hatch-surf/node_modules/es-abstract/2016/IsWordChar.js
Riley Zhang df378d33ef
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Merge GitHub main into Gitea repo (allow unrelated histories)
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Co-Authored-By: Paperclip <noreply@paperclip.ing>
2026-06-25 05:20:46 +02:00

38 lines
1.1 KiB
JavaScript

'use strict';
var $TypeError = require('es-errors/type');
var IsArray = require('./IsArray');
var IsInteger = require('./IsInteger');
var every = require('../helpers/every');
var regexTester = require('safe-regex-test');
var isChar = function isChar(c) {
return typeof c === 'string' && c.length === 1;
};
var isWordCharacter = regexTester(/^[a-zA-Z0-9_]$/);
// https://262.ecma-international.org/6.0/#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) {
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 (e === -1 || e === InputLength) {
return false; // step 1
}
var c = Input[e]; // step 2
return isWordCharacter(c); // steps 3-4
};