.gitignore added
[dotfiles/.git] / .config / coc / extensions / node_modules / coc-prettier / node_modules / tslint / lib / rules / typeofCompareRule.js
diff --git a/.config/coc/extensions/node_modules/coc-prettier/node_modules/tslint/lib/rules/typeofCompareRule.js b/.config/coc/extensions/node_modules/coc-prettier/node_modules/tslint/lib/rules/typeofCompareRule.js
new file mode 100644 (file)
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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 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;
+    }
+}