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1 | /*============================================================================= |
2 | Copyright (c) 2001-2011 Joel de Guzman | |
3 | Copyright (c) 2006 Dan Marsden | |
4 | ||
5 | Distributed under the Boost Software License, Version 1.0. (See accompanying | |
6 | file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) | |
7 | ==============================================================================*/ | |
8 | #if !defined (BOOST_FUSION_PAIR_TIE_20060812_2058) | |
9 | #define BOOST_FUSION_PAIR_TIE_20060812_2058 | |
10 | ||
11 | #include <boost/fusion/support/config.hpp> | |
12 | #include <boost/type_traits/is_const.hpp> | |
13 | #include <boost/utility/enable_if.hpp> | |
14 | ||
15 | namespace boost { namespace fusion { | |
16 | ||
17 | template<typename Key, typename T> | |
18 | struct pair; | |
19 | ||
20 | namespace result_of | |
21 | { | |
22 | template<typename Key, typename T> | |
23 | struct pair_tie | |
24 | { | |
25 | typedef fusion::pair<Key, T&> type; | |
26 | }; | |
27 | } | |
28 | ||
29 | template<typename Key, typename T> | |
30 | BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED | |
31 | typename disable_if<is_const<T>, typename result_of::pair_tie<Key, T>::type>::type | |
32 | pair_tie(T& t) | |
33 | { | |
34 | return typename result_of::pair_tie<Key, T>::type(t); | |
35 | } | |
36 | ||
37 | template<typename Key, typename T> | |
38 | BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED | |
39 | typename result_of::pair_tie<Key, T const>::type | |
40 | pair_tie(T const& t) | |
41 | { | |
42 | return typename result_of::pair_tie<Key, T const>::type(t); | |
43 | } | |
44 | }} | |
45 | ||
46 | #endif |