Re: [boost] concepts and template template parameters

From: Douglas Gregor (dgregor_at_[hidden])
Date: 2008-03-31 11:16:08

On Mon, 2008-03-31 at 07:50 -0700, Eric Niebler wrote:
> Douglas Gregor wrote:
> > Some metaprogramming is likely to change when using concepts, but
> > we're doing our best not to hurt metaprogramming in the process of
> > adding concepts.
> 
> But as Dave points out, this:
> 
>    std::vector< foo(bar) >
> 
> is not likely to compile in C++0x, even though in C++03 that's fine 
> because we aren't actually instantiating std::vector here. That's bad 
> from Proto's transform DSEL. At least template template parameters offer 
> a back door, but the syntax won't be as sweet.

Yes, I understand.

  - Doug