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43 lines
1.2 KiB
43 lines
1.2 KiB
/*============================================================================= |
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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/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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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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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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