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terminal-cv/node_modules/es-abstract/2021/OrdinaryObjectCreate.js

46 lines
1.4 KiB

'use strict';
var GetIntrinsic = require('get-intrinsic');
var $ObjectCreate = GetIntrinsic('%Object.create%', true);
var $TypeError = GetIntrinsic('%TypeError%');
var $SyntaxError = GetIntrinsic('%SyntaxError%');
var IsArray = require('./IsArray');
var Type = require('./Type');
var hasProto = !({ __proto__: null } instanceof Object);
// https://262.ecma-international.org/6.0/#sec-objectcreate
module.exports = function OrdinaryObjectCreate(proto) {
if (proto !== null && Type(proto) !== 'Object') {
throw new $TypeError('Assertion failed: `proto` must be null or an object');
}
var additionalInternalSlotsList = arguments.length < 2 ? [] : arguments[1];
if (!IsArray(additionalInternalSlotsList)) {
throw new $TypeError('Assertion failed: `additionalInternalSlotsList` must be an Array');
}
// var internalSlotsList = ['[[Prototype]]', '[[Extensible]]'];
if (additionalInternalSlotsList.length > 0) {
throw new $SyntaxError('es-abstract does not yet support internal slots');
// internalSlotsList.push(...additionalInternalSlotsList);
}
// var O = MakeBasicObject(internalSlotsList);
// setProto(O, proto);
// return O;
if ($ObjectCreate) {
return $ObjectCreate(proto);
}
if (hasProto) {
return { __proto__: proto };
}
if (proto === null) {
throw new $SyntaxError('native Object.create support is required to create null objects');
}
var T = function T() {};
T.prototype = proto;
return new T();
};