proto-from-ctor-realm.js (1612B)
1 // Copyright (C) 2019 Leo Balter. All rights reserved. 2 // This code is governed by the BSD license found in the LICENSE file. 3 /*--- 4 esid: sec-Intl.DisplayNames 5 description: Default [[Prototype]] value derived from realm of the newTarget 6 info: | 7 Intl.DisplayNames ( locales , options ) 8 9 1. If NewTarget is undefined, throw a TypeError exception. 10 2. Let displayNames be ? OrdinaryCreateFromConstructor(NewTarget, "%DisplayNamesPrototype%", 11 « [[InitializedDisplayNames]], [[Locale]], [[Style]], [[Type]], [[Fallback]], [[Fields]] »). 12 ... 13 12. Let type be ? GetOption(options, "type", "string", « "language", "region", "script", "currency" », undefined). 14 13. If type is undefined, throw a TypeError exception. 15 16 OrdinaryCreateFromConstructor ( constructor, intrinsicDefaultProto [ , internalSlotsList ] ) 17 18 ... 19 2. Let proto be ? GetPrototypeFromConstructor(constructor, intrinsicDefaultProto). 20 3. Return ObjectCreate(proto, internalSlotsList). 21 22 GetPrototypeFromConstructor ( constructor, intrinsicDefaultProto ) 23 24 ... 25 3. Let proto be ? Get(constructor, "prototype"). 26 4. If Type(proto) is not Object, then 27 a. Let realm be ? GetFunctionRealm(constructor). 28 b. Set proto to realm's intrinsic object named intrinsicDefaultProto. 29 5. Return proto. 30 features: [Intl.DisplayNames, cross-realm, Reflect] 31 ---*/ 32 33 var other = $262.createRealm().global; 34 var C = new other.Function(); 35 C.prototype = null; 36 37 var o = Reflect.construct(Intl.DisplayNames, [undefined, {type: 'language'}], C); 38 39 assert.sameValue(Object.getPrototypeOf(o), other.Intl.DisplayNames.prototype); 40 41 reportCompare(0, 0);