Re: [boost] [smart_ptr] enable_shared_from_this::shared_from_this( this);

From: Peter Dimov (pdimov_at_[hidden])
Date: 2008-04-16 17:22:11

Daniel Frey:
...
>    template< typename U >
>    shared_ptr<U> shared_from_this( U* u );

This would even allow you to drop the template parameter of esft_light. 
Interesting.

Getting back to your proposed changes, I unfortunately can't think of a 
mutually satisfactory way to integrate them. I don't like

    shared_ptr( shared_count & pn, Y* px );

because it moves from the lvalue pn, auto_ptr style. The proper interface 
wouldn't do that; it would copy from lvalues and move from rvalues by 
default, while still providing an explicit way to move from lvalues.

On the other hand, the safe C++03 approximation of the proper interface is 
inefficient, and I don't want to introduce move semantics emulation just for 
that semi-internal constructor.