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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 OPTION_CHECK_PARAMETERS = "check-parameters";
var Rule = /** @class */ (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.applyWithWalker(new NoDuplicateVariableWalker(sourceFile, this.ruleName, {
parameters: this.ruleArguments.indexOf(OPTION_CHECK_PARAMETERS) !== -1,
}));
};
/* 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: "You can specify `\"" + OPTION_CHECK_PARAMETERS + "\"` to check for variables with the same name as a paramter.",
options: {
type: "string",
enum: [OPTION_CHECK_PARAMETERS],
},
optionExamples: [
true,
[true, OPTION_CHECK_PARAMETERS],
],
type: "functionality",
typescriptOnly: false,
};
return Rule;
}(Lint.Rules.AbstractRule));
exports.Rule = Rule;
var NoDuplicateVariableWalker = /** @class */ (function (_super) {
tslib_1.__extends(NoDuplicateVariableWalker, _super);
function NoDuplicateVariableWalker() {
return _super !== null && _super.apply(this, arguments) || this;
}
NoDuplicateVariableWalker.prototype.walk = function (sourceFile) {
var _this = this;
this.scope = new Set();
var cb = function (node) {
if (utils.isFunctionScopeBoundary(node)) {
var oldScope = _this.scope;
_this.scope = new Set();
ts.forEachChild(node, cb);
_this.scope = oldScope;
return;
}
if (_this.options.parameters && utils.isParameterDeclaration(node)) {
_this.handleBindingName(node.name, false);
}
else if (utils.isVariableDeclarationList(node) && !utils.isBlockScopedVariableDeclarationList(node)) {
for (var _i = 0, _a = node.declarations; _i < _a.length; _i++) {
var variable = _a[_i];
_this.handleBindingName(variable.name, true);
}
}
return ts.forEachChild(node, cb);
};
return ts.forEachChild(sourceFile, cb);
};
NoDuplicateVariableWalker.prototype.handleBindingName = function (name, check) {
if (name.kind === ts.SyntaxKind.Identifier) {
if (check && this.scope.has(name.text)) {
this.addFailureAtNode(name, Rule.FAILURE_STRING(name.text));
}
else {
this.scope.add(name.text);
}
}
else {
for (var _i = 0, _a = name.elements; _i < _a.length; _i++) {
var e = _a[_i];
if (e.kind !== ts.SyntaxKind.OmittedExpression) {
this.handleBindingName(e.name, check);
}
}
}
};
return NoDuplicateVariableWalker;
}(Lint.AbstractWalker));
var _a, _b;
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