--- /dev/null
+"use strict";
+/**
+ * @license
+ * Copyright 2017 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 ts = require("typescript");
+var Lint = require("../index");
+var Rule = /** @class */ (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);
+ };
+ Rule.metadata = {
+ description: "Prevents duplicate cases in switch statements.",
+ optionExamples: [true],
+ options: null,
+ optionsDescription: "",
+ ruleName: "no-duplicate-switch-case",
+ type: "functionality",
+ typescriptOnly: false,
+ };
+ Rule.FAILURE_STRING_FACTORY = function (text) {
+ return "Duplicate switch case: '" + text + "'.";
+ };
+ return Rule;
+}(Lint.Rules.AbstractRule));
+exports.Rule = Rule;
+function walk(ctx) {
+ ts.forEachChild(ctx.sourceFile, function cb(node) {
+ if (node.kind === ts.SyntaxKind.CaseBlock) {
+ visitCaseBlock(node);
+ }
+ ts.forEachChild(node, cb);
+ });
+ function visitCaseBlock(node) {
+ var previousCases = new Set();
+ for (var _i = 0, _a = node.clauses; _i < _a.length; _i++) {
+ var clause = _a[_i];
+ if (clause.kind === ts.SyntaxKind.DefaultClause) {
+ continue;
+ }
+ var text = clause.expression.getText(ctx.sourceFile);
+ if (!previousCases.has(text)) {
+ previousCases.add(text);
+ continue;
+ }
+ ctx.addFailureAtNode(clause.expression, Rule.FAILURE_STRING_FACTORY(text));
+ }
+ }
+}