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authorGravatar Piotr Russ <mail@pruss.it> 2020-11-16 00:10:28 +0100
committerGravatar Piotr Russ <mail@pruss.it> 2020-11-16 00:10:28 +0100
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diff --git a/node_modules/es-abstract/2015/ArraySpeciesCreate.js b/node_modules/es-abstract/2015/ArraySpeciesCreate.js
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+'use strict';
+
+var GetIntrinsic = require('../GetIntrinsic');
+
+var $Array = GetIntrinsic('%Array%');
+var $species = GetIntrinsic('%Symbol.species%', true);
+var $TypeError = GetIntrinsic('%TypeError%');
+
+var Get = require('./Get');
+var IsArray = require('./IsArray');
+var IsConstructor = require('./IsConstructor');
+var IsInteger = require('./IsInteger');
+var Type = require('./Type');
+
+// https://ecma-international.org/ecma-262/6.0/#sec-arrayspeciescreate
+
+module.exports = function ArraySpeciesCreate(originalArray, length) {
+ if (!IsInteger(length) || length < 0) {
+ throw new $TypeError('Assertion failed: length must be an integer >= 0');
+ }
+ var len = length === 0 ? 0 : length;
+ var C;
+ var isArray = IsArray(originalArray);
+ if (isArray) {
+ C = Get(originalArray, 'constructor');
+ // TODO: figure out how to make a cross-realm normal Array, a same-realm Array
+ // if (IsConstructor(C)) {
+ // if C is another realm's Array, C = undefined
+ // Object.getPrototypeOf(Object.getPrototypeOf(Object.getPrototypeOf(Array))) === null ?
+ // }
+ if ($species && Type(C) === 'Object') {
+ C = Get(C, $species);
+ if (C === null) {
+ C = void 0;
+ }
+ }
+ }
+ if (typeof C === 'undefined') {
+ return $Array(len);
+ }
+ if (!IsConstructor(C)) {
+ throw new $TypeError('C must be a constructor');
+ }
+ return new C(len); // Construct(C, len);
+};
+