isBindingElement = false;
+	                this.context.isAssignmentTarget = true;
+	                this.expect('.');
+	                var property = this.parseIdentifierName();
+	                expr = this.finalize(node, new Node.StaticMemberExpression(expr, property));
+	            }
+	            else if (this.lookahead.type === token_1.Token.Template && this.lookahead.head) {
+	                var quasi = this.parseTemplateLiteral();
+	                expr = this.finalize(node, new Node.TaggedTemplateExpression(expr, quasi));
+	            }
+	            else {
+	                break;
+	            }
+	        }
+	        return expr;
+	    };
+	    // ECMA-262 12.4 Update Expressions
+	    Parser.prototype.parseUpdateExpression = function () {
+	        var expr;
+	        var startToken = this.lookahead;
+	        if (this.match('++') || this.match('--')) {
+	            var node = this.startNode(startToken);
+	            var token = this.nextToken();
+	            expr = this.inheritCoverGrammar(this.parseUnaryExpression);
+	            if (this.context.strict && expr.type === syntax_1.Syntax.Identifier && this.scanner.isRestrictedWord(expr.name)) {
+	                this.tolerateError(messages_1.Messages.StrictLHSPrefix);
+	            }
+	            if (!this.context.isAssignmentTarget) {
+	                this.tolerateError(messages_1.Messages.InvalidLHSInAssignment);
+	            }
+	            var prefix = true;
+	            expr = this.finalize(node, new Node.UpdateExpression(token.value, expr, prefix));
+	            this.context.isAssignmentTarget = false;
+	            this.context.isBindingElement = false;
+	        }
+	        else {
+	            expr = this.inheritCoverGrammar(this.parseLeftHandSideExpressionAllowCall);
+	            if (!this.hasLineTerminator && this.lookahead.type === token_1.Token.Punctuator) {
+	                if (this.match('++') || this.match('--')) {
+	                    if (this.context.strict && expr.type === syntax_1.Syntax.Identifier && this.scanner.isRestrictedWord(expr.name)) {
+	                        this.tolerateError(messages_1.Messages.StrictLHSPostfix);
+	                    }
+	                    if (!this.context.isAssignmentTarget) {
+	                        this.tolerateError(messages_1.Messages.InvalidLHSInAssignment);
+	                    }
+	                    this.context.isAssignmentTarget = false;
+	                    this.context.isBindingElement = false;
+	                    var operator = this.nextToken().value;
+	                    var prefix = false;
+	                    expr = this.finalize(this.startNode(startToken), new Node.UpdateExpression(operator, expr, prefix));
+	                }
+	            }
+	        }
+	        return expr;
+	    };
+	    // ECMA-262 12.5 Unary Operators
+	    Parser.prototype.parseAwaitExpression = function () {
+	        var node = this.createNode();
+	        this.nextToken();
+	        var argument = this.parseUnaryExpression();
+	        return this.finalize(node, new Node.AwaitExpression(argument));
+	    };
+	    Parser.prototype.parseUnaryExpression = function () {
+	        var expr;
+	        if (this.match('+') || this.match('-') || this.match('~') || this.match('!') ||
+	            this.matchKeyword('delete') || this.matchKeyword('void') || this.matchKeyword('typeof')) {
+	            var node = this.startNode(this.lookahead);
+	            var token = this.nextToken();
+	            expr = this.inheritCoverGrammar(this.parseUnaryExpression);
+	            expr = this.finalize(node, new Node.UnaryExpression(token.value, expr));
+	            if (this.context.strict && expr.operator === 'delete' && expr.argument.type === syntax_1.Syntax.Identifier) {
+	                this.tolerateError(messages_1.Messages.StrictDelete);
+	            }
+	            this.context.isAssignmentTarget = false;
+	            this.context.isBindingElement = false;
+	        }
+	        else if (this.context.await && this.matchContextualKeyword('await')) {
+	            expr = this.parseAwaitExpression();
+	        }
+	        else {
+	            expr = this.parseUpdateExpression();
+	        }
+	        return expr;
+	    };
+	    Parser.prototype.parseExponentiationExpression = function () {
+	        var startToken = this.lookahead;
+	        var expr = this.inheritCoverGrammar(this.parseUnaryExpression);
+	        if (expr.type !== syntax_1.Syntax.UnaryExpression && this.match('**')) {
+	            this.nextToken();
+	            this.context.isAssignmentTarget = false;
+	            this.context.isBindingElement = false;
+	            var left = expr;
+	            var right = this.isolateCoverGrammar(this.parseExponentiationExpression);
+	            expr = this.finalize(this.startNode(startToken), new Node.BinaryExpression('**', left, right));
+	        }
+	        return expr;
+	    };
+	    // ECMA-262 12.6 Exponentiation Operators
+	    // ECMA-262 12.7 Multiplicative Operators
+	    // ECMA-262 12.8 Additive Operators
+	    // ECMA-262 12.9 Bitwise Shift Operators
+	    // ECMA-262 12.10 Relational Operators
+	    // ECMA-262 12.11 Equality Operators
+	    // ECMA-262 12.12 Binary Bitwise Operators
+	    // ECMA-262 12.13 Binary Logical Operators
+	    Parser.prototype.binaryPrecedence = function (token) {
+	        var op = token.value;
+	        var precedence;
+	        if (token.type === token_1.Token.Punctuator) {
+	            precedence = this.operatorPrecedence[op] || 0;
+	        }
+	        else if (token.type === token_1.Token.Keyword) {
+	            precedence = (op === 'instanceof' || (this.context.allowIn && op === 'in')) ? 7 : 0;
+	        }
+	        else {
+	            precedence = 0;
+	        }
+	        return precedence;
+	    };
+	    Parser.prototype.parseBinaryExpression = function () {
+	        var startToken = this.lookahead;
+	        var expr = this.inheritCoverGrammar(this.parseExponentiationExpression);
+	        var token = this.lookahead;
+	        var prec = this.binaryPrecedence(token);
+	        if (prec > 0) {
+	            this.nextToken();
+	            token.prec = prec;
+	            this.context.isAssignmentTarget = false;
+	            this.context.isBindingElement = false;
+	            var markers = [startToken, this.lookahead];
+	            var left = expr;
+	            var right = this.isolateCoverGrammar(this.parseExponentiationExpression);
+	            var stack = [left, token, right];
+	            while (true) {
+	                prec = this.binaryPrecedence(this.lookahead);
+	                if (prec <= 0) {
+	                    break;
+	                }
+	                // Reduce: make a binary expression from the three topmost entries.
+	                while ((stack.length > 2) && (prec <= stack[stack.length - 2].prec)) {
+	                    right = stack.pop();
+	                    var operator = stack.pop().value;
+	                    left = stack.pop();
+	                    markers.pop();
+	                    var node = this.startNode(markers[markers.length - 1]);
+	                    stack.push(this.finalize(node, new Node.BinaryExpression(operator, left, right)));
+	                }
+	                // Shift.
+	                token = this.nextToken();
+	                token.prec = prec;
+	                stack.push(token);
+	                markers.push(this.lookahead);
+	                stack.push(this.isolateCoverGrammar(this.parseExponentiationExpression));
+	            }
+	            // Final reduce to clean-up the stack.
+	            var i = stack.length - 1;
+	            expr = stack[i];
+	            markers.pop();
+	            while (i > 1) {
+	                var node = this.startNode(markers.pop());
+	                expr = this.finalize(node, new Node.BinaryExpression(stack[i - 1].value, stack[i - 2], expr));
+	                i -= 2;
+	            }
+	        }
+	        return expr;
+	    };
+	    // ECMA-262 12.14 Conditional Operator
+	    Parser.prototype.parseConditionalExpression = function () {
+	        var startToken = this.lookahead;
+	        var expr = this.inheritCoverGrammar(this.parseBinaryExpression);
+	        if (this.match('?')) {
+	            this.nextToken();
+	            var previousAllowIn = this.context.allowIn;
+	            this.context.allowIn = true;
+	            var consequent = this.isolateCoverGrammar(this.parseAssignmentExpression);
+	            this.context.allowIn = previousAllowIn;
+	            this.expect(':');
+	            var alternate = this.isolateCoverGrammar(this.parseAssignmentExpression);
+	            expr = this.finalize(this.startNode(startToken), new Node.ConditionalExpression(expr, consequent, alternate));
+	            this.context.isAssignmentTarget = false;
+	            this.context.isBindingElement = false;
+	        }
+	        return expr;
+	    };
+	    // ECMA-262 12.15 Assignment Operators
+	    Parser.prototype.checkPatternParam = function (options, param) {
+	        switch (param.type) {
+	            case syntax_1.Syntax.Identifier:
+	                this.validateParam(options, param, param.name);
+	                break;
+	            case syntax_1.Syntax.RestElement:
+	                this.checkPatternParam(options, param.argument);
+	                break;
+	            case syntax_1.Syntax.AssignmentPattern:
+	                this.checkPatternParam(options, param.left);
+	                break;
+	            case syntax_1.Syntax.ArrayPattern:
+	                for (var i = 0; i < param.elements.length; i++) {
+	                    if (param.elements[i] !== null) {
+	                        this.checkPatternParam(options, param.elements[i]);
+	                    }
+	                }
+	                break;
+	            case syntax_1.Syntax.ObjectPattern:
+	                for (var i = 0; i < param.properties.length; i++) {
+	                    this.checkPatternParam(options, param.properties[i].value);
+	                }
+	                break;
+	            default:
+	                break;
+	        }
+	    };
+	    Parser.prototype.reinterpretAsCoverFormalsList = function (expr) {
+	        var params = [expr];
+	        var options;
+	        var asyncArrow = false;
+	        switch (expr.type) {
+	            case syntax_1.Syntax.Identifier:
+	                break;
+	            case ArrowParameterPlaceHolder:
+	                params = expr.params;
+	                asyncArrow = expr.async;
+	                break;
+	            default:
+	                return null;
+	        }
+	        options = {
+	            paramSet: {}
+	        };
+	        for (var i = 0; i < params.length; ++i) {
+	            var param = params[i];
+	            if (param.type === syntax_1.Syntax.AssignmentPattern) {
+	                if (param.right.type === syntax_1.Syntax.YieldExpression) {
+	                    if (param.right.argument) {
+	                        this.throwUnexpectedToken(this.lookahead);
+	                    }
+	                    param.right.type = syntax_1.Syntax.Identifier;
+	                    param.right.name = 'yield';
+	                    delete param.right.argument;
+	                    delete param.right.delegate;
+	                }
+	            }
+	            else if (asyncArrow && param.type === syntax_1.Syntax.Identifier && param.name === 'await') {
+	                this.throwUnexpectedToken(this.lookahead);
+	            }
+	            this.checkPatternParam(options, param);
+	            params[i] = param;
+	        }
+	        if (this.context.strict || !this.context.allowYield) {
+	            for (var i = 0; i < params.length; ++i) {
+	                var param = params[i];
+	                if (param.type === syntax_1.Syntax.YieldExpression) {
+	                    this.throwUnexpectedToken(this.lookahead);
+	                }
+	            }
+	        }
+	        if (options.message === messages_1.Messages.StrictParamDupe) {
+	            var token = this.context.strict ? options.stricted : options.firstRestricted;
+	            this.throwUnexpectedToken(token, options.message);
+	        }
+	        return {
+	            params: params,
+	            stricted: options.stricted,
+	            firstRestricted: options.firstRestricted,
+	            message: options.message
+	        };
+	    };
+	    Parser.prototype.parseAssignmentExpression = function () {
+	        var expr;
+	        if (!this.context.allowYield && this.matchKeyword('yield')) {
+	            expr = this.parseYieldExpression();
+	        }
+	        else {
+	            var startToken = this.lookahead;
+	            var token = startToken;
+	            expr = this.parseConditionalExpression();
+	            if (token.type === token_1.Token.Identifier && (token.lineNumber === this.lookahead.lineNumber) && token.value === 'async' && (this.lookahead.type === token_1.Token.Identifier)) {
+	                var arg = this.parsePrimaryExpression();
+	                expr = {
+	                    type: ArrowParameterPlaceHolder,
+	                    params: [arg],
+	                    async: true
+	                };
+	            }
+	            if (expr.type === ArrowParameterPlaceHolder || this.match('=>')) {
+	                // ECMA-262 14.2 Arrow Function Definitions
+	                this.context.isAssignmentTarget = false;
+	                this.context.isBindingElement = false;
+	                var isAsync = expr.async;
+	                var list = this.reinterpretAsCoverFormalsList(expr);
+	                if (list) {
+	                    if (this.hasLineTerminator) {
+	                        this.tolerateUnexpectedToken(this.lookahead);
+	                    }
+	                    this.context.firstCoverInitializedNameError = null;
+	                    var previousStrict = this.context.strict;
+	                    var previousAllowYield = this.context.allowYield;
+	                    var previousAwait = this.context.await;
+	                    this.context.allowYield = true;
+	                    this.context.await = isAsync;
+	                    var node = this.startNode(startToken);
+	                    this.expect('=>');
+	                    var body = this.match('{') ? this.parseFunctionSourceElements() :
+	                        this.isolateCoverGrammar(this.parseAssignmentExpression);
+	                    var expression = body.type !== syntax_1.Syntax.BlockStatement;
+	                    if (this.context.strict && list.firstRestricted) {
+	                        this.throwUnexpectedToken(list.firstRestricted, list.message);
+	                    }
+	                    if (this.context.strict && list.stricted) {
+	                        this.tolerateUnexpectedToken(list.stricted, list.message);
+	                    }
+	                    expr = isAsync ? this.finalize(node, new Node.AsyncArrowFunctionExpression(list.params, body, expression)) :
+	                        this.finalize(node, new Node.ArrowFunctionExpression(list.params, body, expression));
+	                    this.context.strict = previousStrict;
+	                    this.context.allowYield = previousAllowYield;
+	                    this.context.await = previousAwait;
+	                }
+	            }
+	            else {
+	                if (this.matchAssign()) {
+	                    if (!this.context.isAssignmentTarget) {
+	                        this.tolerateError(messages_1.Messages.InvalidLHSInAssignment);
+	                    }
+	                    if (this.context.strict && expr.type === syntax_1.Syntax.Identifier) {
+	                        var id = (expr);
+	                        if (this.scanner.isRestrictedWord(id.name)) {
+	                            this.tolerateUnexpectedToken(token, messages_1.Messages.StrictLHSAssignment);
+	                        }
+	                        if (this.scanner.isStrictModeReservedWord(id.name)) {
+	                            this.tolerateUnexpectedToken(token, messages_1.Messages.StrictReservedWord);
+	                        }
+	                    }
+	                    if (!this.match('=')) {
+	                        this.context.isAssignmentTarget = false;
+	                        this.context.isBindingElement = false;
+	                    }
+	                    else {
+	                        this.reinterpretExpressionAsPattern(expr);
+	                    }
+	                    token = this.nextToken();
+	                    var right = this.isolateCoverGrammar(this.parseAssignmentExpression);
+	                    expr = this.finalize(this.startNode(startToken), new Node.AssignmentExpression(token.value, expr, right));
+	                    this.context.firstCoverInitializedNameError = null;
+	                }
+	            }
+	        }
+	        return expr;
+	    };
+	    // ECMA-262 12.16 Comma Operator
+	    Parser.prototype.parseExpression = function () {
+	        var startToken = this.lookahead;
+	        var expr = this.isolateCoverGrammar(this.parseAssignmentExpression);
+	        if (this.match(',')) {
+	            var expressions = [];
+	            expressions.push(expr);
+	            while (this.startMarker.index < this.scanner.length) {
+	                if (!this.match(',')) {
+	                    break;
+	                }
+	                this.nextToken();
+	                expressions.push(this.isolateCoverGrammar(this.parseAssignmentExpression));
+	            }
+	            expr = this.finalize(this.startNode(startToken), new Node.SequenceExpression(expressions));
+	        }
+	        return expr;
+	    };
+	    // ECMA-262 13.2 Block
+	    Parser.prototype.parseStatementListItem = function () {
+	        var statement;
+	        this.context.isAssignmentTarget = true;
+	        this.context.isBindingElement = true;
+	        if (this.lookahead.type === token_1.Token.Keyword) {
+	            switch (this.lookahead.value) {
+	                case 'export':
+	                    if (!this.context.isModule) {
+	                        this.tolerateUnexpectedToken(this.lookahead, messages_1.Messages.IllegalExportDeclaration);
+	                    }
+	                    statement = this.parseExportDeclaration();
+	                    break;
+	                case 'import':
+	                    if (!this.context.isModule) {
+	                        this.tolerateUnexpectedToken(this.lookahead, messages_1.Messages.IllegalImportDeclaration);
+	                    }
+	                    statement = this.parseImportDeclaration();
+	                    break;
+	                case 'const':
+	                    statement = this.parseLexicalDeclaration({ inFor: false });
+	                    break;
+	                case 'function':
+	                    statement = this.parseFunctionDeclaration();
+	                    break;
+	                case 'class':
+	                    statement = this.parseClassDeclaration();
+	                    break;
+	                case 'let':
+	                    statement = this.isLexicalDeclaration() ? this.parseLexicalDeclaration({ inFor: false }) : this.parseStatement();
+	                    break;
+	                default:
+	                    statement = this.parseStatement();
+	                    break;
+	            }
+	        }
+	        else {
+	            statement = this.parseStatement();
+	        }
+	        return statement;
+	    };
+	    Parser.prototype.parseBlock = function () {
+	        var node = this.createNode();
+	        this.expect('{');
+	        var block = [];
+	        while (true) {
+	            if (this.match('}')) {
+	                break;
+	            }
+	            block.push(this.parseStatementListItem());
+	        }
+	        this.expect('}');
+	        return this.finalize(node, new Node.BlockStatement(block));
+	    };
+	    // ECMA-262 13.3.1 Let and Const Declarations
+	    Parser.prototype.parseLexicalBinding = function (kind, options) {
+	        var node = this.createNode();
+	        var params = [];
+	        var id = this.parsePattern(params, kind);
+	        // ECMA-262 12.2.1
+	        if (this.context.strict && id.type === syntax_1.Syntax.Identifier) {
+	            if (this.scanner.isRestrictedWord((id).name)) {
+	                this.tolerateError(messages_1.Messages.StrictVarName);
+	            }
+	        }
+	        var init = null;
+	        if (kind === 'const') {
+	            if (!this.matchKeyword('in') && !this.matchContextualKeyword('of')) {
+	                if (this.match('=')) {
+	                    this.nextToken();
+	                    init = this.isolateCoverGrammar(this.parseAssignmentExpression);
+	                }
+	                else {
+	                    this.throwError(messages_1.Messages.DeclarationMissingInitializer, 'const');
+	                }
+	            }
+	        }
+	        else if ((!options.inFor && id.type !== syntax_1.Syntax.Identifier) || this.match('=')) {
+	            this.expect('=');
+	            init = this.isolateCoverGrammar(this.parseAssignmentExpression);
+	        }
+	        return this.finalize(node, new Node.VariableDeclarator(id, init));
+	    };
+	    Parser.prototype.parseBindingList = function (kind, options) {
+	        var list = [this.parseLexicalBinding(kind, options)];
+	        while (this.match(',')) {
+	            this.nextToken();
+	            list.push(this.parseLexicalBinding(kind, options));
+	        }
+	        return list;
+	    };
+	    Parser.prototype.isLexicalDeclaration = function () {
+	        var previousIndex = this.scanner.index;
+	        var previousLineNumber = this.scanner.lineNumber;
+	        var previousLineStart = this.scanner.lineStart;
+	        this.collectComments();
+	        var next = this.scanner.lex();
+	        this.scanner.index = previousIndex;
+	        this.scanner.lineNumber = previousLineNumber;
+	        this.scanner.lineStart = previousLineStart;
+	        return (next.type === token_1.Token.Identifier) ||
+	            (next.type === token_1.Token.Punctuator && next.value === '[') ||
+	            (next.type === token_1.Token.Punctuator && next.value === '{') ||
+	            (next.type === token_1.Token.Keyword && next.value === 'let') ||
+	            (next.type === token_1.Token.Keyword && next.value === 'yield');
+	    };
+	    Parser.prototype.parseLexicalDeclaration = function (options) {
+	        var node = this.createNode();
+	        var kind = this.nextToken().value;
+	        assert_1.assert(kind === 'let' || kind === 'const', 'Lexical declaration must be either let or const');
+	        var declarations = this.parseBindingList(kind, options);
+	        this.consumeSemicolon();
+	        return this.finalize(node, new Node.VariableDeclaration(declarations, kind));
+	    };
+	    // ECMA-262 13.3.3 Destructuring Binding Patterns
+	    Parser.prototype.parseBindingRestElement = function (params, kind) {
+	        var node = this.createNode();
+	        this.expect('...');
+	        params.push(this.lookahead);
+	        var arg = this.parseVariableIdentifier(kind);
+	        return this.finalize(node, new Node.RestElement(arg));
+	    };
+	    Parser.prototype.parseArrayPattern = function (params, kind) {
+	        var node = this.createNode();
+	        this.expect('[');
+	        var elements = [];
+	        while (!this.match(']')) {
+	            if (this.match(',')) {
+	                this.nextToken();
+	                elements.push(null);
+	            }
+	            else {
+	                if (this.match('...')) {
+	                    elements.push(this.parseBindingRestElement(params, kind));
+	                    break;
+	                }
+	                else {
+	                    elements.push(this.parsePatternWithDefault(params, kind));
+	                }
+	                if (!this.match(']')) {
+	                    this.expect(',');
+	                }
+	            }
+	        }
+	        this.expect(']');
+	        return this.finalize(node, new Node.ArrayPattern(elements));
+	    };
+	    Parser.prototype.parsePropertyPattern = function (params, kind) {
+	        var node = this.createNode();
+	        var computed = false;
+	        var shorthand = false;
+	        var method = false;
+	        var key;
+	        var value;
+	        if (this.lookahead.type === token_1.Token.Identifier) {
+	            var keyToken = this.lookahead;
+	            key = this.parseVariableIdentifier();
+	            var init = this.finalize(node, new Node.Identifier(keyToken.value));
+	            if (this.match('=')) {
+	                params.push(keyToken);
+	                shorthand = true;
+	                this.nextToken();
+	                var expr = this.parseAssignmentExpression();
+	                value = this.finalize(this.startNode(keyToken), new Node.AssignmentPattern(init, expr));
+	            }
+	            else if (!this.match(':')) {
+	                params.push(keyToken);
+	                shorthand = true;
+	                value = init;
+	            }
+	            else {
+	                this.expect(':');
+	                value = this.parsePatternWithDefault(params, kind);
+	            }
+	        }
+	        else {
+	            computed = this.match('[');
+	            key = this.parseObjectPropertyKey();
+	            this.expect(':');
+	            value = this.parsePatternWithDefault(params, kind);
+	        }
+	        return this.finalize(node, new Node.Property('init', key, computed, value, method, shorthand));
+	    };
+	    Parser.prototype.parseObjectPattern = function (params, kind) {
+	        var node = this.createNode();
+	        var properties = [];
+	        this.expect('{');
+	        while (!this.match('}')) {
+	            properties.push(this.parsePropertyPattern(params, kind));
+	            if (!this.match('}')) {
+	                this.expect(',');
+	            }
+	        }
+	        this.expect('}');
+	        return this.finalize(node, new Node.ObjectPattern(properties));
+	    };
+	    Parser.prototype.parsePattern = function (params, kind) {
+	        var pattern;
+	        if (this.match('[')) {
+	            pattern = this.parseArrayPattern(params, kind);
+	        }
+	        else if (this.match('{')) {
+	            pattern = this.parseObjectPattern(params, kind);
+	        }
+	        else {
+	            if (this.matchKeyword('let') && (kind === 'const' || kind === 'let')) {
+	                this.tolerateUnexpectedToken(this.lookahead, messages_1.Messages.LetInLexicalBinding);
+	            }
+	            params.push(this.lookahead);
+	            pattern = this.parseVariableIdentifier(kind);
+	        }
+	        return pattern;
+	    };
+	    Parser.prototype.parsePatternWithDefault = function (params, kind) {
+	        var startToken = this.lookahead;
+	        var pattern = this.parsePattern(params, kind);
+	        if (this.match('=')) {
+	            this.nextToken();
+	            var previousAllowYield = this.context.allowYield;
+	            this.context.allowYield = true;
+	            var right = this.isolateCoverGrammar(this.parseAssignmentExpression);
+	            this.context.allowYield = previousAllowYield;
+	            pattern = this.finalize(this.startNode(startToken), new Node.AssignmentPattern(pattern, right));
+	        }
+	        return pattern;
+	    };
+	    // ECMA-262 13.3.2 Variable Statement
+	    Parser.prototype.parseVariableIdentifier = function (kind) {
+	        var node = this.createNode();
+	        var token = this.nextToken();
+	        if (token.type === token_1.Token.Keyword && token.value === 'yield') {
+	            if (this.context.strict) {
+	                this.tolerateUnexpectedToken(token, messages_1.Messages.StrictReservedWord);
+	            }
+	            if (!this.context.allowYield) {
+	                this.throwUnexpectedToken(token);
+	            }
+	        }
+	        else if (token.type !== token_1.Token.Identifier) {
+	            if (this.context.strict && token.type === token_1.Token.Keyword && this.scanner.isStrictModeReservedWord(token.value)) {
+	                this.tolerateUnexpectedToken(token, messages_1.Messages.StrictReservedWord);
+	            }
+	            else {
+	                if (this.context.strict || token.value !== 'let' || kind !== 'var') {
+	                    this.throwUnexpectedToken(token);
+	                }
+	            }
+	        }
+	        else if ((this.context.isModule || this.context.await) && token.type === token_1.Token.Identifier && token.value === 'await') {
+	            this.tolerateUnexpectedToken(token);
+	        }
+	        return this.finalize(node, new Node.Identifier(token.value));
+	    };
+	    Parser.prototype.parseVariableDeclaration = function (options) {
+	        var node = this.createNode();
+	        var params = [];
+	        var id = this.parsePattern(params, 'var');
+	        // ECMA-262 12.2.1
+	        if (this.context.strict && id.type === syntax_1.Syntax.Identifier) {
+	            if (this.scanner.isRestrictedWord((id).name)) {
+	                this.tolerateError(messages_1.Messages.StrictVarName);
+	            }
+	        }
+	        var init = null;
+	        if (this.match('=')) {
+	            this.nextToken();
+	            init = this.isolateCoverGrammar(this.parseAssignmentExpression);
+	        }
+	        else if (id.type !== syntax_1.Syntax.Identifier && !options.inFor) {
+	            this.expect('=');
+	        }
+	        return this.finalize(node, new Node.VariableDeclarator(id, init));
+	    };
+	    Parser.prototype.parseVariableDeclarationList = function (options) {
+	        var opt = { inFor: options.inFor };
+	        var list = [];
+	        list.push(this.parseVariableDeclaration(opt));
+	        while (this.match(',')) {
+	            this.nextToken();
+	            list.push(this.parseVariableDeclaration(opt));
+	        }
+	        return list;
+	    };
+	    Parser.prototype.parseVariableStatement = function () {
+	        var node = this.createNode();
+	        this.expectKeyword('var');
+	        var declarations = this.parseVariableDeclarationList({ inFor: false });
+	        this.consumeSemicolon();
+	        return this.finalize(node, new Node.VariableDeclaration(declarations, 'var'));
+	    };
+	    // ECMA-262 13.4 Empty Statement
+	    Parser.prototype.parseEmptyStatement = function () {
+	        var node = this.createNode();
+	        this.expect(';');
+	        return this.finalize(node, new Node.EmptyStatement());
+	    };
+	    // ECMA-262 13.5 Expression Statement
+	    Parser.prototype.parseExpressionStatement = function () {
+	        var node = this.createNode();
+	        var expr = this.parseExpression();
+	        this.consumeSemicolon();
+	        return this.finalize(node, new Node.ExpressionStatement(expr));
+	    };
+	    // ECMA-262 13.6 If statement
+	    Parser.prototype.parseIfStatement = function () {
+	        var node = this.createNode();
+	        var consequent;
+	        var alternate = null;
+	        this.expectKeyword('if');
+	        this.expect('(');
+	        var test = this.parseExpression();
+	        if (!this.match(')') && this.config.tolerant) {
+	            this.tolerateUnexpectedToken(this.nextToken());
+	            consequent = this.finalize(this.createNode(), new Node.EmptyStatement());
+	        }
+	        else {
+	            this.expect(')');
+	            consequent = this.parseStatement();
+	            if (this.matchKeyword('else')) {
+	                this.nextToken();
+	                alternate = this.parseStatement();
+	            }
+	        }
+	        return this.finalize(node, new Node.IfStatement(test, consequent, alternate));
+	    };
+	    // ECMA-262 13.7.2 The do-while Statement
+	    Parser.prototype.parseDoWhileStatement = function () {
+	        var node = this.createNode();
+	        this.expectKeyword('do');
+	        var previousInIteration = this.context.inIteration;
+	        this.context.inIteration = true;
+	        var body = this.parseStatement();
+	        this.context.inIteration = previousInIteration;
+	        this.expectKeyword('while');
+	        this.expect('(');
+	        var test = this.parseExpression();
+	        this.expect(')');
+	        if (this.match(';')) {
+	            this.nextToken();
+	        }
+	        return this.finalize(node, new Node.DoWhileStatement(body, test));
+	    };
+	    // ECMA-262 13.7.3 The while Statement
+	    Parser.prototype.parseWhileStatement = function () {
+	        var node = this.createNode();
+	        var body;
+	        this.expectKeyword('while');
+	        this.expect('(');
+	        var test = this.parseExpression();
+	        if (!this.match(')') && this.config.tolerant) {
+	            this.tolerateUnexpectedToken(this.nextToken());
+	            body = this.finalize(this.createNode(), new Node.EmptyStatement());
+	        }
+	        else {
+	            this.expect(')');
+	            var previousInIteration = this.context.inIteration;
+	            this.context.inIteration = true;
+	            body = this.parseStatement();
+	            this.context.inIteration = previousInIteration;
+	        }
+	        return this.finalize(node, new Node.WhileStatement(test, body));
+	    };
+	    // ECMA-262 13.7.4 The for Statement
+	    // ECMA-262 13.7.5 The for-in and for-of Statements
+	    Parser.prototype.parseForStatement = function () {
+	        var init = null;
+	        var test = null;
+	        var update = null;
+	        var forIn = true;
+	        var left, right;
+	        var node = this.createNode();
+	        this.expectKeyword('for');
+	        this.expect('(');
+	        if (this.match(';')) {
+	            this.nextToken();
+	        }
+	        else {
+	            if (this.matchKeyword('var')) {
+	                init = this.createNode();
+	                this.nextToken();
+	                var previousAllowIn = this.context.allowIn;
+	                this.context.allowIn = false;
+	                var declarations = this.parseVariableDeclarationList({ inFor: true });
+	                this.context.allowIn = previousAllowIn;
+	                if (declarations.length === 1 && this.matchKeyword('in')) {
+	                    var decl = declarations[0];
+	                    if (decl.init && (decl.id.type === syntax_1.Syntax.ArrayPattern || decl.id.type === syntax_1.Syntax.ObjectPattern || this.context.strict)) {
+	                        this.tolerateError(messages_1.Messages.ForInOfLoopInitializer, 'for-in');
+	                    }
+	                    init = this.finalize(init, new Node.VariableDeclaration(declarations, 'var'));
+	                    this.nextToken();
+	                    left = init;
+	                    right = this.parseExpression();
+	                    init = null;
+	                }
+	                else if (declarations.length === 1 && declarations[0].init === null && this.matchContextualKeyword('of')) {
+	                    init = this.finalize(init, new Node.VariableDeclaration(declarations, 'var'));
+	                    this.nextToken();
+	                    left = init;
+	                    right = this.parseAssignmentExpression();
+	                    init = null;
+	                    forIn = false;
+	                }
+	                else {
+	                    init = this.finalize(init, new Node.VariableDeclaration(declarations, 'var'));
+	                    this.expect(';');
+	                }
+	            }
+	            else if (this.matchKeyword('const') || this.matchKeyword('let')) {
+	                init = this.createNode();
+	                var kind = this.nextToken().value;
+	                if (!this.context.strict && this.lookahead.value === 'in') {
+	                    init = this.finalize(init, new Node.Identifier(kind));
+	                    this.nextToken();
+	                    left = init;
+	                    right = this.parseExpression();
+	                    init = null;
+	                }
+	                else {
+	                    var previousAllowIn = this.context.allowIn;
+	                    this.context.allowIn = false;
+	                    var declarations = this.parseBindingList(kind, { inFor: true });
+	                    this.context.allowIn = previousAllowIn;
+	                    if (declarations.length === 1 && declarations[0].init === null && this.matchKeyword('in')) {
+	                        init = this.finalize(init, new Node.VariableDeclaration(declarations, kind));
+	                        this.nextToken();
+	                        left = init;
+	                        right = this.parseExpression();
+	                        init = null;
+	                    }
+	                    else if (declarations.length === 1 && declarations[0].init === null && this.matchContextualKeyword('of')) {
+	                        init = this.finalize(init, new Node.VariableDeclaration(declarations, kind));
+	                        this.nextToken();
+	                        left = init;
+	                        right = this.parseAssignmentExpression();
+	                        init = null;
+	                        forIn = false;
+	                    }
+	                    else {
+	                        this.consumeSemicolon();
+	                        init = this.finalize(init, new Node.VariableDeclaration(declarations, kind));
+	                    }
+	                }
+	            }
+	            else {
+	                var initStartToken = this.lookahead;
+	                var previousAllowIn = this.context.allowIn;
+	                this.context.allowIn = false;
+	                init = this.inheritCoverGrammar(this.parseAssignmentExpression);
+	                this.context.allowIn = previousAllowIn;
+	                if (this.matchKeyword('in')) {
+	                    if (!this.context.isAssignmentTarget || init.type === syntax_1.Syntax.AssignmentExpression) {
+	                        this.tolerateError(messages_1.Messages.InvalidLHSInForIn);
+	                    }
+	                    this.nextToken();
+	                    this.reinterpretExpressionAsPattern(init);
+	                    left = init;
+	                    right = this.parseExpression();
+	                    init = null;
+	                }
+	                else if (this.matchContextualKeyword('of')) {
+	                    if (!this.context.isAssignmentTarget || init.type === syntax_1.Syntax.AssignmentExpression) {
+	                        this.tolerateError(messages_1.Messages.InvalidLHSInForLoop);
+	                    }
+	                    this.nextToken();
+	                    this.reinterpretExpressionAsPattern(init);
+	                    left = init;
+	                    right = this.parseAssignmentExpression();
+	                    init = null;
+	                    forIn = false;
+	                }
+	                else {
+	                    if (this.match(',')) {
+	                        var initSeq = [init];
+	                        while (this.match(',')) {
+	                            this.nextToken();
+	                            initSeq.push(this.isolateCoverGrammar(this.parseAssignmentExpression));
+	                        }
+	                        init = this.finalize(this.startNode(initStartToken), new Node.SequenceExpression(initSeq));
+	                    }
+	                    this.expect(';');
+	                }
+	            }
+	        }
+	        if (typeof left === 'undefined') {
+	            if (!this.match(';')) {
+	                test = this.parseExpression();
+	            }
+	            this.expect(';');
+	            if (!this.match(')')) {
+	                update = this.parseExpression();
+	            }
+	        }
+	        var body;
+	        if (!this.match(')') && this.config.tolerant) {
+	            this.tolerateUnexpectedToken(this.nextToken());
+	            body = this.finalize(this.createNode(), new Node.EmptyStatement());
+	        }
+	        else {
+	            this.expect(')');
+	            var previousInIteration = this.context.inIteration;
+	            this.context.inIteration = true;
+	            body = this.isolateCoverGrammar(this.parseStatement);
+	            this.context.inIteration = previousInIteration;
+	        }
+	        return (typeof left === 'undefined') ?
+	            this.finalize(node, new Node.ForStatement(init, test, update, body)) :
+	            forIn ? this.finalize(node, new Node.ForInStatement(left, right, body)) :
+	                this.finalize(node, new Node.ForOfStatement(left, right, body));
+	    };
+	    // ECMA-262 13.8 The continue statement
+	    Parser.prototype.parseContinueStatement = function () {
+	        var node = this.createNode();
+	        this.expectKeyword('continue');
+	        var label = null;
+	        if (this.lookahead.type === token_1.Token.Identifier && !this.hasLineTerminator) {
+	            var id = this.parseVariableIdentifier();
+	            label = id;
+	            var key = '$' + id.name;
+	            if (!Object.prototype.hasOwnProperty.call(this.context.labelSet, key)) {
+	                this.throwError(messages_1.Messages.UnknownLabel, id.name);
+	            }
+	        }
+	        this.consumeSemicolon();
+	        if (label === null && !this.context.inIteration) {
+	            this.throwError(messages_1.Messages.IllegalContinue);
+	        }
+	        return this.finalize(node, new Node.ContinueStatement(label));
+	    };
+	    // ECMA-262 13.9 The break statement
+	    Parser.prototype.parseBreakStatement = function () {
+	        var node = this.createNode();
+	        this.expectKeyword('break');
+	        var label = null;
+	        if (this.lookahead.type === token_1.Token.Identifier && !this.hasLineTerminator) {
+	            var id = this.parseVariableIdentifier();
+	            var key = '$' + id.name;
+	            if (!Object.prototype.hasOwnProperty.call(this.context.labelSet, key)) {
+	                this.throwError(messages_1.Messages.UnknownLabel, id.name);
+	            }
+	            label = id;
+	        }
+	        this.consumeSemicolon();
+	        if (label === null && !this.context.inIteration && !this.context.inSwitch) {
+	            this.throwError(messages_1.Messages.IllegalBreak);
+	        }
+	        return this.finalize(node, new Node.BreakStatement(label));
+	    };
+	    // ECMA-262 13.10 The return statement
+	    Parser.prototype.parseReturnStatement = function () {
+	        if (!this.context.inFunctionBody) {
+	            this.tolerateError(messages_1.Messages.IllegalReturn);
+	        }
+	        var node = this.createNode();
+	        this.expectKeyword('return');
+	        var hasArgument = !this.match(';') && !this.match('}') &&
+	            !this.hasLineTerminator && this.lookahead.type !== token_1.Token.EOF;
+	        var argument = hasArgument ? this.parseExpression() : null;
+	        this.consumeSemicolon();
+	        return this.finalize(node, new Node.ReturnStatement(argument));
+	    };
+	    // ECMA-262 13.11 The with statement
+	    Parser.prototype.parseWithStatement = function () {
+	        if (this.context.strict) {
+	            this.tolerateError(messages_1.Messages.StrictModeWith);
+	        }
+	        var node = this.createNode();
+	        this.expectKeyword('with');
+	        this.expect('(');
+	        var object = this.parseExpression();
+	        this.expect(')');
+	        var body = this.parseStatement();
+	        return this.finalize(node, new Node.WithStatement(object, body));
+	    };
+	    // ECMA-262 13.12 The switch statement
+	    Parser.prototype.parseSwitchCase = function () {
+	        var node = this.createNode();
+	        var test;
+	        if (this.matchKeyword('default')) {
+	            this.nextToken();
+	            test = null;
+	        }
+	        else {
+	            this.expectKeyword('case');
+	            test = this.parseExpression();
+	        }
+	        this.expect(':');
+	        var consequent = [];
+	        while (true) {
+	            if (this.match('}') || this.matchKeyword('default') || this.matchKeyword('case')) {
+	                break;
+	            }
+	            consequent.push(this.parseStatementListItem());
+	        }
+	        return this.finalize(node, new Node.SwitchCase(test, consequent));
+	    };
+	    Parser.prototype.parseSwitchStatement = function () {
+	        var node = this.createNode();
+	        this.expectKeyword('switch');
+	        this.expect('(');
+	        var discriminant = this.parseExpression();
+	        this.expect(')');
+	        var previousInSwitch = this.context.inSwitch;
+	        this.context.inSwitch = true;
+	        var cases = [];
+	        var defaultFound = false;
+	        this.expect('{');
+	        while (true) {
+	            if (this.match('}')) {
+	                break;
+	            }
+	            var clause = this.parseSwitchCase();
+	            if (clause.test === null) {
+	                if (defaultFound) {
+	                    this.throwError(messages_1.Messages.MultipleDefaultsInSwitch);
+	                }
+	                defaultFound = true;
+	            }
+	            cases.push(clause);
+	        }
+	        this.expect('}');
+	        this.context.inSwitch = previousInSwitch;
+	        return this.finalize(node, new Node.SwitchStatement(discriminant, cases));
+	    };
+	    // ECMA-262 13.13 Labelled Statements
+	    Parser.prototype.parseLabelledStatement = function () {
+	        var node = this.createNode();
+	        var expr = this.parseExpression();
+	        var statement;
+	        if ((expr.type === syntax_1.Syntax.Identifier) && this.match(':')) {
+	            this.nextToken();
+	            var id = (expr);
+	            var key = '$' + id.name;
+	            if (Object.prototype.hasOwnProperty.call(this.context.labelSet, key)) {
+	                this.throwError(messages_1.Messages.Redeclaration, 'Label', id.name);
+	            }
+	            this.context.labelSet[key] = true;
+	            var labeledBody = this.parseStatement();
+	            delete this.context.labelSet[key];
+	            statement = new Node.LabeledStatement(id, labeledBody);
+	        }
+	        else {
+	            this.consumeSemicolon();
+	            statement = new Node.ExpressionStatement(expr);
+	        }
+	        return this.finalize(node, statement);
+	    };
+	    // ECMA-262 13.14 The throw statement
+	    Parser.prototype.parseThrowStatement = function () {
+	        var node = this.createNode();
+	        this.expectKeyword('throw');
+	        if (this.hasLineTerminator) {
+	            this.throwError(messages_1.Messages.NewlineAfterThrow);
+	        }
+	        var argument = this.parseExpression();
+	        this.consumeSemicolon();
+	        return this.finalize(node, new Node.ThrowStatement(argument));
+	    };
+	    // ECMA-262 13.15 The try statement
+	    Parser.prototype.parseCatchClause = function () {
+	        var node = this.createNode();
+	        this.expectKeyword('catch');
+	        this.expect('(');
+	        if (this.match(')')) {
+	            this.throwUnexpectedToken(this.lookahead);
+	        }
+	        var params = [];
+	        var param = this.parsePattern(params);
+	        var paramMap = {};
+	        for (var i = 0; i < params.length; i++) {
+	            var key = '$' + params[i].value;
+	            if (Object.prototype.hasOwnProperty.call(paramMap, key)) {
+	                this.tolerateError(messages_1.Messages.DuplicateBinding, params[i].value);
+	            }
+	            paramMap[key] = true;
+	        }
+	        if (this.context.strict && param.type === syntax_1.Syntax.Identifier) {
+	            if (this.scanner.isRestrictedWord((param).name)) {
+	                this.tolerateError(messages_1.Messages.StrictCatchVariable);
+	            }
+	        }
+	        this.expect(')');
+	        var body = this.parseBlock();
+	        return this.finalize(node, new Node.CatchClause(param, body));
+	    };
+	    Parser.prototype.parseFinallyClause = function () {
+	        this.expectKeyword('finally');
+	        return this.parseBlock();
+	    };
+	    Parser.prototype.parseTryStatement = function () {
+	        var node = this.createNode();
+	        this.expectKeyword('try');
+	        var block = this.parseBlock();
+	        var handler = this.matchKeyword('catch') ? this.parseCatchClause() : null;
+	        var finalizer = this.matchKeyword('finally') ? this.parseFinallyClause() : null;
+	        if (!handler && !finalizer) {
+	            this.throwError(messages_1.Messages.NoCatchOrFinally);
+	        }
+	        return this.finalize(node, new Node.TryStatement(block, handler, finalizer));
+	    };
+	    // ECMA-262 13.16 The debugger statement
+	    Parser.prototype.parseDebuggerStatement = function () {
+	        var node = this.createNode();
+	        this.expectKeyword('debugger');
+	        this.consumeSemicolon();
+	        return this.finalize(node, new Node.DebuggerStatement());
+	    };
+	    // ECMA-262 13 Statements
+	    Parser.prototype.parseStatement = function () {
+	        var statement;
+	        switch (this.lookahead.type) {
+	            case token_1.Token.BooleanLiteral:
+	            case token_1.Token.NullLiteral:
+	            case token_1.Token.NumericLiteral:
+	            case token_1.Token.StringLiteral:
+	            case token_1.Token.Template:
+	            case token_1.Token.RegularExpression:
+	                statement = this.parseExpressionStatement();
+	                break;
+	            case token_1.Token.Punctuator:
+	                var value = this.lookahead.value;
+	                if (value === '{') {
+	                    statement = this.parseBlock();
+	                }
+	                else if (value === '(') {
+	                    statement = this.parseExpressionStatement();
+	                }
+	                else if (value === ';') {
+	                    statement = this.parseEmptyStatement();
+	                }
+	                else {
+	                    statement = this.parseExpressionStatement();
+	                }
+	                break;
+	            case token_1.Token.Identifier:
+	                statement = this.matchAsyncFunction() ? this.parseFunctionDeclaration() : this.parseLabelledStatement();
+	                break;
+	            case token_1.Token.Keyword:
+	                switch (this.lookahead.value) {
+	                    case 'break':
+	                        statement = this.parseBreakStatement();
+	                        break;
+	                    case 'continue':
+	                        statement = this.parseContinueStatement();
+	                        break;
+	                    case 'debugger':
+	                        statement = this.parseDebuggerStatement();
+	                        break;
+	                    case 'do':
+	                        statement = this.parseDoWhileStatement();
+	                        break;
+	                    case 'for':
+	                        statement = this.parseForStatement();
+	                        break;
+	                    case 'function':
+	                        statement = this.parseFunctionDeclaration();
+	                        break;
+	                    case 'if':
+	                        statement = this.parseIfStatement();
+	                        break;
+	                    case 'return':
+	                        statement = this.parseReturnStatement();
+	                        break;
+	                    case 'switch':
+	                        statement = this.parseSwitchStatement();
+	                        break;
+	                    case 'throw':
+	                        statement = this.parseThrowStatement();
+	                        break;
+	                    case 'try':
+	                        statement = this.parseTryStatement();
+	                        break;
+	                    case 'var':
+	                        statement = this.parseVariableStatement();
+	                        break;
+	                    case 'while':
+	                        statement = this.parseWhileStatement();
+	                        break;
+	                    case 'with':
+	                        statement = this.parseWithStatement();
+	                        break;
+	                    default:
+	                        statement = this.parseExpressionStatement();
+	                        break;
+	                }
+	                break;
+	            default:
+	                statement = this.throwUnexpectedToken(this.lookahead);
+	        }
+	        return statement;
+	    };
+	    // ECMA-262 14.1 Function Definition
+	    Parser.prototype.parseFunctionSourceElements = function () {
+	        var node = this.createNode();
+	        this.expect('{');
+	        var body = this.parseDirectivePrologues();
+	        var previousLabelSet = this.context.labelSet;
+	        var previousInIteration = this.context.inIteration;
+	        var previousInSwitch = this.context.inSwitch;
+	        var previousInFunctionBody = this.context.inFunctionBody;
+	        this.context.labelSet = {};
+	        this.context.inIteration = false;
+	        this.context.inSwitch = false;
+	        this.context.inFunctionBody = true;
+	        while (this.startMarker.index < this.scanner.length) {
+	            if (this.match('}')) {
+	                break;
+	            }
+	            body.push(this.parseStatementListItem());
+	        }
+	        this.expect('}');
+	        this.context.labelSet = previousLabelSet;
+	        this.context.inIteration = previousInIteration;
+	        this.context.inSwitch = previousInSwitch;
+	        this.context.inFunctionBody = previousInFunctionBody;
+	        return this.finalize(node, new Node.BlockStatement(body));
+	    };
+	    Parser.prototype.validateParam = function (options, param, name) {
+	        var key = '$' + name;
+	        if (this.context.strict) {
+	            if (this.scanner.isRestrictedWord(name)) {
+	                options.stricted = param;
+	                options.message = messages_1.Messages.StrictParamName;
+	            }
+	            if (Object.prototype.hasOwnProperty.call(options.paramSet, key)) {
+	                options.stricted = param;
+	                options.message = messages_1.Messages.StrictParamDupe;
+	            }
+	        }
+	        else if (!options.firstRestricted) {
+	            if (this.scanner.isRestrictedWord(name)) {
+	                options.firstRestricted = param;
+	                options.message = messages_1.Messages.StrictParamName;
+	            }
+	            else if (this.scanner.isStrictModeReservedWord(name)) {
+	                options.firstRestricted = param;
+	                options.message = messages_1.Messages.StrictReservedWord;
+	            }
+	            else if (Object.prototype.hasOwnProperty.call(options.paramSet, key)) {
+	                options.stricted = param;
+	                options.message = messages_1.Messages.StrictParamDupe;
+	            }
+	        }
+	        /* istanbul ignore next */
+	        if (typeof Object.defineProperty === 'function') {
+	            Object.defineProperty(options.paramSet, key, { value: true, enumerable: true, writable: true, configurable: true });
+	        }
+	        else {
+	            options.paramSet[key] = true;
+	        }
+	    };
+	    Parser.prototype.parseRestElement = function (params) {
+	        var node = this.createNode();
+	        this.nextToken();
+	        if (this.match('{')) {
+	            this.throwError(messages_1.Messages.ObjectPatternAsRestParameter);
+	        }
+	        params.push(this.lookahead);
+	        var param = this.parseVariableIdentifier();
+	        if (this.match('=')) {
+	            this.throwError(messages_1.Messages.DefaultRestParameter);
+	        }
+	        if (!this.match(')')) {
+	            this.throwError(messages_1.Messages.ParameterAfterRestParameter);
+	        }
+	        return this.finalize(node, new Node.RestElement(param));
+	    };
+	    Parser.prototype.parseFormalParameter = function (options) {
+	        var param;
+	        var params = [];
+	        var token = this.lookahead;
+	        if (token.value === '...') {
+	            param = this.parseRestElement(params);
+	            this.validateParam(options, param.argument, param.argument.name);
+	            options.params.push(param);
+	            return;
+	        }
+	        param = this.parsePatternWithDefault(params);
+	        for (var i = 0; i < params.length; i++) {
+	            this.validateParam(options, params[i], params[i].value);
+	        }
+	        options.params.push(param);
+	    };
+	    Parser.prototype.parseFormalParameters = function (firstRestricted) {
+	        var options;
+	        options = {
+	            params: [],
+	            firstRestricted: firstRestricted
+	        };
+	        this.expect('(');
+	        if (!this.match(')')) {
+	            options.paramSet = {};
+	            while (this.startMarker.index < this.scanner.length) {
+	                this.parseFormalParameter(options);
+	                if (this.match(')')) {
+	                    break;
+	                }
+	                this.expect(',');
+	                if (this.match(')')) {
+	                    break;
+	                }
+	            }
+	        }
+	        this.expect(')');
+	        return {
+	            params: options.params,
+	            stricted: options.stricted,
+	            firstRestricted: options.firstRestricted,
+	            message: options.message
+	        };
+	    };
+	    Parser.prototype.matchAsyncFunction = function () {
+	        var match = this.matchContextualKeyword('async');
+	        if (match) {
+	            var previousIndex = this.scanner.index;
+	            var previousLineNumber = this.scanner.lineNumber;
+	            var previousLineStart = this.scanner.lineStart;
+	            this.collectComments();
+	            var next = this.scanner.lex();
+	            this.scanner.index = previousIndex;
+	            this.scanner.lineNumber = previousLineNumber;
+	            this.scanner.lineStart = previousLineStart;
+	            match = (previousLineNumber === next.lineNumber) && ((next.type === token_1.Token.Keyword) || (next.value === 'function'));
+	        }
+	        return match;
+	    };
+	    Parser.prototype.parseFunctionDeclaration = function (identifierIsOptional) {
+	        var node = this.createNode();
+	        var isAsync = this.matchContextualKeyword('async');
+	        if (isAsync) {
+	            this.nextToken();
+	        }
+	        this.expectKeyword('function');
+	        var isGenerator = isAsync ? false : this.match('*');
+	        if (isGenerator) {
+	            this.nextToken();
+	        }
+	        var message;
+	        var id = null;
+	        var firstRestricted = null;
+	        if (!identifierIsOptional || !this.match('(')) {
+	            var token = this.lookahead;
+	            id = this.parseVariableIdentifier();
+	            if (this.context.strict) {
+	                if (this.scanner.isRestrictedWord(token.value)) {
+	                    this.tolerateUnexpectedToken(token, messages_1.Messages.StrictFunctionName);
+	                }
+	            }
+	            else {
+	                if (this.scanner.isRestrictedWord(token.value)) {
+	                    firstRestricted = token;
+	                    message = messages_1.Messages.StrictFunctionName;
+	                }
+	                else if (this.scanner.isStrictModeReservedWord(token.value)) {
+	                    firstRestricted = token;
+	                    message = messages_1.Messages.StrictReservedWord;
+	                }
+	            }
+	        }
+	        var previousAllowAwait = this.context.await;
+	        var previousAllowYield = this.context.allowYield;
+	        this.context.await = isAsync;
+	        this.context.allowYield = !isGenerator;
+	        var formalParameters = this.parseFormalParameters(firstRestricted);
+	        var params = formalParameters.params;
+	        var stricted = formalParameters.stricted;
+	        firstRestricted = formalParameters.firstRestricted;
+	        if (formalParameters.message) {
+	            message = formalParameters.message;
+	        }
+	        var previousStrict = this.context.strict;
+	        var body = this.parseFunctionSourceElements();
+	        if (this.context.strict && firstRestricted) {
+	            this.throwUnexpectedToken(firstRestricted, message);
+	        }
+	        if (this.context.strict && stricted) {
+	            this.tolerateUnexpectedToken(stricted, message);
+	        }
+	        this.context.strict = previousStrict;
+	        this.context.await = previousAllowAwait;
+	        this.context.allowYield = previousAllowYield;
+	        return isAsync ? this.finalize(node, new Node.AsyncFunctionDeclaration(id, params, body)) :
+	            this.finalize(node, new Node.FunctionDeclaration(id, params, body, isGenerator));
+	    };
+	    Parser.prototype.parseFunctionExpression = function () {
+	        var node = this.createNode();
+	        var isAsync = this.matchContextualKeyword('async');
+	        if (isAsync) {
+	            this.nextToken();
+	        }
+	        this.expectKeyword('function');
+	        var isGenerator = isAsync ? false : this.match('*');
+	        if (isGenerator) {
+	            this.nextToken();
+	        }
+	        var message;
+	        var id = null;
+	        var firstRestricted;
+	        var previousAllowAwait = this.context.await;
+	        var previousAllowYield = this.context.allowYield;
+	        this.context.await = isAsync;
+	        this.context.allowYield = !isGenerator;
+	        if (!this.match('(')) {
+	            var token = this.lookahead;
+	            id = (!this.context.strict && !isGenerator && this.matchKeyword('yield')) ? this.parseIdentifierName() : this.parseVariableIdentifier();
+	            if (this.context.strict) {
+	                if (this.scanner.isRestrictedWord(token.value)) {
+	                    this.tolerateUnexpectedToken(token, messages_1.Messages.StrictFunctionName);
+	                }
+	            }
+	            else {
+	                if (this.scanner.isRestrictedWord(token.value)) {
+	                    firstRestricted = token;
+	                    message = messages_1.Messages.StrictFunctionName;
+	                }
+	                else if (this.scanner.isStrictModeReservedWord(token.value)) {
+	                    firstRestricted = token;
+	                    message = messages_1.Messages.StrictReservedWord;
+	                }
+	            }
+	        }
+	        var formalParameters = this.parseFormalParameters(firstRestricted);
+	        var params = formalParameters.params;
+	        var stricted = formalParameters.stricted;
+	        firstRestricted = formalParameters.firstRestricted;
+	        if (formalParameters.message) {
+	            message = formalParameters.message;
+	        }
+	        var previousStrict = this.context.strict;
+	        var body = this.parseFunctionSourceElements();
+	        if (this.context.strict && firstRestricted) {
+	            this.throwUnexpectedToken(firstRestricted, message);
+	        }
+	        if (this.context.strict && stricted) {
+	            this.tolerateUnexpectedToken(stricted, message);
+	        }
+	        this.context.strict = previousStrict;
+	        this.context.await = previousAllowAwait;
+	        this.context.allowYield = previousAllowYield;
+	        return isAsync ? this.finalize(node, new Node.AsyncFunctionExpression(id, params, body)) :
+	            this.finalize(node, new Node.FunctionExpression(id, params, body, isGenerator));
+	    };
+	    // ECMA-262 14.1.1 Directive Prologues
+	    Parser.prototype.parseDirective = function () {
+	        var token = this.lookahead;
+	        var node = this.createNode();
+	        var expr = this.parseExpression();
+	        var directive = (expr.type === syntax_1.Syntax.Literal) ? this.getTokenRaw(token).slice(1, -1) : null;
+	        this.consumeSemicolon();
+	        return this.finalize(node, directive ? new Node.Directive(expr, directive) : new Node.ExpressionStatement(expr));
+	    };
+	    Parser.prototype.parseDirectivePrologues = function () {
+	        var firstRestricted = null;
+	        var body = [];
+	        while (true) {
+	            var token = this.lookahead;
+	            if (token.type !== token_1.Token.StringLiteral) {
+	                break;
+	            }
+	            var statement = this.parseDirective();
+	            body.push(statement);
+	            var directive = statement.directive;
+	            if (typeof directive !== 'string') {
+	                break;
+	            }
+	            if (directive === 'use strict') {
+	                this.context.strict = true;
+	                if (firstRestricted) {
+	                    this.tolerateUnexpectedToken(firstRestricted, messages_1.Messages.StrictOctalLiteral);
+	                }
+	            }
+	            else {
+	                if (!firstRestricted && token.octal) {
+	                    firstRestricted = token;
+	                }
+	            }
+	        }
+	        return body;
+	    };
+	    // ECMA-262 14.3 Method Definitions
+	    Parser.prototype.qualifiedPropertyName = function (token) {
+	        switch (token.type) {
+	            case token_1.Token.Identifier:
+	            case token_1.Token.StringLiteral:
+	            case token_1.Token.BooleanLiteral:
+	            case token_1.Token.NullLiteral:
+	            case token_1.Token.NumericLiteral:
+	            case token_1.Token.Keyword:
+	                return true;
+	            case token_1.Token.Punctuator:
+	                return token.value === '[';
+	        }
+	        return false;
+	    };
+	    Parser.prototype.parseGetterMethod = function () {
+	        var node = this.createNode();
+	        this.expect('(');
+	        this.expect(')');
+	        var isGenerator = false;
+	        var params = {
+	            params: [],
+	            stricted: null,
+	            firstRestricted: null,
+	            message: null
+	        };
+	        var previousAllowYield = this.context.allowYield;
+	        this.context.allowYield = false;
+	        var method = this.parsePropertyMethod(params);
+	        this.context.allowYield = previousAllowYield;
+	        return this.finalize(node, new Node.FunctionExpression(null, params.params, method, isGenerator));
+	    };
+	    Parser.prototype.parseSetterMethod = function () {
+	        var node = this.createNode();
+	        var options = {
+	            params: [],
+	            firstRestricted: null,
+	            paramSet: {}
+	        };
+	        var isGenerator = false;
+	        var previousAllowYield = this.context.allowYield;
+	        this.context.allowYield = false;
+	        this.expect('(');
+	        if (this.match(')')) {
+	            this.tolerateUnexpectedToken(this.lookahead);
+	        }
+	        else {
+	            this.parseFormalParameter(options);
+	        }
+	        this.expect(')');
+	        var method = this.parsePropertyMethod(options);
+	        this.context.allowYield = previousAllowYield;
+	        return this.finalize(node, new Node.FunctionExpression(null, options.params, method, isGenerator));
+	    };
+	    Parser.prototype.parseGeneratorMethod = function () {
+	        var node = this.createNode();
+	        var isGenerator = true;
+	        var previousAllowYield = this.context.allowYield;
+	        this.context.allowYield = true;
+	        var params = this.parseFormalParameters();
+	        this.context.allowYield = false;
+	        var method = this.parsePropertyMethod(params);
+	        this.context.allowYield = previousAllowYield;
+	        return this.finalize(node, new Node.FunctionExpression(null, params.params, method, isGenerator));
+	    };
+	    // ECMA-262 14.4 Generator Function Definitions
+	    Parser.prototype.parseYieldExpression = function () {
+	        var node = this.createNode();
+	        this.expectKeyword('yield');
+	        var argument = null;
+	        var delegate = false;
+	        if (!this.hasLineTerminator) {
+	            var previousAllowYield = this.context.allowYield;
+	            this.context.allowYield = false;
+	            delegate = this.match('*');
+	            if (delegate) {
+	                this.nextToken();
+	                argument = this.parseAssignmentExpression();
+	            }
+	            else {
+	                if (!this.match(';') && !this.match('}') && !this.match(')') && this.lookahead.type !== token_1.Token.EOF) {
+	                    argument = this.parseAssignmentExpression();
+	                }
+	            }
+	            this.context.allowYield = previousAllowYield;
+	        }
+	        return this.finalize(node, new Node.YieldExpression(argument, delegate));
+	    };
+	    // ECMA-262 14.5 Class Definitions
+	    Parser.prototype.parseClassElement = function (hasConstructor) {
+	        var token = this.lookahead;
+	        var node = this.createNode();
+	        var kind = '';
+	        var key = null;
+	        var value = null;
+	        var computed = false;
+	        var method = false;
+	        var isStatic = false;
+	        var isAsync = false;
+	        if (this.match('*')) {
+	            this.nextToken();
+	        }
+	        else {
+	            computed = this.match('[');
+	            key = this.parseObjectPropertyKey();
+	            var id = key;
+	            if (id.name === 'static' && (this.qualifiedPropertyName(this.lookahead) || this.match('*'))) {
+	                token = this.lookahead;
+	                isStatic = true;
+	                computed = this.match('[');
+	                if (this.match('*')) {
+	                    this.nextToken();
+	                }
+	                else {
+	                    key = this.parseObjectPropertyKey();
+	                }
+	            }
+	            isAsync = (token.type === token_1.Token.Identifier) && !this.hasLineTerminator && (this.lookahead.type === token_1.Token.Identifier) && (token.value === 'async');
+	            if (isAsync) {
+	                token = this.lookahead;
+	                key = this.parseObjectPropertyKey();
+	                if (token.type === token_1.Token.Identifier && ['get', 'set', 'constructor'].indexOf(token.value) >= 0) {
+	                    this.tolerateUnexpectedToken(token);
+	                }
+	            }
+	        }
+	        var lookaheadPropertyKey = this.qualifiedPropertyName(this.lookahead);
+	        if (token.type === token_1.Token.Identifier) {
+	            if (token.value === 'get' && lookaheadPropertyKey) {
+	                kind = 'get';
+	                computed = this.match('[');
+	                key = this.parseObjectPropertyKey();
+	                this.context.allowYield = false;
+	                value = this.parseGetterMethod();
+	            }
+	            else if (token.value === 'set' && lookaheadPropertyKey) {
+	                kind = 'set';
+	                computed = this.match('[');
+	                key = this.parseObjectPropertyKey();
+	                value = this.parseSetterMethod();
+	            }
+	        }
+	        else if (token.type === token_1.Token.Punctuator && token.value === '*' && lookaheadPropertyKey) {
+	            kind = 'init';
+	            computed = this.match('[');
+	            key = this.parseObjectPropertyKey();
+	            value = this.parseGeneratorMethod();
+	            method = true;
+	        }
+	        if (!kind && key && this.match('(')) {
+	            kind = 'init';
+	            value = isAsync ? this.parsePropertyMethodAsyncFunction() : this.parsePropertyMethodFunction();
+	            method = true;
+	        }
+	        if (!kind) {
+	            this.throwUnexpectedToken(this.lookahead);
+	        }
+	        if (kind === 'init') {
+	            kind = 'method';
+	        }
+	        if (!computed) {
+	            if (isStatic && this.isPropertyKey(key, 'prototype')) {
+	                this.throwUnexpectedToken(token, messages_1.Messages.StaticPrototype);
+	            }
+	            if (!isStatic && this.isPropertyKey(key, 'constructor')) {
+	                if (kind !== 'method' || !method || (value && value.generator)) {
+	                    this.throwUnexpectedToken(token, messages_1.Messages.ConstructorSpecialMethod);
+	                }
+	                if (hasConstructor.value) {
+	                    this.throwUnexpectedToken(token, messages_1.Messages.DuplicateConstructor);
+	                }
+	                else {
+	                    hasConstructor.value = true;
+	                }
+	                kind = 'constructor';
+	            }
+	        }
+	        return this.finalize(node, new Node.MethodDefinition(key, computed, value, kind, isStatic));
+	    };
+	    Parser.prototype.parseClassElementList = function () {
+	        var body = [];
+	        var hasConstructor = { value: false };
+	        this.expect('{');
+	        while (!this.match('}')) {
+	            if (this.match(';')) {
+	                this.nextToken();
+	            }
+	            else {
+	                body.push(this.parseClassElement(hasConstructor));
+	            }
+	        }
+	        this.expect('}');
+	        return body;
+	    };
+	    Parser.prototype.parseClassBody = function () {
+	        var node = this.createNode();
+	        var elementList = this.parseClassElementList();
+	        return this.finalize(node, new Node.ClassBody(elementList));
+	    };
+	    Parser.prototype.parseClassDeclaration = function (identifierIsOptional) {
+	        var node = this.createNode();
+	        var previousStrict = this.context.strict;
+	        this.context.strict = true;
+	        this.expectKeyword('class');
+	        var id = (identifierIsOptional && (this.lookahead.type !== token_1.Token.Identifier)) ? null : this.parseVariableIdentifier();
+	        var superClass = null;
+	        if (this.matchKeyword('extends')) {
+	            this.nextToken();
+	            superClass = this.isolateCoverGrammar(this.parseLeftHandSideExpressionAllowCall);
+	        }
+	        var classBody = this.parseClassBody();
+	        this.context.strict = previousStrict;
+	        return this.finalize(node, new Node.ClassDeclaration(id, superClass, classBody));
+	    };
+	    Parser.prototype.parseClassExpression = function () {
+	        var node = this.createNode();
+	        var previousStrict = this.context.strict;
+	        this.context.strict = true;
+	        this.expectKeyword('class');
+	        var id = (this.lookahead.type === token_1.Token.Identifier) ? this.parseVariableIdentifier() : null;
+	        var superClass = null;
+	        if (this.matchKeyword('extends')) {
+	            this.nextToken();
+	            superClass = this.isolateCoverGrammar(this.parseLeftHandSideExpressionAllowCall);
+	        }
+	        var classBody = this.parseClassBody();
+	        this.context.strict = previousStrict;
+	        return this.finalize(node, new Node.ClassExpression(id, superClass, classBody));
+	    };
+	    // ECMA-262 15.1 Scripts
+	    // ECMA-262 15.2 Modules
+	    Parser.prototype.parseModule = function () {
+	        this.context.strict = true;
+	        this.context.isModule = true;
+	        var node = this.createNode();
+	        var body = this.parseDirectivePrologues();
+	        while (this.startMarker.index < this.scanner.length) {
+	            body.push(this.parseStatementListItem());
+	        }
+	        return this.finalize(node, new Node.Module(body));
+	    };
+	    Parser.prototype.parseScript = function () {
+	        var node = this.createNode();
+	        var body = this.parseDirectivePrologues();
+	        while (this.startMarker.index < this.scanner.length) {
+	            body.push(this.parseStatementListItem());
+	        }
+	        return this.finalize(node, new Node.Script(body));
+	    };
+	    // ECMA-262 15.2.2 Imports
+	    Parser.prototype.parseModuleSpecifier = function () {
+	        var node = this.createNode();
+	        if (this.lookahead.type !== token_1.Token.StringLiteral) {
+	            this.throwError(messages_1.Messages.InvalidModuleSpecifier);
+	        }
+	        var token = this.nextToken();
+	        var raw = this.getTokenRaw(token);
+	        return this.finalize(node, new Node.Literal(token.value, raw));
+	    };
+	    // import {<foo as bar>} ...;
+	    Parser.prototype.parseImportSpecifier = function () {
+	        var node = this.createNode();
+	        var imported;
+	        var local;
+	        if (this.lookahead.type === token_1.Token.Identifier) {
+	            imported = this.parseVariableIdentifier();
+	            local = imported;
+	            if (this.matchContextualKeyword('as')) {
+	                this.nextToken();
+	                local = this.parseVariableIdentifier();
+	            }
+	        }
+	        else {
+	            imported = this.parseIdentifierName();
+	            local = imported;
+	            if (this.matchContextualKeyword('as')) {
+	                this.nextToken();
+	                local = this.parseVariableIdentifier();
+	            }
+	            else {
+	                this.throwUnexpectedToken(this.nextToken());
+	            }
+	        }
+	        return this.finalize(node, new Node.ImportSpecifier(local, imported));
+	    };
+	    // {foo, bar as bas}
+	    Parser.prototype.parseNamedImports = function () {
+	        this.expect('{');
+	        var specifiers = [];
+	        while (!this.match('}')) {
+	            specifiers.push(this.parseImportSpecifier());
+	            if (!this.match('}')) {
+	                this.expect(',');
+	            }
+	        }
+	        this.expect('}');
+	        return specifiers;
+	    };
+	    // import <foo> ...;
+	    Parser.prototype.parseImportDefaultSpecifier = function () {
+	        var node = this.createNode();
+	        var local = this.parseIdentifierName();
+	        return this.finalize(node, new Node.ImportDefaultSpecifier(local));
+	    };
+	    // import <* as foo> ...;
+	    Parser.prototype.parseImportNamespaceSpecifier = function () {
+	        var node = this.createNode();
+	        this.expect('*');
+	        if (!this.matchContextualKeyword('as')) {
+	            this.throwError(messages_1.Messages.NoAsAfterImportNamespace);
+	        }
+	        this.nextToken();
+	        var local = this.parseIdentifierName();
+	        return this.finalize(node, new Node.ImportNamespaceSpecifier(local));
+	    };
+	    Parser.prototype.parseImportDeclaration = function () {
+	        if (this.context.inFunctionBody) {
+	            this.throwError(messages_1.Messages.IllegalImportDeclaration);
+	        }
+	        var node = this.createNode();
+	        this.expectKeyword('import');
+	        var src;
+	        var specifiers = [];
+	        if (this.lookahead.type === token_1.Token.StringLiteral) {
+	            // import 'foo';
+	            src = this.parseModuleSpecifier();
+	        }
+	        else {
+	            if (this.match('{')) {
+	                // import {bar}
+	                specifiers = specifiers.concat(this.parseNamedImports());
+	            }
+	            else if (this.match('*')) {
+	                // import * as foo
+	                specifiers.push(this.parseImportNamespaceSpecifier());
+	            }
+	            else if (this.isIdentifierName(this.lookahead) && !this.matchKeyword('default')) {
+	                // import foo
+	                specifiers.push(this.parseImportDefaultSpecifier());
+	                if (this.match(',')) {
+	                    this.nextToken();
+	                    if (this.match('*')) {
+	                        // import foo, * as foo
+	                        specifiers.push(this.parseImportNamespaceSpecifier());
+	                    }
+	                    else if (this.match('{')) {
+	                        // import foo, {bar}
+	                        specifiers = specifiers.concat(this.parseNamedImports());
+	                    }
+	                    else {
+	                        this.throwUnexpectedToken(this.lookahead);
+	                    }
+	                }
+	            }
+	            else {
+	                this.throwUnexpectedToken(this.nextToken());
+	            }
+	            if (!this.matchContextualKeyword('from')) {
+	                var message = this.lookahead.value ? messages_1.Messages.UnexpectedToken : messages_1.Messages.MissingFromClause;
+	                this.throwError(message, this.lookahead.value);
+	            }
+	            this.nextToken();
+	            src = this.parseModuleSpecifier();
+	        }
+	        this.consumeSemicolon();
+	        return this.finalize(node, new Node.ImportDeclaration(specifiers, src));
+	    };
+	    // ECMA-262 15.2.3 Exports
+	    Parser.prototype.parseExportSpecifier = function () {
+	        var node = this.createNode();
+	        var local = this.parseIdentifierName();
+	        var exported = local;
+	        if (this.matchContextualKeyword('as')) {
+	            this.nextToken();
+	            exported = this.parseIdentifierName();
+	        }
+	        return this.finalize(node, new Node.ExportSpecifier(local, exported));
+	    };
+	    Parser.prototype.parseExportDeclaration = function () {
+	        if (this.context.inFunctionBody) {
+	            this.throwError(messages_1.Messages.IllegalExportDeclaration);
+	        }
+	        var node = this.createNode();
+	        this.expectKeyword('export');
+	        var exportDeclaration;
+	        if (this.matchKeyword('default')) {
+	            // export default ...
+	            this.nextToken();
+	            if (this.matchKeyword('function')) {
+	                // export default function foo () {}
+	                // export default function () {}
+	                var declaration = this.parseFunctionDeclaration(true);
+	                exportDeclaration = this.finalize(node, new Node.ExportDefaultDeclaration(declaration));
+	            }
+	            else if (this.matchKeyword('class')) {
+	                // export default class foo {}
+	                var declaration = this.parseClassDeclaration(true);
+	                exportDeclaration = this.finalize(node, new Node.ExportDefaultDeclaration(declaration));
+	            }
+	            else {
+	                if (this.matchContextualKeyword('from')) {
+	                    this.throwError(messages_1.Messages.UnexpectedToken, this.lookahead.value);
+	                }
+	                // export default {};
+	                // export default [];
+	                // export default (1 + 2);
+	                var declaration = this.match('{') ? this.parseObjectInitializer() :
+	                    this.match('[') ? this.parseArrayInitializer() : this.parseAssignmentExpression();
+	                this.consumeSemicolon();
+	                exportDeclaration = this.finalize(node, new Node.ExportDefaultDeclaration(declaration));
+	            }
+	        }
+	        else if (this.match('*')) {
+	            // export * from 'foo';
+	            this.nextToken();
+	            if (!this.matchContextualKeyword('from')) {
+	                var message = this.lookahead.value ? messages_1.Messages.UnexpectedToken : messages_1.Messages.MissingFromClause;
+	                this.throwError(message, this.lookahead.value);
+	            }
+	            this.nextToken();
+	            var src = this.parseModuleSpecifier();
+	            this.consumeSemicolon();
+	            exportDeclaration = this.finalize(node, new Node.ExportAllDeclaration(src));
+	        }
+	        else if (this.lookahead.type === token_1.Token.Keyword) {
+	            // export var f = 1;
+	            var declaration = void 0;
+	            switch (this.lookahead.value) {
+	                case 'let':
+	                case 'const':
+	                    declaration = this.parseLexicalDeclaration({ inFor: false });
+	                    break;
+	                case 'var':
+	                case 'class':
+	                case 'function':
+	                    declaration = this.parseStatementListItem();
+	                    break;
+	                default:
+	                    this.throwUnexpectedToken(this.lookahead);
+	            }
+	            exportDeclaration = this.finalize(node, new Node.ExportNamedDeclaration(declaration, [], null));
+	        }
+	        else if (this.matchAsyncFunction()) {
+	            var declaration = this.parseFunctionDeclaration();
+	            exportDeclaration = this.finalize(node, new Node.ExportNamedDeclaration(declaration, [], null));
+	        }
+	        else {
+	            var specifiers = [];
+	            var source = null;
+	            var isExportFromIdentifier = false;
+	            this.expect('{');
+	            while (!this.match('}')) {
+	                isExportFromIdentifier = isExportFromIdentifier || this.matchKeyword('default');
+	                specifiers.push(this.parseExportSpecifier());
+	                if (!this.match('}')) {
+	                    this.expect(',');
+	                }
+	            }
+	            this.expect('}');
+	            if (this.matchContextualKeyword('from')) {
+	                // export {default} from 'foo';
+	                // export {foo} from 'foo';
+	                this.nextToken();
+	                source = this.parseModuleSpecifier();
+	                this.consumeSemicolon();
+	            }
+	            else if (isExportFromIdentifier) {
+	                // export {default}; // missing fromClause
+	                var message = this.lookahead.value ? messages_1.Messages.UnexpectedToken : messages_1.Messages.MissingFromClause;
+	                this.throwError(message, this.lookahead.value);
+	            }
+	            else {
+	                // export {foo};
+	                this.consumeSemicolon();
+	            }
+	            exportDeclaration = this.finalize(node, new Node.ExportNamedDeclaration(null, specifiers, source));
+	        }
+	        return exportDeclaration;
+	    };
+	    return Parser;
+	}());
+	exports.Parser = Parser;
+
+
+/***/ },
+/* 4 */
+/***/ function(module, exports) {
+
+	// Ensure the condition is true, otherwise throw an error.
+	// This is only to have a better contract semantic, i.e. another safety net
+	// to catch a logic error. The condition shall be fulfilled in normal case.
+	// Do NOT use this to enforce a certain condition on any user input.
+	"use strict";
+	function assert(condition, message) {
+	    /* istanbul ignore if */
+	    if (!condition) {
+	        throw new Error('ASSERT: ' + message);
+	    }
+	}
+	exports.assert = assert;
+
+
+/***/ },
+/* 5 */
+/***/ function(module, exports) {
+
+	"use strict";
+	// Error messages should be identical to V8.
+	exports.Messages = {
+	    UnexpectedToken: 'Unexpected token %0',
+	    UnexpectedTokenIllegal: 'Unexpected token ILLEGAL',
+	    UnexpectedNumber: 'Unexpected number',
+	    UnexpectedString: 'Unexpected string',
+	    UnexpectedIdentifier: 'Unexpected identifier',
+	    UnexpectedReserved: 'Unexpected reserved word',
+	    UnexpectedTemplate: 'Unexpected quasi %0',
+	    UnexpectedEOS: 'Unexpected end of input',
+	    NewlineAfterThrow: 'Illegal newline after throw',
+	    InvalidRegExp: 'Invalid regular expression',
+	    UnterminatedRegExp: 'Invalid regular expression: missing /',
+	    InvalidLHSInAssignment: 'Invalid left-hand side in assignment',
+	    InvalidLHSInForIn: 'Invalid left-hand side in for-in',
+	    InvalidLHSInForLoop: 'Invalid left-hand side in for-loop',
+	    MultipleDefaultsInSwitch: 'More than one default clause in switch statement',
+	    NoCatchOrFinally: 'Missing catch or finally after try',
+	    UnknownLabel: 'Undefined label \'%0\'',
+	    Redeclaration: '%0 \'%1\' has already been declared',
+	    IllegalContinue: 'Illegal continue statement',
+	    IllegalBreak: 'Illegal break statement',
+	    IllegalReturn: 'Illegal return statement',
+	    StrictModeWith: 'Strict mode code may not include a with statement',
+	    StrictCatchVariable: 'Catch variable may not be eval or arguments in strict mode',
+	    StrictVarName: 'Variable name may not be eval or arguments in strict mode',
+	    StrictParamName: 'Parameter name eval or arguments is not allowed in strict mode',
+	    StrictParamDupe: 'Strict mode function may not have duplicate parameter names',
+	    StrictFunctionName: 'Function name may not be eval or arguments in strict mode',
+	    StrictOctalLiteral: 'Octal literals are not allowed in strict mode.',
+	    StrictDelete: 'Delete of an unqualified identifier in strict mode.',
+	    StrictLHSAssignment: 'Assignment to eval or arguments is not allowed in strict mode',
+	    StrictLHSPostfix: 'Postfix increment/decrement may not have eval or arguments operand in strict mode',
+	    StrictLHSPrefix: 'Prefix increment/decrement may not have eval or arguments operand in strict mode',
+	    StrictReservedWord: 'Use of future reserved word in strict mode',
+	    TemplateOctalLiteral: 'Octal literals are not allowed in template strings.',
+	    ParameterAfterRestParameter: 'Rest parameter must be last formal parameter',
+	    DefaultRestParameter: 'Unexpected token =',
+	    ObjectPatternAsRestParameter: 'Unexpected token {',
+	    DuplicateProtoProperty: 'Duplicate __proto__ fields are not allowed in object literals',
+	    ConstructorSpecialMethod: 'Class constructor may not be an accessor',
+	    DuplicateConstructor: 'A class may only have one constructor',
+	    StaticPrototype: 'Classes may not have static property named prototype',
+	    MissingFromClause: 'Unexpected token',
+	    NoAsAfterImportNamespace: 'Unexpected token',
+	    InvalidModuleSpecifier: 'Unexpected token',
+	    IllegalImportDeclaration: 'Unexpected token',
+	    IllegalExportDeclaration: 'Unexpected token',
+	    DuplicateBinding: 'Duplicate binding %0',
+	    DeclarationMissingInitializer: 'Missing initializer in %0 declaration',
+	    LetInLexicalBinding: 'let is disallowed as a lexically bound name',
+	    ForInOfLoopInitializer: '%0 loop variable declaration may not have an initializer'
+	};
+
+
+/***/ },
+/* 6 */
+/***/ function(module, exports) {
+
+	"use strict";
+	var ErrorHandler = (function () {
+	    function ErrorHandler() {
+	        this.errors = [];
+	        this.tolerant = false;
+	    }
+	    ;
+	    ErrorHandler.prototype.recordError = function (error) {
+	        this.errors.push(error);
+	    };
+	    ;
+	    ErrorHandler.prototype.tolerate = function (error) {
+	        if (this.tolerant) {
+	            this.recordError(error);
+	        }
+	        else {
+	            throw error;
+	        }
+	    };
+	    ;
+	    ErrorHandler.prototype.constructError = function (msg, column) {
+	        var error = new Error(msg);
+	        try {
+	            throw error;
+	        }
+	        catch (base) {
+	            /* istanbul ignore else */
+	            if (Object.create && Object.defineProperty) {
+	                error = Object.create(base);
+	                Object.defineProperty(error, 'column', { value: column });
+	            }
+	        }
+	        finally {
+	            return error;
+	        }
+	        /* istanbul ignore next */
+	        return error;
+	    };
+	    ;
+	    ErrorHandler.prototype.createError = function (index, line, col, description) {
+	        var msg = 'Line ' + line + ': ' + description;
+	        var error = this.constructError(msg, col);
+	        error.index = index;
+	        error.lineNumber = line;
+	        error.description = description;
+	        return error;
+	    };
+	    ;
+	    ErrorHandler.prototype.throwError = function (index, line, col, description) {
+	        throw this.createError(index, line, col, description);
+	    };
+	    ;
+	    ErrorHandler.prototype.tolerateError = function (index, line, col, description) {
+	        var error = this.createError(index, line, col, description);
+	        if (this.tolerant) {
+	            this.recordError(error);
+	        }
+	        else {
+	            throw error;
+	        }
+	    };
+	    ;
+	    return ErrorHandler;
+	}());
+	exports.ErrorHandler = ErrorHandler;
+
+
+/***/ },
+/* 7 */
+/***/ function(module, exports) {
+
+	"use strict";
+	(function (Token) {
+	    Token[Token["BooleanLiteral"] = 1] = "BooleanLiteral";
+	    Token[Token["EOF"] = 2] = "EOF";
+	    Token[Token["Identifier"] = 3] = "Identifier";
+	    Token[Token["Keyword"] = 4] = "Keyword";
+	    Token[Token["NullLiteral"] = 5] = "NullLiteral";
+	    Token[Token["NumericLiteral"] = 6] = "NumericLiteral";
+	    Token[Token["Punctuator"] = 7] = "Punctuator";
+	    Token[Token["StringLiteral"] = 8] = "StringLiteral";
+	    Token[Token["RegularExpression"] = 9] = "RegularExpression";
+	    Token[Token["Template"] = 10] = "Template";
+	})(exports.Token || (exports.Token = {}));
+	var Token = exports.Token;
+	;
+	exports.TokenName = {};
+	exports.TokenName[Token.BooleanLiteral] = 'Boolean';
+	exports.TokenName[Token.EOF] = '<end>';
+	exports.TokenName[Token.Identifier] = 'Identifier';
+	exports.TokenName[Token.Keyword] = 'Keyword';
+	exports.TokenName[Token.NullLiteral] = 'Null';
+	exports.TokenName[Token.NumericLiteral] = 'Numeric';
+	exports.TokenName[Token.Punctuator] = 'Punctuator';
+	exports.TokenName[Token.StringLiteral] = 'String';
+	exports.TokenName[Token.RegularExpression] = 'RegularExpression';
+	exports.TokenName[Token.Template] = 'Template';
+
+
+/***/ },
+/* 8 */
+/***/ function(module, exports, __webpack_require__) {
+
+	"use strict";
+	var assert_1 = __webpack_require__(4);
+	var messages_1 = __webpack_require__(5);
+	var character_1 = __webpack_require__(9);
+	var token_1 = __webpack_require__(7);
+	function hexValue(ch) {
+	    return '0123456789abcdef'.indexOf(ch.toLowerCase());
+	}
+	function octalValue(ch) {
+	    return '01234567'.indexOf(ch);
+	}
+	var Scanner = (function () {
+	    function Scanner(code, handler) {
+	        this.source = code;
+	        this.errorHandler = handler;
+	        this.trackComment = false;
+	        this.length = code.length;
+	        this.index = 0;
+	        this.lineNumber = (code.length > 0) ? 1 : 0;
+	        this.lineStart = 0;
+	        this.curlyStack = [];
+	    }
+	    ;
+	    Scanner.prototype.eof = function () {
+	        return this.index >= this.length;
+	    };
+	    ;
+	    Scanner.prototype.throwUnexpectedToken = function (message) {
+	        if (message === void 0) { message = messages_1.Messages.UnexpectedTokenIllegal; }
+	        this.errorHandler.throwError(this.index, this.lineNumber, this.index - this.lineStart + 1, message);
+	    };
+	    ;
+	    Scanner.prototype.tolerateUnexpectedToken = function () {
+	        this.errorHandler.tolerateError(this.index, this.lineNumber, this.index - this.lineStart + 1, messages_1.Messages.UnexpectedTokenIllegal);
+	    };
+	    ;
+	    // ECMA-262 11.4 Comments
+	    Scanner.prototype.skipSingleLineComment = function (offset) {
+	        var comments = [];
+	        var start, loc;
+	        if (this.trackComment) {
+	            comments = [];
+	            start = this.index - offset;
+	            loc = {
+	                start: {
+	                    line: this.lineNumber,
+	                    column: this.index - this.lineStart - offset
+	                },
+	                end: {}
+	            };
+	        }
+	        while (!this.eof()) {
+	            var ch = this.source.charCodeAt(this.index);
+	            ++this.index;
+	            if (character_1.Character.isLineTerminator(ch)) {
+	                if (this.trackComment) {
+	                    loc.end = {
+	                        line: this.lineNumber,
+	                        column: this.index - this.lineStart - 1
+	                    };
+	                    var entry = {
+	                        multiLine: false,
+	                        slice: [start + offset, this.index - 1],
+	                        range: [start, this.index - 1],
+	                        loc: loc
+	                    };
+	                    comments.push(entry);
+	                }
+	                if (ch === 13 && this.source.charCodeAt(this.index) === 10) {
+	                    ++this.index;
+	                }
+	                ++this.lineNumber;
+	                this.lineStart = this.index;
+	                return comments;
+	            }
+	        }
+	        if (this.trackComment) {
+	            loc.end = {
+	                line: this.lineNumber,
+	                column: this.index - this.lineStart
+	            };
+	            var entry = {
+	                multiLine: false,
+	                slice: [start + offset, this.index],
+	                range: [start, this.index],
+	                loc: loc
+	            };
+	            comments.push(entry);
+	        }
+	        return comments;
+	    };
+	    ;
+	    Scanner.prototype.skipMultiLineComment = function () {
+	        var comments = [];
+	        var start, loc;
+	        if (this.trackComment) {
+	            comments = [];
+	            start = this.index - 2;
+	            loc = {
+	                start: {
+	                    line: this.lineNumber,
+	                    column: this.index - this.lineStart - 2
+	                },
+	                end: {}
+	            };
+	        }
+	        while (!this.eof()) {
+	            var ch = this.source.charCodeAt(this.index);
+	            if (character_1.Character.isLineTerminator(ch)) {
+	                if (ch === 0x0D && this.source.charCodeAt(this.index + 1) === 0x0A) {
+	                    ++this.index;
+	                }
+	                ++this.lineNumber;
+	                ++this.index;
+	                this.lineStart = this.index;
+	            }
+	            else if (ch === 0x2A) {
+	                // Block comment ends with '*/'.
+	                if (this.source.charCodeAt(this.index + 1) === 0x2F) {
+	                    this.index += 2;
+	                    if (this.trackComment) {
+	                        loc.end = {
+	                            line: this.lineNumber,
+	                            column: this.index - this.lineStart
+	                        };
+	                        var entry = {
+	                            multiLine: true,
+	                            slice: [start + 2, this.index - 2],
+	                            range: [start, this.index],
+	                            loc: loc
+	                        };
+	                        comments.push(entry);
+	                    }
+	                    return comments;
+	                }
+	                ++this.index;
+	            }
+	            else {
+	                ++this.index;
+	            }
+	        }
+	        // Ran off the end of the file - the whole thing is a comment
+	        if (this.trackComment) {
+	            loc.end = {
+	                line: this.lineNumber,
+	                column: this.index - this.lineStart
+	            };
+	            var entry = {
+	                multiLine: true,
+	                slice: [start + 2, this.index],
+	                range: [start, this.index],
+	                loc: loc
+	            };
+	            comments.push(entry);
+	        }
+	        this.tolerateUnexpectedToken();
+	        return comments;
+	    };
+	    ;
+	    Scanner.prototype.scanComments = function () {
+	        var comments;
+	        if (this.trackComment) {
+	            comments = [];
+	        }
+	        var start = (this.index === 0);
+	        while (!this.eof()) {
+	            var ch = this.source.charCodeAt(this.index);
+	            if (character_1.Character.isWhiteSpace(ch)) {
+	                ++this.index;
+	            }
+	            else if (character_1.Character.isLineTerminator(ch)) {
+	                ++this.index;
+	                if (ch === 0x0D && this.source.charCodeAt(this.index) === 0x0A) {
+	                    ++this.index;
+	                }
+	                ++this.lineNumber;
+	                this.lineStart = this.index;
+	                start = true;
+	            }
+	            else if (ch === 0x2F) {
+	                ch = this.source.charCodeAt(this.index + 1);
+	                if (ch === 0x2F) {
+	                    this.index += 2;
+	                    var comment = this.skipSingleLineComment(2);
+	                    if (this.trackComment) {
+	                        comments = comments.concat(comment);
+	                    }
+	                    start = true;
+	                }
+	                else if (ch === 0x2A) {
+	                    this.index += 2;
+	                    var comment = this.skipMultiLineComment();
+	                    if (this.trackComment) {
+	                        comments = comments.concat(comment);
+	                    }
+	                }
+	                else {
+	                    break;
+	                }
+	            }
+	            else if (start && ch === 0x2D) {
+	                // U+003E is '>'
+	                if ((this.source.charCodeAt(this.index + 1) === 0x2D) && (this.source.charCodeAt(this.index + 2) === 0x3E)) {
+	                    // '-->' is a single-line comment
+	                    this.index += 3;
+	                    var comment = this.skipSingleLineComment(3);
+	                    if (this.trackComment) {
+	                        comments = comments.concat(comment);
+	                    }
+	                }
+	                else {
+	                    break;
+	                }
+	            }
+	            else if (ch === 0x3C) {
+	                if (this.source.slice(this.index + 1, this.index + 4) === '!--') {
+	                    this.index += 4; // `<!--`
+	                    var comment = this.skipSingleLineComment(4);
+	                    if (this.trackComment) {
+	                        comments = comments.concat(comment);
+	                    }
+	                }
+	                else {
+	                    break;
+	                }
+	            }
+	            else {
+	                break;
+	            }
+	        }
+	        return comments;
+	    };
+	    ;
+	    // ECMA-262 11.6.2.2 Future Reserved Words
+	    Scanner.prototype.isFutureReservedWord = function (id) {
+	        switch (id) {
+	            case 'enum':
+	            case 'export':
+	            case 'import':
+	            case 'super':
+	                return true;
+	            default:
+	                return false;
+	        }
+	    };
+	    ;
+	    Scanner.prototype.isStrictModeReservedWord = function (id) {
+	        switch (id) {
+	            case 'implements':
+	            case 'interface':
+	            case 'package':
+	            case 'private':
+	            case 'protected':
+	            case 'public':
+	            case 'static':
+	            case 'yield':
+	            case 'let':
+	                return true;
+	            default:
+	                return false;
+	        }
+	    };
+	    ;
+	    Scanner.prototype.isRestrictedWord = function (id) {
+	        return id === 'eval' || id === 'arguments';
+	    };
+	    ;
+	    // ECMA-262 11.6.2.1 Keywords
+	    Scanner.prototype.isKeyword = function (id) {
+	        switch (id.length) {
+	            case 2:
+	                return (id === 'if') || (id === 'in') || (id === 'do');
+	            case 3:
+	                return (id === 'var') || (id === 'for') || (id === 'new') ||
+	                    (id === 'try') || (id === 'let');
+	            case 4:
+	                return (id === 'this') || (id === 'else') || (id === 'case') ||
+	                    (id === 'void') || (id === 'with') || (id === 'enum');
+	            case 5:
+	                return (id === 'while') || (id === 'break') || (id === 'catch') ||
+	                    (id === 'throw') || (id === 'const') || (id === 'yield') ||
+	                    (id === 'class') || (id === 'super');
+	            case 6:
+	                return (id === 'return') || (id === 'typeof') || (id === 'delete') ||
+	                    (id === 'switch') || (id === 'export') || (id === 'import');
+	            case 7:
+	                return (id === 'default') || (id === 'finally') || (id === 'extends');
+	            case 8:
+	                return (id === 'function') || (id === 'continue') || (id === 'debugger');
+	            case 10:
+	                return (id === 'instanceof');
+	            default:
+	                return false;
+	        }
+	    };
+	    ;
+	    Scanner.prototype.codePointAt = function (i) {
+	        var cp = this.source.charCodeAt(i);
+	        if (cp >= 0xD800 && cp <= 0xDBFF) {
+	            var second = this.source.charCodeAt(i + 1);
+	            if (second >= 0xDC00 && second <= 0xDFFF) {
+	                var first = cp;
+	                cp = (first - 0xD800) * 0x400 + second - 0xDC00 + 0x10000;
+	            }
+	        }
+	        return cp;
+	    };
+	    ;
+	    Scanner.prototype.scanHexEscape = function (prefix) {
+	        var len = (prefix === 'u') ? 4 : 2;
+	        var code = 0;
+	        for (var i = 0; i < len; ++i) {
+	            if (!this.eof() && character_1.Character.isHexDigit(this.source.charCodeAt(this.index))) {
+	                code = code * 16 + hexValue(this.source[this.index++]);
+	            }
+	            else {
+	                return '';
+	            }
+	        }
+	        return String.fromCharCode(code);
+	    };
+	    ;
+	    Scanner.prototype.scanUnicodeCodePointEscape = function () {
+	        var ch = this.source[this.index];
+	        var code = 0;
+	        // At least, one hex digit is required.
+	        if (ch === '}') {
+	            this.throwUnexpectedToken();
+	        }
+	        while (!this.eof()) {
+	            ch = this.source[this.index++];
+	            if (!character_1.Character.isHexDigit(ch.charCodeAt(0))) {
+	                break;
+	            }
+	            code = code * 16 + hexValue(ch);
+	        }
+	        if (code > 0x10FFFF || ch !== '}') {
+	            this.throwUnexpectedToken();
+	        }
+	        return character_1.Character.fromCodePoint(code);
+	    };
+	    ;
+	    Scanner.prototype.getIdentifier = function () {
+	        var start = this.index++;
+	        while (!this.eof()) {
+	            var ch = this.source.charCodeAt(this.index);
+	            if (ch === 0x5C) {
+	                // Blackslash (U+005C) marks Unicode escape sequence.
+	                this.index = start;
+	                return this.getComplexIdentifier();
+	            }
+	            else if (ch >= 0xD800 && ch < 0xDFFF) {
+	                // Need to handle surrogate pairs.
+	                this.index = start;
+	                return this.getComplexIdentifier();
+	            }
+	            if (character_1.Character.isIdentifierPart(ch)) {
+	                ++this.index;
+	            }
+	            else {
+	                break;
+	            }
+	        }
+	        return this.source.slice(start, this.index);
+	    };
+	    ;
+	    Scanner.prototype.getComplexIdentifier = function () {
+	        var cp = this.codePointAt(this.index);
+	        var id = character_1.Character.fromCodePoint(cp);
+	        this.index += id.length;
+	        // '\u' (U+005C, U+0075) denotes an escaped character.
+	        var ch;
+	        if (cp === 0x5C) {
+	            if (this.source.charCodeAt(this.index) !== 0x75) {
+	                this.throwUnexpectedToken();
+	            }
+	            ++this.index;
+	            if (this.source[this.index] === '{') {
+	                ++this.index;
+	                ch = this.scanUnicodeCodePointEscape();
+	            }
+	            else {
+	                ch = this.scanHexEscape('u');
+	                cp = ch.charCodeAt(0);
+	                if (!ch || ch === '\\' || !character_1.Character.isIdentifierStart(cp)) {
+	                    this.throwUnexpectedToken();
+	                }
+	            }
+	            id = ch;
+	        }
+	        while (!this.eof()) {
+	            cp = this.codePointAt(this.index);
+	            if (!character_1.Character.isIdentifierPart(cp)) {
+	                break;
+	            }
+	            ch = character_1.Character.fromCodePoint(cp);
+	            id += ch;
+	            this.index += ch.length;
+	            // '\u' (U+005C, U+0075) denotes an escaped character.
+	            if (cp === 0x5C) {
+	                id = id.substr(0, id.length - 1);
+	                if (this.source.charCodeAt(this.index) !== 0x75) {
+	                    this.throwUnexpectedToken();
+	                }
+	                ++this.index;
+	                if (this.source[this.index] === '{') {
+	                    ++this.index;
+	                    ch = this.scanUnicodeCodePointEscape();
+	                }
+	                else {
+	                    ch = this.scanHexEscape('u');
+	                    cp = ch.charCodeAt(0);
+	                    if (!ch || ch === '\\' || !character_1.Character.isIdentifierPart(cp)) {
+	                        this.throwUnexpectedToken();
+	                    }
+	                }
+	                id += ch;
+	            }
+	        }
+	        return id;
+	    };
+	    ;
+	    Scanner.prototype.octalToDecimal = function (ch) {
+	        // \0 is not octal escape sequence
+	        var octal = (ch !== '0');
+	        var code = octalValue(ch);
+	        if (!this.eof() && character_1.Character.isOctalDigit(this.source.charCodeAt(this.index))) {
+	            octal = true;
+	            code = code * 8 + octalValue(this.source[this.index++]);
+	            // 3 digits are only allowed when string starts
+	            // with 0, 1, 2, 3
+	            if ('0123'.indexOf(ch) >= 0 && !this.eof() && character_1.Character.isOctalDigit(this.source.charCodeAt(this.index))) {
+	                code = code * 8 + octalValue(this.source[this.index++]);
+	            }
+	        }
+	        return {
+	            code: code,
+	            octal: octal
+	        };
+	    };
+	    ;
+	    // ECMA-262 11.6 Names and Keywords
+	    Scanner.prototype.scanIdentifier = function () {
+	        var type;
+	        var start = this.index;
+	        // Backslash (U+005C) starts an escaped character.
+	        var id = (this.source.charCodeAt(start) === 0x5C) ? this.getComplexIdentifier() : this.getIdentifier();
+	        // There is no keyword or literal with only one character.
+	        // Thus, it must be an identifier.
+	        if (id.length === 1) {
+	            type = token_1.Token.Identifier;
+	        }
+	        else if (this.isKeyword(id)) {
+	            type = token_1.Token.Keyword;
+	        }
+	        else if (id === 'null') {
+	            type = token_1.Token.NullLiteral;
+	        }
+	        else if (id === 'true' || id === 'false') {
+	            type = token_1.Token.BooleanLiteral;
+	        }
+	        else {
+	            type = token_1.Token.Identifier;
+	        }
+	        return {
+	            type: type,
+	            value: id,
+	            lineNumber: this.lineNumber,
+	            lineStart: this.lineStart,
+	            start: start,
+	            end: this.index
+	        };
+	    };
+	    ;
+	    // ECMA-262 11.7 Punctuators
+	    Scanner.prototype.scanPunctuator = function () {
+	        var token = {
+	            type: token_1.Token.Punctuator,
+	            value: '',
+	            lineNumber: this.lineNumber,
+	            lineStart: this.lineStart,
+	            start: this.index,
+	            end: this.index
+	        };
+	        // Check for most common single-character punctuators.
+	        var str = this.source[this.index];
+	        switch (str) {
+	            case '(':
+	            case '{':
+	                if (str === '{') {
+	                    this.curlyStack.push('{');
+	                }
+	                ++this.index;
+	                break;
+	            case '.':
+	                ++this.index;
+	                if (this.source[this.index] === '.' && this.source[this.index + 1] === '.') {
+	                    // Spread operator: ...
+	                    this.index += 2;
+	                    str = '...';
+	                }
+	                break;
+	            case '}':
+	                ++this.index;
+	                this.curlyStack.pop();
+	                break;
+	            case ')':
+	            case ';':
+	            case ',':
+	            case '[':
+	            case ']':
+	            case ':':
+	            case '?':
+	            case '~':
+	                ++this.index;
+	                break;
+	            default:
+	                // 4-character punctuator.
+	                str = this.source.substr(this.index, 4);
+	                if (str === '>>>=') {
+	                    this.index += 4;
+	                }
+	                else {
+	                    // 3-character punctuators.
+	                    str = str.substr(0, 3);
+	                    if (str === '===' || str === '!==' || str === '>>>' ||
+	                        str === '<<=' || str === '>>=' || str === '**=') {
+	                        this.index += 3;
+	                    }
+	                    else {
+	                        // 2-character punctuators.
+	                        str = str.substr(0, 2);
+	                        if (str === '&&' || str === '||' || str === '==' || str === '!=' ||
+	                            str === '+=' || str === '-=' || str === '*=' || str === '/=' ||
+	                            str === '++' || str === '--' || str === '<<' || str === '>>' ||
+	                            str === '&=' || str === '|=' || str === '^=' || str === '%=' ||
+	                            str === '<=' || str === '>=' || str === '=>' || str === '**') {
+	                            this.index += 2;
+	                        }
+	                        else {
+	                            // 1-character punctuators.
+	                            str = this.source[this.index];
+	                            if ('<>=!+-*%&|^/'.indexOf(str) >= 0) {
+	                                ++this.index;
+	                            }
+	                        }
+	                    }
+	                }
+	        }
+	        if (this.index === token.start) {
+	            this.throwUnexpectedToken();
+	        }
+	        token.end = this.index;
+	        token.value = str;
+	        return token;
+	    };
+	    ;
+	    // ECMA-262 11.8.3 Numeric Literals
+	    Scanner.prototype.scanHexLiteral = function (start) {
+	        var number = '';
+	        while (!this.eof()) {
+	            if (!character_1.Character.isHexDigit(this.source.charCodeAt(this.index))) {
+	                break;
+	            }
+	            number += this.source[this.index++];
+	        }
+	        if (number.length === 0) {
+	            this.throwUnexpectedToken();
+	        }
+	        if (character_1.Character.isIdentifierStart(this.source.charCodeAt(this.index))) {
+	            this.throwUnexpectedToken();
+	        }
+	        return {
+	            type: token_1.Token.NumericLiteral,
+	            value: parseInt('0x' + number, 16),
+	            lineNumber: this.lineNumber,
+	            lineStart: this.lineStart,
+	            start: start,
+	            end: this.index
+	        };
+	    };
+	    ;
+	    Scanner.prototype.scanBinaryLiteral = function (start) {
+	        var number = '';
+	        var ch;
+	        while (!this.eof()) {
+	            ch = this.source[this.index];
+	            if (ch !== '0' && ch !== '1') {
+	                break;
+	            }
+	            number += this.source[this.index++];
+	        }
+	        if (number.length === 0) {
+	            // only 0b or 0B
+	            this.throwUnexpectedToken();
+	        }
+	        if (!this.eof()) {
+	            ch = this.source.charCodeAt(this.index);
+	            /* istanbul ignore else */
+	            if (character_1.Character.isIdentifierStart(ch) || character_1.Character.isDecimalDigit(ch)) {
+	                this.throwUnexpectedToken();
+	            }
+	        }
+	        return {
+	            type: token_1.Token.NumericLiteral,
+	            value: parseInt(number, 2),
+	            lineNumber: this.lineNumber,
+	            lineStart: this.lineStart,
+	            start: start,
+	            end: this.index
+	        };
+	    };
+	    ;
+	    Scanner.prototype.scanOctalLiteral = function (prefix, start) {
+	        var number = '';
+	        var octal = false;
+	        if (character_1.Character.isOctalDigit(prefix.charCodeAt(0))) {
+	            octal = true;
+	            number = '0' + this.source[this.index++];
+	        }
+	        else {
+	            ++this.index;
+	        }
+	        while (!this.eof()) {
+	            if (!character_1.Character.isOctalDigit(this.source.charCodeAt(this.index))) {
+	                break;
+	            }
+	            number += this.source[this.index++];
+	        }
+	        if (!octal && number.length === 0) {
+	            // only 0o or 0O
+	            this.throwUnexpectedToken();
+	        }
+	        if (character_1.Character.isIdentifierStart(this.source.charCodeAt(this.index)) || character_1.Character.isDecimalDigit(this.source.charCodeAt(this.index))) {
+	            this.throwUnexpectedToken();
+	        }
+	        return {
+	            type: token_1.Token.NumericLiteral,
+	            value: parseInt(number, 8),
+	            octal: octal,
+	            lineNumber: this.lineNumber,
+	            lineStart: this.lineStart,
+	            start: start,
+	            end: this.index
+	        };
+	    };
+	    ;
+	    Scanner.prototype.isImplicitOctalLiteral = function () {
+	        // Implicit octal, unless there is a non-octal digit.
+	        // (Annex B.1.1 on Numeric Literals)
+	        for (var i = this.index + 1; i < this.length; ++i) {
+	            var ch = this.source[i];
+	            if (ch === '8' || ch === '9') {
+	                return false;
+	            }
+	            if (!character_1.Character.isOctalDigit(ch.charCodeAt(0))) {
+	                return true;
+	            }
+	        }
+	        return true;
+	    };
+	    ;
+	    Scanner.prototype.scanNumericLiteral = function () {
+	        var start = this.index;
+	        var ch = this.source[start];
+	        assert_1.assert(character_1.Character.isDecimalDigit(ch.charCodeAt(0)) || (ch === '.'), 'Numeric literal must start with a decimal digit or a decimal point');
+	        var number = '';
+	        if (ch !== '.') {
+	            number = this.source[this.index++];
+	            ch = this.source[this.index];
+	            // Hex number starts with '0x'.
+	            // Octal number starts with '0'.
+	            // Octal number in ES6 starts with '0o'.
+	            // Binary number in ES6 starts with '0b'.
+	            if (number === '0') {
+	                if (ch === 'x' || ch === 'X') {
+	                    ++this.index;
+	                    return this.scanHexLiteral(start);
+	                }
+	                if (ch === 'b' || ch === 'B') {
+	                    ++this.index;
+	                    return this.scanBinaryLiteral(start);
+	                }
+	                if (ch === 'o' || ch === 'O') {
+	                    return this.scanOctalLiteral(ch, start);
+	                }
+	                if (ch && character_1.Character.isOctalDigit(ch.charCodeAt(0))) {
+	                    if (this.isImplicitOctalLiteral()) {
+	                        return this.scanOctalLiteral(ch, start);
+	                    }
+	                }
+	            }
+	            while (character_1.Character.isDecimalDigit(this.source.charCodeAt(this.index))) {
+	                number += this.source[this.index++];
+	            }
+	            ch = this.source[this.index];
+	        }
+	        if (ch === '.') {
+	            number += this.source[this.index++];
+	            while (character_1.Character.isDecimalDigit(this.source.charCodeAt(this.index))) {
+	                number += this.source[this.index++];
+	            }
+	            ch = this.source[this.index];
+	        }
+	        if (ch === 'e' || ch === 'E') {
+	            number += this.source[this.index++];
+	            ch = this.source[this.index];
+	            if (ch === '+' || ch === '-') {
+	                number += this.source[this.index++];
+	            }
+	            if (character_1.Character.isDecimalDigit(this.source.charCodeAt(this.index))) {
+	                while (character_1.Character.isDecimalDigit(this.source.charCodeAt(this.index))) {
+	                    number += this.source[this.index++];
+	                }
+	            }
+	            else {
+	                this.throwUnexpectedToken();
+	            }
+	        }
+	        if (character_1.Character.isIdentifierStart(this.source.charCodeAt(this.index))) {
+	            this.throwUnexpectedToken();
+	        }
+	        return {
+	            type: token_1.Token.NumericLiteral,
+	            value: parseFloat(number),
+	            lineNumber: this.lineNumber,
+	            lineStart: this.lineStart,
+	            start: start,
+	            end: this.index
+	        };
+	    };
+	    ;
+	    // ECMA-262 11.8.4 String Literals
+	    Scanner.prototype.scanStringLiteral = function () {
+	        var start = this.index;
+	        var quote = this.source[start];
+	        assert_1.assert((quote === '\'' || quote === '"'), 'String literal must starts with a quote');
+	        ++this.index;
+	        var octal = false;
+	        var str = '';
+	        while (!this.eof()) {
+	            var ch = this.source[this.index++];
+	            if (ch === quote) {
+	                quote = '';
+	                break;
+	            }
+	            else if (ch === '\\') {
+	                ch = this.source[this.index++];
+	                if (!ch || !character_1.Character.isLineTerminator(ch.charCodeAt(0))) {
+	                    switch (ch) {
+	                        case 'u':
+	                        case 'x':
+	                            if (this.source[this.index] === '{') {
+	                                ++this.index;
+	                                str += this.scanUnicodeCodePointEscape();
+	                            }
+	                            else {
+	                                var unescaped = this.scanHexEscape(ch);
+	                                if (!unescaped) {
+	                                    this.throwUnexpectedToken();
+	                                }
+	                                str += unescaped;
+	                            }
+	                            break;
+	                        case 'n':
+	                            str += '\n';
+	                            break;
+	                        case 'r':
+	                            str += '\r';
+	                            break;
+	                        case 't':
+	                            str += '\t';
+	                            break;
+	                        case 'b':
+	                            str += '\b';
+	                            break;
+	                        case 'f':
+	                            str += '\f';
+	                            break;
+	                        case 'v':
+	                            str += '\x0B';
+	                            break;
+	                        case '8':
+	                        case '9':
+	                            str += ch;
+	                            this.tolerateUnexpectedToken();
+	                            break;
+	                        default:
+	                            if (ch && character_1.Character.isOctalDigit(ch.charCodeAt(0))) {
+	                                var octToDec = this.octalToDecimal(ch);
+	                                octal = octToDec.octal || octal;
+	                                str += String.fromCharCode(octToDec.code);
+	                            }
+	                            else {
+	                                str += ch;
+	                            }
+	                            break;
+	                    }
+	                }
+	                else {
+	                    ++this.lineNumber;
+	                    if (ch === '\r' && this.source[this.index] === '\n') {
+	                        ++this.index;
+	                    }
+	                    this.lineStart = this.index;
+	                }
+	            }
+	            else if (character_1.Character.isLineTerminator(ch.charCodeAt(0))) {
+	                break;
+	            }
+	            else {
+	                str += ch;
+	            }
+	        }
+	        if (quote !== '') {
+	            this.index = start;
+	            this.throwUnexpectedToken();
+	        }
+	        return {
+	            type: token_1.Token.StringLiteral,
+	            value: str,
+	            octal: octal,
+	            lineNumber: this.lineNumber,
+	            lineStart: this.lineStart,
+	            start: start,
+	            end: this.index
+	        };
+	    };
+	    ;
+	    // ECMA-262 11.8.6 Template Literal Lexical Components
+	    Scanner.prototype.scanTemplate = function () {
+	        var cooked = '';
+	        var terminated = false;
+	        var start = this.index;
+	        var head = (this.source[start] === '`');
+	        var tail = false;
+	        var rawOffset = 2;
+	        ++this.index;
+	        while (!this.eof()) {
+	            var ch = this.source[this.index++];
+	            if (ch === '`') {
+	                rawOffset = 1;
+	                tail = true;
+	                terminated = true;
+	                break;
+	            }
+	            else if (ch === '$') {
+	                if (this.source[this.index] === '{') {
+	                    this.curlyStack.push('${');
+	                    ++this.index;
+	                    terminated = true;
+	                    break;
+	                }
+	                cooked += ch;
+	            }
+	            else if (ch === '\\') {
+	                ch = this.source[this.index++];
+	                if (!character_1.Character.isLineTerminator(ch.charCodeAt(0))) {
+	                    switch (ch) {
+	                        case 'n':
+	                            cooked += '\n';
+	                            break;
+	                        case 'r':
+	                            cooked += '\r';
+	                            break;
+	                        case 't':
+	                            cooked += '\t';
+	                            break;
+	                        case 'u':
+	                        case 'x':
+	                            if (this.source[this.index] === '{') {
+	                                ++this.index;
+	                                cooked += this.scanUnicodeCodePointEscape();
+	                            }
+	                            else {
+	                                var restore = this.index;
+	                                var unescaped = this.scanHexEscape(ch);
+	                                if (unescaped) {
+	                                    cooked += unescaped;
+	                                }
+	                                else {
+	                                    this.index = restore;
+	                                    cooked += ch;
+	                                }
+	                            }
+	                            break;
+	                        case 'b':
+	                            cooked += '\b';
+	                            break;
+	                        case 'f':
+	                            cooked += '\f';
+	                            break;
+	                        case 'v':
+	                            cooked += '\v';
+	                            break;
+	                        default:
+	                            if (ch === '0') {
+	                                if (character_1.Character.isDecimalDigit(this.source.charCodeAt(this.index))) {
+	                                    // Illegal: \01 \02 and so on
+	                                    this.throwUnexpectedToken(messages_1.Messages.TemplateOctalLiteral);
+	                                }
+	                                cooked += '\0';
+	                            }
+	                            else if (character_1.Character.isOctalDigit(ch.charCodeAt(0))) {
+	                                // Illegal: \1 \2
+	                                this.throwUnexpectedToken(messages_1.Messages.TemplateOctalLiteral);
+	                            }
+	                            else {
+	                                cooked += ch;
+	                            }
+	                            break;
+	                    }
+	                }
+	                else {
+	                    ++this.lineNumber;
+	                    if (ch === '\r' && this.source[this.index] === '\n') {
+	                        ++this.index;
+	                    }
+	                    this.lineStart = this.index;
+	                }
+	            }
+	            else if (character_1.Character.isLineTerminator(ch.charCodeAt(0))) {
+	                ++this.lineNumber;
+	                if (ch === '\r' && this.source[this.index] === '\n') {
+	                    ++this.index;
+	                }
+	                this.lineStart = this.index;
+	                cooked += '\n';
+	            }
+	            else {
+	                cooked += ch;
+	            }
+	        }
+	        if (!terminated) {
+	            this.throwUnexpectedToken();
+	        }
+	        if (!head) {
+	            this.curlyStack.pop();
+	        }
+	        return {
+	            type: token_1.Token.Template,
+	            value: {
+	                cooked: cooked,
+	                raw: this.source.slice(start + 1, this.index - rawOffset)
+	            },
+	            head: head,
+	            tail: tail,
+	            lineNumber: this.lineNumber,
+	            lineStart: this.lineStart,
+	            start: start,
+	            end: this.index
+	        };
+	    };
+	    ;
+	    // ECMA-262 11.8.5 Regular Expression Literals
+	    Scanner.prototype.testRegExp = function (pattern, flags) {
+	        // The BMP character to use as a replacement for astral symbols when
+	        // translating an ES6 "u"-flagged pattern to an ES5-compatible
+	        // approximation.
+	        // Note: replacing with '\uFFFF' enables false positives in unlikely
+	        // scenarios. For example, `[\u{1044f}-\u{10440}]` is an invalid
+	        // pattern that would not be detected by this substitution.
+	        var astralSubstitute = '\uFFFF';
+	        var tmp = pattern;
+	        var self = this;
+	        if (flags.indexOf('u') >= 0) {
+	            tmp = tmp
+	                .replace(/\\u\{([0-9a-fA-F]+)\}|\\u([a-fA-F0-9]{4})/g, function ($0, $1, $2) {
+	                var codePoint = parseInt($1 || $2, 16);
+	                if (codePoint > 0x10FFFF) {
+	                    self.throwUnexpectedToken(messages_1.Messages.InvalidRegExp);
+	                }
+	                if (codePoint <= 0xFFFF) {
+	                    return String.fromCharCode(codePoint);
+	                }
+	                return astralSubstitute;
+	            })
+	                .replace(/[\uD800-\uDBFF][\uDC00-\uDFFF]/g, astralSubstitute);
+	        }
+	        // First, detect invalid regular expressions.
+	        try {
+	            RegExp(tmp);
+	        }
+	        catch (e) {
+	            this.throwUnexpectedToken(messages_1.Messages.InvalidRegExp);
+	        }
+	        // Return a regular expression object for this pattern-flag pair, or
+	        // `null` in case the current environment doesn't support the flags it
+	        // uses.
+	        try {
+	            return new RegExp(pattern, flags);
+	        }
+	        catch (exception) {
+	            /* istanbul ignore next */
+	            return null;
+	        }
+	    };
+	    ;
+	    Scanner.prototype.scanRegExpBody = function () {
+	        var ch = this.source[this.index];
+	        assert_1.assert(ch === '/', 'Regular expression literal must start with a slash');
+	        var str = this.source[this.index++];
+	        var classMarker = false;
+	        var terminated = false;
+	        while (!this.eof()) {
+	            ch = this.source[this.index++];
+	            str += ch;
+	            if (ch === '\\') {
+	                ch = this.source[this.index++];
+	                // ECMA-262 7.8.5
+	                if (character_1.Character.isLineTerminator(ch.charCodeAt(0))) {
+	                    this.throwUnexpectedToken(messages_1.Messages.UnterminatedRegExp);
+	                }
+	                str += ch;
+	            }
+	            else if (character_1.Character.isLineTerminator(ch.charCodeAt(0))) {
+	                this.throwUnexpectedToken(messages_1.Messages.UnterminatedRegExp);
+	            }
+	            else if (classMarker) {
+	                if (ch === ']') {
+	                    classMarker = false;
+	                }
+	            }
+	            else {
+	                if (ch === '/') {
+	                    terminated = true;
+	                    break;
+	                }
+	                else if (ch === '[') {
+	                    classMarker = true;
+	                }
+	            }
+	        }
+	        if (!terminated) {
+	            this.throwUnexpectedToken(messages_1.Messages.UnterminatedRegExp);
+	        }
+	        // Exclude leading and trailing slash.
+	        var body = str.substr(1, str.length - 2);
+	        return {
+	            value: body,
+	            literal: str
+	        };
+	    };
+	    ;
+	    Scanner.prototype.scanRegExpFlags = function () {
+	        var str = '';
+	        var flags = '';
+	        while (!this.eof()) {
+	            var ch = this.source[this.index];
+	            if (!character_1.Character.isIdentifierPart(ch.charCodeAt(0))) {
+	                break;
+	            }
+	            ++this.index;
+	            if (ch === '\\' && !this.eof()) {
+	                ch = this.source[this.index];
+	                if (ch === 'u') {
+	                    ++this.index;
+	                    var restore = this.index;
+	                    ch = this.scanHexEscape('u');
+	                    if (ch) {
+	                        flags += ch;
+	                        for (str += '\\u'; restore < this.index; ++restore) {
+	                            str += this.source[restore];
+	                        }
+	                    }
+	                    else {
+	                        this.index = restore;
+	                        flags += 'u';
+	                        str += '\\u';
+	                    }
+	                    this.tolerateUnexpectedToken();
+	                }
+	                else {
+	                    str += '\\';
+	                    this.tolerateUnexpectedToken();
+	                }
+	            }
+	            else {
+	                flags += ch;
+	                str += ch;
+	            }
+	        }
+	        return {
+	            value: flags,
+	            literal: str
+	        };
+	    };
+	    ;
+	    Scanner.prototype.scanRegExp = function () {
+	        var start = this.index;
+	        var body = this.scanRegExpBody();
+	        var flags = this.scanRegExpFlags();
+	        var value = this.testRegExp(body.value, flags.value);
+	        return {
+	            type: token_1.Token.RegularExpression,
+	            value: value,
+	            literal: body.literal + flags.literal,
+	            regex: {
+	                pattern: body.value,
+	                flags: flags.value
+	            },
+	            lineNumber: this.lineNumber,
+	            lineStart: this.lineStart,
+	            start: start,
+	            end: this.index
+	        };
+	    };
+	    ;
+	    Scanner.prototype.lex = function () {
+	        if (this.eof()) {
+	            return {
+	                type: token_1.Token.EOF,
+	                lineNumber: this.lineNumber,
+	                lineStart: this.lineStart,
+	                start: this.index,
+	                end: this.index
+	            };
+	        }
+	        var cp = this.source.charCodeAt(this.index);
+	        if (character_1.Character.isIdentifierStart(cp)) {
+	            return this.scanIdentifier();
+	        }
+	        // Very common: ( and ) and ;
+	        if (cp === 0x28 || cp === 0x29 || cp === 0x3B) {
+	            return this.scanPunctuator();
+	        }
+	        // String literal starts with single quote (U+0027) or double quote (U+0022).
+	        if (cp === 0x27 || cp === 0x22) {
+	            return this.scanStringLiteral();
+	        }
+	        // Dot (.) U+002E can also start a floating-point number, hence the need
+	        // to check the next character.
+	        if (cp === 0x2E) {
+	            if (character_1.Character.isDecimalDigit(this.source.charCodeAt(this.index + 1))) {
+	                return this.scanNumericLiteral();
+	            }
+	            return this.scanPunctuator();
+	        }
+	        if (character_1.Character.isDecimalDigit(cp)) {
+	            return this.scanNumericLiteral();
+	        }
+	        // Template literals start with ` (U+0060) for template head
+	        // or } (U+007D) for template middle or template tail.
+	        if (cp === 0x60 || (cp === 0x7D && this.curlyStack[this.curlyStack.length - 1] === '${')) {
+	            return this.scanTemplate();
+	        }
+	        // Possible identifier start in a surrogate pair.
+	        if (cp >= 0xD800 && cp < 0xDFFF) {
+	            if (character_1.Character.isIdentifierStart(this.codePointAt(this.index))) {
+	                return this.scanIdentifier();
+	            }
+	        }
+	        return this.scanPunctuator();
+	    };
+	    ;
+	    return Scanner;
+	}());
+	exports.Scanner = Scanner;
+
+
+/***/ },
+/* 9 */
+/***/ function(module, exports) {
+
+	"use strict";
+	// See also tools/generate-unicode-regex.js.
+	var Regex = {
+	    // Unicode v8.0.0 NonAsciiIdentifierStart:
+	    NonAsciiIdentifierStart: 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+	    // Unicode v8.0.0 NonAsciiIdentifierPart:
+	    NonAsciiIdentifierPart: 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+	};
+	exports.Character = {
+	    fromCodePoint: function (cp) {
+	        return (cp < 0x10000) ? String.fromCharCode(cp) :
+	            String.fromCharCode(0xD800 + ((cp - 0x10000) >> 10)) +
+	                String.fromCharCode(0xDC00 + ((cp - 0x10000) & 1023));
+	    },
+	    // ECMA-262 11.2 White Space
+	    isWhiteSpace: function (cp) {
+	        return (cp === 0x20) || (cp === 0x09) || (cp === 0x0B) || (cp === 0x0C) || (cp === 0xA0) ||
+	            (cp >= 0x1680 && [0x1680, 0x2000, 0x2001, 0x2002, 0x2003, 0x2004, 0x2005, 0x2006, 0x2007, 0x2008, 0x2009, 0x200A, 0x202F, 0x205F, 0x3000, 0xFEFF].indexOf(cp) >= 0);
+	    },
+	    // ECMA-262 11.3 Line Terminators
+	    isLineTerminator: function (cp) {
+	        return (cp === 0x0A) || (cp === 0x0D) || (cp === 0x2028) || (cp === 0x2029);
+	    },
+	    // ECMA-262 11.6 Identifier Names and Identifiers
+	    isIdentifierStart: function (cp) {
+	        return (cp === 0x24) || (cp === 0x5F) ||
+	            (cp >= 0x41 && cp <= 0x5A) ||
+	            (cp >= 0x61 && cp <= 0x7A) ||
+	            (cp === 0x5C) ||
+	            ((cp >= 0x80) && Regex.NonAsciiIdentifierStart.test(exports.Character.fromCodePoint(cp)));
+	    },
+	    isIdentifierPart: function (cp) {
+	        return (cp === 0x24) || (cp === 0x5F) ||
+	            (cp >= 0x41 && cp <= 0x5A) ||
+	            (cp >= 0x61 && cp <= 0x7A) ||
+	            (cp >= 0x30 && cp <= 0x39) ||
+	            (cp === 0x5C) ||
+	            ((cp >= 0x80) && Regex.NonAsciiIdentifierPart.test(exports.Character.fromCodePoint(cp)));
+	    },
+	    // ECMA-262 11.8.3 Numeric Literals
+	    isDecimalDigit: function (cp) {
+	        return (cp >= 0x30 && cp <= 0x39); // 0..9
+	    },
+	    isHexDigit: function (cp) {
+	        return (cp >= 0x30 && cp <= 0x39) ||
+	            (cp >= 0x41 && cp <= 0x46) ||
+	            (cp >= 0x61 && cp <= 0x66); // a..f
+	    },
+	    isOctalDigit: function (cp) {
+	        return (cp >= 0x30 && cp <= 0x37); // 0..7
+	    }
+	};
+
+
+/***/ },
+/* 10 */
+/***/ function(module, exports, __webpack_require__) {
+
+	"use strict";
+	var syntax_1 = __webpack_require__(2);
+	var ArrayExpression = (function () {
+	    function ArrayExpression(elements) {
+	        this.type = syntax_1.Syntax.ArrayExpression;
+	        this.elements = elements;
+	    }
+	    return ArrayExpression;
+	}());
+	exports.ArrayExpression = ArrayExpression;
+	var ArrayPattern = (function () {
+	    function ArrayPattern(elements) {
+	        this.type = syntax_1.Syntax.ArrayPattern;
+	        this.elements = elements;
+	    }
+	    return ArrayPattern;
+	}());
+	exports.ArrayPattern = ArrayPattern;
+	var ArrowFunctionExpression = (function () {
+	    function ArrowFunctionExpression(params, body, expression) {
+	        this.type = syntax_1.Syntax.ArrowFunctionExpression;
+	        this.id = null;
+	        this.params = params;
+	        this.body = body;
+	        this.generator = false;
+	        this.expression = expression;
+	        this.async = false;
+	    }
+	    return ArrowFunctionExpression;
+	}());
+	exports.ArrowFunctionExpression = ArrowFunctionExpression;
+	var AssignmentExpression = (function () {
+	    function AssignmentExpression(operator, left, right) {
+	        this.type = syntax_1.Syntax.AssignmentExpression;
+	        this.operator = operator;
+	        this.left = left;
+	        this.right = right;
+	    }
+	    return AssignmentExpression;
+	}());
+	exports.AssignmentExpression = AssignmentExpression;
+	var AssignmentPattern = (function () {
+	    function AssignmentPattern(left, right) {
+	        this.type = syntax_1.Syntax.AssignmentPattern;
+	        this.left = left;
+	        this.right = right;
+	    }
+	    return AssignmentPattern;
+	}());
+	exports.AssignmentPattern = AssignmentPattern;
+	var AsyncArrowFunctionExpression = (function () {
+	    function AsyncArrowFunctionExpression(params, body, expression) {
+	        this.type = syntax_1.Syntax.ArrowFunctionExpression;
+	        this.id = null;
+	        this.params = params;
+	        this.body = body;
+	        this.generator = false;
+	        this.expression = expression;
+	        this.async = true;
+	    }
+	    return AsyncArrowFunctionExpression;
+	}());
+	exports.AsyncArrowFunctionExpression = AsyncArrowFunctionExpression;
+	var AsyncFunctionDeclaration = (function () {
+	    function AsyncFunctionDeclaration(id, params, body) {
+	        this.type = syntax_1.Syntax.FunctionDeclaration;
+	        this.id = id;
+	        this.params = params;
+	        this.body = body;
+	        this.generator = false;
+	        this.expression = false;
+	        this.async = true;
+	    }
+	    return AsyncFunctionDeclaration;
+	}());
+	exports.AsyncFunctionDeclaration = AsyncFunctionDeclaration;
+	var AsyncFunctionExpression = (function () {
+	    function AsyncFunctionExpression(id, params, body) {
+	        this.type = syntax_1.Syntax.FunctionExpression;
+	        this.id = id;
+	        this.params = params;
+	        this.body = body;
+	        this.generator = false;
+	        this.expression = false;
+	        this.async = true;
+	    }
+	    return AsyncFunctionExpression;
+	}());
+	exports.AsyncFunctionExpression = AsyncFunctionExpression;
+	var AwaitExpression = (function () {
+	    function AwaitExpression(argument) {
+	        this.type = syntax_1.Syntax.AwaitExpression;
+	        this.argument = argument;
+	    }
+	    return AwaitExpression;
+	}());
+	exports.AwaitExpression = AwaitExpression;
+	var BinaryExpression = (function () {
+	    function BinaryExpression(operator, left, right) {
+	        var logical = (operator === '||' || operator === '&&');
+	        this.type = logical ? syntax_1.Syntax.LogicalExpression : syntax_1.Syntax.BinaryExpression;
+	        this.operator = operator;
+	        this.left = left;
+	        this.right = right;
+	    }
+	    return BinaryExpression;
+	}());
+	exports.BinaryExpression = BinaryExpression;
+	var BlockStatement = (function () {
+	    function BlockStatement(body) {
+	        this.type = syntax_1.Syntax.BlockStatement;
+	        this.body = body;
+	    }
+	    return BlockStatement;
+	}());
+	exports.BlockStatement = BlockStatement;
+	var BreakStatement = (function () {
+	    function BreakStatement(label) {
+	        this.type = syntax_1.Syntax.BreakStatement;
+	        this.label = label;
+	    }
+	    return BreakStatement;
+	}());
+	exports.BreakStatement = BreakStatement;
+	var CallExpression = (function () {
+	    function CallExpression(callee, args) {
+	        this.type = syntax_1.Syntax.CallExpression;
+	        this.callee = callee;
+	        this.arguments = args;
+	    }
+	    return CallExpression;
+	}());
+	exports.CallExpression = CallExpression;
+	var CatchClause = (function () {
+	    function CatchClause(param, body) {
+	        this.type = syntax_1.Syntax.CatchClause;
+	        this.param = param;
+	        this.body = body;
+	    }
+	    return CatchClause;
+	}());
+	exports.CatchClause = CatchClause;
+	var ClassBody = (function () {
+	    function ClassBody(body) {
+	        this.type = syntax_1.Syntax.ClassBody;
+	        this.body = body;
+	    }
+	    return ClassBody;
+	}());
+	exports.ClassBody = ClassBody;
+	var ClassDeclaration = (function () {
+	    function ClassDeclaration(id, superClass, body) {
+	        this.type = syntax_1.Syntax.ClassDeclaration;
+	        this.id = id;
+	        this.superClass = superClass;
+	        this.body = body;
+	    }
+	    return ClassDeclaration;
+	}());
+	exports.ClassDeclaration = ClassDeclaration;
+	var ClassExpression = (function () {
+	    function ClassExpression(id, superClass, body) {
+	        this.type = syntax_1.Syntax.ClassExpression;
+	        this.id = id;
+	        this.superClass = superClass;
+	        this.body = body;
+	    }
+	    return ClassExpression;
+	}());
+	exports.ClassExpression = ClassExpression;
+	var ComputedMemberExpression = (function () {
+	    function ComputedMemberExpression(object, property) {
+	        this.type = syntax_1.Syntax.MemberExpression;
+	        this.computed = true;
+	        this.object = object;
+	        this.property = property;
+	    }
+	    return ComputedMemberExpression;
+	}());
+	exports.ComputedMemberExpression = ComputedMemberExpression;
+	var ConditionalExpression = (function () {
+	    function ConditionalExpression(test, consequent, alternate) {
+	        this.type = syntax_1.Syntax.ConditionalExpression;
+	        this.test = test;
+	        this.consequent = consequent;
+	        this.alternate = alternate;
+	    }
+	    return ConditionalExpression;
+	}());
+	exports.ConditionalExpression = ConditionalExpression;
+	var ContinueStatement = (function () {
+	    function ContinueStatement(label) {
+	        this.type = syntax_1.Syntax.ContinueStatement;
+	        this.label = label;
+	    }
+	    return ContinueStatement;
+	}());
+	exports.ContinueStatement = ContinueStatement;
+	var DebuggerStatement = (function () {
+	    function DebuggerStatement() {
+	        this.type = syntax_1.Syntax.DebuggerStatement;
+	    }
+	    return DebuggerStatement;
+	}());
+	exports.DebuggerStatement = DebuggerStatement;
+	var Directive = (function () {
+	    function Directive(expression, directive) {
+	        this.type = syntax_1.Syntax.ExpressionStatement;
+	        this.expression = expression;
+	        this.directive = directive;
+	    }
+	    return Directive;
+	}());
+	exports.Directive = Directive;
+	var DoWhileStatement = (function () {
+	    function DoWhileStatement(body, test) {
+	        this.type = syntax_1.Syntax.DoWhileStatement;
+	        this.body = body;
+	        this.test = test;
+	    }
+	    return DoWhileStatement;
+	}());
+	exports.DoWhileStatement = DoWhileStatement;
+	var EmptyStatement = (function () {
+	    function EmptyStatement() {
+	        this.type = syntax_1.Syntax.EmptyStatement;
+	    }
+	    return EmptyStatement;
+	}());
+	exports.EmptyStatement = EmptyStatement;
+	var ExportAllDeclaration = (function () {
+	    function ExportAllDeclaration(source) {
+	        this.type = syntax_1.Syntax.ExportAllDeclaration;
+	        this.source = source;
+	    }
+	    return ExportAllDeclaration;
+	}());
+	exports.ExportAllDeclaration = ExportAllDeclaration;
+	var ExportDefaultDeclaration = (function () {
+	    function ExportDefaultDeclaration(declaration) {
+	        this.type = syntax_1.Syntax.ExportDefaultDeclaration;
+	        this.declaration = declaration;
+	    }
+	    return ExportDefaultDeclaration;
+	}());
+	exports.ExportDefaultDeclaration = ExportDefaultDeclaration;
+	var ExportNamedDeclaration = (function () {
+	    function ExportNamedDeclaration(declaration, specifiers, source) {
+	        this.type = syntax_1.Syntax.ExportNamedDeclaration;
+	        this.declaration = declaration;
+	        this.specifiers = specifiers;
+	        this.source = source;
+	    }
+	    return ExportNamedDeclaration;
+	}());
+	exports.ExportNamedDeclaration = ExportNamedDeclaration;
+	var ExportSpecifier = (function () {
+	    function ExportSpecifier(local, exported) {
+	        this.type = syntax_1.Syntax.ExportSpecifier;
+	        this.exported = exported;
+	        this.local = local;
+	    }
+	    return ExportSpecifier;
+	}());
+	exports.ExportSpecifier = ExportSpecifier;
+	var ExpressionStatement = (function () {
+	    function ExpressionStatement(expression) {
+	        this.type = syntax_1.Syntax.ExpressionStatement;
+	        this.expression = expression;
+	    }
+	    return ExpressionStatement;
+	}());
+	exports.ExpressionStatement = ExpressionStatement;
+	var ForInStatement = (function () {
+	    function ForInStatement(left, right, body) {
+	        this.type = syntax_1.Syntax.ForInStatement;
+	        this.left = left;
+	        this.right = right;
+	        this.body = body;
+	        this.each = false;
+	    }
+	    return ForInStatement;
+	}());
+	exports.ForInStatement = ForInStatement;
+	var ForOfStatement = (function () {
+	    function ForOfStatement(left, right, body) {
+	        this.type = syntax_1.Syntax.ForOfStatement;
+	        this.left = left;
+	        this.right = right;
+	        this.body = body;
+	    }
+	    return ForOfStatement;
+	}());
+	exports.ForOfStatement = ForOfStatement;
+	var ForStatement = (function () {
+	    function ForStatement(init, test, update, body) {
+	        this.type = syntax_1.Syntax.ForStatement;
+	        this.init = init;
+	        this.test = test;
+	        this.update = update;
+	        this.body = body;
+	    }
+	    return ForStatement;
+	}());
+	exports.ForStatement = ForStatement;
+	var FunctionDeclaration = (function () {
+	    function FunctionDeclaration(id, params, body, generator) {
+	        this.type = syntax_1.Syntax.FunctionDeclaration;
+	        this.id = id;
+	        this.params = params;
+	        this.body = body;
+	        this.generator = generator;
+	        this.expression = false;
+	        this.async = false;
+	    }
+	    return FunctionDeclaration;
+	}());
+	exports.FunctionDeclaration = FunctionDeclaration;
+	var FunctionExpression = (function () {
+	    function FunctionExpression(id, params, body, generator) {
+	        this.type = syntax_1.Syntax.FunctionExpression;
+	        this.id = id;
+	        this.params = params;
+	        this.body = body;
+	        this.generator = generator;
+	        this.expression = false;
+	        this.async = false;
+	    }
+	    return FunctionExpression;
+	}());
+	exports.FunctionExpression = FunctionExpression;
+	var Identifier = (function () {
+	    function Identifier(name) {
+	        this.type = syntax_1.Syntax.Identifier;
+	        this.name = name;
+	    }
+	    return Identifier;
+	}());
+	exports.Identifier = Identifier;
+	var IfStatement = (function () {
+	    function IfStatement(test, consequent, alternate) {
+	        this.type = syntax_1.Syntax.IfStatement;
+	        this.test = test;
+	        this.consequent = consequent;
+	        this.alternate = alternate;
+	    }
+	    return IfStatement;
+	}());
+	exports.IfStatement = IfStatement;
+	var ImportDeclaration = (function () {
+	    function ImportDeclaration(specifiers, source) {
+	        this.type = syntax_1.Syntax.ImportDeclaration;
+	        this.specifiers = specifiers;
+	        this.source = source;
+	    }
+	    return ImportDeclaration;
+	}());
+	exports.ImportDeclaration = ImportDeclaration;
+	var ImportDefaultSpecifier = (function () {
+	    function ImportDefaultSpecifier(local) {
+	        this.type = syntax_1.Syntax.ImportDefaultSpecifier;
+	        this.local = local;
+	    }
+	    return ImportDefaultSpecifier;
+	}());
+	exports.ImportDefaultSpecifier = ImportDefaultSpecifier;
+	var ImportNamespaceSpecifier = (function () {
+	    function ImportNamespaceSpecifier(local) {
+	        this.type = syntax_1.Syntax.ImportNamespaceSpecifier;
+	        this.local = local;
+	    }
+	    return ImportNamespaceSpecifier;
+	}());
+	exports.ImportNamespaceSpecifier = ImportNamespaceSpecifier;
+	var ImportSpecifier = (function () {
+	    function ImportSpecifier(local, imported) {
+	        this.type = syntax_1.Syntax.ImportSpecifier;
+	        this.local = local;
+	        this.imported = imported;
+	    }
+	    return ImportSpecifier;
+	}());
+	exports.ImportSpecifier = ImportSpecifier;
+	var LabeledStatement = (function () {
+	    function LabeledStatement(label, body) {
+	        this.type = syntax_1.Syntax.LabeledStatement;
+	        this.label = label;
+	        this.body = body;
+	    }
+	    return LabeledStatement;
+	}());
+	exports.LabeledStatement = LabeledStatement;
+	var Literal = (function () {
+	    function Literal(value, raw) {
+	        this.type = syntax_1.Syntax.Literal;
+	        this.value = value;
+	        this.raw = raw;
+	    }
+	    return Literal;
+	}());
+	exports.Literal = Literal;
+	var MetaProperty = (function () {
+	    function MetaProperty(meta, property) {
+	        this.type = syntax_1.Syntax.MetaProperty;
+	        this.meta = meta;
+	        this.property = property;
+	    }
+	    return MetaProperty;
+	}());
+	exports.MetaProperty = MetaProperty;
+	var MethodDefinition = (function () {
+	    function MethodDefinition(key, computed, value, kind, isStatic) {
+	        this.type = syntax_1.Syntax.MethodDefinition;
+	        this.key = key;
+	        this.computed = computed;
+	        this.value = value;
+	        this.kind = kind;
+	        this.static = isStatic;
+	    }
+	    return MethodDefinition;
+	}());
+	exports.MethodDefinition = MethodDefinition;
+	var Module = (function () {
+	    function Module(body) {
+	        this.type = syntax_1.Syntax.Program;
+	        this.body = body;
+	        this.sourceType = 'module';
+	    }
+	    return Module;
+	}());
+	exports.Module = Module;
+	var NewExpression = (function () {
+	    function NewExpression(callee, args) {
+	        this.type = syntax_1.Syntax.NewExpression;
+	        this.callee = callee;
+	        this.arguments = args;
+	    }
+	    return NewExpression;
+	}());
+	exports.NewExpression = NewExpression;
+	var ObjectExpression = (function () {
+	    function ObjectExpression(properties) {
+	        this.type = syntax_1.Syntax.ObjectExpression;
+	        this.properties = properties;
+	    }
+	    return ObjectExpression;
+	}());
+	exports.ObjectExpression = ObjectExpression;
+	var ObjectPattern = (function () {
+	    function ObjectPattern(properties) {
+	        this.type = syntax_1.Syntax.ObjectPattern;
+	        this.properties = properties;
+	    }
+	    return ObjectPattern;
+	}());
+	exports.ObjectPattern = ObjectPattern;
+	var Property = (function () {
+	    function Property(kind, key, computed, value, method, shorthand) {
+	        this.type = syntax_1.Syntax.Property;
+	        this.key = key;
+	        this.computed = computed;
+	        this.value = value;
+	        this.kind = kind;
+	        this.method = method;
+	        this.shorthand = shorthand;
+	    }
+	    return Property;
+	}());
+	exports.Property = Property;
+	var RegexLiteral = (function () {
+	    function RegexLiteral(value, raw, regex) {
+	        this.type = syntax_1.Syntax.Literal;
+	        this.value = value;
+	        this.raw = raw;
+	        this.regex = regex;
+	    }
+	    return RegexLiteral;
+	}());
+	exports.RegexLiteral = RegexLiteral;
+	var RestElement = (function () {
+	    function RestElement(argument) {
+	        this.type = syntax_1.Syntax.RestElement;
+	        this.argument = argument;
+	    }
+	    return RestElement;
+	}());
+	exports.RestElement = RestElement;
+	var ReturnStatement = (function () {
+	    function ReturnStatement(argument) {
+	        this.type = syntax_1.Syntax.ReturnStatement;
+	        this.argument = argument;
+	    }
+	    return ReturnStatement;
+	}());
+	exports.ReturnStatement = ReturnStatement;
+	var Script = (function () {
+	    function Script(body) {
+	        this.type = syntax_1.Syntax.Program;
+	        this.body = body;
+	        this.sourceType = 'script';
+	    }
+	    return Script;
+	}());
+	exports.Script = Script;
+	var SequenceExpression = (function () {
+	    function SequenceExpression(expressions) {
+	        this.type = syntax_1.Syntax.SequenceExpression;
+	        this.expressions = expressions;
+	    }
+	    return SequenceExpression;
+	}());
+	exports.SequenceExpression = SequenceExpression;
+	var SpreadElement = (function () {
+	    function SpreadElement(argument) {
+	        this.type = syntax_1.Syntax.SpreadElement;
+	        this.argument = argument;
+	    }
+	    return SpreadElement;
+	}());
+	exports.SpreadElement = SpreadElement;
+	var StaticMemberExpression = (function () {
+	    function StaticMemberExpression(object, property) {
+	        this.type = syntax_1.Syntax.MemberExpression;
+	        this.computed = false;
+	        this.object = object;
+	        this.property = property;
+	    }
+	    return StaticMemberExpression;
+	}());
+	exports.StaticMemberExpression = StaticMemberExpression;
+	var Super = (function () {
+	    function Super() {
+	        this.type = syntax_1.Syntax.Super;
+	    }
+	    return Super;
+	}());
+	exports.Super = Super;
+	var SwitchCase = (function () {
+	    function SwitchCase(test, consequent) {
+	        this.type = syntax_1.Syntax.SwitchCase;
+	        this.test = test;
+	        this.consequent = consequent;
+	    }
+	    return SwitchCase;
+	}());
+	exports.SwitchCase = SwitchCase;
+	var SwitchStatement = (function () {
+	    function SwitchStatement(discriminant, cases) {
+	        this.type = syntax_1.Syntax.SwitchStatement;
+	        this.discriminant = discriminant;
+	        this.cases = cases;
+	    }
+	    return SwitchStatement;
+	}());
+	exports.SwitchStatement = SwitchStatement;
+	var TaggedTemplateExpression = (function () {
+	    function TaggedTemplateExpression(tag, quasi) {
+	        this.type = syntax_1.Syntax.TaggedTemplateExpression;
+	        this.tag = tag;
+	        this.quasi = quasi;
+	    }
+	    return TaggedTemplateExpression;
+	}());
+	exports.TaggedTemplateExpression = TaggedTemplateExpression;
+	var TemplateElement = (function () {
+	    function TemplateElement(value, tail) {
+	        this.type = syntax_1.Syntax.TemplateElement;
+	        this.value = value;
+	        this.tail = tail;
+	    }
+	    return TemplateElement;
+	}());
+	exports.TemplateElement = TemplateElement;
+	var TemplateLiteral = (function () {
+	    function TemplateLiteral(quasis, expressions) {
+	        this.type = syntax_1.Syntax.TemplateLiteral;
+	        this.quasis = quasis;
+	        this.expressions = expressions;
+	    }
+	    return TemplateLiteral;
+	}());
+	exports.TemplateLiteral = TemplateLiteral;
+	var ThisExpression = (function () {
+	    function ThisExpression() {
+	        this.type = syntax_1.Syntax.ThisExpression;
+	    }
+	    return ThisExpression;
+	}());
+	exports.ThisExpression = ThisExpression;
+	var ThrowStatement = (function () {
+	    function ThrowStatement(argument) {
+	        this.type = syntax_1.Syntax.ThrowStatement;
+	        this.argument = argument;
+	    }
+	    return ThrowStatement;
+	}());
+	exports.ThrowStatement = ThrowStatement;
+	var TryStatement = (function () {
+	    function TryStatement(block, handler, finalizer) {
+	        this.type = syntax_1.Syntax.TryStatement;
+	        this.block = block;
+	        this.handler = handler;
+	        this.finalizer = finalizer;
+	    }
+	    return TryStatement;
+	}());
+	exports.TryStatement = TryStatement;
+	var UnaryExpression = (function () {
+	    function UnaryExpression(operator, argument) {
+	        this.type = syntax_1.Syntax.UnaryExpression;
+	        this.operator = operator;
+	        this.argument = argument;
+	        this.prefix = true;
+	    }
+	    return UnaryExpression;
+	}());
+	exports.UnaryExpression = UnaryExpression;
+	var UpdateExpression = (function () {
+	    function UpdateExpression(operator, argument, prefix) {
+	        this.type = syntax_1.Syntax.UpdateExpression;
+	        this.operator = operator;
+	        this.argument = argument;
+	        this.prefix = prefix;
+	    }
+	    return UpdateExpression;
+	}());
+	exports.UpdateExpression = UpdateExpression;
+	var VariableDeclaration = (function () {
+	    function VariableDeclaration(declarations, kind) {
+	        this.type = syntax_1.Syntax.VariableDeclaration;
+	        this.declarations = declarations;
+	        this.kind = kind;
+	    }
+	    return VariableDeclaration;
+	}());
+	exports.VariableDeclaration = VariableDeclaration;
+	var VariableDeclarator = (function () {
+	    function VariableDeclarator(id, init) {
+	        this.type = syntax_1.Syntax.VariableDeclarator;
+	        this.id = id;
+	        this.init = init;
+	    }
+	    return VariableDeclarator;
+	}());
+	exports.VariableDeclarator = VariableDeclarator;
+	var WhileStatement = (function () {
+	    function WhileStatement(test, body) {
+	        this.type = syntax_1.Syntax.WhileStatement;
+	        this.test = test;
+	        this.body = body;
+	    }
+	    return WhileStatement;
+	}());
+	exports.WhileStatement = WhileStatement;
+	var WithStatement = (function () {
+	    function WithStatement(object, body) {
+	        this.type = syntax_1.Syntax.WithStatement;
+	        this.object = object;
+	        this.body = body;
+	    }
+	    return WithStatement;
+	}());
+	exports.WithStatement = WithStatement;
+	var YieldExpression = (function () {
+	    function YieldExpression(argument, delegate) {
+	        this.type = syntax_1.Syntax.YieldExpression;
+	        this.argument = argument;
+	        this.delegate = delegate;
+	    }
+	    return YieldExpression;
+	}());
+	exports.YieldExpression = YieldExpression;
+
+
+/***/ },
+/* 11 */
+/***/ function(module, exports, __webpack_require__) {
+
+	"use strict";
+/* istanbul ignore next */
+	var __extends = (this && this.__extends) || function (d, b) {
+	    for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p];
+	    function __() { this.constructor = d; }
+	    d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
+	};
+	var character_1 = __webpack_require__(9);
+	var token_1 = __webpack_require__(7);
+	var parser_1 = __webpack_require__(3);
+	var xhtml_entities_1 = __webpack_require__(12);
+	var jsx_syntax_1 = __webpack_require__(13);
+	var Node = __webpack_require__(10);
+	var JSXNode = __webpack_require__(14);
+	var JSXToken;
+	(function (JSXToken) {
+	    JSXToken[JSXToken["Identifier"] = 100] = "Identifier";
+	    JSXToken[JSXToken["Text"] = 101] = "Text";
+	})(JSXToken || (JSXToken = {}));
+	token_1.TokenName[JSXToken.Identifier] = 'JSXIdentifier';
+	token_1.TokenName[JSXToken.Text] = 'JSXText';
+	// Fully qualified element name, e.g. <svg:path> returns "svg:path"
+	function getQualifiedElementName(elementName) {
+	    var qualifiedName;
+	    switch (elementName.type) {
+	        case jsx_syntax_1.JSXSyntax.JSXIdentifier:
+	            var id = (elementName);
+	            qualifiedName = id.name;
+	            break;
+	        case jsx_syntax_1.JSXSyntax.JSXNamespacedName:
+	            var ns = (elementName);
+	            qualifiedName = getQualifiedElementName(ns.namespace) + ':' +
+	                getQualifiedElementName(ns.name);
+	            break;
+	        case jsx_syntax_1.JSXSyntax.JSXMemberExpression:
+	            var expr = (elementName);
+	            qualifiedName = getQualifiedElementName(expr.object) + '.' +
+	                getQualifiedElementName(expr.property);
+	            break;
+	    }
+	    return qualifiedName;
+	}
+	var JSXParser = (function (_super) {
+	    __extends(JSXParser, _super);
+	    function JSXParser(code, options, delegate) {
+	        _super.call(this, code, options, delegate);
+	    }
+	    JSXParser.prototype.parsePrimaryExpression = function () {
+	        return this.match('<') ? this.parseJSXRoot() : _super.prototype.parsePrimaryExpression.call(this);
+	    };
+	    JSXParser.prototype.startJSX = function () {
+	        // Unwind the scanner before the lookahead token.
+	        this.scanner.index = this.startMarker.index;
+	        this.scanner.lineNumber = this.startMarker.lineNumber;
+	        this.scanner.lineStart = this.startMarker.lineStart;
+	    };
+	    JSXParser.prototype.finishJSX = function () {
+	        // Prime the next lookahead.
+	        this.nextToken();
+	    };
+	    JSXParser.prototype.reenterJSX = function () {
+	        this.startJSX();
+	        this.expectJSX('}');
+	        // Pop the closing '}' added from the lookahead.
+	        if (this.config.tokens) {
+	            this.tokens.pop();
+	        }
+	    };
+	    JSXParser.prototype.createJSXNode = function () {
+	        this.collectComments();
+	        return {
+	            index: this.scanner.index,
+	            line: this.scanner.lineNumber,
+	            column: this.scanner.index - this.scanner.lineStart
+	        };
+	    };
+	    JSXParser.prototype.createJSXChildNode = function () {
+	        return {
+	            index: this.scanner.index,
+	            line: this.scanner.lineNumber,
+	            column: this.scanner.index - this.scanner.lineStart
+	        };
+	    };
+	    JSXParser.prototype.scanXHTMLEntity = function () {
+	        var result = '&';
+	        var str = '';
+	        while (!this.scanner.eof()) {
+	            var ch = this.scanner.source[this.scanner.index++];
+	            if (ch === ';') {
+	                if (str[0] === '#') {
+	                    str = str.substr(1);
+	                    var hex = (str[0] === 'x');
+	                    var cp = hex ? parseInt('0' + str, 16) : parseInt(str, 10);
+	                    result = String.fromCharCode(cp);
+	                }
+	                else if (xhtml_entities_1.XHTMLEntities[str]) {
+	                    result = xhtml_entities_1.XHTMLEntities[str];
+	                }
+	                else {
+	                    result += ch;
+	                }
+	                break;
+	            }
+	            str += ch;
+	            result += ch;
+	        }
+	        return result;
+	    };
+	    // Scan the next JSX token. This replaces Scanner#lex when in JSX mode.
+	    JSXParser.prototype.lexJSX = function () {
+	        var cp = this.scanner.source.charCodeAt(this.scanner.index);
+	        // < > / : = { }
+	        if (cp === 60 || cp === 62 || cp === 47 || cp === 58 || cp === 61 || cp === 123 || cp === 125) {
+	            var value = this.scanner.source[this.scanner.index++];
+	            return {
+	                type: token_1.Token.Punctuator,
+	                value: value,
+	                lineNumber: this.scanner.lineNumber,
+	                lineStart: this.scanner.lineStart,
+	                start: this.scanner.index - 1,
+	                end: this.scanner.index
+	            };
+	        }
+	        // " '
+	        if (cp === 34 || cp === 39) {
+	            var start = this.scanner.index;
+	            var quote = this.scanner.source[this.scanner.index++];
+	            var str = '';
+	            while (!this.scanner.eof()) {
+	                var ch = this.scanner.source[this.scanner.index++];
+	                if (ch === quote) {
+	                    break;
+	                }
+	                else if (ch === '&') {
+	                    str += this.scanXHTMLEntity();
+	                }
+	                else {
+	                    str += ch;
+	                }
+	            }
+	            return {
+	                type: token_1.Token.StringLiteral,
+	                value: str,
+	                lineNumber: this.scanner.lineNumber,
+	                lineStart: this.scanner.lineStart,
+	                start: start,
+	                end: this.scanner.index
+	            };
+	        }
+	        // ... or .
+	        if (cp === 46) {
+	            var n1 = this.scanner.source.charCodeAt(this.scanner.index + 1);
+	            var n2 = this.scanner.source.charCodeAt(this.scanner.index + 2);
+	            var value = (n1 === 46 && n2 === 46) ? '...' : '.';
+	            var start = this.scanner.index;
+	            this.scanner.index += value.length;
+	            return {
+	                type: token_1.Token.Punctuator,
+	                value: value,
+	                lineNumber: this.scanner.lineNumber,
+	                lineStart: this.scanner.lineStart,
+	                start: start,
+	                end: this.scanner.index
+	            };
+	        }
+	        // Identifer can not contain backslash (char code 92).
+	        if (character_1.Character.isIdentifierStart(cp) && (cp !== 92)) {
+	            var start = this.scanner.index;
+	            ++this.scanner.index;
+	            while (!this.scanner.eof()) {
+	                var ch = this.scanner.source.charCodeAt(this.scanner.index);
+	                if (character_1.Character.isIdentifierPart(ch) && (ch !== 92)) {
+	                    ++this.scanner.index;
+	                }
+	                else if (ch === 45) {
+	                    // Hyphen (char code 45) can be part of an identifier.
+	                    ++this.scanner.index;
+	                }
+	                else {
+	                    break;
+	                }
+	            }
+	            var id = this.scanner.source.slice(start, this.scanner.index);
+	            return {
+	                type: JSXToken.Identifier,
+	                value: id,
+	                lineNumber: this.scanner.lineNumber,
+	                lineStart: this.scanner.lineStart,
+	                start: start,
+	                end: this.scanner.index
+	            };
+	        }
+	        this.scanner.throwUnexpectedToken();
+	    };
+	    JSXParser.prototype.nextJSXToken = function () {
+	        this.collectComments();
+	        this.startMarker.index = this.scanner.index;
+	        this.startMarker.lineNumber = this.scanner.lineNumber;
+	        this.startMarker.lineStart = this.scanner.lineStart;
+	        var token = this.lexJSX();
+	        this.lastMarker.index = this.scanner.index;
+	        this.lastMarker.lineNumber = this.scanner.lineNumber;
+	        this.lastMarker.lineStart = this.scanner.lineStart;
+	        if (this.config.tokens) {
+	            this.tokens.push(this.convertToken(token));
+	        }
+	        return token;
+	    };
+	    JSXParser.prototype.nextJSXText = function () {
+	        this.startMarker.index = this.scanner.index;
+	        this.startMarker.lineNumber = this.scanner.lineNumber;
+	        this.startMarker.lineStart = this.scanner.lineStart;
+	        var start = this.scanner.index;
+	        var text = '';
+	        while (!this.scanner.eof()) {
+	            var ch = this.scanner.source[this.scanner.index];
+	            if (ch === '{' || ch === '<') {
+	                break;
+	            }
+	            ++this.scanner.index;
+	            text += ch;
+	            if (character_1.Character.isLineTerminator(ch.charCodeAt(0))) {
+	                ++this.scanner.lineNumber;
+	                if (ch === '\r' && this.scanner.source[this.scanner.index] === '\n') {
+	                    ++this.scanner.index;
+	                }
+	                this.scanner.lineStart = this.scanner.index;
+	            }
+	        }
+	        this.lastMarker.index = this.scanner.index;
+	        this.lastMarker.lineNumber = this.scanner.lineNumber;
+	        this.lastMarker.lineStart = this.scanner.lineStart;
+	        var token = {
+	            type: JSXToken.Text,
+	            value: text,
+	            lineNumber: this.scanner.lineNumber,
+	            lineStart: this.scanner.lineStart,
+	            start: start,
+	            end: this.scanner.index
+	        };
+	        if ((text.length > 0) && this.config.tokens) {
+	            this.tokens.push(this.convertToken(token));
+	        }
+	        return token;
+	    };
+	    JSXParser.prototype.peekJSXToken = function () {
+	        var previousIndex = this.scanner.index;
+	        var previousLineNumber = this.scanner.lineNumber;
+	        var previousLineStart = this.scanner.lineStart;
+	        this.scanner.scanComments();
+	        var next = this.lexJSX();
+	        this.scanner.index = previousIndex;
+	        this.scanner.lineNumber = previousLineNumber;
+	        this.scanner.lineStart = previousLineStart;
+	        return next;
+	    };
+	    // Expect the next JSX token to match the specified punctuator.
+	    // If not, an exception will be thrown.
+	    JSXParser.prototype.expectJSX = function (value) {
+	        var token = this.nextJSXToken();
+	        if (token.type !== token_1.Token.Punctuator || token.value !== value) {
+	            this.throwUnexpectedToken(token);
+	        }
+	    };
+	    // Return true if the next JSX token matches the specified punctuator.
+	    JSXParser.prototype.matchJSX = function (value) {
+	        var next = this.peekJSXToken();
+	        return next.type === token_1.Token.Punctuator && next.value === value;
+	    };
+	    JSXParser.prototype.parseJSXIdentifier = function () {
+	        var node = this.createJSXNode();
+	        var token = this.nextJSXToken();
+	        if (token.type !== JSXToken.Identifier) {
+	            this.throwUnexpectedToken(token);
+	        }
+	        return this.finalize(node, new JSXNode.JSXIdentifier(token.value));
+	    };
+	    JSXParser.prototype.parseJSXElementName = function () {
+	        var node = this.createJSXNode();
+	        var elementName = this.parseJSXIdentifier();
+	        if (this.matchJSX(':')) {
+	            var namespace = elementName;
+	            this.expectJSX(':');
+	            var name_1 = this.parseJSXIdentifier();
+	            elementName = this.finalize(node, new JSXNode.JSXNamespacedName(namespace, name_1));
+	        }
+	        else if (this.matchJSX('.')) {
+	            while (this.matchJSX('.')) {
+	                var object = elementName;
+	                this.expectJSX('.');
+	                var property = this.parseJSXIdentifier();
+	                elementName = this.finalize(node, new JSXNode.JSXMemberExpression(object, property));
+	            }
+	        }
+	        return elementName;
+	    };
+	    JSXParser.prototype.parseJSXAttributeName = function () {
+	        var node = this.createJSXNode();
+	        var attributeName;
+	        var identifier = this.parseJSXIdentifier();
+	        if (this.matchJSX(':')) {
+	            var namespace = identifier;
+	            this.expectJSX(':');
+	            var name_2 = this.parseJSXIdentifier();
+	            attributeName = this.finalize(node, new JSXNode.JSXNamespacedName(namespace, name_2));
+	        }
+	        else {
+	            attributeName = identifier;
+	        }
+	        return attributeName;
+	    };
+	    JSXParser.prototype.parseJSXStringLiteralAttribute = function () {
+	        var node = this.createJSXNode();
+	        var token = this.nextJSXToken();
+	        if (token.type !== token_1.Token.StringLiteral) {
+	            this.throwUnexpectedToken(token);
+	        }
+	        var raw = this.getTokenRaw(token);
+	        return this.finalize(node, new Node.Literal(token.value, raw));
+	    };
+	    JSXParser.prototype.parseJSXExpressionAttribute = function () {
+	        var node = this.createJSXNode();
+	        this.expectJSX('{');
+	        this.finishJSX();
+	        if (this.match('}')) {
+	            this.tolerateError('JSX attributes must only be assigned a non-empty expression');
+	        }
+	        var expression = this.parseAssignmentExpression();
+	        this.reenterJSX();
+	        return this.finalize(node, new JSXNode.JSXExpressionContainer(expression));
+	    };
+	    JSXParser.prototype.parseJSXAttributeValue = function () {
+	        return this.matchJSX('{') ? this.parseJSXExpressionAttribute() :
+	            this.matchJSX('<') ? this.parseJSXElement() : this.parseJSXStringLiteralAttribute();
+	    };
+	    JSXParser.prototype.parseJSXNameValueAttribute = function () {
+	        var node = this.createJSXNode();
+	        var name = this.parseJSXAttributeName();
+	        var value = null;
+	        if (this.matchJSX('=')) {
+	            this.expectJSX('=');
+	            value = this.parseJSXAttributeValue();
+	        }
+	        return this.finalize(node, new JSXNode.JSXAttribute(name, value));
+	    };
+	    JSXParser.prototype.parseJSXSpreadAttribute = function () {
+	        var node = this.createJSXNode();
+	        this.expectJSX('{');
+	        this.expectJSX('...');
+	        this.finishJSX();
+	        var argument = this.parseAssignmentExpression();
+	        this.reenterJSX();
+	        return this.finalize(node, new JSXNode.JSXSpreadAttribute(argument));
+	    };
+	    JSXParser.prototype.parseJSXAttributes = function () {
+	        var attributes = [];
+	        while (!this.matchJSX('/') && !this.matchJSX('>')) {
+	            var attribute = this.matchJSX('{') ? this.parseJSXSpreadAttribute() :
+	                this.parseJSXNameValueAttribute();
+	            attributes.push(attribute);
+	        }
+	        return attributes;
+	    };
+	    JSXParser.prototype.parseJSXOpeningElement = function () {
+	        var node = this.createJSXNode();
+	        this.expectJSX('<');
+	        var name = this.parseJSXElementName();
+	        var attributes = this.parseJSXAttributes();
+	        var selfClosing = this.matchJSX('/');
+	        if (selfClosing) {
+	            this.expectJSX('/');
+	        }
+	        this.expectJSX('>');
+	        return this.finalize(node, new JSXNode.JSXOpeningElement(name, selfClosing, attributes));
+	    };
+	    JSXParser.prototype.parseJSXBoundaryElement = function () {
+	        var node = this.createJSXNode();
+	        this.expectJSX('<');
+	        if (this.matchJSX('/')) {
+	            this.expectJSX('/');
+	            var name_3 = this.parseJSXElementName();
+	            this.expectJSX('>');
+	            return this.finalize(node, new JSXNode.JSXClosingElement(name_3));
+	        }
+	        var name = this.parseJSXElementName();
+	        var attributes = this.parseJSXAttributes();
+	        var selfClosing = this.matchJSX('/');
+	        if (selfClosing) {
+	            this.expectJSX('/');
+	        }
+	        this.expectJSX('>');
+	        return this.finalize(node, new JSXNode.JSXOpeningElement(name, selfClosing, attributes));
+	    };
+	    JSXParser.prototype.parseJSXEmptyExpression = function () {
+	        var node = this.createJSXChildNode();
+	        this.collectComments();
+	        this.lastMarker.index = this.scanner.index;
+	        this.lastMarker.lineNumber = this.scanner.lineNumber;
+	        this.lastMarker.lineStart = this.scanner.lineStart;
+	        return this.finalize(node, new JSXNode.JSXEmptyExpression());
+	    };
+	    JSXParser.prototype.parseJSXExpressionContainer = function () {
+	        var node = this.createJSXNode();
+	        this.expectJSX('{');
+	        var expression;
+	        if (this.matchJSX('}')) {
+	            expression = this.parseJSXEmptyExpression();
+	            this.expectJSX('}');
+	        }
+	        else {
+	            this.finishJSX();
+	            expression = this.parseAssignmentExpression();
+	            this.reenterJSX();
+	        }
+	        return this.finalize(node, new JSXNode.JSXExpressionContainer(expression));
+	    };
+	    JSXParser.prototype.parseJSXChildren = function () {
+	        var children = [];
+	        while (!this.scanner.eof()) {
+	            var node = this.createJSXChildNode();
+	            var token = this.nextJSXText();
+	            if (token.start < token.end) {
+	                var raw = this.getTokenRaw(token);
+	                var child = this.finalize(node, new JSXNode.JSXText(token.value, raw));
+	                children.push(child);
+	            }
+	            if (this.scanner.source[this.scanner.index] === '{') {
+	                var container = this.parseJSXExpressionContainer();
+	                children.push(container);
+	            }
+	            else {
+	                break;
+	            }
+	        }
+	        return children;
+	    };
+	    JSXParser.prototype.parseComplexJSXElement = function (el) {
+	        var stack = [];
+	        while (!this.scanner.eof()) {
+	            el.children = el.children.concat(this.parseJSXChildren());
+	            var node = this.createJSXChildNode();
+	            var element = this.parseJSXBoundaryElement();
+	            if (element.type === jsx_syntax_1.JSXSyntax.JSXOpeningElement) {
+	                var opening = (element);
+	                if (opening.selfClosing) {
+	                    var child = this.finalize(node, new JSXNode.JSXElement(opening, [], null));
+	                    el.children.push(child);
+	                }
+	                else {
+	                    stack.push(el);
+	                    el = { node: node, opening: opening, closing: null, children: [] };
+	                }
+	            }
+	            if (element.type === jsx_syntax_1.JSXSyntax.JSXClosingElement) {
+	                el.closing = (element);
+	                var open_1 = getQualifiedElementName(el.opening.name);
+	                var close_1 = getQualifiedElementName(el.closing.name);
+	                if (open_1 !== close_1) {
+	                    this.tolerateError('Expected corresponding JSX closing tag for %0', open_1);
+	                }
+	                if (stack.length > 0) {
+	                    var child = this.finalize(el.node, new JSXNode.JSXElement(el.opening, el.children, el.closing));
+	                    el = stack[stack.length - 1];
+	                    el.children.push(child);
+	                    stack.pop();
+	                }
+	                else {
+	                    break;
+	                }
+	            }
+	        }
+	        return el;
+	    };
+	    JSXParser.prototype.parseJSXElement = function () {
+	        var node = this.createJSXNode();
+	        var opening = this.parseJSXOpeningElement();
+	        var children = [];
+	        var closing = null;
+	        if (!opening.selfClosing) {
+	            var el = this.parseComplexJSXElement({ node: node, opening: opening, closing: closing, children: children });
+	            children = el.children;
+	            closing = el.closing;
+	        }
+	        return this.finalize(node, new JSXNode.JSXElement(opening, children, closing));
+	    };
+	    JSXParser.prototype.parseJSXRoot = function () {
+	        // Pop the opening '<' added from the lookahead.
+	        if (this.config.tokens) {
+	            this.tokens.pop();
+	        }
+	        this.startJSX();
+	        var element = this.parseJSXElement();
+	        this.finishJSX();
+	        return element;
+	    };
+	    return JSXParser;
+	}(parser_1.Parser));
+	exports.JSXParser = JSXParser;
+
+
+/***/ },
+/* 12 */
+/***/ function(module, exports) {
+
+	// Generated by generate-xhtml-entities.js. DO NOT MODIFY!
+	"use strict";
+	exports.XHTMLEntities = {
+	    quot: '\u0022',
+	    amp: '\u0026',
+	    apos: '\u0027',
+	    gt: '\u003E',
+	    nbsp: '\u00A0',
+	    iexcl: '\u00A1',
+	    cent: '\u00A2',
+	    pound: '\u00A3',
+	    curren: '\u00A4',
+	    yen: '\u00A5',
+	    brvbar: '\u00A6',
+	    sect: '\u00A7',
+	    uml: '\u00A8',
+	    copy: '\u00A9',
+	    ordf: '\u00AA',
+	    laquo: '\u00AB',
+	    not: '\u00AC',
+	    shy: '\u00AD',
+	    reg: '\u00AE',
+	    macr: '\u00AF',
+	    deg: '\u00B0',
+	    plusmn: '\u00B1',
+	    sup2: '\u00B2',
+	    sup3: '\u00B3',
+	    acute: '\u00B4',
+	    micro: '\u00B5',
+	    para: '\u00B6',
+	    middot: '\u00B7',
+	    cedil: '\u00B8',
+	    sup1: '\u00B9',
+	    ordm: '\u00BA',
+	    raquo: '\u00BB',
+	    frac14: '\u00BC',
+	    frac12: '\u00BD',
+	    frac34: '\u00BE',
+	    iquest: '\u00BF',
+	    Agrave: '\u00C0',
+	    Aacute: '\u00C1',
+	    Acirc: '\u00C2',
+	    Atilde: '\u00C3',
+	    Auml: '\u00C4',
+	    Aring: '\u00C5',
+	    AElig: '\u00C6',
+	    Ccedil: '\u00C7',
+	    Egrave: '\u00C8',
+	    Eacute: '\u00C9',
+	    Ecirc: '\u00CA',
+	    Euml: '\u00CB',
+	    Igrave: '\u00CC',
+	    Iacute: '\u00CD',
+	    Icirc: '\u00CE',
+	    Iuml: '\u00CF',
+	    ETH: '\u00D0',
+	    Ntilde: '\u00D1',
+	    Ograve: '\u00D2',
+	    Oacute: '\u00D3',
+	    Ocirc: '\u00D4',
+	    Otilde: '\u00D5',
+	    Ouml: '\u00D6',
+	    times: '\u00D7',
+	    Oslash: '\u00D8',
+	    Ugrave: '\u00D9',
+	    Uacute: '\u00DA',
+	    Ucirc: '\u00DB',
+	    Uuml: '\u00DC',
+	    Yacute: '\u00DD',
+	    THORN: '\u00DE',
+	    szlig: '\u00DF',
+	    agrave: '\u00E0',
+	    aacute: '\u00E1',
+	    acirc: '\u00E2',
+	    atilde: '\u00E3',
+	    auml: '\u00E4',
+	    aring: '\u00E5',
+	    aelig: '\u00E6',
+	    ccedil: '\u00E7',
+	    egrave: '\u00E8',
+	    eacute: '\u00E9',
+	    ecirc: '\u00EA',
+	    euml: '\u00EB',
+	    igrave: '\u00EC',
+	    iacute: '\u00ED',
+	    icirc: '\u00EE',
+	    iuml: '\u00EF',
+	    eth: '\u00F0',
+	    ntilde: '\u00F1',
+	    ograve: '\u00F2',
+	    oacute: '\u00F3',
+	    ocirc: '\u00F4',
+	    otilde: '\u00F5',
+	    ouml: '\u00F6',
+	    divide: '\u00F7',
+	    oslash: '\u00F8',
+	    ugrave: '\u00F9',
+	    uacute: '\u00FA',
+	    ucirc: '\u00FB',
+	    uuml: '\u00FC',
+	    yacute: '\u00FD',
+	    thorn: '\u00FE',
+	    yuml: '\u00FF',
+	    OElig: '\u0152',
+	    oelig: '\u0153',
+	    Scaron: '\u0160',
+	    scaron: '\u0161',
+	    Yuml: '\u0178',
+	    fnof: '\u0192',
+	    circ: '\u02C6',
+	    tilde: '\u02DC',
+	    Alpha: '\u0391',
+	    Beta: '\u0392',
+	    Gamma: '\u0393',
+	    Delta: '\u0394',
+	    Epsilon: '\u0395',
+	    Zeta: '\u0396',
+	    Eta: '\u0397',
+	    Theta: '\u0398',
+	    Iota: '\u0399',
+	    Kappa: '\u039A',
+	    Lambda: '\u039B',
+	    Mu: '\u039C',
+	    Nu: '\u039D',
+	    Xi: '\u039E',
+	    Omicron: '\u039F',
+	    Pi: '\u03A0',
+	    Rho: '\u03A1',
+	    Sigma: '\u03A3',
+	    Tau: '\u03A4',
+	    Upsilon: '\u03A5',
+	    Phi: '\u03A6',
+	    Chi: '\u03A7',
+	    Psi: '\u03A8',
+	    Omega: '\u03A9',
+	    alpha: '\u03B1',
+	    beta: '\u03B2',
+	    gamma: '\u03B3',
+	    delta: '\u03B4',
+	    epsilon: '\u03B5',
+	    zeta: '\u03B6',
+	    eta: '\u03B7',
+	    theta: '\u03B8',
+	    iota: '\u03B9',
+	    kappa: '\u03BA',
+	    lambda: '\u03BB',
+	    mu: '\u03BC',
+	    nu: '\u03BD',
+	    xi: '\u03BE',
+	    omicron: '\u03BF',
+	    pi: '\u03C0',
+	    rho: '\u03C1',
+	    sigmaf: '\u03C2',
+	    sigma: '\u03C3',
+	    tau: '\u03C4',
+	    upsilon: '\u03C5',
+	    phi: '\u03C6',
+	    chi: '\u03C7',
+	    psi: '\u03C8',
+	    omega: '\u03C9',
+	    thetasym: '\u03D1',
+	    upsih: '\u03D2',
+	    piv: '\u03D6',
+	    ensp: '\u2002',
+	    emsp: '\u2003',
+	    thinsp: '\u2009',
+	    zwnj: '\u200C',
+	    zwj: '\u200D',
+	    lrm: '\u200E',
+	    rlm: '\u200F',
+	    ndash: '\u2013',
+	    mdash: '\u2014',
+	    lsquo: '\u2018',
+	    rsquo: '\u2019',
+	    sbquo: '\u201A',
+	    ldquo: '\u201C',
+	    rdquo: '\u201D',
+	    bdquo: '\u201E',
+	    dagger: '\u2020',
+	    Dagger: '\u2021',
+	    bull: '\u2022',
+	    hellip: '\u2026',
+	    permil: '\u2030',
+	    prime: '\u2032',
+	    Prime: '\u2033',
+	    lsaquo: '\u2039',
+	    rsaquo: '\u203A',
+	    oline: '\u203E',
+	    frasl: '\u2044',
+	    euro: '\u20AC',
+	    image: '\u2111',
+	    weierp: '\u2118',
+	    real: '\u211C',
+	    trade: '\u2122',
+	    alefsym: '\u2135',
+	    larr: '\u2190',
+	    uarr: '\u2191',
+	    rarr: '\u2192',
+	    darr: '\u2193',
+	    harr: '\u2194',
+	    crarr: '\u21B5',
+	    lArr: '\u21D0',
+	    uArr: '\u21D1',
+	    rArr: '\u21D2',
+	    dArr: '\u21D3',
+	    hArr: '\u21D4',
+	    forall: '\u2200',
+	    part: '\u2202',
+	    exist: '\u2203',
+	    empty: '\u2205',
+	    nabla: '\u2207',
+	    isin: '\u2208',
+	    notin: '\u2209',
+	    ni: '\u220B',
+	    prod: '\u220F',
+	    sum: '\u2211',
+	    minus: '\u2212',
+	    lowast: '\u2217',
+	    radic: '\u221A',
+	    prop: '\u221D',
+	    infin: '\u221E',
+	    ang: '\u2220',
+	    and: '\u2227',
+	    or: '\u2228',
+	    cap: '\u2229',
+	    cup: '\u222A',
+	    int: '\u222B',
+	    there4: '\u2234',
+	    sim: '\u223C',
+	    cong: '\u2245',
+	    asymp: '\u2248',
+	    ne: '\u2260',
+	    equiv: '\u2261',
+	    le: '\u2264',
+	    ge: '\u2265',
+	    sub: '\u2282',
+	    sup: '\u2283',
+	    nsub: '\u2284',
+	    sube: '\u2286',
+	    supe: '\u2287',
+	    oplus: '\u2295',
+	    otimes: '\u2297',
+	    perp: '\u22A5',
+	    sdot: '\u22C5',
+	    lceil: '\u2308',
+	    rceil: '\u2309',
+	    lfloor: '\u230A',
+	    rfloor: '\u230B',
+	    loz: '\u25CA',
+	    spades: '\u2660',
+	    clubs: '\u2663',
+	    hearts: '\u2665',
+	    diams: '\u2666',
+	    lang: '\u27E8',
+	    rang: '\u27E9'
+	};
+
+
+/***/ },
+/* 13 */
+/***/ function(module, exports) {
+
+	"use strict";
+	exports.JSXSyntax = {
+	    JSXAttribute: 'JSXAttribute',
+	    JSXClosingElement: 'JSXClosingElement',
+	    JSXElement: 'JSXElement',
+	    JSXEmptyExpression: 'JSXEmptyExpression',
+	    JSXExpressionContainer: 'JSXExpressionContainer',
+	    JSXIdentifier: 'JSXIdentifier',
+	    JSXMemberExpression: 'JSXMemberExpression',
+	    JSXNamespacedName: 'JSXNamespacedName',
+	    JSXOpeningElement: 'JSXOpeningElement',
+	    JSXSpreadAttribute: 'JSXSpreadAttribute',
+	    JSXText: 'JSXText'
+	};
+
+
+/***/ },
+/* 14 */
+/***/ function(module, exports, __webpack_require__) {
+
+	"use strict";
+	var jsx_syntax_1 = __webpack_require__(13);
+	var JSXClosingElement = (function () {
+	    function JSXClosingElement(name) {
+	        this.type = jsx_syntax_1.JSXSyntax.JSXClosingElement;
+	        this.name = name;
+	    }
+	    return JSXClosingElement;
+	}());
+	exports.JSXClosingElement = JSXClosingElement;
+	var JSXElement = (function () {
+	    function JSXElement(openingElement, children, closingElement) {
+	        this.type = jsx_syntax_1.JSXSyntax.JSXElement;
+	        this.openingElement = openingElement;
+	        this.children = children;
+	        this.closingElement = closingElement;
+	    }
+	    return JSXElement;
+	}());
+	exports.JSXElement = JSXElement;
+	var JSXEmptyExpression = (function () {
+	    function JSXEmptyExpression() {
+	        this.type = jsx_syntax_1.JSXSyntax.JSXEmptyExpression;
+	    }
+	    return JSXEmptyExpression;
+	}());
+	exports.JSXEmptyExpression = JSXEmptyExpression;
+	var JSXExpressionContainer = (function () {
+	    function JSXExpressionContainer(expression) {
+	        this.type = jsx_syntax_1.JSXSyntax.JSXExpressionContainer;
+	        this.expression = expression;
+	    }
+	    return JSXExpressionContainer;
+	}());
+	exports.JSXExpressionContainer = JSXExpressionContainer;
+	var JSXIdentifier = (function () {
+	    function JSXIdentifier(name) {
+	        this.type = jsx_syntax_1.JSXSyntax.JSXIdentifier;
+	        this.name = name;
+	    }
+	    return JSXIdentifier;
+	}());
+	exports.JSXIdentifier = JSXIdentifier;
+	var JSXMemberExpression = (function () {
+	    function JSXMemberExpression(object, property) {
+	        this.type = jsx_syntax_1.JSXSyntax.JSXMemberExpression;
+	        this.object = object;
+	        this.property = property;
+	    }
+	    return JSXMemberExpression;
+	}());
+	exports.JSXMemberExpression = JSXMemberExpression;
+	var JSXAttribute = (function () {
+	    function JSXAttribute(name, value) {
+	        this.type = jsx_syntax_1.JSXSyntax.JSXAttribute;
+	        this.name = name;
+	        this.value = value;
+	    }
+	    return JSXAttribute;
+	}());
+	exports.JSXAttribute = JSXAttribute;
+	var JSXNamespacedName = (function () {
+	    function JSXNamespacedName(namespace, name) {
+	        this.type = jsx_syntax_1.JSXSyntax.JSXNamespacedName;
+	        this.namespace = namespace;
+	        this.name = name;
+	    }
+	    return JSXNamespacedName;
+	}());
+	exports.JSXNamespacedName = JSXNamespacedName;
+	var JSXOpeningElement = (function () {
+	    function JSXOpeningElement(name, selfClosing, attributes) {
+	        this.type = jsx_syntax_1.JSXSyntax.JSXOpeningElement;
+	        this.name = name;
+	        this.selfClosing = selfClosing;
+	        this.attributes = attributes;
+	    }
+	    return JSXOpeningElement;
+	}());
+	exports.JSXOpeningElement = JSXOpeningElement;
+	var JSXSpreadAttribute = (function () {
+	    function JSXSpreadAttribute(argument) {
+	        this.type = jsx_syntax_1.JSXSyntax.JSXSpreadAttribute;
+	        this.argument = argument;
+	    }
+	    return JSXSpreadAttribute;
+	}());
+	exports.JSXSpreadAttribute = JSXSpreadAttribute;
+	var JSXText = (function () {
+	    function JSXText(value, raw) {
+	        this.type = jsx_syntax_1.JSXSyntax.JSXText;
+	        this.value = value;
+	        this.raw = raw;
+	    }
+	    return JSXText;
+	}());
+	exports.JSXText = JSXText;
+
+
+/***/ },
+/* 15 */
+/***/ function(module, exports, __webpack_require__) {
+
+	"use strict";
+	var scanner_1 = __webpack_require__(8);
+	var error_handler_1 = __webpack_require__(6);
+	var token_1 = __webpack_require__(7);
+	var Reader = (function () {
+	    function Reader() {
+	        this.values = [];
+	        this.curly = this.paren = -1;
+	    }
+	    ;
+	    // A function following one of those tokens is an expression.
+	    Reader.prototype.beforeFunctionExpression = function (t) {
+	        return ['(', '{', '[', 'in', 'typeof', 'instanceof', 'new',
+	            'return', 'case', 'delete', 'throw', 'void',
+	            // assignment operators
+	            '=', '+=', '-=', '*=', '**=', '/=', '%=', '<<=', '>>=', '>>>=',
+	            '&=', '|=', '^=', ',',
+	            // binary/unary operators
+	            '+', '-', '*', '**', '/', '%', '++', '--', '<<', '>>', '>>>', '&',
+	            '|', '^', '!', '~', '&&', '||', '?', ':', '===', '==', '>=',
+	            '<=', '<', '>', '!=', '!=='].indexOf(t) >= 0;
+	    };
+	    ;
+	    // Determine if forward slash (/) is an operator or part of a regular expression
+	    // https://github.com/mozilla/sweet.js/wiki/design
+	    Reader.prototype.isRegexStart = function () {
+	        var previous = this.values[this.values.length - 1];
+	        var regex = (previous !== null);
+	        switch (previous) {
+	            case 'this':
+	            case ']':
+	                regex = false;
+	                break;
+	            case ')':
+	                var check = this.values[this.paren - 1];
+	                regex = (check === 'if' || check === 'while' || check === 'for' || check === 'with');
+	                break;
+	            case '}':
+	                // Dividing a function by anything makes little sense,
+	                // but we have to check for that.
+	                regex = false;
+	                if (this.values[this.curly - 3] === 'function') {
+	                    // Anonymous function, e.g. function(){} /42
+	                    var check_1 = this.values[this.curly - 4];
+	                    regex = check_1 ? !this.beforeFunctionExpression(check_1) : false;
+	                }
+	                else if (this.values[this.curly - 4] === 'function') {
+	                    // Named function, e.g. function f(){} /42/
+	                    var check_2 = this.values[this.curly - 5];
+	                    regex = check_2 ? !this.beforeFunctionExpression(check_2) : true;
+	                }
+	        }
+	        return regex;
+	    };
+	    ;
+	    Reader.prototype.push = function (token) {
+	        if (token.type === token_1.Token.Punctuator || token.type === token_1.Token.Keyword) {
+	            if (token.value === '{') {
+	                this.curly = this.values.length;
+	            }
+	            else if (token.value === '(') {
+	                this.paren = this.values.length;
+	            }
+	            this.values.push(token.value);
+	        }
+	        else {
+	            this.values.push(null);
+	        }
+	    };
+	    ;
+	    return Reader;
+	}());
+	var Tokenizer = (function () {
+	    function Tokenizer(code, config) {
+	        this.errorHandler = new error_handler_1.ErrorHandler();
+	        this.errorHandler.tolerant = config ? (typeof config.tolerant === 'boolean' && config.tolerant) : false;
+	        this.scanner = new scanner_1.Scanner(code, this.errorHandler);
+	        this.scanner.trackComment = config ? (typeof config.comment === 'boolean' && config.comment) : false;
+	        this.trackRange = config ? (typeof config.range === 'boolean' && config.range) : false;
+	        this.trackLoc = config ? (typeof config.loc === 'boolean' && config.loc) : false;
+	        this.buffer = [];
+	        this.reader = new Reader();
+	    }
+	    ;
+	    Tokenizer.prototype.errors = function () {
+	        return this.errorHandler.errors;
+	    };
+	    ;
+	    Tokenizer.prototype.getNextToken = function () {
+	        if (this.buffer.length === 0) {
+	            var comments = this.scanner.scanComments();
+	            if (this.scanner.trackComment) {
+	                for (var i = 0; i < comments.length; ++i) {
+	                    var e = comments[i];
+	                    var comment = void 0;
+	                    var value = this.scanner.source.slice(e.slice[0], e.slice[1]);
+	                    comment = {
+	                        type: e.multiLine ? 'BlockComment' : 'LineComment',
+	                        value: value
+	                    };
+	                    if (this.trackRange) {
+	                        comment.range = e.range;
+	                    }
+	                    if (this.trackLoc) {
+	                        comment.loc = e.loc;
+	                    }
+	                    this.buffer.push(comment);
+	                }
+	            }
+	            if (!this.scanner.eof()) {
+	                var loc = void 0;
+	                if (this.trackLoc) {
+	                    loc = {
+	                        start: {
+	                            line: this.scanner.lineNumber,
+	                            column: this.scanner.index - this.scanner.lineStart
+	                        },
+	                        end: {}
+	                    };
+	                }
+	                var token = void 0;
+	                if (this.scanner.source[this.scanner.index] === '/') {
+	                    token = this.reader.isRegexStart() ? this.scanner.scanRegExp() : this.scanner.scanPunctuator();
+	                }
+	                else {
+	                    token = this.scanner.lex();
+	                }
+	                this.reader.push(token);
+	                var entry = void 0;
+	                entry = {
+	                    type: token_1.TokenName[token.type],
+	                    value: this.scanner.source.slice(token.start, token.end)
+	                };
+	                if (this.trackRange) {
+	                    entry.range = [token.start, token.end];
+	                }
+	                if (this.trackLoc) {
+	                    loc.end = {
+	                        line: this.scanner.lineNumber,
+	                        column: this.scanner.index - this.scanner.lineStart
+	                    };
+	                    entry.loc = loc;
+	                }
+	                if (token.regex) {
+	                    entry.regex = token.regex;
+	                }
+	                this.buffer.push(entry);
+	            }
+	        }
+	        return this.buffer.shift();
+	    };
+	    ;
+	    return Tokenizer;
+	}());
+	exports.Tokenizer = Tokenizer;
+
+
+/***/ }
+/******/ ])
+});
+;
\ No newline at end of file
diff --git a/testlib/selenium/instrumenter.js b/testlib/selenium/instrumenter.js
new file mode 100644
index 000000000..61c02cf09
--- /dev/null
+++ b/testlib/selenium/instrumenter.js
@@ -0,0 +1,1097 @@
+/*
+ Copyright (c) 2012, Yahoo! Inc.  All rights reserved.
+ Copyrights licensed under the New BSD License. See the accompanying LICENSE file for terms.
+ */
+
+/*global esprima, escodegen, window */
+(function (isNode) {
+    "use strict";
+    var SYNTAX,
+        nodeType,
+        ESP = isNode ? require('esprima') : esprima,
+        ESPGEN = isNode ? require('escodegen') : escodegen,  //TODO - package as dependency
+        crypto = isNode ? require('crypto') : null,
+        LEADER_WRAP = '(function () { ',
+        TRAILER_WRAP = '\n}());',
+        COMMENT_RE = /^\s*istanbul\s+ignore\s+(if|else|next)(?=\W|$)/,
+        astgen,
+        preconditions,
+        cond,
+        isArray = Array.isArray;
+
+    /* istanbul ignore if: untestable */
+    if (!isArray) {
+        isArray = function (thing) { return thing &&  Object.prototype.toString.call(thing) === '[object Array]'; };
+    }
+
+    if (!isNode) {
+        preconditions = {
+            'Could not find esprima': ESP,
+            'Could not find escodegen': ESPGEN,
+            'JSON object not in scope': JSON,
+            'Array does not implement push': [].push,
+            'Array does not implement unshift': [].unshift
+        };
+        /* istanbul ignore next: untestable */
+        for (cond in preconditions) {
+            if (preconditions.hasOwnProperty(cond)) {
+                if (!preconditions[cond]) { throw new Error(cond); }
+            }
+        }
+    }
+
+    function generateTrackerVar(filename, omitSuffix) {
+        var hash, suffix;
+        if (crypto !== null) {
+            hash = crypto.createHash('md5');
+            hash.update(filename);
+            suffix = hash.digest('base64');
+            //trim trailing equal signs, turn identifier unsafe chars to safe ones + => _ and / => $
+            suffix = suffix.replace(new RegExp('=', 'g'), '')
+                .replace(new RegExp('\\+', 'g'), '_')
+                .replace(new RegExp('/', 'g'), '$');
+        } else {
+            window.__cov_seq = window.__cov_seq || 0;
+            window.__cov_seq += 1;
+            suffix = window.__cov_seq;
+        }
+        return '__cov_' + (omitSuffix ? '' : suffix);
+    }
+
+    function pushAll(ary, thing) {
+        if (!isArray(thing)) {
+            thing = [ thing ];
+        }
+        Array.prototype.push.apply(ary, thing);
+    }
+
+    SYNTAX = {
+        // keep in sync with estraverse's VisitorKeys
+        AssignmentExpression: ['left', 'right'],
+        AssignmentPattern: ['left', 'right'],
+        ArrayExpression: ['elements'],
+        ArrayPattern: ['elements'],
+        ArrowFunctionExpression: ['params', 'body'],
+        AwaitExpression: ['argument'], // CAUTION: It's deferred to ES7.
+        BlockStatement: ['body'],
+        BinaryExpression: ['left', 'right'],
+        BreakStatement: ['label'],
+        CallExpression: ['callee', 'arguments'],
+        CatchClause: ['param', 'body'],
+        ClassBody: ['body'],
+        ClassDeclaration: ['id', 'superClass', 'body'],
+        ClassExpression: ['id', 'superClass', 'body'],
+        ComprehensionBlock: ['left', 'right'],  // CAUTION: It's deferred to ES7.
+        ComprehensionExpression: ['blocks', 'filter', 'body'],  // CAUTION: It's deferred to ES7.
+        ConditionalExpression: ['test', 'consequent', 'alternate'],
+        ContinueStatement: ['label'],
+        DebuggerStatement: [],
+        DirectiveStatement: [],
+        DoWhileStatement: ['body', 'test'],
+        EmptyStatement: [],
+        ExportAllDeclaration: ['source'],
+        ExportDefaultDeclaration: ['declaration'],
+        ExportNamedDeclaration: ['declaration', 'specifiers', 'source'],
+        ExportSpecifier: ['exported', 'local'],
+        ExpressionStatement: ['expression'],
+        ForStatement: ['init', 'test', 'update', 'body'],
+        ForInStatement: ['left', 'right', 'body'],
+        ForOfStatement: ['left', 'right', 'body'],
+        FunctionDeclaration: ['id', 'params', 'body'],
+        FunctionExpression: ['id', 'params', 'body'],
+        GeneratorExpression: ['blocks', 'filter', 'body'],  // CAUTION: It's deferred to ES7.
+        Identifier: [],
+        IfStatement: ['test', 'consequent', 'alternate'],
+        ImportDeclaration: ['specifiers', 'source'],
+        ImportDefaultSpecifier: ['local'],
+        ImportNamespaceSpecifier: ['local'],
+        ImportSpecifier: ['imported', 'local'],
+        Literal: [],
+        LabeledStatement: ['label', 'body'],
+        LogicalExpression: ['left', 'right'],
+        MetaProperty: ['meta', 'property'],
+        MemberExpression: ['object', 'property'],
+        MethodDefinition: ['key', 'value'],
+        ModuleSpecifier: [],
+        NewExpression: ['callee', 'arguments'],
+        ObjectExpression: ['properties'],
+        ObjectPattern: ['properties'],
+        Program: ['body'],
+        Property: ['key', 'value'],
+        RestElement: [ 'argument' ],
+        ReturnStatement: ['argument'],
+        SequenceExpression: ['expressions'],
+        SpreadElement: ['argument'],
+        Super: [],
+        SwitchStatement: ['discriminant', 'cases'],
+        SwitchCase: ['test', 'consequent'],
+        TaggedTemplateExpression: ['tag', 'quasi'],
+        TemplateElement: [],
+        TemplateLiteral: ['quasis', 'expressions'],
+        ThisExpression: [],
+        ThrowStatement: ['argument'],
+        TryStatement: ['block', 'handler', 'finalizer'],
+        UnaryExpression: ['argument'],
+        UpdateExpression: ['argument'],
+        VariableDeclaration: ['declarations'],
+        VariableDeclarator: ['id', 'init'],
+        WhileStatement: ['test', 'body'],
+        WithStatement: ['object', 'body'],
+        YieldExpression: ['argument']
+    };
+
+    for (nodeType in SYNTAX) {
+        /* istanbul ignore else: has own property */
+        if (SYNTAX.hasOwnProperty(nodeType)) {
+            SYNTAX[nodeType] = { name: nodeType, children: SYNTAX[nodeType] };
+        }
+    }
+
+    astgen = {
+        variable: function (name) { return { type: SYNTAX.Identifier.name, name: name }; },
+        stringLiteral: function (str) { return { type: SYNTAX.Literal.name, value: String(str) }; },
+        numericLiteral: function (num) { return { type: SYNTAX.Literal.name, value: Number(num) }; },
+        statement: function (contents) { return { type: SYNTAX.ExpressionStatement.name, expression: contents }; },
+        dot: function (obj, field) { return { type: SYNTAX.MemberExpression.name, computed: false, object: obj, property: field }; },
+        subscript: function (obj, sub) { return { type: SYNTAX.MemberExpression.name, computed: true, object: obj, property: sub }; },
+        postIncrement: function (obj) { return { type: SYNTAX.UpdateExpression.name, operator: '++', prefix: false, argument: obj }; },
+        sequence: function (one, two) { return { type: SYNTAX.SequenceExpression.name, expressions: [one, two] }; },
+        returnStatement: function (expr) { return { type: SYNTAX.ReturnStatement.name, argument: expr }; }
+    };
+
+    function Walker(walkMap, preprocessor, scope, debug) {
+        this.walkMap = walkMap;
+        this.preprocessor = preprocessor;
+        this.scope = scope;
+        this.debug = debug;
+        if (this.debug) {
+            this.level = 0;
+            this.seq = true;
+        }
+    }
+
+    function defaultWalker(node, walker) {
+
+        var type = node.type,
+            preprocessor,
+            postprocessor,
+            children = SYNTAX[type],
+            // don't run generated nodes thru custom walks otherwise we will attempt to instrument the instrumentation code :)
+            applyCustomWalker = !!node.loc || node.type === SYNTAX.Program.name,
+            walkerFn = applyCustomWalker ? walker.walkMap[type] : null,
+            i,
+            j,
+            walkFnIndex,
+            childType,
+            childNode,
+            ret,
+            childArray,
+            childElement,
+            pathElement,
+            assignNode,
+            isLast;
+
+        if (!SYNTAX[type]) {
+            console.error(node);
+            console.error('Unsupported node type:' + type);
+            return;
+        }
+        children = SYNTAX[type].children;
+        /* istanbul ignore if: guard */
+        if (node.walking) { throw new Error('Infinite regress: Custom walkers may NOT call walker.apply(node)'); }
+        node.walking = true;
+
+        ret = walker.apply(node, walker.preprocessor);
+
+        preprocessor = ret.preprocessor;
+        if (preprocessor) {
+            delete ret.preprocessor;
+            ret = walker.apply(node, preprocessor);
+        }
+
+        if (isArray(walkerFn)) {
+            for (walkFnIndex = 0; walkFnIndex < walkerFn.length; walkFnIndex += 1) {
+                isLast = walkFnIndex === walkerFn.length - 1;
+                ret = walker.apply(ret, walkerFn[walkFnIndex]);
+                /*istanbul ignore next: paranoid check */
+                if (ret.type !== type && !isLast) {
+                    throw new Error('Only the last walker is allowed to change the node type: [type was: ' + type + ' ]');
+                }
+            }
+        } else {
+            if (walkerFn) {
+                ret = walker.apply(node, walkerFn);
+            }
+        }
+
+        if (node.skipSelf) {
+            return;
+        }
+
+        for (i = 0; i < children.length; i += 1) {
+            childType = children[i];
+            childNode = node[childType];
+            if (childNode && !childNode.skipWalk) {
+                pathElement = { node: node, property: childType };
+                if (isArray(childNode)) {
+                    childArray = [];
+                    for (j = 0; j < childNode.length; j += 1) {
+                        childElement = childNode[j];
+                        pathElement.index = j;
+                        if (childElement) {
+                          assignNode = walker.apply(childElement, null, pathElement);
+                          if (isArray(assignNode.prepend)) {
+                              pushAll(childArray, assignNode.prepend);
+                              delete assignNode.prepend;
+                          }
+                        } else {
+                            assignNode = undefined;
+                        }
+                        pushAll(childArray, assignNode);
+                    }
+                    node[childType] = childArray;
+                } else {
+                    assignNode = walker.apply(childNode, null, pathElement);
+                    /*istanbul ignore if: paranoid check */
+                    if (isArray(assignNode.prepend)) {
+                        throw new Error('Internal error: attempt to prepend statements in disallowed (non-array) context');
+                        /* if this should be allowed, this is how to solve it
+                        tmpNode = { type: 'BlockStatement', body: [] };
+                        pushAll(tmpNode.body, assignNode.prepend);
+                        pushAll(tmpNode.body, assignNode);
+                        node[childType] = tmpNode;
+                        delete assignNode.prepend;
+                        */
+                    } else {
+                        node[childType] = assignNode;
+                    }
+                }
+            }
+        }
+
+        postprocessor = ret.postprocessor;
+        if (postprocessor) {
+            delete ret.postprocessor;
+            ret = walker.apply(ret, postprocessor);
+        }
+
+        delete node.walking;
+
+        return ret;
+    }
+
+    Walker.prototype = {
+        startWalk: function (node) {
+            this.path = [];
+            this.apply(node);
+        },
+
+        apply: function (node, walkFn, pathElement) {
+            var ret, i, seq, prefix;
+
+            walkFn = walkFn || defaultWalker;
+            if (this.debug) {
+                this.seq += 1;
+                this.level += 1;
+                seq = this.seq;
+                prefix = '';
+                for (i = 0; i < this.level; i += 1) { prefix += '    '; }
+                console.log(prefix + 'Enter (' + seq + '):' + node.type);
+            }
+            if (pathElement) { this.path.push(pathElement); }
+            ret = walkFn.call(this.scope, node, this);
+            if (pathElement) { this.path.pop(); }
+            if (this.debug) {
+                this.level -= 1;
+                console.log(prefix + 'Return (' + seq + '):' + node.type);
+            }
+            return ret || node;
+        },
+
+        startLineForNode: function (node) {
+            return node && node.loc && node.loc.start ? node.loc.start.line : /* istanbul ignore next: guard */ null;
+        },
+
+        ancestor: function (n) {
+            return this.path.length > n - 1 ? this.path[this.path.length - n] : /* istanbul ignore next: guard */ null;
+        },
+
+        parent: function () {
+            return this.ancestor(1);
+        },
+
+        isLabeled: function () {
+            var el = this.parent();
+            return el && el.node.type === SYNTAX.LabeledStatement.name;
+        }
+    };
+
+    /**
+     * mechanism to instrument code for coverage. It uses the `esprima` and
+     * `escodegen` libraries for JS parsing and code generation respectively.
+     *
+     * Works on `node` as well as the browser.
+     *
+     * Usage on nodejs
+     * ---------------
+     *
+     *      var instrumenter = new require('istanbul').Instrumenter(),
+     *          changed = instrumenter.instrumentSync('function meaningOfLife() { return 42; }', 'filename.js');
+     *
+     * Usage in a browser
+     * ------------------
+     *
+     * Load `esprima.js`, `escodegen.js` and `instrumenter.js` (this file) using `script` tags or other means.
+     *
+     * Create an instrumenter object as:
+     *
+     *      var instrumenter = new Instrumenter(),
+     *          changed = instrumenter.instrumentSync('function meaningOfLife() { return 42; }', 'filename.js');
+     *
+     * Aside from demonstration purposes, it is unclear why you would want to instrument code in a browser.
+     *
+     * @class Instrumenter
+     * @constructor
+     * @param {Object} options Optional. Configuration options.
+     * @param {String} [options.coverageVariable] the global variable name to use for
+     *      tracking coverage. Defaults to `__coverage__`
+     * @param {Boolean} [options.embedSource] whether to embed the source code of every
+     *      file as an array in the file coverage object for that file. Defaults to `false`
+     * @param {Boolean} [options.preserveComments] whether comments should be preserved in the output. Defaults to `false`
+     * @param {Boolean} [options.noCompact] emit readable code when set. Defaults to `false`
+     * @param {Boolean} [options.esModules] whether the code to instrument contains uses es
+     *      imports or exports.
+     * @param {Boolean} [options.noAutoWrap] do not automatically wrap the source in
+     *      an anonymous function before covering it. By default, code is wrapped in
+     *      an anonymous function before it is parsed. This is done because
+     *      some nodejs libraries have `return` statements outside of
+     *      a function which is technically invalid Javascript and causes the parser to fail.
+     *      This construct, however, works correctly in node since module loading
+     *      is done in the context of an anonymous function.
+     *
+     * Note that the semantics of the code *returned* by the instrumenter does not change in any way.
+     * The function wrapper is "unwrapped" before the instrumented code is generated.
+     * @param {Object} [options.codeGenerationOptions] an object that is directly passed to the `escodegen`
+     *      library as configuration for code generation. The `noCompact` setting is not honored when this
+     *      option is specified
+     * @param {Boolean} [options.debug] assist in debugging. Currently, the only effect of
+     *      setting this option is a pretty-print of the coverage variable. Defaults to `false`
+     * @param {Boolean} [options.walkDebug] assist in debugging of the AST walker used by this class.
+     *
+     */
+    function Instrumenter(options) {
+        this.opts = options || {
+            debug: false,
+            walkDebug: false,
+            coverageVariable: '__coverage__',
+            codeGenerationOptions: undefined,
+            noAutoWrap: false,
+            noCompact: false,
+            embedSource: false,
+            preserveComments: false,
+            esModules: false
+        };
+
+        if (this.opts.esModules && !this.opts.noAutoWrap) {
+            this.opts.noAutoWrap = true;
+            if (this.opts.debug) {
+                console.log('Setting noAutoWrap to true as required by esModules');
+            }
+        }
+
+        this.walker = new Walker({
+            ArrowFunctionExpression: [ this.arrowBlockConverter ],
+            ExpressionStatement: this.coverStatement,
+            ExportNamedDeclaration: this.coverExport,
+            BreakStatement: this.coverStatement,
+            ContinueStatement: this.coverStatement,
+            DebuggerStatement: this.coverStatement,
+            ReturnStatement: this.coverStatement,
+            ThrowStatement: this.coverStatement,
+            TryStatement: [ this.paranoidHandlerCheck, this.coverStatement],
+            VariableDeclaration: this.coverStatement,
+            IfStatement: [ this.ifBlockConverter, this.coverStatement, this.ifBranchInjector ],
+            ForStatement: [ this.skipInit, this.loopBlockConverter, this.coverStatement ],
+            ForInStatement: [ this.skipLeft, this.loopBlockConverter, this.coverStatement ],
+            ForOfStatement: [ this.skipLeft, this.loopBlockConverter, this.coverStatement ],
+            WhileStatement: [ this.loopBlockConverter, this.coverStatement ],
+            DoWhileStatement: [ this.loopBlockConverter, this.coverStatement ],
+            SwitchStatement: [ this.coverStatement, this.switchBranchInjector ],
+            SwitchCase: [ this.switchCaseInjector ],
+            WithStatement: [ this.withBlockConverter, this.coverStatement ],
+            FunctionDeclaration: [ this.coverFunction, this.coverStatement ],
+            FunctionExpression: this.coverFunction,
+            LabeledStatement: this.coverStatement,
+            ConditionalExpression: this.conditionalBranchInjector,
+            LogicalExpression: this.logicalExpressionBranchInjector,
+            ObjectExpression: this.maybeAddType,
+            MetaProperty: this.coverMetaProperty,
+        }, this.extractCurrentHint, this, this.opts.walkDebug);
+
+        //unit testing purposes only
+        if (this.opts.backdoor && this.opts.backdoor.omitTrackerSuffix) {
+            this.omitTrackerSuffix = true;
+        }
+    }
+
+    Instrumenter.prototype = {
+        /**
+         * synchronous instrumentation method. Throws when illegal code is passed to it
+         * @method instrumentSync
+         * @param {String} code the code to be instrumented as a String
+         * @param {String} filename Optional. The name of the file from which
+         *  the code was read. A temporary filename is generated when not specified.
+         *  Not specifying a filename is only useful for unit tests and demonstrations
+         *  of this library.
+         */
+        instrumentSync: function (code, filename) {
+            var program;
+
+            //protect from users accidentally passing in a Buffer object instead
+            if (typeof code !== 'string') { throw new Error('Code must be string'); }
+            if (code.charAt(0) === '#') { //shebang, 'comment' it out, won't affect syntax tree locations for things we care about
+                code = '//' + code;
+            }
+            if (!this.opts.noAutoWrap) {
+                code = LEADER_WRAP + code + TRAILER_WRAP;
+            }
+            try {
+                program = ESP.parse(code, {
+                    loc: true,
+                    range: true,
+                    tokens: this.opts.preserveComments,
+                    comment: true,
+                    sourceType: this.opts.esModules ? 'module' : 'script'
+                });
+            } catch (e) {
+                console.log('Failed to parse file: ' + filename);
+                throw e;
+            }
+            if (this.opts.preserveComments) {
+                program = ESPGEN.attachComments(program, program.comments, program.tokens);
+            }
+            if (!this.opts.noAutoWrap) {
+                program = {
+                    type: SYNTAX.Program.name,
+                    body: program.body[0].expression.callee.body.body,
+                    comments: program.comments
+                };
+            }
+            return this.instrumentASTSync(program, filename, code);
+        },
+        filterHints: function (comments) {
+            var ret = [],
+                i,
+                comment,
+                groups;
+            if (!(comments && isArray(comments))) {
+                return ret;
+            }
+            for (i = 0; i < comments.length; i += 1) {
+                comment = comments[i];
+                /* istanbul ignore else: paranoid check */
+                if (comment && comment.value && comment.range && isArray(comment.range)) {
+                    groups = String(comment.value).match(COMMENT_RE);
+                    if (groups) {
+                        ret.push({ type: groups[1], start: comment.range[0], end: comment.range[1] });
+                    }
+                }
+            }
+            return ret;
+        },
+        extractCurrentHint: function (node) {
+            if (!node.range) { return; }
+            var i = this.currentState.lastHintPosition + 1,
+                hints = this.currentState.hints,
+                nodeStart = node.range[0],
+                hint;
+            this.currentState.currentHint = null;
+            while (i < hints.length) {
+                hint = hints[i];
+                if (hint.end < nodeStart) {
+                    this.currentState.currentHint = hint;
+                    this.currentState.lastHintPosition = i;
+                    i += 1;
+                } else {
+                    break;
+                }
+            }
+        },
+        /**
+         * synchronous instrumentation method that instruments an AST instead.
+         * @method instrumentASTSync
+         * @param {String} program the AST to be instrumented
+         * @param {String} filename Optional. The name of the file from which
+         *  the code was read. A temporary filename is generated when not specified.
+         *  Not specifying a filename is only useful for unit tests and demonstrations
+         *  of this library.
+         *  @param {String} originalCode the original code corresponding to the AST,
+         *  used for embedding the source into the coverage object
+         */
+        instrumentASTSync: function (program, filename, originalCode) {
+            var usingStrict = false,
+                codegenOptions,
+                generated,
+                preamble,
+                lineCount,
+                i;
+            filename = filename || String(new Date().getTime()) + '.js';
+            this.sourceMap = null;
+            this.coverState = {
+                path: filename,
+                s: {},
+                b: {},
+                f: {},
+                fnMap: {},
+                statementMap: {},
+                branchMap: {}
+            };
+            this.currentState = {
+                trackerVar: generateTrackerVar(filename, this.omitTrackerSuffix),
+                func: 0,
+                branch: 0,
+                variable: 0,
+                statement: 0,
+                hints: this.filterHints(program.comments),
+                currentHint: null,
+                lastHintPosition: -1,
+                ignoring: 0
+            };
+            if (program.body && program.body.length > 0 && this.isUseStrictExpression(program.body[0])) {
+                //nuke it
+                program.body.shift();
+                //and add it back at code generation time
+                usingStrict = true;
+            }
+            this.walker.startWalk(program);
+            codegenOptions = this.opts.codeGenerationOptions || { format: { compact: !this.opts.noCompact }};
+            codegenOptions.comment = this.opts.preserveComments;
+            //console.log(JSON.stringify(program, undefined, 2));
+
+            generated = ESPGEN.generate(program, codegenOptions);
+            preamble = this.getPreamble(originalCode || '', usingStrict);
+
+            if (generated.map && generated.code) {
+                lineCount = preamble.split(/\r\n|\r|\n/).length;
+                // offset all the generated line numbers by the number of lines in the preamble
+                for (i = 0; i < generated.map._mappings._array.length; i += 1) {
+                    generated.map._mappings._array[i].generatedLine += lineCount;
+                }
+                this.sourceMap = generated.map;
+                generated = generated.code;
+            }
+
+            return preamble + '\n' + generated + '\n';
+        },
+        /**
+         * Callback based instrumentation. Note that this still executes synchronously in the same process tick
+         * and calls back immediately. It only provides the options for callback style error handling as
+         * opposed to a `try-catch` style and nothing more. Implemented as a wrapper over `instrumentSync`
+         *
+         * @method instrument
+         * @param {String} code the code to be instrumented as a String
+         * @param {String} filename Optional. The name of the file from which
+         *  the code was read. A temporary filename is generated when not specified.
+         *  Not specifying a filename is only useful for unit tests and demonstrations
+         *  of this library.
+         * @param {Function(err, instrumentedCode)} callback - the callback function
+         */
+        instrument: function (code, filename, callback) {
+
+            if (!callback && typeof filename === 'function') {
+                callback = filename;
+                filename = null;
+            }
+            try {
+                callback(null, this.instrumentSync(code, filename));
+            } catch (ex) {
+                callback(ex);
+            }
+        },
+        /**
+         * returns the file coverage object for the code that was instrumented
+         * just before calling this method. Note that this represents a
+         * "zero-coverage" object which is not even representative of the code
+         * being loaded in node or a browser (which would increase the statement
+         * counts for mainline code).
+         * @method lastFileCoverage
+         * @return {Object} a "zero-coverage" file coverage object for the code last instrumented
+         * by this instrumenter
+         */
+        lastFileCoverage: function () {
+            return this.coverState;
+        },
+        /**
+         * returns the source map object for the code that was instrumented
+         * just before calling this method.
+         * @method lastSourceMap
+         * @return {Object} a source map object for the code last instrumented
+         * by this instrumenter
+         */
+        lastSourceMap: function () {
+            return this.sourceMap;
+        },
+        fixColumnPositions: function (coverState) {
+            var offset = LEADER_WRAP.length,
+                fixer = function (loc) {
+                    if (loc.start.line === 1) {
+                        loc.start.column -= offset;
+                    }
+                    if (loc.end.line === 1) {
+                        loc.end.column -= offset;
+                    }
+                },
+                k,
+                obj,
+                i,
+                locations;
+
+            obj = coverState.statementMap;
+            for (k in obj) {
+                /* istanbul ignore else: has own property */
+                if (obj.hasOwnProperty(k)) { fixer(obj[k]); }
+            }
+            obj = coverState.fnMap;
+            for (k in obj) {
+                /* istanbul ignore else: has own property */
+                if (obj.hasOwnProperty(k)) { fixer(obj[k].loc); }
+            }
+            obj = coverState.branchMap;
+            for (k in obj) {
+                /* istanbul ignore else: has own property */
+                if (obj.hasOwnProperty(k)) {
+                    locations = obj[k].locations;
+                    for (i = 0; i < locations.length; i += 1) {
+                        fixer(locations[i]);
+                    }
+                }
+            }
+        },
+
+        getPreamble: function (sourceCode, emitUseStrict) {
+            var varName = this.opts.coverageVariable || '__coverage__',
+                file = this.coverState.path.replace(/\\/g, '\\\\'),
+                tracker = this.currentState.trackerVar,
+                coverState,
+                strictLine = emitUseStrict ? '"use strict";' : '',
+                // return replacements using the function to ensure that the replacement is
+                // treated like a dumb string and not as a string with RE replacement patterns
+                replacer = function (s) {
+                    return function () { return s; };
+                },
+                code;
+            if (!this.opts.noAutoWrap) {
+                this.fixColumnPositions(this.coverState);
+            }
+            if (this.opts.embedSource) {
+                this.coverState.code = sourceCode.split(/(?:\r?\n)|\r/);
+            }
+            coverState = this.opts.debug ? JSON.stringify(this.coverState, undefined, 4) : JSON.stringify(this.coverState);
+            code = [
+                "%STRICT%",
+                "var %VAR% = (Function('return this'))();",
+                "if (!%VAR%.%GLOBAL%) { %VAR%.%GLOBAL% = {}; }",
+                "%VAR% = %VAR%.%GLOBAL%;",
+                "if (!(%VAR%['%FILE%'])) {",
+                "   %VAR%['%FILE%'] = %OBJECT%;",
+                "}",
+                "%VAR% = %VAR%['%FILE%'];"
+            ].join("\n")
+                .replace(/%STRICT%/g, replacer(strictLine))
+                .replace(/%VAR%/g, replacer(tracker))
+                .replace(/%GLOBAL%/g, replacer(varName))
+                .replace(/%FILE%/g, replacer(file))
+                .replace(/%OBJECT%/g, replacer(coverState));
+            return code;
+        },
+
+        startIgnore: function () {
+            this.currentState.ignoring += 1;
+        },
+
+        endIgnore: function () {
+            this.currentState.ignoring -= 1;
+        },
+
+        convertToBlock: function (node) {
+            if (!node) {
+                return { type: 'BlockStatement', body: [] };
+            } else if (node.type === 'BlockStatement') {
+                return node;
+            } else {
+                return { type: 'BlockStatement', body: [ node ] };
+            }
+        },
+
+        arrowBlockConverter: function (node) {
+            var retStatement;
+            if (node.expression) { // turn expression nodes into a block with a return statement
+                retStatement = astgen.returnStatement(node.body);
+                // ensure the generated return statement is covered
+                retStatement.loc = node.body.loc;
+                node.body = this.convertToBlock(retStatement);
+                node.expression = false;
+            }
+        },
+
+        paranoidHandlerCheck: function (node) {
+            // if someone is using an older esprima on the browser
+            // convert handlers array to single handler attribute
+            // containing its first element
+            /* istanbul ignore next */
+            if (!node.handler && node.handlers) {
+                node.handler = node.handlers[0];
+            }
+        },
+
+        ifBlockConverter: function (node) {
+            node.consequent = this.convertToBlock(node.consequent);
+            node.alternate = this.convertToBlock(node.alternate);
+        },
+
+        loopBlockConverter: function (node) {
+            node.body = this.convertToBlock(node.body);
+        },
+
+        withBlockConverter: function (node) {
+            node.body = this.convertToBlock(node.body);
+        },
+
+        statementName: function (location, initValue) {
+            var sName,
+                ignoring = !!this.currentState.ignoring;
+
+            location.skip = ignoring || undefined;
+            initValue = initValue || 0;
+            this.currentState.statement += 1;
+            sName = this.currentState.statement;
+            this.coverState.statementMap[sName] = location;
+            this.coverState.s[sName] = initValue;
+            return sName;
+        },
+
+        skipInit: function (node /*, walker */) {
+            if (node.init) {
+                node.init.skipWalk = true;
+            }
+        },
+
+        skipLeft: function (node /*, walker */) {
+            node.left.skipWalk = true;
+        },
+
+        isUseStrictExpression: function (node) {
+            return node && node.type === SYNTAX.ExpressionStatement.name &&
+                node.expression  && node.expression.type === SYNTAX.Literal.name &&
+                node.expression.value === 'use strict';
+        },
+
+        maybeSkipNode: function (node, type) {
+            var alreadyIgnoring = !!this.currentState.ignoring,
+                hint = this.currentState.currentHint,
+                ignoreThis = !alreadyIgnoring && hint && hint.type === type;
+
+            if (ignoreThis) {
+                this.startIgnore();
+                node.postprocessor = this.endIgnore;
+                return true;
+            }
+            return false;
+        },
+
+        coverMetaProperty: function(node /* , walker */) {
+           node.skipSelf = true;
+        },
+
+        coverStatement: function (node, walker) {
+            var sName,
+                incrStatementCount,
+                parent,
+                grandParent;
+
+            this.maybeSkipNode(node, 'next');
+
+            if (this.isUseStrictExpression(node)) {
+                grandParent = walker.ancestor(2);
+                /* istanbul ignore else: difficult to test */
+                if (grandParent) {
+                    if ((grandParent.node.type === SYNTAX.FunctionExpression.name ||
+                        grandParent.node.type === SYNTAX.FunctionDeclaration.name)  &&
+                        walker.parent().node.body[0] === node) {
+                        return;
+                    }
+                }
+            }
+
+            if (node.type === SYNTAX.FunctionDeclaration.name) {
+                // Called for the side-effect of setting the function's statement count to 1.
+                this.statementName(node.loc, 1);
+            } else {
+                // We let `coverExport` handle ExportNamedDeclarations.
+                parent = walker.parent();
+                if (parent && parent.node.type === SYNTAX.ExportNamedDeclaration.name) {
+                    return;
+                }
+
+                sName = this.statementName(node.loc);
+
+                incrStatementCount = astgen.statement(
+                    astgen.postIncrement(
+                        astgen.subscript(
+                            astgen.dot(astgen.variable(this.currentState.trackerVar), astgen.variable('s')),
+                            astgen.stringLiteral(sName)
+                        )
+                    )
+                );
+
+                this.splice(incrStatementCount, node, walker);
+            }
+        },
+
+        coverExport: function (node, walker) {
+            var sName, incrStatementCount;
+
+            if ( !node.declaration || !node.declaration.declarations ) { return; }
+
+            this.maybeSkipNode(node, 'next');
+
+            sName = this.statementName(node.declaration.loc);
+            incrStatementCount = astgen.statement(
+                astgen.postIncrement(
+                    astgen.subscript(
+                        astgen.dot(astgen.variable(this.currentState.trackerVar), astgen.variable('s')),
+                        astgen.stringLiteral(sName)
+                    )
+                )
+            );
+
+            this.splice(incrStatementCount, node, walker);
+        },
+
+        splice: function (statements, node, walker) {
+            var targetNode = walker.isLabeled() ? walker.parent().node : node;
+            targetNode.prepend = targetNode.prepend || [];
+            pushAll(targetNode.prepend, statements);
+        },
+
+        functionName: function (node, line, location) {
+            this.currentState.func += 1;
+            var id = this.currentState.func,
+                ignoring = !!this.currentState.ignoring,
+                name = node.id ? node.id.name : '(anonymous_' + id + ')',
+                clone = function (attr) {
+                    var obj = location[attr] || /* istanbul ignore next */ {};
+                    return { line: obj.line, column: obj.column };
+                };
+            this.coverState.fnMap[id] = {
+                name: name, line: line,
+                loc: {
+                    start: clone('start'),
+                    end: clone('end')
+                },
+                skip: ignoring || undefined
+            };
+            this.coverState.f[id] = 0;
+            return id;
+        },
+
+        coverFunction: function (node, walker) {
+            var id,
+                body = node.body,
+                blockBody = body.body,
+                popped;
+
+            this.maybeSkipNode(node, 'next');
+
+            id = this.functionName(node, walker.startLineForNode(node), {
+                start: node.loc.start,
+                end: { line: node.body.loc.start.line, column: node.body.loc.start.column }
+            });
+
+            if (blockBody.length > 0 && this.isUseStrictExpression(blockBody[0])) {
+                popped = blockBody.shift();
+            }
+            blockBody.unshift(
+                astgen.statement(
+                    astgen.postIncrement(
+                        astgen.subscript(
+                            astgen.dot(astgen.variable(this.currentState.trackerVar), astgen.variable('f')),
+                            astgen.stringLiteral(id)
+                        )
+                    )
+                )
+            );
+            if (popped) {
+                blockBody.unshift(popped);
+            }
+        },
+
+        branchName: function (type, startLine, pathLocations) {
+            var bName,
+                paths = [],
+                locations = [],
+                i,
+                ignoring = !!this.currentState.ignoring;
+            this.currentState.branch += 1;
+            bName = this.currentState.branch;
+            for (i = 0; i < pathLocations.length; i += 1) {
+                pathLocations[i].skip = pathLocations[i].skip || ignoring || undefined;
+                locations.push(pathLocations[i]);
+                paths.push(0);
+            }
+            this.coverState.b[bName] = paths;
+            this.coverState.branchMap[bName] = { line: startLine, type: type, locations: locations };
+            return bName;
+        },
+
+        branchIncrementExprAst: function (varName, branchIndex, down) {
+            var ret = astgen.postIncrement(
+                astgen.subscript(
+                    astgen.subscript(
+                        astgen.dot(astgen.variable(this.currentState.trackerVar), astgen.variable('b')),
+                        astgen.stringLiteral(varName)
+                    ),
+                    astgen.numericLiteral(branchIndex)
+                ),
+                down
+            );
+            return ret;
+        },
+
+        locationsForNodes: function (nodes) {
+            var ret = [],
+                i;
+            for (i = 0; i < nodes.length; i += 1) {
+                ret.push(nodes[i].loc);
+            }
+            return ret;
+        },
+
+        ifBranchInjector: function (node, walker) {
+            var alreadyIgnoring = !!this.currentState.ignoring,
+                hint = this.currentState.currentHint,
+                ignoreThen = !alreadyIgnoring && hint && hint.type === 'if',
+                ignoreElse = !alreadyIgnoring && hint && hint.type === 'else',
+                line = node.loc.start.line,
+                col = node.loc.start.column,
+                makeLoc = function () { return  { line: line, column: col }; },
+                bName = this.branchName('if', walker.startLineForNode(node), [
+                    { start: makeLoc(), end: makeLoc(), skip: ignoreThen || undefined },
+                    { start: makeLoc(), end: makeLoc(), skip: ignoreElse || undefined }
+                ]),
+                thenBody = node.consequent.body,
+                elseBody = node.alternate.body,
+                child;
+            thenBody.unshift(astgen.statement(this.branchIncrementExprAst(bName, 0)));
+            elseBody.unshift(astgen.statement(this.branchIncrementExprAst(bName, 1)));
+            if (ignoreThen) { child = node.consequent; child.preprocessor = this.startIgnore; child.postprocessor = this.endIgnore; }
+            if (ignoreElse) { child = node.alternate; child.preprocessor = this.startIgnore; child.postprocessor = this.endIgnore; }
+        },
+
+        branchLocationFor: function (name, index) {
+            return this.coverState.branchMap[name].locations[index];
+        },
+
+        switchBranchInjector: function (node, walker) {
+            var cases = node.cases,
+                bName,
+                i;
+
+            if (!(cases && cases.length > 0)) {
+                return;
+            }
+            bName = this.branchName('switch', walker.startLineForNode(node), this.locationsForNodes(cases));
+            for (i = 0; i < cases.length; i += 1) {
+                cases[i].branchLocation = this.branchLocationFor(bName, i);
+                cases[i].consequent.unshift(astgen.statement(this.branchIncrementExprAst(bName, i)));
+            }
+        },
+
+        switchCaseInjector: function (node) {
+            var location = node.branchLocation;
+            delete node.branchLocation;
+            if (this.maybeSkipNode(node, 'next')) {
+                location.skip = true;
+            }
+        },
+
+        conditionalBranchInjector: function (node, walker) {
+            var bName = this.branchName('cond-expr', walker.startLineForNode(node), this.locationsForNodes([ node.consequent, node.alternate ])),
+                ast1 = this.branchIncrementExprAst(bName, 0),
+                ast2 = this.branchIncrementExprAst(bName, 1);
+
+            node.consequent.preprocessor = this.maybeAddSkip(this.branchLocationFor(bName, 0));
+            node.alternate.preprocessor = this.maybeAddSkip(this.branchLocationFor(bName, 1));
+            node.consequent = astgen.sequence(ast1, node.consequent);
+            node.alternate = astgen.sequence(ast2, node.alternate);
+        },
+
+        maybeAddSkip: function (branchLocation) {
+            return function (node) {
+                var alreadyIgnoring = !!this.currentState.ignoring,
+                    hint = this.currentState.currentHint,
+                    ignoreThis = !alreadyIgnoring && hint && hint.type === 'next';
+                if (ignoreThis) {
+                    this.startIgnore();
+                    node.postprocessor = this.endIgnore;
+                }
+                if (ignoreThis || alreadyIgnoring) {
+                    branchLocation.skip = true;
+                }
+            };
+        },
+
+        logicalExpressionBranchInjector: function (node, walker) {
+            var parent = walker.parent(),
+                leaves = [],
+                bName,
+                tuple,
+                i;
+
+            this.maybeSkipNode(node, 'next');
+
+            if (parent && parent.node.type === SYNTAX.LogicalExpression.name) {
+                //already covered
+                return;
+            }
+
+            this.findLeaves(node, leaves);
+            bName = this.branchName('binary-expr',
+                walker.startLineForNode(node),
+                this.locationsForNodes(leaves.map(function (item) { return item.node; }))
+            );
+            for (i = 0; i < leaves.length; i += 1) {
+                tuple = leaves[i];
+                tuple.parent[tuple.property] = astgen.sequence(this.branchIncrementExprAst(bName, i), tuple.node);
+                tuple.node.preprocessor = this.maybeAddSkip(this.branchLocationFor(bName, i));
+            }
+        },
+
+        findLeaves: function (node, accumulator, parent, property) {
+            if (node.type === SYNTAX.LogicalExpression.name) {
+                this.findLeaves(node.left, accumulator, node, 'left');
+                this.findLeaves(node.right, accumulator, node, 'right');
+            } else {
+                accumulator.push({ node: node, parent: parent, property: property });
+            }
+        },
+        maybeAddType: function (node /*, walker */) {
+            var props = node.properties,
+                i,
+                child;
+            for (i = 0; i < props.length; i += 1) {
+                child = props[i];
+                if (!child.type) {
+                    child.type = SYNTAX.Property.name;
+                }
+            }
+        },
+    };
+
+    if (isNode) {
+        module.exports = Instrumenter;
+    } else {
+        window.Instrumenter = Instrumenter;
+    }
+
+}(typeof module !== 'undefined' && typeof module.exports !== 'undefined' && typeof exports !== 'undefined'));
diff --git a/testlib/selenium/runtime.js b/testlib/selenium/runtime.js
index 58a6e45c1..5a23c19a0 100644
--- a/testlib/selenium/runtime.js
+++ b/testlib/selenium/runtime.js
@@ -35,12 +35,23 @@ var httpPort = 8080;
 
 var p = `http://localhost:${httpPort}/testlib/selenium/testhost.html`;
 
-var argv = require('minimist')(process.argv.slice(2), {"boolean": ["keep-open"]});
+var argv = require('minimist')(process.argv.slice(2), {"boolean": ["keep-open", "coverage"]});
 
 function printUsage() {
   console.log(`Usage: [--keep-open] TESTSCRIPT`);
 }
 
+function randId(n) {
+  let s = "";
+  var choices = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789";
+
+  for (let i = 0; i < n; i++) {
+    s += choices.charAt(Math.floor(Math.random() * choices.length));
+  }
+
+  return s;
+}
+
 if (argv._.length != 1) {
   console.log("exactly one test script must be given");
   printUsage();
@@ -48,6 +59,7 @@ if (argv._.length != 1) {
 }
 
 var testScriptName = path.resolve(argv._[0]);
+var testName = path.basename(testScriptName, ".js");
 var projectRoot = path.resolve(__dirname, "../../") + "/";
 if (!testScriptName.startsWith(projectRoot)) {
   console.log("test file must be inside wallet project root");
@@ -119,6 +131,9 @@ var driver = new webdriver.Builder()
   .build();
 
 driver.get(p);
+if (argv["coverage"]) {
+  driver.executeScript("window.requestCoverage = true;");
+}
 driver.executeScript(script);
 driver.wait(untilTestOver);
 
@@ -136,9 +151,23 @@ driver.manage().logs().get("browser").then((logs) => {
     console.log(l.message.substring(s2));
   }
 
-  if (!argv["keep-open"]) {
-    driver.quit();
-    l.close();
-  }
+  let coverage = driver.executeScript("return JSON.stringify(window.__coverage__);");
+  coverage.then((covStr) => {
+    let cov = JSON.parse(covStr);
+    if (cov) {
+      let covTranslated = {};
+      for (let f in cov) {
+        let p = path.resolve(projectRoot, f);
+        let c = covTranslated[p] = cov[f];
+        c.path = p;
+      }
+      fs.writeFileSync(`coverage-${testName}-${randId(5)}.json`, JSON.stringify(covTranslated));
+    }
+    if (!argv["keep-open"]) {
+      driver.quit();
+      l.close();
+    }
+  })
+
 });
 
diff --git a/testlib/selenium/system.js b/testlib/selenium/system.js
new file mode 100644
index 000000000..1b7c1f82f
--- /dev/null
+++ b/testlib/selenium/system.js
@@ -0,0 +1,6 @@
+/*
+ * SystemJS v0.19.41
+ */
+!function(){function e(){!function(e){function t(e,r){if("string"!=typeof e)throw new TypeError("URL must be a string");var n=String(e).replace(/^\s+|\s+$/g,"").match(/^([^:\/?#]+:)?(?:\/\/(?:([^:@\/?#]*)(?::([^:@\/?#]*))?@)?(([^:\/?#]*)(?::(\d*))?))?([^?#]*)(\?[^#]*)?(#[\s\S]*)?/);if(!n)throw new RangeError("Invalid URL format");var a=n[1]||"",o=n[2]||"",i=n[3]||"",s=n[4]||"",l=n[5]||"",u=n[6]||"",d=n[7]||"",c=n[8]||"",f=n[9]||"";if(void 0!==r){var m=r instanceof t?r:new t(r),p=!a&&!s&&!o;!p||d||c||(c=m.search),p&&"/"!==d[0]&&(d=d?(!m.host&&!m.username||m.pathname?"":"/")+m.pathname.slice(0,m.pathname.lastIndexOf("/")+1)+d:m.pathname);var h=[];d.replace(/^(\.\.?(\/|$))+/,"").replace(/\/(\.(\/|$))+/g,"/").replace(/\/\.\.$/,"/../").replace(/\/?[^\/]*/g,function(e){"/.."===e?h.pop():h.push(e)}),d=h.join("").replace(/^\//,"/"===d[0]?"/":""),p&&(u=m.port,l=m.hostname,s=m.host,i=m.password,o=m.username),a||(a=m.protocol)}d=d.replace(/\\/g,"/"),this.origin=s?a+(""!==a||""!==s?"//":"")+s:"",this.href=a+(a&&s||"file:"==a?"//":"")+(""!==o?o+(""!==i?":"+i:"")+"@":"")+s+d+c+f,this.protocol=a,this.username=o,this.password=i,this.host=s,this.hostname=l,this.port=u,this.pathname=d,this.search=c,this.hash=f}e.URLPolyfill=t}("undefined"!=typeof self?self:global),function(e){function t(e,t){if(!e.originalErr)for(var r=((e.message||e)+(e.stack?"\n"+e.stack:"")).toString().split("\n"),n=[],a=0;a<r.length;a++)"undefined"!=typeof $__curScript&&r[a].indexOf($__curScript.src)!=-1||n.push(r[a]);var o="(SystemJS) "+(n?n.join("\n\t"):e.message.substr(11))+"\n\t"+t;F||(o=o.replace(D?/file:\/\/\//g:/file:\/\//g,""));var i=J?new 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diff --git a/testlib/selenium/testhost.html b/testlib/selenium/testhost.html
index 2fb9cb533..b75c99e7e 100644
--- a/testlib/selenium/testhost.html
+++ b/testlib/selenium/testhost.html
@@ -2,8 +2,37 @@
 <html>
   <head>
     <title>Browser Test Host</title>
-    <script src="/lib/vendor/system-csp-production.src.js"></script>
+
+    <script src="/testlib/selenium/esprima.js"></script>
+    <script src="/testlib/selenium/escodegen.browser.js"></script>
+    <script src="/testlib/selenium/instrumenter.js"></script>
+
+    <!-- for instrumentation to work, we have to use the non-csp version -->
+    <script src="/testlib/selenium/system.js"></script>
+
     <script>
+
+    var requestCoverage = false;
+
+    let parser = document.createElement('a');
+
+    let oldTranslate = System.translate.bind(System);
+    System.translate = (load) => {
+      if (!requestCoverage) {
+        return oldTranslate(load);
+      }
+      let inst = new Instrumenter();
+      let srcP = oldTranslate(load);
+
+      console.dir(load);
+
+      return Promise.resolve(srcP).then((src) => {
+        parser.href = load.name;
+        let modName = parser.pathname.substring(1);
+        return inst.instrumentSync(src, modName);
+      });
+    }
+
     System.config({
         baseURL: "/",
         defaultJSExtensions: true,