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(BOOST_FUSION_END_IMPL_09272006_0721)
8 #define BOOST_FUSION_END_IMPL_09272006_0721
9 
10 #include <boost/fusion/support/config.hpp>
11 #include <boost/fusion/adapted/boost_tuple/boost_tuple_iterator.hpp>
12 #include <boost/mpl/if.hpp>
13 #include <boost/type_traits/is_const.hpp>
14 
15 namespace boost { namespace tuples
16 {
17     struct null_type;
18 }}
19 
20 namespace boost { namespace fusion
21 {
22     struct boost_tuple_tag;
23 
24     namespace extension
25     {
26         template <typename Tag>
27         struct end_impl;
28 
29         template <>
30         struct end_impl<boost_tuple_tag>
31         {
size_from_real_kind(int kind)32             template <typename Sequence>
33             struct apply
34             {
35                 typedef
36                     boost_tuple_iterator<
37                         typename mpl::if_<
38                             is_const<Sequence>
39                           , tuples::null_type const
40                           , tuples::null_type
41                         >::type
42                     >
43                 type;
44 
45                 BOOST_FUSION_GPU_ENABLED
46                 static type
47                 call(Sequence& seq)
48                 {
49                     return type(seq);
50                 }
51             };
52         };
53     }
54 }}
55 
56 #endif
57