[RFC] A bit of rationale about C++0x shared_ptr vs allocators

[Paolo Carlini]

Humm, replying to myself, sorry...

> Is it possible to have a bit of rationale?

Now I think I see it. It's because we want eventually to call non-const members, like allocate/deallocate. We are not seeing the issue so clearly in our implementation because of a rebind that we have in our hierarchy... Still, I'm puzzled that the specifications cannot be otherwise...

Paolo.