[d565449] | 1 | 'use strict';
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| 2 |
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| 3 | var GetIntrinsic = require('get-intrinsic');
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| 4 |
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| 5 | var $species = GetIntrinsic('%Symbol.species%', true);
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| 6 | var $TypeError = require('es-errors/type');
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| 7 |
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| 8 | var ArrayCreate = require('./ArrayCreate');
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| 9 | var Get = require('./Get');
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| 10 | var IsArray = require('./IsArray');
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| 11 | var IsConstructor = require('./IsConstructor');
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| 12 | var Type = require('./Type');
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| 13 |
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| 14 | var isInteger = require('../helpers/isInteger');
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| 15 |
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| 16 | // https://262.ecma-international.org/12.0/#sec-arrayspeciescreate
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| 17 |
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| 18 | module.exports = function ArraySpeciesCreate(originalArray, length) {
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| 19 | if (!isInteger(length) || length < 0) {
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| 20 | throw new $TypeError('Assertion failed: length must be an integer >= 0');
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| 21 | }
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| 22 |
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| 23 | var isArray = IsArray(originalArray);
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| 24 | if (!isArray) {
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| 25 | return ArrayCreate(length);
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| 26 | }
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| 27 |
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| 28 | var C = Get(originalArray, 'constructor');
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| 29 | // TODO: figure out how to make a cross-realm normal Array, a same-realm Array
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| 30 | // if (IsConstructor(C)) {
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| 31 | // if C is another realm's Array, C = undefined
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| 32 | // Object.getPrototypeOf(Object.getPrototypeOf(Object.getPrototypeOf(Array))) === null ?
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| 33 | // }
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| 34 | if ($species && Type(C) === 'Object') {
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| 35 | C = Get(C, $species);
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| 36 | if (C === null) {
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| 37 | C = void 0;
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| 38 | }
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| 39 | }
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| 40 |
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| 41 | if (typeof C === 'undefined') {
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| 42 | return ArrayCreate(length);
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| 43 | }
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| 44 | if (!IsConstructor(C)) {
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| 45 | throw new $TypeError('C must be a constructor');
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| 46 | }
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| 47 | return new C(length); // Construct(C, length);
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| 48 | };
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| 49 |
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