[boost] Re: function_traits

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