eslint-plugin-sonarjs
Version:
SonarJS rules for ESLint
57 lines (56 loc) • 2.32 kB
JavaScript
;
/*
* SonarQube JavaScript Plugin
* Copyright (C) 2011-2025 SonarSource SA
* mailto:info AT sonarsource DOT com
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the Sonar Source-Available License Version 1, as published by SonarSource SA.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
* See the Sonar Source-Available License for more details.
*
* You should have received a copy of the Sonar Source-Available License
* along with this program; if not, see https://sonarsource.com/license/ssal/
*/
// https://sonarsource.github.io/rspec/#/rspec/S3735/javascript
Object.defineProperty(exports, "__esModule", { value: true });
exports.rule = void 0;
const index_js_1 = require("../helpers/index.js");
const meta_js_1 = require("./meta.js");
exports.rule = {
meta: (0, index_js_1.generateMeta)(meta_js_1.meta, {
messages: {
removeVoid: 'Remove this use of the "void" operator.',
},
}),
create(context) {
const services = context.sourceCode.parserServices;
function checkNode(node) {
const unaryExpression = node;
if (isVoid0(unaryExpression) || isIIFE(unaryExpression) || isPromiseLike(unaryExpression)) {
return;
}
const operatorToken = context.sourceCode.getTokenBefore(unaryExpression.argument);
context.report({
loc: operatorToken.loc, // cannot be null due to previous checks
messageId: 'removeVoid',
});
}
function isVoid0(expr) {
return expr.argument.type === 'Literal' && 0 === expr.argument.value;
}
function isIIFE(expr) {
return (expr.argument.type === 'CallExpression' &&
['ArrowFunctionExpression', 'FunctionExpression'].includes(expr.argument.callee.type));
}
function isPromiseLike(expr) {
return (0, index_js_1.isRequiredParserServices)(services) && (0, index_js_1.isThenable)(expr.argument, services);
}
return {
'UnaryExpression[operator="void"]': checkNode,
};
},
};