| 'use strict'; |
| |
| var GetIntrinsic = require('get-intrinsic'); |
| |
| 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; |
| }; |