[Boost-users] does ptr_* solves this?

1 Apr 2006

      Hi,

I have an heterogeneous container holding pointers to objects of type B. I 
want to insert objects of type D1,D2,... that derive from B, and I want to do 
that using a custom stl like allocator, for example:

B* obj = my_alloc<D>::allocate(1);
obj = new (obj) B();
container.insert(obj);

My problem is that when an object is removed from the container, I have to 
explicitely deallocate it from my allocator, but the static info was lost, so 
I cannot do 

my_alloc<?>::deallocate(1,oj);

I've asked in boost irc channel, and someone told me ptr_* boost libraries 
solve this problem, is this correct?

thanks
-- 
Marco Correia <mvc@netcabo.pt>