4 * Copyright 2017 Palantir Technologies, Inc.
6 * Licensed under the Apache License, Version 2.0 (the "License");
7 * you may not use this file except in compliance with the License.
8 * You may obtain a copy of the License at
10 * http://www.apache.org/licenses/LICENSE-2.0
12 * Unless required by applicable law or agreed to in writing, software
13 * distributed under the License is distributed on an "AS IS" BASIS,
14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15 * See the License for the specific language governing permissions and
16 * limitations under the License.
18 Object.defineProperty(exports, "__esModule", { value: true });
19 var tslib_1 = require("tslib");
20 var tsutils_1 = require("tsutils");
21 var ts = require("typescript");
22 var Lint = require("../index");
23 var Rule = /** @class */ (function (_super) {
24 tslib_1.__extends(Rule, _super);
26 return _super !== null && _super.apply(this, arguments) || this;
28 /* tslint:enable:object-literal-sort-keys */
29 Rule.FAILURE_STRING = function (name) {
30 return "Reassigning parameter '" + name + "' is forbidden.";
32 Rule.prototype.apply = function (sourceFile) {
33 return this.applyWithFunction(sourceFile, walk);
35 /* tslint:disable:object-literal-sort-keys */
37 ruleName: "no-parameter-reassignment",
38 description: "Disallows reassigning parameters.",
39 optionsDescription: "Not configurable.",
41 optionExamples: [true],
43 typescriptOnly: false,
46 }(Lint.Rules.AbstractRule));
49 tsutils_1.collectVariableUsage(ctx.sourceFile).forEach(function (variable, identifier) {
50 if (!isParameter(identifier.parent)) {
53 for (var _i = 0, _a = variable.uses; _i < _a.length; _i++) {
55 if (tsutils_1.isReassignmentTarget(use.location)) {
56 ctx.addFailureAtNode(use.location, Rule.FAILURE_STRING(identifier.text));
61 function isParameter(node) {
63 case ts.SyntaxKind.Parameter:
65 case ts.SyntaxKind.BindingElement:
66 return (tsutils_1.getDeclarationOfBindingElement(node).kind ===
67 ts.SyntaxKind.Parameter);