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68 lines
2.6 KiB
68 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_REVERSE_VIEW_07202005_0836) |
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#define FUSION_REVERSE_VIEW_07202005_0836 |
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#include <boost/fusion/support/detail/access.hpp> |
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#include <boost/fusion/support/is_view.hpp> |
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#include <boost/fusion/support/category_of.hpp> |
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#include <boost/fusion/view/reverse_view/reverse_view_iterator.hpp> |
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#include <boost/fusion/view/reverse_view/detail/begin_impl.hpp> |
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#include <boost/fusion/view/reverse_view/detail/end_impl.hpp> |
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#include <boost/fusion/view/reverse_view/detail/at_impl.hpp> |
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#include <boost/fusion/view/reverse_view/detail/value_at_impl.hpp> |
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#include <boost/fusion/support/sequence_base.hpp> |
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#include <boost/fusion/sequence/intrinsic/begin.hpp> |
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#include <boost/fusion/sequence/intrinsic/end.hpp> |
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#include <boost/fusion/sequence/intrinsic/size.hpp> |
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#include <boost/type_traits/is_base_of.hpp> |
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#include <boost/static_assert.hpp> |
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#include <boost/mpl/bool.hpp> |
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#include <boost/mpl/eval_if.hpp> |
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#include <boost/mpl/inherit.hpp> |
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#include <boost/mpl/identity.hpp> |
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namespace boost { namespace fusion |
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{ |
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struct reverse_view_tag; |
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struct fusion_sequence_tag; |
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template <typename Sequence> |
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struct reverse_view : sequence_base<reverse_view<Sequence> > |
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{ |
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typedef reverse_view_tag fusion_tag; |
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typedef fusion_sequence_tag tag; // this gets picked up by MPL |
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typedef mpl::true_ is_view; |
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typedef Sequence seq_type; |
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typedef typename traits::category_of<Sequence>::type category; |
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typedef typename result_of::begin<Sequence>::type first_type; |
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typedef typename result_of::end<Sequence>::type last_type; |
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typedef typename result_of::size<Sequence>::type size; |
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BOOST_STATIC_ASSERT(( |
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is_base_of< |
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bidirectional_traversal_tag |
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, typename traits::category_of<first_type>::type>::value)); |
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reverse_view(Sequence& in_seq) |
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: seq(in_seq) |
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{} |
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first_type first() const { return fusion::begin(seq); } |
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last_type last() const { return fusion::end(seq); } |
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typename mpl::if_<traits::is_view<Sequence>, Sequence, Sequence&>::type seq; |
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private: |
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// silence MSVC warning C4512: assignment operator could not be generated |
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reverse_view& operator= (reverse_view const&); |
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}; |
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}} |
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#endif |
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