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LibJS: Convert internal_get_prototype_of() to ThrowCompletionOr

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This commit is contained in:
Linus Groh 2021-09-28 23:30:17 +01:00
parent c8bf7f9c41
commit 5148150e1c
14 changed files with 48 additions and 70 deletions
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38
Userland/Libraries/LibJS/Runtime/ProxyObject.cpp
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@ -45,7 +45,7 @@ static Value property_name_to_value(VM& vm, PropertyName const& name)
}
// 10.5.1 [[GetPrototypeOf]] ( ), https://tc39.es/ecma262/#sec-proxy-object-internal-methods-and-internal-slots-getprototypeof
Object* ProxyObject::internal_get_prototype_of() const
ThrowCompletionOr<Object*> ProxyObject::internal_get_prototype_of() const
{
auto& vm = this->vm();
auto& global_object = this->global_object();
@ -53,51 +53,43 @@ Object* ProxyObject::internal_get_prototype_of() const
// 1. Let handler be O.[[ProxyHandler]].
// 2. If handler is null, throw a TypeError exception.
if (m_is_revoked) {
vm.throw_exception<TypeError>(global_object, ErrorType::ProxyRevoked);
return {};
}
if (m_is_revoked)
return vm.throw_completion<TypeError>(global_object, ErrorType::ProxyRevoked);
// 3. Assert: Type(handler) is Object.
// 4. Let target be O.[[ProxyTarget]].
// 5. Let trap be ? GetMethod(handler, "getPrototypeOf").
auto trap = TRY_OR_DISCARD(Value(&m_handler).get_method(global_object, vm.names.getPrototypeOf));
auto trap = TRY(Value(&m_handler).get_method(global_object, vm.names.getPrototypeOf));
// 6. If trap is undefined, then
if (!trap) {
// a. Return ? target.[[GetPrototypeOf]]().
return m_target.internal_get_prototype_of();
return TRY(m_target.internal_get_prototype_of());
}
// 7. Let handlerProto be ? Call(trap, handler, « target »).
auto handler_proto = TRY_OR_DISCARD(vm.call(*trap, &m_handler, &m_target));
auto handler_proto = TRY(vm.call(*trap, &m_handler, &m_target));
// 8. If Type(handlerProto) is neither Object nor Null, throw a TypeError exception.
if (!handler_proto.is_object() && !handler_proto.is_null()) {
vm.throw_exception<TypeError>(global_object, ErrorType::ProxyGetPrototypeOfReturn);
return {};
}
if (!handler_proto.is_object() && !handler_proto.is_null())
return vm.throw_completion<TypeError>(global_object, ErrorType::ProxyGetPrototypeOfReturn);
// 9. Let extensibleTarget be ? IsExtensible(target).
auto extensible_target = m_target.is_extensible();
if (vm.exception())
return {};
if (auto* exception = vm.exception())
return throw_completion(exception->value());
// 10. If extensibleTarget is true, return handlerProto.
if (extensible_target)
return handler_proto.is_null() ? nullptr : &handler_proto.as_object();
// 11. Let targetProto be ? target.[[GetPrototypeOf]]().
auto target_proto = m_target.internal_get_prototype_of();
if (vm.exception())
return {};
auto* target_proto = TRY(m_target.internal_get_prototype_of());
// 12. If SameValue(handlerProto, targetProto) is false, throw a TypeError exception.
if (!same_value(handler_proto, target_proto)) {
vm.throw_exception<TypeError>(global_object, ErrorType::ProxyGetPrototypeOfNonExtensible);
return {};
}
if (!same_value(handler_proto, target_proto))
return vm.throw_completion<TypeError>(global_object, ErrorType::ProxyGetPrototypeOfNonExtensible);
// 13. Return handlerProto.
return handler_proto.is_null() ? nullptr : &handler_proto.as_object();
@ -147,9 +139,7 @@ bool ProxyObject::internal_set_prototype_of(Object* prototype)
return true;
// 12. Let targetProto be ? target.[[GetPrototypeOf]]().
auto* target_proto = m_target.internal_get_prototype_of();
if (vm.exception())
return {};
auto* target_proto = TRY_OR_DISCARD(m_target.internal_get_prototype_of());
// 13. If SameValue(V, targetProto) is false, throw a TypeError exception.
if (!same_value(prototype, target_proto)) {