[boost] Re: move_ptr

From: David Abrahams (dave_at_[hidden])
Date: 2004-01-27 12:39:58

"Jonathan Turkanis" <technews_at_[hidden]> writes:

> If pointers to objects and pointers to arrays need different
> treatment, one can use:
>
>     template<class X> void f(S_ptr<X> px);
>     template<class X> void f(S_ptr<X[]> px);
>
> If one only wants to support pointers to objects, but forgets that the
> array case is subsumed by
>
>    template<class X> void f(S_ptr<X> px);
>
> I think there will almost certianly be a compiler error if somepone
> tries to pass an array pointer, since the dereferencing operations are
> not supported. 

Seriously?  Why not?  It seems as though dereferencing should be
fine.  And incidentally, upcasting should be fine, too:

       S_ptr<D[]> -> S_ptr<B>

;-)

-- 
Dave Abrahams
Boost Consulting
www.boost-consulting.com