Re: [boost] Re: A couple of issues in submitting typelists to boost

From: Daniel Frey (daniel.frey_at_[hidden])
Date: 2001-11-26 09:33:07

David Abrahams wrote:
> 
> ----- Original Message -----
> From: "Vesa Karvonen" <vesa.karvonen_at_[hidden]>
> To: <boost_at_[hidden]>
> Sent: Monday, November 26, 2001 4:38 AM
> Subject: Re: [boost] Re: A couple of issues in submitting typelists to boost
> 
> > From: "David Abrahams" <david.abrahams_at_[hidden]>
> > [...]
> > > Ah, OK; now I see the logic. We really need compile-time infix
> operators,
> > > don't we? ;-)
> > >
> > > <X is_derived_from Y>::value
> >
> > Try this:
> >
> >     Is<X>::Derived_From<Y>::value
> >
> > -Vesa
> 
> I thought of that, but shied away because of this:
> 
>    ...
>     static const bool inheritance =
>         Is<X>::template Derived_From<Y>::value
>                ^^^^^^^^

How about:

  test< D, is_derived_by< B > >::value

(The names are not important, the pattern is)

Regards, Daniel

--
Daniel Frey
aixigo AG - financial training, research and technology
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