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78 lines
3.0 KiB
78 lines
3.0 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_JOINT_VIEW_07162005_0140) |
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#define FUSION_JOINT_VIEW_07162005_0140 |
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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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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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first_type first() const { return fusion::begin(seq1); } |
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concat_type concat() const { return fusion::begin(seq2); } |
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concat_last_type concat_last() const { return fusion::end(seq2); } |
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private: |
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// silence MSVC warning C4512: assignment operator could not be generated |
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joint_view& operator= (joint_view const&); |
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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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