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