blob: 32ca5bec557ad9099e2623396cfeca0554568761 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
|
/*=============================================================================
Copyright (c) 2001-2011 Joel de Guzman
Distributed under the Boost Software License, Version 1.0. (See accompanying
file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
==============================================================================*/
#if !defined(BOOST_FUSION_AT_IMPL_09262006_1920)
#define BOOST_FUSION_AT_IMPL_09262006_1920
#include <boost/fusion/support/config.hpp>
#include <boost/tuple/tuple.hpp>
#include <boost/mpl/if.hpp>
namespace boost { namespace fusion
{
struct boost_tuple_tag;
namespace extension
{
template<typename T>
struct at_impl;
template <>
struct at_impl<boost_tuple_tag>
{
template <typename Sequence, typename N>
struct apply
{
typedef typename
tuples::element<N::value, Sequence>::type
element;
typedef typename
mpl::if_<
is_const<Sequence>
, typename tuples::access_traits<element>::const_type
, typename tuples::access_traits<element>::non_const_type
>::type
type;
BOOST_FUSION_GPU_ENABLED
static type
call(Sequence& seq)
{
return tuples::get<N::value>(seq);
}
};
};
}
}}
#endif
|
