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- /*=============================================================================
- 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
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