hatch-surf/node_modules/es-abstract/2024/CharacterComplement.js
Riley Zhang df378d33ef
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Merge GitHub main into Gitea repo (allow unrelated histories)
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Co-Authored-By: Paperclip <noreply@paperclip.ing>
2026-06-25 05:20:46 +02:00

35 lines
885 B
JavaScript

'use strict';
var $TypeError = require('es-errors/type');
var AllCharacters = require('./AllCharacters');
var CharSet = require('../helpers/CharSet').CharSet;
var isRegExpRecord = require('../helpers/records/regexp-record');
// https://262.ecma-international.org/15.0/#sec-charactercomplement
module.exports = function CharacterComplement(rer, S) {
if (!isRegExpRecord(rer)) {
throw new $TypeError('Assertion failed: `rer` must be a RegExp Record');
}
if (!(S instanceof CharSet)) {
throw new $TypeError('Assertion failed: S must be a CharSet');
}
var A = AllCharacters(rer); // step 1
// 2. Return the CharSet containing the CharSetElements of A which are not also CharSetElements of S.
return new CharSet(
function (x) { return !S.test(x) && A.test(x); },
function (emit) {
A.yield(function (x) {
if (!S.test(x)) {
emit(x);
}
});
}
);
};