1 /*=============================================================================
2     Copyright (c) 2011 Eric Niebler
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(BOOST_FUSION_SEGMENTED_END_IMPL_HPP_INCLUDED)
8 #define BOOST_FUSION_SEGMENTED_END_IMPL_HPP_INCLUDED
9 
10 #include <boost/fusion/support/config.hpp>
11 #include <boost/mpl/assert.hpp>
12 #include <boost/type_traits/add_const.hpp>
13 #include <boost/type_traits/remove_reference.hpp>
14 #include <boost/fusion/sequence/intrinsic_fwd.hpp>
15 #include <boost/fusion/container/list/cons_fwd.hpp>
16 #include <boost/fusion/support/is_segmented.hpp>
17 
18 namespace boost { namespace fusion
19 {
20     template <typename First, typename Last>
21     struct iterator_range;
22 }}
23 
24 namespace boost { namespace fusion { namespace detail
25 {
26     //auto segmented_end_impl( seq, stack )
27     //{
28     //    assert(is_segmented(seq));
29     //    auto it = end(segments(seq));
30     //    return cons(iterator_range(it, it), stack);
31     //}
32 
33     template <typename Sequence, typename Stack>
34     struct segmented_end_impl
35     {
36         BOOST_MPL_ASSERT((traits::is_segmented<Sequence>));
37 
38         typedef
39             typename result_of::end<
40                 typename remove_reference<
41                     typename add_const<
42                         typename result_of::segments<Sequence>::type
43                     >::type
44                 >::type
45             >::type
46         end_type;
47 
48         typedef iterator_range<end_type, end_type>  pair_type;
49         typedef cons<pair_type, Stack>              type;
50 
51         BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
make_pairboost::fusion::detail::segmented_end_impl52         static pair_type make_pair(end_type end)
53         {
54             return pair_type(end, end);
55         }
56 
57         BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
callboost::fusion::detail::segmented_end_impl58         static type call(Sequence & seq, Stack stack)
59         {
60             return type(
61                 make_pair(fusion::end(fusion::segments(seq))),
62                 stack);
63         }
64     };
65 
66 }}}
67 
68 #endif
69