74 lines
3.1 KiB
JavaScript
74 lines
3.1 KiB
JavaScript
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"use strict";
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/**
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* @license
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* Copyright 2013 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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return Rule;
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}(Lint.Rules.AbstractRule));
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/* tslint:disable:object-literal-sort-keys */
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Rule.metadata = {
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ruleName: "no-empty",
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description: "Disallows empty blocks.",
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descriptionDetails: "Blocks with a comment inside are not considered empty.",
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rationale: "Empty blocks are often indicators of missing code.",
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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: false,
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};
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/* tslint:enable:object-literal-sort-keys */
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Rule.FAILURE_STRING = "block is empty";
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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 (node.kind === ts.SyntaxKind.Block &&
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node.statements.length === 0 &&
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!isExcludedConstructor(node.parent)) {
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var start = node.getStart(ctx.sourceFile);
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// Block always starts with open brace. Adding 1 to its start gives us the end of the brace,
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// which can be used to conveniently check for comments between braces
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if (Lint.hasCommentAfterPosition(ctx.sourceFile.text, start + 1)) {
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return;
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}
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return ctx.addFailure(start, node.end, Rule.FAILURE_STRING);
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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 isExcludedConstructor(node) {
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return tsutils_1.isConstructorDeclaration(node) &&
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(
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/* If constructor is private or protected, the block is allowed to be empty.
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The constructor is there on purpose to disallow instantiation from outside the class */
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/* The public modifier does not serve a purpose here. It can only be used to allow instantiation of a base class where
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the super constructor is protected. But then the block would not be empty, because of the call to super() */
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tsutils_1.hasModifier(node.modifiers, ts.SyntaxKind.PrivateKeyword, ts.SyntaxKind.ProtectedKeyword) ||
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node.parameters.some(tsutils_1.isParameterProperty));
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}
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