Am Thursday 17 September 2009 14:58:23 schrieb Peter Dimov:
The signature of sp_enable_shared_from_this has changed, it now takes a pointer to a shared_ptr as its first argument. Look at the current shared_ptr constructor:
template<class Y> explicit shared_ptr( Y * p ): px( p ), pn( p ) // Y must be complete { boost::detail::sp_enable_shared_from_this( this, p, p ); }
Relying on implementation details has its maintenance costs. :-)
I wondered before why shared_count is an implementation detail. there are obviously use cases besides shared_ptr for this. one of those use cases is even endorsed by boost, by offering intrusive_ptr. and the implementation of shared_count has performance advantages over every portable solution possible, as its implemented compiler- and platform-specific for many combinations. so, why's shared_count an implementation detail?