33 lines
1.0 KiB
Plaintext
33 lines
1.0 KiB
Plaintext
'use strict';
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var GetIntrinsic = require('get-intrinsic');
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var $Function = GetIntrinsic('%Function%');
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var $TypeError = GetIntrinsic('%TypeError%');
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var $SyntaxError = GetIntrinsic('%SyntaxError%');
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var Get = require('./Get');
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var IsConstructor = require('./IsConstructor');
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var Type = require('./Type');
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// https://262.ecma-international.org/6.0/#sec-getprototypefromconstructor
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module.exports = function GetPrototypeFromConstructor(constructor, intrinsicDefaultProto) {
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var intrinsic = GetIntrinsic(intrinsicDefaultProto); // throws if not a valid intrinsic
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if (Type(intrinsic) !== 'Object') {
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throw new $TypeError('intrinsicDefaultProto must be an object');
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}
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if (!IsConstructor(constructor)) {
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throw new $TypeError('Assertion failed: `constructor` must be a constructor');
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}
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var proto = Get(constructor, 'prototype');
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if (Type(proto) !== 'Object') {
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if (!(constructor instanceof $Function)) {
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// ignore other realms, for now
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throw new $SyntaxError('cross-realm constructors not currently supported');
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}
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proto = intrinsic;
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}
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return proto;
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};
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