Re: [boost] Re: in/out parameters, codingstylesandmaintenance

From: Jeremy Maitin-Shepard (jbms_at_[hidden])
Date: 2003-05-04 20:29:09

On Sun, May 04, 2003 at 07:15:59PM -0400, Noel Yap wrote:
> I still don't understand.  What's wrong with:
> 
>   ref< T > f(); // returns a reference to an uncopyable object, f owns
> the returned object
>   T& p = f().get();

Assuming f is a function, rather than a method, the only way for f to
own this returned object is if it is a global variable.  If you intend
that f is returning a dynamically allocated object, when and how will
this memory be deallocated?

> in place of:
> 
>   void f( out< T > p_ );
>   T p;
>   f( out( p ) );

Here, the callee, rather than f, owns the object.  No dynamic
allocation needs to be used.

- Jeremy Maitin-Shepard