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