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 ts = require("typescript");
21 var Lint = require("../index");
22 var Rule = /** @class */ (function (_super) {
23 tslib_1.__extends(Rule, _super);
25 return _super !== null && _super.apply(this, arguments) || this;
27 Rule.prototype.apply = function (sourceFile) {
28 return this.applyWithFunction(sourceFile, walk);
31 description: "Prevents duplicate cases in switch statements.",
32 optionExamples: [true],
34 optionsDescription: "",
35 ruleName: "no-duplicate-switch-case",
36 type: "functionality",
37 typescriptOnly: false,
39 Rule.FAILURE_STRING_FACTORY = function (text) {
40 return "Duplicate switch case: '" + text + "'.";
43 }(Lint.Rules.AbstractRule));
46 ts.forEachChild(ctx.sourceFile, function cb(node) {
47 if (node.kind === ts.SyntaxKind.CaseBlock) {
50 ts.forEachChild(node, cb);
52 function visitCaseBlock(node) {
53 var previousCases = new Set();
54 for (var _i = 0, _a = node.clauses; _i < _a.length; _i++) {
56 if (clause.kind === ts.SyntaxKind.DefaultClause) {
59 var text = clause.expression.getText(ctx.sourceFile);
60 if (!previousCases.has(text)) {
61 previousCases.add(text);
64 ctx.addFailureAtNode(clause.expression, Rule.FAILURE_STRING_FACTORY(text));