diff options
Diffstat (limited to 'node_modules/tslint/lib/rules/noStringThrowRule.js')
-rw-r--r-- | node_modules/tslint/lib/rules/noStringThrowRule.js | 77 |
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; + } +} |