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codeql-action/node_modules/eslint/lib/rules/utils/regular-expressions.js
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/** | |
* @fileoverview Common utils for regular expressions. | |
* @author Josh Goldberg | |
* @author Toru Nagashima | |
*/ | |
"use strict"; | |
const { RegExpValidator } = require("@eslint-community/regexpp"); | |
const REGEXPP_LATEST_ECMA_VERSION = 2024; | |
/** | |
* Checks if the given regular expression pattern would be valid with the `u` flag. | |
* @param {number} ecmaVersion ECMAScript version to parse in. | |
* @param {string} pattern The regular expression pattern to verify. | |
* @returns {boolean} `true` if the pattern would be valid with the `u` flag. | |
* `false` if the pattern would be invalid with the `u` flag or the configured | |
* ecmaVersion doesn't support the `u` flag. | |
*/ | |
function isValidWithUnicodeFlag(ecmaVersion, pattern) { | |
if (ecmaVersion <= 5) { // ecmaVersion <= 5 doesn't support the 'u' flag | |
return false; | |
} | |
const validator = new RegExpValidator({ | |
ecmaVersion: Math.min(ecmaVersion, REGEXPP_LATEST_ECMA_VERSION) | |
}); | |
try { | |
validator.validatePattern(pattern, void 0, void 0, { unicode: /* uFlag = */ true }); | |
} catch { | |
return false; | |
} | |
return true; | |
} | |
module.exports = { | |
isValidWithUnicodeFlag, | |
REGEXPP_LATEST_ECMA_VERSION | |
}; |