1 files changed, 77 insertions, 0 deletions
diff --git a/node_modules/tslint/lib/rules/noStringThrowRule.js b/node_modules/tslint/lib/rules/noStringThrowRule.js
new file mode 100644
index 000000000..f934407a2
--- /dev/null
+++ b/node_modules/tslint/lib/rules/noStringThrowRule.js
@@ -0,0 +1,77 @@
+"use strict";
+/**
+ * @license
+ * Copyright 2016 Palantir Technologies, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+Object.defineProperty(exports, "__esModule", { value: true });
+var tslib_1 = require("tslib");
+var tsutils_1 = require("tsutils");
+var ts = require("typescript");
+var Lint = require("../index");
+var Rule = (function (_super) {
+    tslib_1.__extends(Rule, _super);
+    function Rule() {
+        return _super !== null && _super.apply(this, arguments) || this;
+    }
+    Rule.prototype.apply = function (sourceFile) {
+        return this.applyWithFunction(sourceFile, walk);
+    };
+    return Rule;
+}(Lint.Rules.AbstractRule));
+/* tslint:disable:object-literal-sort-keys */
+Rule.metadata = {
+    ruleName: "no-string-throw",
+    description: "Flags throwing plain strings or concatenations of strings " +
+        "because only Errors produce proper stack traces.",
+    hasFix: true,
+    options: null,
+    optionsDescription: "Not configurable.",
+    type: "functionality",
+    typescriptOnly: false,
+};
+/* tslint:enable:object-literal-sort-keys */
+Rule.FAILURE_STRING = "Throwing plain strings (not instances of Error) gives no stack traces";
+exports.Rule = Rule;
+function walk(ctx) {
+    var sourceFile = ctx.sourceFile;
+    return ts.forEachChild(ctx.sourceFile, function cb(node) {
+        if (tsutils_1.isThrowStatement(node)) {
+            var expression = node.expression;
+            if (isString(expression)) {
+                ctx.addFailureAtNode(node, Rule.FAILURE_STRING, [
+                    Lint.Replacement.appendText(expression.getStart(sourceFile), "new Error("),
+                    Lint.Replacement.appendText(expression.getEnd(), ")"),
+                ]);
+            }
+        }
+        return ts.forEachChild(node, cb);
+    });
+}
+function isString(node) {
+    switch (node.kind) {
+        case ts.SyntaxKind.StringLiteral:
+        case ts.SyntaxKind.NoSubstitutionTemplateLiteral:
+        case ts.SyntaxKind.TemplateExpression:
+            return true;
+        case ts.SyntaxKind.BinaryExpression: {
+            var _a = node, operatorToken = _a.operatorToken, left = _a.left, right = _a.right;
+            return operatorToken.kind === ts.SyntaxKind.PlusToken && (isString(left) || isString(right));
+        }
+        case ts.SyntaxKind.ParenthesizedExpression:
+            return isString(node.expression);
+        default:
+            return false;
+    }
+}