eslint-plugin-sonarjs
Version:
SonarJS rules for ESLint
54 lines (53 loc) • 2 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/S5842/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");
const rule_template_js_1 = require("../helpers/regex/rule-template.js");
exports.rule = (0, rule_template_js_1.createRegExpRule)(context => {
return {
onQuantifierEnter: (node) => {
const { element } = node;
if (matchEmptyString(element)) {
context.reportRegExpNode({
message: `Rework this part of the regex to not match the empty string.`,
node: context.node,
regexpNode: element,
});
}
},
};
}, (0, index_js_1.generateMeta)(meta_js_1.meta));
function matchEmptyString(node) {
switch (node.type) {
case 'Alternative':
return node.elements.every(matchEmptyString);
case 'Assertion':
return true;
case 'CapturingGroup':
case 'Group':
case 'Pattern':
return node.alternatives.some(matchEmptyString);
case 'Quantifier':
return node.min === 0;
default:
return false;
}
}