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LibJS: Implement the GetPrototypeFromConstructor() abstract operation

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Linus Groh 2021-06-19 22:27:53 +01:00 • committed by Andreas Kling
parent 6312627218
commit 500818e73d
2 changed files with 17 additions and 0 deletions
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16
Userland/Libraries/LibJS/Runtime/AbstractOperations.cpp
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@ -140,4 +140,20 @@ GlobalObject* get_function_realm(GlobalObject& global_object, Function const& fu
return &global_object;
}
// 10.1.14 GetPrototypeFromConstructor ( constructor, intrinsicDefaultProto )
Object* get_prototype_from_constructor(GlobalObject& global_object, Function const& constructor, Object* (GlobalObject::*intrinsic_default_prototype)())
{
auto& vm = global_object.vm();
auto prototype = constructor.get(vm.names.prototype);
if (vm.exception())
return nullptr;
if (!prototype.is_object()) {
auto* realm = get_function_realm(global_object, constructor);
if (vm.exception())
return nullptr;
prototype = (realm->*intrinsic_default_prototype)();
}
return &prototype.as_object();
}
}