Initial commit (from f5274cbdce4ae7c9e4b937dcdf95ac70ae436d5f)

node_modules/tslint/lib/rules/tripleEqualsRule.js

@@ -0,0 +1,83 @@
+"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_1 = require("tsutils");
+var ts = require("typescript");
+var Lint = require("../index");
+var OPTION_ALLOW_NULL_CHECK = "allow-null-check";
+var OPTION_ALLOW_UNDEFINED_CHECK = "allow-undefined-check";
+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, {
+            allowNull: this.ruleArguments.indexOf(OPTION_ALLOW_NULL_CHECK) !== -1,
+            allowUndefined: this.ruleArguments.indexOf(OPTION_ALLOW_UNDEFINED_CHECK) !== -1,
+        });
+    };
+    /* tslint:disable:object-literal-sort-keys */
+    Rule.metadata = {
+        ruleName: "triple-equals",
+        description: "Requires `===` and `!==` in place of `==` and `!=`.",
+        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\\`."]))),
+        options: {
+            type: "array",
+            items: {
+                type: "string",
+                enum: [OPTION_ALLOW_NULL_CHECK, OPTION_ALLOW_UNDEFINED_CHECK],
+            },
+            minLength: 0,
+            maxLength: 2,
+        },
+        optionExamples: [true, [true, "allow-null-check"], [true, "allow-undefined-check"]],
+        type: "functionality",
+        typescriptOnly: false,
+    };
+    /* tslint:enable:object-literal-sort-keys */
+    Rule.EQ_FAILURE_STRING = "== should be ===";
+    Rule.NEQ_FAILURE_STRING = "!= should be !==";
+    return Rule;
+}(Lint.Rules.AbstractRule));
+exports.Rule = Rule;
+function walk(ctx) {
+    return ts.forEachChild(ctx.sourceFile, function cb(node) {
+        if (tsutils_1.isBinaryExpression(node)) {
+            if ((node.operatorToken.kind === ts.SyntaxKind.EqualsEqualsToken ||
+                node.operatorToken.kind === ts.SyntaxKind.ExclamationEqualsToken) &&
+                !(isExpressionAllowed(node.right, ctx.options) ||
+                    isExpressionAllowed(node.left, ctx.options))) {
+                ctx.addFailureAtNode(node.operatorToken, node.operatorToken.kind === ts.SyntaxKind.EqualsEqualsToken
+                    ? Rule.EQ_FAILURE_STRING
+                    : Rule.NEQ_FAILURE_STRING);
+            }
+        }
+        return ts.forEachChild(node, cb);
+    });
+}
+function isExpressionAllowed(node, options) {
+    if (node.kind === ts.SyntaxKind.NullKeyword) {
+        return options.allowNull;
+    }
+    return (options.allowUndefined &&
+        node.kind === ts.SyntaxKind.Identifier &&
+        node.originalKeywordKind === ts.SyntaxKind.UndefinedKeyword);
+}
+var templateObject_1;