[Boost-users] serialization library - reloading objects

Hello, All! Are there any way to load existing objects by base class pointer without creating new? Examination of input archives source code does not give me any idea how I can achieve it. I think I need some mechanism for runtime switching archive object tracking behaviour in that way so all objects will interpreted as already created (or per-object tracking registration without actual object loading to pre-register pointer to object as already created before object loading). With best regards, Sergey.