Tim van der Lippe | bc3a0b7 | 2021-11-08 15:22:37 | [diff] [blame] | 1 | 'use strict'; |
| 2 | |
| 3 | var GetIntrinsic = require('get-intrinsic'); |
| 4 | var callBound = require('call-bind/callBound'); |
| 5 | |
| 6 | var $fromCharCode = GetIntrinsic('%String.fromCharCode%'); |
Nikolay Vitkov | d76576c | 2024-12-02 14:10:15 | [diff] [blame] | 7 | var $TypeError = require('es-errors/type'); |
| 8 | var $charCodeAt = callBound('String.prototype.charCodeAt'); |
| 9 | var $push = callBound('Array.prototype.push'); |
Tim van der Lippe | bc3a0b7 | 2021-11-08 15:22:37 | [diff] [blame] | 10 | |
| 11 | module.exports = function CharacterRange(A, B) { |
| 12 | if (A.length !== 1 || B.length !== 1) { |
| 13 | throw new $TypeError('Assertion failed: CharSets A and B contain exactly one character'); |
| 14 | } |
| 15 | |
| 16 | var a = A[0]; |
| 17 | var b = B[0]; |
| 18 | |
| 19 | var i = $charCodeAt(a, 0); |
| 20 | var j = $charCodeAt(b, 0); |
| 21 | |
| 22 | if (!(i <= j)) { |
| 23 | throw new $TypeError('Assertion failed: i is not <= j'); |
| 24 | } |
| 25 | |
| 26 | var arr = []; |
| 27 | for (var k = i; k <= j; k += 1) { |
| 28 | $push(arr, $fromCharCode(k)); |
| 29 | } |
| 30 | return arr; |
| 31 | }; |