int main()
{
    SafeReference<Room> room_ref1;
    printf("&room_ref1 = %p\n", &room_ref1);
    printf("\troom_ref1 valid: %d\n", room_ref1.IsValid());

    {
        printf("\nEntering sub-scope\n");

        Room room;
        printf("&room = %p\n", &room);

#ifdef DBG_SAFE_REF
        room.DumpReferences();
#endif

        room_ref1 = room.GetReference();
        printf("\troom_ref1 valid: %d\n", room_ref1.IsValid());
        if (room_ref1.IsValid()) printf("\tRef points to %p\n", room_ref1.GetObject());
#ifdef DBG_SAFE_REF
        room.DumpReferences();
#endif

        printf("\nAdding 2nd room ref\n");
        SafeReference<Room> room_ref2 = room.GetReference();
        printf("&room_ref2 = %p\n", &room_ref2);
        printf("\troom_ref2 valid: %d\n", room_ref1.IsValid());
#ifdef DBG_SAFE_REF
        room.DumpReferences();
#endif

        printf("\nMoving references\n");
        room_ref1 = std::move(room_ref2);

        printf("\nLeaving sub-scope\n");
    }

    printf("\troom_ref1 valid: %d\n", room_ref1.IsValid());
    return 0;
}