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48 lines
1.2 KiB
48 lines
1.2 KiB
1 week ago
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'use strict';
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var GetIntrinsic = require('get-intrinsic');
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var callBound = require('call-bound');
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var $fromCharCode = GetIntrinsic('%String.fromCharCode%');
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var $TypeError = require('es-errors/type');
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var $charCodeAt = callBound('String.prototype.charCodeAt');
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var CharSet = require('../helpers/CharSet').CharSet;
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// https://262.ecma-international.org/16.0/#sec-runtime-semantics-characterrange-abstract-operation
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module.exports = function CharacterRange(A, B) {
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if (!(A instanceof CharSet) || !(B instanceof CharSet)) {
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throw new $TypeError('Assertion failed: CharSets A and B are not both CharSets');
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}
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var a;
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A.yield(function (c) {
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if (typeof a !== 'undefined') {
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throw new $TypeError('Assertion failed: CharSet A has more than one character');
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}
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a = c;
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});
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var b;
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B.yield(function (c) {
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if (typeof b !== 'undefined') {
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throw new $TypeError('Assertion failed: CharSet B has more than one character');
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}
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b = c;
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});
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var i = $charCodeAt(a, 0);
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var j = $charCodeAt(b, 0);
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if (!(i <= j)) {
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throw new $TypeError('Assertion failed: i is not <= j');
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}
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var arr = [];
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for (var k = i; k <= j; k += 1) {
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arr[arr.length] = $fromCharCode(k);
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}
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return arr;
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};
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