[boost] Re: function_traits

From: Jonathan Turkanis (technews_at_[hidden])
Date: 2005-02-08 14:09:25

Joel de Guzman wrote:
> 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.

Tobias Swinger is working on an updated version of function traits.

The interface is documented here (but my implementation is naive):

http://www.kangaroologic.com/function_traits/

Jonathan