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45 lines
1.3 KiB
45 lines
1.3 KiB
/*============================================================================= |
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Copyright (c) 2009 Christopher Schmidt |
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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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#ifndef BOOST_FUSION_CONTAINER_MAP_DETAIL_DEREF_IMPL_HPP |
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#define BOOST_FUSION_CONTAINER_MAP_DETAIL_DEREF_IMPL_HPP |
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#include <boost/fusion/sequence/intrinsic/at.hpp> |
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#include <boost/type_traits/is_const.hpp> |
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namespace boost { namespace fusion { namespace extension |
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{ |
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template <typename> |
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struct deref_impl; |
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template <> |
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struct deref_impl<map_iterator_tag> |
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{ |
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template <typename It> |
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struct apply |
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{ |
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typedef typename |
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result_of::at< |
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typename mpl::if_< |
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is_const<typename It::seq_type> |
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, typename It::seq_type::storage_type const |
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, typename It::seq_type::storage_type |
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>::type |
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, typename It::index |
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>::type |
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type; |
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static type |
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call(It const& it) |
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{ |
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return fusion::at<typename It::index>(it.seq->get_data()); |
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} |
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}; |
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}; |
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}}} |
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#endif
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