Chris@16: /*=============================================================================
Chris@16:     Copyright (c) 2001-2011 Joel de Guzman
Chris@16: 
Chris@16:     Distributed under the Boost Software License, Version 1.0. (See accompanying 
Chris@16:     file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
Chris@16: ==============================================================================*/
Chris@16: #if !defined(FUSION_REVERSE_VIEW_07202005_0836)
Chris@16: #define FUSION_REVERSE_VIEW_07202005_0836
Chris@16: 
Chris@101: #include <boost/fusion/support/config.hpp>
Chris@16: #include <boost/fusion/support/detail/access.hpp>
Chris@16: #include <boost/fusion/support/is_view.hpp>
Chris@16: #include <boost/fusion/support/category_of.hpp>
Chris@16: #include <boost/fusion/view/reverse_view/reverse_view_iterator.hpp>
Chris@16: #include <boost/fusion/view/reverse_view/detail/begin_impl.hpp>
Chris@16: #include <boost/fusion/view/reverse_view/detail/end_impl.hpp>
Chris@16: #include <boost/fusion/view/reverse_view/detail/at_impl.hpp>
Chris@16: #include <boost/fusion/view/reverse_view/detail/value_at_impl.hpp>
Chris@16: #include <boost/fusion/support/sequence_base.hpp>
Chris@16: #include <boost/fusion/sequence/intrinsic/begin.hpp>
Chris@16: #include <boost/fusion/sequence/intrinsic/end.hpp>
Chris@16: #include <boost/fusion/sequence/intrinsic/size.hpp>
Chris@16: #include <boost/type_traits/is_base_of.hpp>
Chris@16: #include <boost/static_assert.hpp>
Chris@16: #include <boost/mpl/bool.hpp>
Chris@16: #include <boost/mpl/eval_if.hpp>
Chris@16: #include <boost/mpl/inherit.hpp>
Chris@16: #include <boost/mpl/identity.hpp>
Chris@16: 
Chris@16: namespace boost { namespace fusion
Chris@16: {
Chris@16:     struct reverse_view_tag;
Chris@16:     struct fusion_sequence_tag;
Chris@16: 
Chris@16:     template <typename Sequence>
Chris@16:     struct reverse_view : sequence_base<reverse_view<Sequence> >
Chris@16:     {
Chris@16:         typedef reverse_view_tag fusion_tag;
Chris@16:         typedef fusion_sequence_tag tag; // this gets picked up by MPL
Chris@16:         typedef mpl::true_ is_view;
Chris@16: 
Chris@16:         typedef Sequence seq_type;
Chris@16:         typedef typename traits::category_of<Sequence>::type category;
Chris@16:         typedef typename result_of::begin<Sequence>::type first_type;
Chris@16:         typedef typename result_of::end<Sequence>::type last_type;
Chris@16:         typedef typename result_of::size<Sequence>::type size;
Chris@16: 
Chris@16:         BOOST_STATIC_ASSERT((
Chris@16:             is_base_of<
Chris@16:                 bidirectional_traversal_tag
Chris@16:               , typename traits::category_of<first_type>::type>::value));
Chris@16: 
Chris@101:         BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
Chris@16:         reverse_view(Sequence& in_seq)
Chris@16:             : seq(in_seq)
Chris@16:         {}
Chris@16: 
Chris@101:         BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
Chris@16:         first_type first() const { return fusion::begin(seq); }
Chris@101:         BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
Chris@16:         last_type last() const { return fusion::end(seq); }
Chris@16:         typename mpl::if_<traits::is_view<Sequence>, Sequence, Sequence&>::type seq;
Chris@16: 
Chris@16:     private:
Chris@16:         // silence MSVC warning C4512: assignment operator could not be generated
Chris@16:         reverse_view& operator= (reverse_view const&);
Chris@16:     };
Chris@16: }}
Chris@16: 
Chris@16: #endif
Chris@16: 
Chris@16: