proto-from-ctor-realm.js (1341B)
1 // Copyright (C) 2016 the V8 project authors. All rights reserved. 2 // This code is governed by the BSD license found in the LICENSE file. 3 /*--- 4 esid: sec-generatorfunction 5 description: Default [[Prototype]] value derived from realm of the newTarget 6 info: | 7 [...] 8 3. Return ? CreateDynamicFunction(C, NewTarget, "generator", args). 9 10 19.2.1.1.1 Runtime Semantics: CreateDynamicFunction 11 12 [...] 13 3. Else, 14 [...] 15 c. Let fallbackProto be "%Generator%". 16 [...] 17 22. Let proto be ? GetPrototypeFromConstructor(newTarget, fallbackProto). 18 [...] 19 20 9.1.14 GetPrototypeFromConstructor 21 22 [...] 23 3. Let proto be ? Get(constructor, "prototype"). 24 4. If Type(proto) is not Object, then 25 a. Let realm be ? GetFunctionRealm(constructor). 26 b. Let proto be realm's intrinsic object named intrinsicDefaultProto. 27 [...] 28 features: [generators, cross-realm, Reflect] 29 ---*/ 30 31 var GeneratorFunction = Object.getPrototypeOf(function*() {}).constructor; 32 var other = $262.createRealm().global; 33 var OtherGeneratorFunction = Object.getPrototypeOf( 34 other.eval('(0, function* () {})') 35 ).constructor; 36 var C = new other.Function(); 37 C.prototype = null; 38 39 var o = Reflect.construct(GeneratorFunction, [], C); 40 41 assert.sameValue(Object.getPrototypeOf(o), OtherGeneratorFunction.prototype); 42 43 reportCompare(0, 0);