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Configuration error
Configuration error
; | |
var GetIntrinsic = require('get-intrinsic'); | |
var $TypeError = GetIntrinsic('%TypeError%'); | |
var callBound = require('call-bind/callBound'); | |
var $indexOf = callBound('String.prototype.indexOf'); | |
var IsArray = require('./IsArray'); | |
var Type = require('./Type'); | |
var WordCharacters = require('./WordCharacters'); | |
var assertRecord = require('../helpers/assertRecord'); | |
var every = require('../helpers/every'); | |
var isInteger = require('../helpers/isInteger'); | |
var isChar = function isChar(c) { | |
return typeof c === 'string'; | |
}; | |
// https://262.ecma-international.org/14.0/#sec-runtime-semantics-iswordchar-abstract-operation | |
// note: prior to ES2023, this AO erroneously omitted the latter of its arguments. | |
module.exports = function IsWordChar(rer, Input, e) { | |
assertRecord(Type, 'RegExp Record', 'rer', rer); | |
if (!IsArray(Input) || !every(Input, isChar)) { | |
throw new $TypeError('Assertion failed: `Input` must be a List of characters'); | |
} | |
if (!isInteger(e)) { | |
throw new $TypeError('Assertion failed: `e` must be an integer'); | |
} | |
var InputLength = Input.length; // step 1 | |
if (e === -1 || e === InputLength) { | |
return false; // step 2 | |
} | |
var c = Input[e]; // step 3 | |
return $indexOf(WordCharacters(rer), c) > -1; // steps 4-5 | |
}; | |