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_BEGIN_IMPL_09242011_1744)
8 #define BOOST_FUSION_BEGIN_IMPL_09242011_1744
9 
10 #include <boost/fusion/support/config.hpp>
11 #include <boost/fusion/adapted/std_tuple/std_tuple_iterator.hpp>
12 
13 namespace boost { namespace fusion
14 {
15     struct std_tuple_tag;
16 
17     namespace extension
18     {
19         template<typename T>
20         struct begin_impl;
21 
22         template <>
23         struct begin_impl<std_tuple_tag>
24         {
25             template <typename Sequence>
26             struct apply
27             {
28                 typedef std_tuple_iterator<Sequence, 0> type;
29 
30                 BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
31                 static type
callboost::fusion::extension::begin_impl::apply32                 call(Sequence& v)
33                 {
34                     return type(v);
35                 }
36             };
37         };
38     }
39 }}
40 
41 #endif
42