--- /dev/null
+/*=============================================================================
+ 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/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