node_modules/es-abstract/2015/GetPrototypeFromConstructor.js


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'use strict';

var GetIntrinsic = require('../GetIntrinsic');

var $Function = GetIntrinsic('%Function%');
var $TypeError = GetIntrinsic('%TypeError%');

var Get = require('./Get');
var IsConstructor = require('./IsConstructor');
var Type = require('./Type');

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

module.exports = function GetPrototypeFromConstructor(constructor, intrinsicDefaultProto) {
	var intrinsic = GetIntrinsic(intrinsicDefaultProto); // throws if not a valid intrinsic
	if (!IsConstructor(constructor)) {
		throw new $TypeError('Assertion failed: `constructor` must be a constructor');
	}
	var proto = Get(constructor, 'prototype');
	if (Type(proto) !== 'Object') {
		if (!(constructor instanceof $Function)) {
			// ignore other realms, for now
			throw new $TypeError('cross-realm constructors not currently supported');
		}
		proto = intrinsic;
	}
	return proto;
};