46 lines
1.3 KiB
JavaScript
46 lines
1.3 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 IsInteger = require('./IsInteger');
|
|
var WordCharacters = require('./WordCharacters');
|
|
|
|
var every = require('../helpers/every');
|
|
|
|
var isChar = function isChar(c) {
|
|
return typeof c === 'string';
|
|
};
|
|
|
|
// https://262.ecma-international.org/8.0/#sec-runtime-semantics-iswordchar-abstract-operation
|
|
|
|
// note: prior to ES2023, this AO erroneously omitted the latter of its arguments.
|
|
module.exports = function IsWordChar(e, InputLength, Input, IgnoreCase, Unicode) {
|
|
if (!IsInteger(e)) {
|
|
throw new $TypeError('Assertion failed: `e` must be an integer');
|
|
}
|
|
if (!IsInteger(InputLength)) {
|
|
throw new $TypeError('Assertion failed: `InputLength` must be an integer');
|
|
}
|
|
if (!IsArray(Input) || !every(Input, isChar)) {
|
|
throw new $TypeError('Assertion failed: `Input` must be a List of characters');
|
|
}
|
|
if (typeof IgnoreCase !== 'boolean' || typeof Unicode !== 'boolean') {
|
|
throw new $TypeError('Assertion failed: `IgnoreCase` and `Unicode` must be booleans');
|
|
}
|
|
|
|
if (e === -1 || e === InputLength) {
|
|
return false; // step 1
|
|
}
|
|
|
|
var c = Input[e]; // step 2
|
|
|
|
var wordChars = WordCharacters(IgnoreCase, Unicode);
|
|
|
|
return $indexOf(wordChars, c) > -1; // steps 3-4
|
|
};
|