[boost] make_shared and allocate_shared for classes with private constructors

Subject: [boost] make_shared and allocate_shared for classes with private constructors
From: Michael Marcin (mike.marcin_at_[hidden])
Date: 2008-10-29 14:22:34

I have some classes that derive from enable_shared_from_this which I've 
given private constructors and static creation methods which return a 
shared_ptr. This prevents someone from using the class inappropriately. 
It seems obvious that at a minimum using make_shared internally here 
would be an improvement. Unfortunately this requires that make_shared be 
  made a friend for every arity and probably won't work with the 
variadic template implementation of make_shared.

Is it possible to make declaring friendship for make_shared and 
allocate_shared simpler? I thinking something like serialization does 
with friend class boost::serialization::access.

Thanks,
-- 
Michael Marcin