Re: [boost] [Type Traits] Patch for type_with_alignment

From: David Abrahams (david.abrahams_at_[hidden])
Date: 2002-04-04 10:43:13

Ironically, it looks as though I needed to revert to something much
closer to Brian Parker's original implementation for this, due to the
fact that T may be an abstract class in my case (see
http://mail.python.org/pipermail/c++-sig/2002-April/000922.html for
details). I'm not sure it's worth providing this functionality in
type_traits, however, as my application is a corner case: I need to
establish the aligned storage independently from construction of T in
that storage: the code which constructs T would be provided by a
separate dynamically-linked executable, and any compilation errors
should be relegated to the point where that is attempted.

-Dave

----- Original Message -----
From: "Douglas Gregor" <gregod_at_[hidden]>
To: <boost_at_[hidden]>
Sent: Wednesday, April 03, 2002 9:22 AM
Subject: Re: [boost] [Type Traits] Patch for type_with_alignment

> On Wednesday 03 April 2002 08:16 am, you wrote:
> > >On Fri, 29 Mar 2002, David Abrahams wrote:
> > >>Are you planning to apply this patch?
> > >>
> > >>-Dave
> > >
> > >Yes, but I can't right now. I'll apply it tomorrow if it hasn't
already
> > >been done.
> > >
> > > Doug
> >
> > How is the patch coming up (or did I miss some post on this
subject)?
> >
> > I'm also working on something that could use type_with_alignment<>.
>
> type_with_alignment<> is available in CVS. I'm guessing we should also
add
> aligned_storage somewhere, because I'm sure quite a few of us will use
it:
>
> template<int Size, int Align>
> struct aligned_storage
> {
>   union {
>     typename type_with_alignment<Align>::type dummy;
>     char data[Size];
>   };
> };
>
> Maybe this belongs in utility/aligned_storage.hpp?
>
> Doug
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