+++ /dev/null
-"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 tsutils = require("tsutils");
-var ts = require("typescript");
-var Lint = require("../index");
-var LEGAL_TYPEOF_RESULTS = new Set([
- "undefined",
- "string",
- "boolean",
- "number",
- "function",
- "object",
- "symbol",
-]);
-var Rule = /** @class */ (function (_super) {
- tslib_1.__extends(Rule, _super);
- function Rule() {
- return _super !== null && _super.apply(this, arguments) || this;
- }
- Rule.prototype.apply = function (sourceFile) {
- return this.applyWithFunction(sourceFile, walk);
- };
- /* tslint:disable:object-literal-sort-keys */
- Rule.metadata = {
- ruleName: "typeof-compare",
- description: "Makes sure result of `typeof` is compared to correct string values",
- optionsDescription: "Not configurable.",
- options: null,
- optionExamples: [true],
- type: "functionality",
- typescriptOnly: false,
- deprecationMessage: !/^2\.1\./.test(ts.version)
- ? "Starting from TypeScript 2.2 the compiler includes this check which makes this rule redundant."
- : "",
- };
- /* tslint:enable:object-literal-sort-keys */
- Rule.FAILURE_STRING = "'typeof' expression must be compared to one of: " + Array.from(LEGAL_TYPEOF_RESULTS)
- .map(function (x) { return "\"" + x + "\""; })
- .join(", ");
- return Rule;
-}(Lint.Rules.AbstractRule));
-exports.Rule = Rule;
-function walk(ctx) {
- ts.forEachChild(ctx.sourceFile, function cb(node) {
- if (tsutils.isBinaryExpression(node)) {
- var operatorToken = node.operatorToken, left = node.left, right = node.right;
- if (Lint.getEqualsKind(operatorToken) !== undefined &&
- (isFaultyTypeof(left, right) || isFaultyTypeof(right, left))) {
- ctx.addFailureAtNode(node, Rule.FAILURE_STRING);
- }
- }
- ts.forEachChild(node, cb);
- });
-}
-function isFaultyTypeof(left, right) {
- return left.kind === ts.SyntaxKind.TypeOfExpression && isFaultyTypeofResult(right);
-}
-function isFaultyTypeofResult(node) {
- switch (node.kind) {
- case ts.SyntaxKind.StringLiteral:
- return !LEGAL_TYPEOF_RESULTS.has(node.text);
- case ts.SyntaxKind.Identifier:
- return node.originalKeywordKind === ts.SyntaxKind.UndefinedKeyword;
- case ts.SyntaxKind.NullKeyword:
- case ts.SyntaxKind.NumericLiteral:
- case ts.SyntaxKind.TrueKeyword:
- case ts.SyntaxKind.FalseKeyword:
- case ts.SyntaxKind.ObjectLiteralExpression:
- case ts.SyntaxKind.ArrayLiteralExpression:
- return true;
- default:
- return false;
- }
-}