| /*============================================================================= |
| 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 |