| /*============================================================================= |
| Copyright (c) 2001-2006 Joel de Guzman |
| Copyright (c) 2006 Dan Marsden |
| |
| 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_PAIR_TIE_20060812_2058) |
| #define BOOST_FUSION_PAIR_TIE_20060812_2058 |
| |
| #include <boost/type_traits/is_const.hpp> |
| #include <boost/utility/enable_if.hpp> |
| |
| namespace boost { namespace fusion { |
| |
| template<typename Key, typename T> |
| struct pair; |
| |
| namespace result_of |
| { |
| template<typename Key, typename T> |
| struct pair_tie |
| { |
| typedef fusion::pair<Key, T&> type; |
| }; |
| } |
| |
| template<typename Key, typename T> |
| typename disable_if<is_const<T>, typename result_of::pair_tie<Key, T>::type>::type |
| pair_tie(T& t) |
| { |
| return typename result_of::pair_tie<Key, T>::type(t); |
| } |
| |
| template<typename Key, typename T> |
| typename result_of::pair_tie<Key, T const>::type |
| pair_tie(T const& t) |
| { |
| return typename result_of::pair_tie<Key, T const>::type(t); |
| } |
| }} |
| |
| #endif |