45 lines
1.2 KiB
JavaScript
45 lines
1.2 KiB
JavaScript
|
'use strict';
|
||
|
|
|
||
|
|
var $TypeError = require('es-errors/type');
|
||
|
|
|
||
|
|
var callBound = require('call-bind/callBound');
|
||
|
|
|
||
|
|
var $indexOf = callBound('String.prototype.indexOf');
|
||
|
|
|
||
|
|
var IsArray = require('./IsArray');
|
||
|
|
var WordCharacters = require('./WordCharacters');
|
||
|
|
|
||
|
|
var every = require('../helpers/every');
|
||
|
|
var isInteger = require('../helpers/isInteger');
|
||
|
|
var isRegExpRecord = require('../helpers/records/regexp-record');
|
||
|
|
|
||
|
|
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) {
|
||
|
|
if (!isRegExpRecord(rer)) {
|
||
|
|
throw new $TypeError('Assertion failed: `rer` must be a RegExp Record');
|
||
|
|
}
|
||
|
|
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
|
||
|
|
};
|