95 lines
4.3 KiB
JavaScript
95 lines
4.3 KiB
JavaScript
/**
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* @license
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* Copyright 2013 Palantir Technologies, Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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"use strict";
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var __extends = (this && this.__extends) || (function () {
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var extendStatics = Object.setPrototypeOf ||
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({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||
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function (d, b) { for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p]; };
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return function (d, b) {
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extendStatics(d, b);
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function __() { this.constructor = d; }
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d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
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};
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})();
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Object.defineProperty(exports, "__esModule", { value: true });
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var ts = require("typescript");
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var Lint = require("../index");
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var OPTION_ALLOW_NULL_CHECK = "allow-null-check";
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var OPTION_ALLOW_UNDEFINED_CHECK = "allow-undefined-check";
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var Rule = (function (_super) {
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__extends(Rule, _super);
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function Rule() {
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return _super !== null && _super.apply(this, arguments) || this;
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}
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Rule.prototype.apply = function (sourceFile) {
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var comparisonWalker = new ComparisonWalker(sourceFile, this.getOptions());
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return this.applyWithWalker(comparisonWalker);
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};
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return Rule;
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}(Lint.Rules.AbstractRule));
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/* tslint:disable:object-literal-sort-keys */
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Rule.metadata = {
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ruleName: "triple-equals",
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description: "Requires `===` and `!==` in place of `==` and `!=`.",
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optionsDescription: (_a = ["\n Two arguments may be optionally provided:\n\n * `\"allow-null-check\"` allows `==` and `!=` when comparing to `null`.\n * `\"allow-undefined-check\"` allows `==` and `!=` when comparing to `undefined`."], _a.raw = ["\n Two arguments may be optionally provided:\n\n * \\`\"allow-null-check\"\\` allows \\`==\\` and \\`!=\\` when comparing to \\`null\\`.\n * \\`\"allow-undefined-check\"\\` allows \\`==\\` and \\`!=\\` when comparing to \\`undefined\\`."], Lint.Utils.dedent(_a)),
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options: {
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type: "array",
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items: {
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type: "string",
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enum: [OPTION_ALLOW_NULL_CHECK, OPTION_ALLOW_UNDEFINED_CHECK],
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},
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minLength: 0,
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maxLength: 2,
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},
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optionExamples: ["true", '[true, "allow-null-check"]', '[true, "allow-undefined-check"]'],
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type: "functionality",
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typescriptOnly: false,
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};
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/* tslint:enable:object-literal-sort-keys */
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Rule.EQ_FAILURE_STRING = "== should be ===";
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Rule.NEQ_FAILURE_STRING = "!= should be !==";
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exports.Rule = Rule;
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var ComparisonWalker = (function (_super) {
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__extends(ComparisonWalker, _super);
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function ComparisonWalker() {
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var _this = _super !== null && _super.apply(this, arguments) || this;
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_this.allowNull = _this.hasOption(OPTION_ALLOW_NULL_CHECK);
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_this.allowUndefined = _this.hasOption(OPTION_ALLOW_UNDEFINED_CHECK);
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return _this;
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}
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ComparisonWalker.prototype.visitBinaryExpression = function (node) {
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var eq = Lint.getEqualsKind(node.operatorToken);
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if (eq && !eq.isStrict && !this.isExpressionAllowed(node)) {
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this.addFailureAtNode(node.operatorToken, eq.isPositive ? Rule.EQ_FAILURE_STRING : Rule.NEQ_FAILURE_STRING);
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}
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_super.prototype.visitBinaryExpression.call(this, node);
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};
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ComparisonWalker.prototype.isExpressionAllowed = function (_a) {
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var _this = this;
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var left = _a.left, right = _a.right;
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var isAllowed = function (n) {
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return n.kind === ts.SyntaxKind.NullKeyword ? _this.allowNull
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: _this.allowUndefined &&
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n.kind === ts.SyntaxKind.Identifier &&
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n.originalKeywordKind === ts.SyntaxKind.UndefinedKeyword;
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};
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return isAllowed(left) || isAllowed(right);
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};
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return ComparisonWalker;
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}(Lint.RuleWalker));
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var _a;
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