diff options
Diffstat (limited to 'node_modules/tslint/lib/rules/noMisusedNewRule.js')
-rw-r--r-- | node_modules/tslint/lib/rules/noMisusedNewRule.js | 74 |
1 files changed, 74 insertions, 0 deletions
diff --git a/node_modules/tslint/lib/rules/noMisusedNewRule.js b/node_modules/tslint/lib/rules/noMisusedNewRule.js new file mode 100644 index 000000000..51f34e5f4 --- /dev/null +++ b/node_modules/tslint/lib/rules/noMisusedNewRule.js @@ -0,0 +1,74 @@ +"use strict"; +/** + * @license + * Copyright 2017 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 Rule = (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); + }; + return Rule; +}(Lint.Rules.AbstractRule)); +/* tslint:disable:object-literal-sort-keys */ +Rule.metadata = { + ruleName: "no-misused-new", + description: "Warns on apparent attempts to define constructors for interfaces or `new` for classes.", + optionsDescription: "Not configurable.", + options: null, + optionExamples: [true], + type: "functionality", + typescriptOnly: true, +}; +/* tslint:enable:object-literal-sort-keys */ +Rule.FAILURE_STRING_INTERFACE = "Interfaces cannot be constructed, only classes. Did you mean `declare class`?"; +Rule.FAILURE_STRING_CLASS = '`new` in a class is a method named "new". Did you mean `constructor`?'; +exports.Rule = Rule; +function walk(ctx) { + return ts.forEachChild(ctx.sourceFile, function cb(node) { + if (tsutils_1.isMethodSignature(node)) { + if (tsutils_1.getPropertyName(node.name) === "constructor") { + ctx.addFailureAtNode(node, Rule.FAILURE_STRING_INTERFACE); + } + } + else if (tsutils_1.isMethodDeclaration(node)) { + if (node.body === undefined && + tsutils_1.getPropertyName(node.name) === "new" && + returnTypeMatchesParent(node.parent, node)) { + ctx.addFailureAtNode(node, Rule.FAILURE_STRING_CLASS); + } + } + else if (tsutils_1.isConstructSignatureDeclaration(node)) { + if (returnTypeMatchesParent(node.parent, node)) { + ctx.addFailureAtNode(node, Rule.FAILURE_STRING_INTERFACE); + } + } + return ts.forEachChild(node, cb); + }); +} +function returnTypeMatchesParent(parent, decl) { + if (parent.name === undefined || decl.type === undefined || !tsutils_1.isTypeReferenceNode(decl.type)) { + return false; + } + return decl.type.typeName.kind === ts.SyntaxKind.Identifier && decl.type.typeName.text === parent.name.text; +} |