1/*=============================================================================
2 Copyright (c) 2001-2011 Joel de Guzman
3
4 Distributed under the Boost Software License, Version 1.0. (See accompanying
5 file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
6==============================================================================*/
7#if !defined(FUSION_JOINT_VIEW_07162005_0140)
8#define FUSION_JOINT_VIEW_07162005_0140
9
10#include <boost/fusion/support/config.hpp>
11#include <boost/fusion/view/joint_view/joint_view_fwd.hpp>
12#include <boost/fusion/support/detail/access.hpp>
13#include <boost/fusion/support/is_view.hpp>
14#include <boost/fusion/sequence/intrinsic/begin.hpp>
15#include <boost/fusion/sequence/intrinsic/end.hpp>
16#include <boost/fusion/sequence/intrinsic/size.hpp>
17#include <boost/fusion/view/joint_view/joint_view_iterator.hpp>
18#include <boost/fusion/view/joint_view/detail/begin_impl.hpp>
19#include <boost/fusion/view/joint_view/detail/end_impl.hpp>
20#include <boost/fusion/support/sequence_base.hpp>
21#include <boost/mpl/if.hpp>
22#include <boost/mpl/plus.hpp>
23#include <boost/mpl/bool.hpp>
24#include <boost/mpl/eval_if.hpp>
25#include <boost/mpl/inherit.hpp>
26#include <boost/mpl/identity.hpp>
27
28namespace boost { namespace fusion
29{
30 struct joint_view_tag;
31 struct forward_traversal_tag;
32 struct fusion_sequence_tag;
33
34 template <typename Sequence1, typename Sequence2>
35 struct joint_view : sequence_base<joint_view<Sequence1, Sequence2> >
36 {
37 typedef joint_view_tag fusion_tag;
38 typedef fusion_sequence_tag tag; // this gets picked up by MPL
39 typedef typename
40 mpl::eval_if<
41 mpl::and_<
42 traits::is_associative<Sequence1>
43 , traits::is_associative<Sequence2>
44 >
45 , mpl::inherit2<forward_traversal_tag,associative_tag>
46 , mpl::identity<forward_traversal_tag>
47 >::type
48 category;
49 typedef mpl::true_ is_view;
50
51 typedef typename result_of::begin<Sequence1>::type first_type;
52 typedef typename result_of::end<Sequence1>::type last_type;
53 typedef typename result_of::begin<Sequence2>::type concat_type;
54 typedef typename result_of::end<Sequence2>::type concat_last_type;
55 typedef typename mpl::int_<
56 result_of::size<Sequence1>::value + result_of::size<Sequence2>::value>
57 size;
58
59 BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
60 joint_view(Sequence1& in_seq1, Sequence2& in_seq2)
61 : seq1(in_seq1)
62 , seq2(in_seq2)
63 {}
64
65 BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
66 first_type first() const { return fusion::begin(seq1); }
67 BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
68 concat_type concat() const { return fusion::begin(seq2); }
69 BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
70 concat_last_type concat_last() const { return fusion::end(seq2); }
71
72 // silence MSVC warning C4512: assignment operator could not be generated
73 BOOST_DELETED_FUNCTION(joint_view& operator= (joint_view const&))
74
75 private:
76 typename mpl::if_<traits::is_view<Sequence1>, Sequence1, Sequence1&>::type seq1;
77 typename mpl::if_<traits::is_view<Sequence2>, Sequence2, Sequence2&>::type seq2;
78 };
79}}
80
81#endif
82
83
84

source code of include/boost/fusion/view/joint_view/joint_view.hpp