/*============================================================================= Copyright (c) 2001-2011 Joel de Guzman Distributed under the Boost Software License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) ==============================================================================*/ #if !defined(FUSION_SIZE_05052005_0214) #define FUSION_SIZE_05052005_0214 #include <boost/fusion/support/config.hpp> #include <boost/utility/enable_if.hpp> #include <boost/mpl/if.hpp> #include <boost/mpl/int.hpp> #include <boost/fusion/sequence/intrinsic_fwd.hpp> #include <boost/fusion/support/tag_of.hpp> #include <boost/fusion/support/is_segmented.hpp> #include <boost/fusion/sequence/intrinsic/detail/segmented_size.hpp> namespace boost { namespace fusion { // Special tags: struct sequence_facade_tag; struct boost_tuple_tag; // boost::tuples::tuple tag struct boost_array_tag; // boost::array tag struct mpl_sequence_tag; // mpl sequence tag struct std_pair_tag; // std::pair tag namespace extension { template <typename Tag> struct size_impl { template<typename Sequence> struct unsegmented_size : Sequence::size {}; template <typename Sequence> struct apply : mpl::if_< traits::is_segmented<Sequence> , detail::segmented_size<Sequence> , unsegmented_size<Sequence> >::type {}; }; template <> struct size_impl<sequence_facade_tag> { template <typename Sequence> struct apply : Sequence::template size<Sequence> {}; }; template <> struct size_impl<boost_tuple_tag>; template <> struct size_impl<boost_array_tag>; template <> struct size_impl<mpl_sequence_tag>; template <> struct size_impl<std_pair_tag>; } namespace result_of { template <typename Sequence> struct size : mpl::int_< extension::size_impl<typename detail::tag_of<Sequence>::type> ::template apply<Sequence>::type::value > {}; } template <typename Sequence> BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED inline typename result_of::size<Sequence>::type size(Sequence const&) { typedef typename result_of::size<Sequence>::type result; return result(); } }} #endif