algorithm/query/count_if.hpp

0001 /*=============================================================================
0002     Copyright (c) 2001-2011 Joel de Guzman
0003     Copyright (c) 2007 Dan Marsden
0004
0005     Distributed under the Boost Software License, Version 1.0. (See accompanying
0006     file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
0007 ==============================================================================*/
0008 #if !defined(BOOST_FUSION_COUNT_IF_09162005_0137)
0009 #define BOOST_FUSION_COUNT_IF_09162005_0137
0010
0011 #include <boost/fusion/support/config.hpp>
0012 #include <boost/fusion/algorithm/query/detail/count_if.hpp>
0013 #include <boost/fusion/support/category_of.hpp>
0014 #include <boost/fusion/support/is_sequence.hpp>
0015 #include <boost/utility/enable_if.hpp>
0016
0017 namespace boost { namespace fusion
0018 {
0019     namespace result_of
0020     {
0021         template <typename Sequence, typename F>
0022         struct count_if
0023         {
0024             typedef int type;
0025         };
0026     }
0027
0028     template <typename Sequence, typename F>
0029     BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
0030     inline typename
0031         enable_if<
0032             traits::is_sequence<Sequence>
0033           , int
0034         >::type
0035     count_if(Sequence const& seq, F f)
0036     {
0037         return detail::count_if(
0038             seq, f, typename traits::category_of<Sequence>::type());
0039     }
0040 }}
0041
0042 #endif
0043