forked from boostorg/fusion
2114bfca6c
Note 1: Forwarding functions are specified as a C++14 constexpr since std::forward is not a constexpr within C++11. Note 2: Though I'm not sure why it doesn't compile, some declarations are specified as a C++14 constexpr or non-constexpr. Note 3: Boost.Tuple adaptation and TR1-based tuple implementations are not constexpr.
47 lines
1.4 KiB
C++
47 lines
1.4 KiB
C++
/*=============================================================================
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Copyright (c) 2001-2011 Joel de Guzman
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Copyright (c) 2006 Dan Marsden
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Distributed under the Boost Software License, Version 1.0. (See accompanying
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file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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==============================================================================*/
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#if !defined (BOOST_FUSION_PAIR_TIE_20060812_2058)
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#define BOOST_FUSION_PAIR_TIE_20060812_2058
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#include <boost/fusion/support/config.hpp>
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#include <boost/type_traits/is_const.hpp>
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#include <boost/utility/enable_if.hpp>
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namespace boost { namespace fusion {
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template<typename Key, typename T>
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struct pair;
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namespace result_of
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{
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template<typename Key, typename T>
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struct pair_tie
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{
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typedef fusion::pair<Key, T&> type;
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};
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}
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template<typename Key, typename T>
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BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
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typename disable_if<is_const<T>, typename result_of::pair_tie<Key, T>::type>::type
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pair_tie(T& t)
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{
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return typename result_of::pair_tie<Key, T>::type(t);
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}
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template<typename Key, typename T>
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BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
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typename result_of::pair_tie<Key, T const>::type
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pair_tie(T const& t)
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{
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return typename result_of::pair_tie<Key, T const>::type(t);
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}
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}}
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#endif
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