Chris@16: /*=============================================================================
Chris@16:     Copyright (c) 2001-2011 Joel de Guzman
Chris@16:     Copyright (c) 2006 Dan Marsden
Chris@16: 
Chris@16:     Distributed under the Boost Software License, Version 1.0. (See accompanying 
Chris@16:     file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
Chris@16: ==============================================================================*/
Chris@16: #if !defined (BOOST_FUSION_PAIR_TIE_20060812_2058)
Chris@16: #define BOOST_FUSION_PAIR_TIE_20060812_2058
Chris@16: 
Chris@101: #include <boost/fusion/support/config.hpp>
Chris@16: #include <boost/type_traits/is_const.hpp>
Chris@16: #include <boost/utility/enable_if.hpp>
Chris@16: 
Chris@16: namespace boost { namespace fusion {
Chris@16: 
Chris@16:     template<typename Key, typename T>
Chris@16:     struct pair;
Chris@16: 
Chris@16:     namespace result_of
Chris@16:     {
Chris@16:         template<typename Key, typename T>
Chris@16:         struct pair_tie
Chris@16:         {
Chris@16:             typedef fusion::pair<Key, T&> type;
Chris@16:         };
Chris@16:     }
Chris@16: 
Chris@16:     template<typename Key, typename T>
Chris@101:     BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
Chris@16:     typename disable_if<is_const<T>, typename result_of::pair_tie<Key, T>::type>::type
Chris@16:     pair_tie(T& t)
Chris@16:     {
Chris@16:         return typename result_of::pair_tie<Key, T>::type(t);
Chris@16:     }
Chris@16: 
Chris@16:     template<typename Key, typename T>
Chris@101:     BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
Chris@16:     typename result_of::pair_tie<Key, T const>::type
Chris@16:     pair_tie(T const& t)
Chris@16:     {
Chris@16:         return typename result_of::pair_tie<Key, T const>::type(t);
Chris@16:     }
Chris@16: }}
Chris@16: 
Chris@16: #endif