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84 lines
3.2 KiB
84 lines
3.2 KiB
3 years ago
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/*=============================================================================
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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_JOINT_VIEW_07162005_0140)
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#define FUSION_JOINT_VIEW_07162005_0140
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#include <boost/fusion/support/config.hpp>
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#include <boost/fusion/view/joint_view/joint_view_fwd.hpp>
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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/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/fusion/view/joint_view/joint_view_iterator.hpp>
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#include <boost/fusion/view/joint_view/detail/begin_impl.hpp>
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#include <boost/fusion/view/joint_view/detail/end_impl.hpp>
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#include <boost/fusion/support/sequence_base.hpp>
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#include <boost/mpl/if.hpp>
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#include <boost/mpl/plus.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 joint_view_tag;
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struct forward_traversal_tag;
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struct fusion_sequence_tag;
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template <typename Sequence1, typename Sequence2>
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struct joint_view : sequence_base<joint_view<Sequence1, Sequence2> >
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{
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typedef joint_view_tag fusion_tag;
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typedef fusion_sequence_tag tag; // this gets picked up by MPL
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typedef typename
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mpl::eval_if<
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mpl::and_<
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traits::is_associative<Sequence1>
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, traits::is_associative<Sequence2>
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>
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, mpl::inherit2<forward_traversal_tag,associative_tag>
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, mpl::identity<forward_traversal_tag>
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>::type
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category;
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typedef mpl::true_ is_view;
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typedef typename result_of::begin<Sequence1>::type first_type;
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typedef typename result_of::end<Sequence1>::type last_type;
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typedef typename result_of::begin<Sequence2>::type concat_type;
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typedef typename result_of::end<Sequence2>::type concat_last_type;
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typedef typename mpl::int_<
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result_of::size<Sequence1>::value + result_of::size<Sequence2>::value>
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size;
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BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
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joint_view(Sequence1& in_seq1, Sequence2& in_seq2)
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: seq1(in_seq1)
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, seq2(in_seq2)
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{}
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BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
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first_type first() const { return fusion::begin(seq1); }
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BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
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concat_type concat() const { return fusion::begin(seq2); }
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BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
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concat_last_type concat_last() const { return fusion::end(seq2); }
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// silence MSVC warning C4512: assignment operator could not be generated
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BOOST_DELETED_FUNCTION(joint_view& operator= (joint_view const&))
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private:
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typename mpl::if_<traits::is_view<Sequence1>, Sequence1, Sequence1&>::type seq1;
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typename mpl::if_<traits::is_view<Sequence2>, Sequence2, Sequence2&>::type seq2;
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};
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}}
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#endif
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