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"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 tsutils_1 = require("tsutils");
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;
}
/* tslint:enable:object-literal-sort-keys */
Rule.FAILURE_STRING = function (name) {
return "Reassigning parameter '" + name + "' is forbidden.";
};
Rule.prototype.apply = function (sourceFile) {
return this.applyWithFunction(sourceFile, walk);
};
/* tslint:disable:object-literal-sort-keys */
Rule.metadata = {
ruleName: "no-parameter-reassignment",
description: "Disallows reassigning parameters.",
optionsDescription: "Not configurable.",
options: null,
optionExamples: [true],
type: "typescript",
typescriptOnly: false,
};
return Rule;
}(Lint.Rules.AbstractRule));
exports.Rule = Rule;
function walk(ctx) {
tsutils_1.collectVariableUsage(ctx.sourceFile).forEach(function (variable, identifier) {
if (!isParameter(identifier.parent)) {
return;
}
for (var _i = 0, _a = variable.uses; _i < _a.length; _i++) {
var use = _a[_i];
if (tsutils_1.isReassignmentTarget(use.location)) {
ctx.addFailureAtNode(use.location, Rule.FAILURE_STRING(identifier.text));
}
}
});
}
function isParameter(node) {
switch (node.kind) {
case ts.SyntaxKind.Parameter:
return true;
case ts.SyntaxKind.BindingElement:
return tsutils_1.getDeclarationOfBindingElement(node).kind === ts.SyntaxKind.Parameter;
default:
return false;
}
}
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