[boost] Re: Boost.Test: major update

I've had a need for tracking a class' instances for some time now. I've used:

http://cvs.sourceforge.net/viewcvs.py/boost-sandbox/boost-sandbox/boost/utility/object_tracked.hpp?rev=1.1&view=auto

Could you give two lines rationale for what it is doing and how it's doing it? Gennadiy