Function Arena

common/memory.h:134–138

  }

  static Owner Arena(google::protobuf::Arena* absl_nonnull arena
                         ABSL_ATTRIBUTE_LIFETIME_BOUND) noexcept {
    ABSL_DCHECK(arena != nullptr);
    return Owner(reinterpret_cast<uintptr_t>(arena) | kArenaBit);
  }

  static Owner Arena(std::nullptr_t) = delete;