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57 lines
1.7 KiB
57 lines
1.7 KiB
/*============================================================================= |
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Copyright (c) 2001-2011 Joel de Guzman |
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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(FUSION_VALUE_OF_05052005_1126) |
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#define FUSION_VALUE_OF_05052005_1126 |
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#include <boost/fusion/support/iterator_base.hpp> |
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#include <boost/fusion/support/tag_of.hpp> |
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namespace boost { namespace fusion |
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{ |
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// Special tags: |
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struct iterator_facade_tag; // iterator facade tag |
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struct boost_array_iterator_tag; // boost::array iterator tag |
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struct mpl_iterator_tag; // mpl sequence iterator tag |
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struct std_pair_iterator_tag; // std::pair iterator tag |
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namespace extension |
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{ |
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template <typename Tag> |
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struct value_of_impl |
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{ |
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template <typename Iterator> |
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struct apply {}; |
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}; |
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template <> |
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struct value_of_impl<iterator_facade_tag> |
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{ |
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template <typename Iterator> |
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struct apply : Iterator::template value_of<Iterator> {}; |
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}; |
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template <> |
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struct value_of_impl<boost_array_iterator_tag>; |
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template <> |
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struct value_of_impl<mpl_iterator_tag>; |
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template <> |
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struct value_of_impl<std_pair_iterator_tag>; |
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} |
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namespace result_of |
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{ |
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template <typename Iterator> |
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struct value_of |
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: extension::value_of_impl<typename detail::tag_of<Iterator>::type>:: |
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template apply<Iterator> |
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{}; |
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} |
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}} |
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#endif
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