/*============================================================================= Copyright (c) 2001-2011 Joel de Guzman Distributed under the Boost Software License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) ==============================================================================*/ #if !defined(FUSION_VALUE_OF_05052005_1126) #define FUSION_VALUE_OF_05052005_1126 #include <boost/fusion/support/config.hpp> #include <boost/fusion/support/iterator_base.hpp> #include <boost/fusion/support/tag_of.hpp> namespace boost { namespace fusion { // Special tags: struct iterator_facade_tag; // iterator facade tag struct boost_array_iterator_tag; // boost::array iterator tag struct mpl_iterator_tag; // mpl sequence iterator tag struct std_pair_iterator_tag; // std::pair iterator tag namespace extension { template <typename Tag> struct value_of_impl { template <typename Iterator> struct apply {}; }; template <> struct value_of_impl<iterator_facade_tag> { template <typename Iterator> struct apply : Iterator::template value_of<Iterator> {}; }; template <> struct value_of_impl<boost_array_iterator_tag>; template <> struct value_of_impl<mpl_iterator_tag>; template <> struct value_of_impl<std_pair_iterator_tag>; } namespace result_of { template <typename Iterator> struct value_of : extension::value_of_impl<typename detail::tag_of<Iterator>::type>:: template apply<Iterator> {}; } }} #endif