[boost] base_from_member suggestions

From: Joe Gottman (jgottman_at_[hidden])
Date: 2004-11-09 19:42:34

   I used base_from_member today for the first time.  It got me out of a 
sticky situation, but I think it could use a few modifications.  Since it is 
designed to be used as a base class but does not have any virtual functions, 
the copy constructor, assignment operator, and destructor should all be 
protected.

Joe Gottman