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"use strict";
/**
* @license
* Copyright 2013 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 utils = 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;
}
/* tslint:enable:object-literal-sort-keys */
Rule.FAILURE_STRING = function (name) {
return "Duplicate variable: '" + name + "'";
};
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-duplicate-variable",
description: "Disallows duplicate variable declarations in the same block scope.",
descriptionDetails: (_a = ["\n This rule is only useful when using the `var` keyword -\n the compiler will detect redeclarations of `let` and `const` variables."], _a.raw = ["\n This rule is only useful when using the \\`var\\` keyword -\n the compiler will detect redeclarations of \\`let\\` and \\`const\\` variables."], Lint.Utils.dedent(_a)),
rationale: (_b = ["\n A variable can be reassigned if necessary -\n there's no good reason to have a duplicate variable declaration."], _b.raw = ["\n A variable can be reassigned if necessary -\n there's no good reason to have a duplicate variable declaration."], Lint.Utils.dedent(_b)),
optionsDescription: "Not configurable.",
options: null,
optionExamples: [true],
type: "functionality",
typescriptOnly: false,
};
exports.Rule = Rule;
function walk(ctx) {
var scope = new Set();
return ts.forEachChild(ctx.sourceFile, function cb(node) {
if (utils.isFunctionScopeBoundary(node)) {
var oldScope = scope;
scope = new Set();
ts.forEachChild(node, cb);
scope = oldScope;
return;
}
else if (utils.isVariableDeclaration(node) && !utils.isBlockScopedVariableDeclaration(node)) {
forEachBoundIdentifier(node.name, function (id) {
var text = id.text;
if (scope.has(text)) {
ctx.addFailureAtNode(id, Rule.FAILURE_STRING(text));
}
else {
scope.add(text);
}
});
}
return ts.forEachChild(node, cb);
});
}
function forEachBoundIdentifier(name, action) {
if (name.kind === ts.SyntaxKind.Identifier) {
action(name);
}
else {
for (var _i = 0, _a = name.elements; _i < _a.length; _i++) {
var e = _a[_i];
if (e.kind !== ts.SyntaxKind.OmittedExpression) {
forEachBoundIdentifier(e.name, action);
}
}
}
}
var _a, _b;
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