Re: [Boost-users] [Fusion]fusion::traits::is_sequence<->mpl::is_sequence?

-----Original Message----- From: boost-users-bounces@lists.boost.org on behalf of Sohail Somani Sent: Sat 1/20/2007 8:48 AM To: boost-users@lists.boost.org; boost-users@lists.boost.org Subject: Re: [Boost-users] [Fusion]fusion::traits::is_sequence<->mpl::is_sequence? -----Original Message----- From: boost-users-bounces@lists.boost.org on behalf of Joel de Guzman That supports my quick theories. For Sohail, who's doing a non-intrusive adaptation, he'll need to specialize the mpl::sequence_tag. ------ I think I'll stick with fusion::result_of for now ;) ------ I take that back! I do need some of the mpl algorithms. Anyway, while it may not seem that much (I'm a total metaprogramming noob), my progress is below. I can safely say that there haven't been too many frustrations, which surprises me. If I had the mpl book (/me shakes fist @ chapters.ca), I probably would have gotten through it faster. Now what I need is to use max_element on the argument position of all the placeholders and we're done! template void count_placeholders(BindExpression) { typedef typename boost::bind_arg_sequence<BindExpression>::type bind_arg_sequence; typedef typename result_of::filter_if < bind_arg_sequence , boost::is_placeholdermpl::_1 >::type placeholders; BOOST_STATIC_ASSERT(( result_of::size<placeholders>::value == NumPlaceholders)); } void fn_0(){} void fn_1(int){} void fn_2(int,int){} MPL_TEST_CASE() { count_placeholders<0>(boost::bind(&fn_0)); count_placeholders<2>(boost::bind(&fn_2,_1,_2)); }