85 lines
3.9 KiB
JavaScript
85 lines
3.9 KiB
JavaScript
"use strict";
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/**
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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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Object.defineProperty(exports, "__esModule", { value: true });
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exports.Rule = void 0;
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var tslib_1 = require("tslib");
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var tsutils_1 = require("tsutils");
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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 = /** @class */ (function (_super) {
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tslib_1.__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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return this.applyWithFunction(sourceFile, walk, {
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allowNull: this.ruleArguments.indexOf(OPTION_ALLOW_NULL_CHECK) !== -1,
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allowUndefined: this.ruleArguments.indexOf(OPTION_ALLOW_UNDEFINED_CHECK) !== -1,
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});
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};
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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: Lint.Utils.dedent(templateObject_1 || (templateObject_1 = tslib_1.__makeTemplateObject(["\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`."], ["\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\\`."]))),
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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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return Rule;
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}(Lint.Rules.AbstractRule));
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exports.Rule = Rule;
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function walk(ctx) {
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return ts.forEachChild(ctx.sourceFile, function cb(node) {
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if (tsutils_1.isBinaryExpression(node)) {
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if ((node.operatorToken.kind === ts.SyntaxKind.EqualsEqualsToken ||
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node.operatorToken.kind === ts.SyntaxKind.ExclamationEqualsToken) &&
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!(isExpressionAllowed(node.right, ctx.options) ||
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isExpressionAllowed(node.left, ctx.options))) {
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ctx.addFailureAtNode(node.operatorToken, node.operatorToken.kind === ts.SyntaxKind.EqualsEqualsToken
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? Rule.EQ_FAILURE_STRING
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: Rule.NEQ_FAILURE_STRING);
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}
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}
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return ts.forEachChild(node, cb);
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});
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}
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function isExpressionAllowed(node, options) {
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if (node.kind === ts.SyntaxKind.NullKeyword) {
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return options.allowNull;
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}
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return (options.allowUndefined &&
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node.kind === ts.SyntaxKind.Identifier &&
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node.originalKeywordKind === ts.SyntaxKind.UndefinedKeyword);
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}
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var templateObject_1;
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