75 lines
3.0 KiB
JavaScript
75 lines
3.0 KiB
JavaScript
"use strict";
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/**
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* @license
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* Copyright 2017 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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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 Rule = (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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};
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/* tslint:disable:object-literal-sort-keys */
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Rule.metadata = {
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ruleName: "no-misused-new",
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description: "Warns on apparent attempts to define constructors for interfaces or `new` for classes.",
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optionsDescription: "Not configurable.",
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options: null,
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optionExamples: [true],
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type: "functionality",
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typescriptOnly: true,
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};
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/* tslint:enable:object-literal-sort-keys */
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Rule.FAILURE_STRING_INTERFACE = "Interfaces cannot be constructed, only classes. Did you mean `declare class`?";
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Rule.FAILURE_STRING_CLASS = '`new` in a class is a method named "new". Did you mean `constructor`?';
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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.isMethodSignature(node)) {
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if (tsutils_1.getPropertyName(node.name) === "constructor") {
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ctx.addFailureAtNode(node, Rule.FAILURE_STRING_INTERFACE);
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}
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}
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else if (tsutils_1.isMethodDeclaration(node)) {
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if (node.body === undefined &&
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tsutils_1.getPropertyName(node.name) === "new" &&
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returnTypeMatchesParent(node.parent, node)) {
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ctx.addFailureAtNode(node, Rule.FAILURE_STRING_CLASS);
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}
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}
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else if (tsutils_1.isConstructSignatureDeclaration(node)) {
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if (returnTypeMatchesParent(node.parent, node)) {
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ctx.addFailureAtNode(node, Rule.FAILURE_STRING_INTERFACE);
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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 returnTypeMatchesParent(parent, decl) {
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if (parent.name === undefined || decl.type === undefined || !tsutils_1.isTypeReferenceNode(decl.type)) {
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return false;
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}
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return decl.type.typeName.kind === ts.SyntaxKind.Identifier && decl.type.typeName.text === parent.name.text;
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}
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