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- 'use strict';
- 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 IsIntegralNumber = require('./IsIntegralNumber');
- var Type = require('./Type');
- var WordCharacters = require('./WordCharacters');
- var every = require('../helpers/every');
- var isChar = function isChar(c) {
- return typeof c === 'string';
- };
- // https://262.ecma-international.org/12.0/#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 (!IsIntegralNumber(e)) {
- throw new $TypeError('Assertion failed: `e` must be an integer');
- }
- if (!IsIntegralNumber(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 (Type(IgnoreCase) !== 'Boolean' || Type(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
- };
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