Sha256: 93bb2c0dd7f13ac5058c911e50520a9a929c71f45a41470ca7943143567c820e
Contents?: true
Size: 1.62 KB
Versions: 27
Compression:
Stored size: 1.62 KB
Contents
'use strict';
var GetIntrinsic = require('get-intrinsic');
var $TypeError = GetIntrinsic('%TypeError%');
var callBound = require('call-bind/callBound');
var $indexOf = callBound('String.prototype.indexOf', true);
var Canonicalize = require('./Canonicalize');
var Type = require('./Type');
var assertRecord = require('../helpers/assertRecord');
var caseFolding = require('../helpers/caseFolding');
var forEach = require('../helpers/forEach');
var OwnPropertyKeys = require('../helpers/OwnPropertyKeys');
var basicWordChars = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789_'; // step 1
// https://262.ecma-international.org/14.0/#sec-runtime-semantics-wordcharacters-abstract-operation
module.exports = function WordCharacters(rer) {
assertRecord(Type, 'RegExp Record', 'rer', rer);
var extraWordChars = '';
forEach(OwnPropertyKeys(caseFolding.C), function (c) {
if (
$indexOf(basicWordChars, c) === -1 // c not in A
&& $indexOf(basicWordChars, Canonicalize(rer, c)) > -1 // canonicalized c IS in A
) {
extraWordChars += caseFolding.C[c]; // step 3
}
});
forEach(OwnPropertyKeys(caseFolding.S), function (c) {
if (
$indexOf(basicWordChars, c) === -1 // c not in A
&& $indexOf(basicWordChars, Canonicalize(rer, c)) > -1 // canonicalized c IS in A
) {
extraWordChars += caseFolding.S[c]; // step 3
}
});
if ((!rer['[[Unicode]]'] || !rer['[[IgnoreCase]]']) && extraWordChars.length > 0) {
throw new $TypeError('Assertion failed: `extraWordChars` must be empty when `rer.[[IgnoreCase]]` and `rer.[[Unicode]]` are not both true'); // step 3
}
return basicWordChars + extraWordChars; // step 4
};
Version data entries
27 entries across 27 versions & 2 rubygems