Re: Finalizing a class

From: rogeeff (rogeeff_at_[hidden])
Date: 2002-02-14 04:42:13

--- In boost_at_y..., Daniel Frey <daniel.frey_at_a...> wrote:
> Mark Rodgers wrote:
> > 
> > From: "Daniel Frey" <daniel.frey_at_a...>
> > 
> > >   template< typename T > class finalize
> > >   {
> > >      friend T;
> > >      finalize() {}
> > >   };
> > 
> > This has been suggested many times in the past but unfortunately
> > the standard gets in the way.  See 7.1.5.3p2:
> > 
> >    "If the identifier resolves to a typedef-name or a template
> >    type-parameter, the elaborated-type-specifier is ill-formed.
> >    [Note: this implies that, within a class template with a
> >    template type-parameter T, the declaration
> > 
> >           friend class T;
> > 
> >    is ill-formed. ]"
> 
> I do not have the standard, but I always thought that 'friend T;' is
> legal while 'friend class T;' isn't. Are you saying that they are 
both
> illegal? Can someone please confirm this? If yes: Is there any 
(legal)
> way to make a template parameter a friend?

Sadly, No. Find previos thread on class properties and see detailed 
explanations.

[...]

> Daniel Frey
> 
> aixigo AG - financial training, research and technology
> Schloß-Rahe-Straße 15, 52072 Aachen, Germany
> fon: [phone], fax: [phone]
> eMail: daniel.frey_at_a..., web: http://www.aixigo.de

Gennadiy.