[boost] function_traits

From: Joel de Guzman (joel_at_[hidden])
Date: 2005-02-08 09:20:26

Hi,

I find the interface:

     function_traits<F>::arity
     function_traits<F>::result_type
     function_traits<F>::argN_type

(especially the last) awkward in TMP code.

In the interest of not having metafunction blobs, I'd suggest
the interface:

     function_arity<F>::value
     function_result<F>::type
     function_arg_c<N, F>::type
     function_arg<mpl::int_<N>, F>::type

In particular, I need the function_arg(_c) metafunctions.
It is very awkward to get the Nth function argument, given a
constant N.

Thoughts?

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