| 50 | |
| 51 | template <typename T> |
| 52 | std::enable_if_t<google::protobuf::Arena::is_arena_constructable<T>::value, |
| 53 | google::protobuf::Arena* absl_nullable> |
| 54 | GetArena(const T* absl_nullable ptr) { |
| 55 | return ptr != nullptr ? ptr->GetArena() : nullptr; |
| 56 | } |
| 57 | |
| 58 | template <typename T> |
| 59 | std::enable_if_t<!google::protobuf::Arena::is_arena_constructable<T>::value, |