[boost] Re: Re: Re: smarter auto_ptr

From: Rani Sharoni (rani_sharoni_at_[hidden])
Date: 2004-01-20 13:25:23

Bronek Kozicki wrote:
> Peter Dimov <pdimov_at_[hidden]> wrote:
>>     sink( pi ); // error, possibly unintended transfer
>>     sink( move(pi) ); // OK, Howard's preferred
>>     sink( pi.move() ); // I kind of like it better but it's not
>
> I just came to this idea before reading your post :>
> Small changes to move_ptr implementation will make it work:
>     move_ptr move()
>         {return move_ptr(*this);}
>
>     template <class U>
>     friend move_ptr<U> move(move_ptr<U>& p)
>         {return p;}

The template part is not necessary due to ADL but you should make such
function available via ordinary lookup (i.e. boost::move) so you are back to
template.

How about the following non-intrusive yet sufficient implementation:

template <class U>
move_ptr<U> move(move_ptr<U>& p)
{ return 1 ? p : move_ptr<U>(); }

It actually works but I'm just kidding because not all compilers agree on
that.

Rani