| 'use strict'; | 
|   | 
| var GetIntrinsic = require('get-intrinsic'); | 
|   | 
| var $Function = GetIntrinsic('%Function%'); | 
| var $TypeError = GetIntrinsic('%TypeError%'); | 
| var $SyntaxError = GetIntrinsic('%SyntaxError%'); | 
|   | 
| 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 $SyntaxError('cross-realm constructors not currently supported'); | 
|         } | 
|         proto = intrinsic; | 
|     } | 
|     return proto; | 
| }; |