88 lines
3.6 KiB
JavaScript
88 lines
3.6 KiB
JavaScript
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"use strict";
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/**
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* @license
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* Copyright 2016 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 ts = require("typescript");
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var Lint = require("../index");
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var utils_1 = require("../language/utils");
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var OPTION_IGNORE_ARROW_FUNCTION_SHORTHAND = "ignore-arrow-function-shorthand";
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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.applyWithProgram = function (sourceFile, program) {
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var ignoreArrowFunctionShorthand = this.ruleArguments.indexOf(OPTION_IGNORE_ARROW_FUNCTION_SHORTHAND) !== -1;
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return this.applyWithFunction(sourceFile, function (ctx) { return walk(ctx, program.getTypeChecker()); }, { ignoreArrowFunctionShorthand: ignoreArrowFunctionShorthand });
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};
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return Rule;
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}(Lint.Rules.TypedRule));
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/* tslint:disable:object-literal-sort-keys */
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Rule.metadata = {
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ruleName: "no-void-expression",
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description: "Requires expressions of type `void` to appear in statement position.",
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optionsDescription: (_a = ["\n If `", "` is provided, `() => returnsVoid()` will be allowed.\n Otherwise, it must be written as `() => { returnsVoid(); }`."], _a.raw = ["\n If \\`", "\\` is provided, \\`() => returnsVoid()\\` will be allowed.\n Otherwise, it must be written as \\`() => { returnsVoid(); }\\`."], Lint.Utils.dedent(_a, OPTION_IGNORE_ARROW_FUNCTION_SHORTHAND)),
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options: {
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type: "array",
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items: {
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type: "string",
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enum: [OPTION_IGNORE_ARROW_FUNCTION_SHORTHAND],
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},
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minLength: 0,
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maxLength: 1,
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},
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requiresTypeInfo: 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 = "Expression has type `void`. Put it on its own line as a statement.";
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exports.Rule = Rule;
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function walk(ctx, checker) {
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var sourceFile = ctx.sourceFile, ignoreArrowFunctionShorthand = ctx.options.ignoreArrowFunctionShorthand;
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return ts.forEachChild(sourceFile, function cb(node) {
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if (isPossiblyVoidExpression(node)
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&& !isParentAllowedVoid(node)
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&& utils_1.isTypeFlagSet(checker.getTypeAtLocation(node), ts.TypeFlags.Void)) {
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ctx.addFailureAtNode(node, Rule.FAILURE_STRING);
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}
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return ts.forEachChild(node, cb);
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});
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function isParentAllowedVoid(node) {
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switch (node.parent.kind) {
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case ts.SyntaxKind.ExpressionStatement:
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return true;
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case ts.SyntaxKind.ArrowFunction:
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return ignoreArrowFunctionShorthand;
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default:
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return false;
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}
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}
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}
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function isPossiblyVoidExpression(node) {
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switch (node.kind) {
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case ts.SyntaxKind.AwaitExpression:
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case ts.SyntaxKind.CallExpression:
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case ts.SyntaxKind.TaggedTemplateExpression:
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return true;
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default:
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return false;
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}
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}
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var _a;
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