Re: [boost] [mpl] mpl::is_sequence problem

From: Joel de Guzman (joel_at_[hidden])
Date: 2006-01-08 21:58:29

Hi,

I hope this post did not go unnoticed. Thanks!

Joel de Guzman wrote:
> Hi,
> 
> A few months ago, I had a problem with mpl::is_sequence. It seems
> that the problem is not yet fixed. Anyway, to simplify, here's
> the code that exhibits the problem:
> 
>      #include <boost/mpl/is_sequence.hpp>
> 
>      int
>      main()
>      {
>          bool r = boost::mpl::is_sequence<boost::mpl::int_<0> >::value;
>          return 0;
>      }
> 
> The code does not compile on all compilers that I use regularly
> (VC++, g++ and Comeau). Here's a another code that does not compile:
> 
>      #include <boost/mpl/is_sequence.hpp>
> 
>      struct x
>      {
>          typedef int tag;
>      };
> 
>      int
>      main()
>      {
>          bool r = boost::mpl::is_sequence<x>::value;
>          return 0;
>      }
> 
> Is there any chance for this to be fixed in the immediate future?
> I rely on mpl::is_sequence for constrained genericity and concept
> checking in fusion.
> 
> Regards,

-- 
Joel de Guzman
http://www.boost-consulting.com
http://spirit.sf.net