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node_modules/es-abstract/2021/Canonicalize.js
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drndsv
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14 апр 2025, 22:53
14 апр 2025, 22:53
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'use strict'; var GetIntrinsic = require('get-intrinsic'); var $TypeError = GetIntrinsic('%TypeError%'); var callBound = require('call-bind/callBound'); var hasOwn = require('hasown'); var $charCodeAt = callBound('String.prototype.charCodeAt'); var $toUpperCase = callBound('String.prototype.toUpperCase'); var Type = require('./Type'); var caseFolding = require('../helpers/caseFolding'); // https://262.ecma-international.org/6.0/#sec-runtime-semantics-canonicalize-ch module.exports = function Canonicalize(ch, IgnoreCase, Unicode) { if (Type(ch) !== 'String') { throw new $TypeError('Assertion failed: `ch` must be a character'); } if (Type(IgnoreCase) !== 'Boolean' || Type(Unicode) !== 'Boolean') { throw new $TypeError('Assertion failed: `IgnoreCase` and `Unicode` must be Booleans'); } if (!IgnoreCase) { return ch; // step 1 } if (Unicode) { // step 2 if (hasOwn(caseFolding.C, ch)) { return caseFolding.C[ch]; } if (hasOwn(caseFolding.S, ch)) { return caseFolding.S[ch]; } return ch; // step 2.b } var u = $toUpperCase(ch); // step 2 if (u.length !== 1) { return ch; // step 3 } var cu = u; // step 4 if ($charCodeAt(ch, 0) >= 128 && $charCodeAt(cu, 0) < 128) { return ch; // step 5 } return cu; };