Of course. That's just map<obj*>. The pointer-to-pointers could move but the pointers are now staying put. But now you have a bit of a lifetime worry. Map<shar

Of course. That's just map<obj*>. The pointer-to-pointers could move but the pointers are now staying put. But now you have a bit of a lifetime worry. Map<shared_ptr<obj>> with weak_ptr probably is the best general solution. If the object decided to delete itself the weakptr will be set to null.