source: imaps-frontend/node_modules/es-abstract/2018/ArrayCreate.js

'use strict';

var GetIntrinsic = require('get-intrinsic');

var $ArrayPrototype = GetIntrinsic('%Array.prototype%');
var $RangeError = require('es-errors/range');
var $SyntaxError = require('es-errors/syntax');
var $TypeError = require('es-errors/type');

var isInteger = require('../helpers/isInteger');

var hasProto = require('has-proto')();

var MAX_ARRAY_LENGTH = Math.pow(2, 32) - 1;

var $setProto = GetIntrinsic('%Object.setPrototypeOf%', true) || (
        hasProto
                ? function (O, proto) {
                        O.__proto__ = proto; // eslint-disable-line no-proto, no-param-reassign
                        return O;
                }
                : null
);

// https://262.ecma-international.org/6.0/#sec-arraycreate

module.exports = function ArrayCreate(length) {
        if (!isInteger(length) || length < 0) {
                throw new $TypeError('Assertion failed: `length` must be an integer Number >= 0');
        }
        if (length > MAX_ARRAY_LENGTH) {
                throw new $RangeError('length is greater than (2**32 - 1)');
        }
        var proto = arguments.length > 1 ? arguments[1] : $ArrayPrototype;
        var A = []; // steps 5 - 7, and 9
        if (proto !== $ArrayPrototype) { // step 8
                if (!$setProto) {
                        throw new $SyntaxError('ArrayCreate: a `proto` argument that is not `Array.prototype` is not supported in an environment that does not support setting the [[Prototype]]');
                }
                $setProto(A, proto);
        }
        if (length !== 0) { // bypasses the need for step 2
                A.length = length;
        }
        /* step 10, the above as a shortcut for the below
        OrdinaryDefineOwnProperty(A, 'length', {
                '[[Configurable]]': false,
                '[[Enumerable]]': false,
                '[[Value]]': length,
                '[[Writable]]': true
        });
        */
        return A;
};