--- /dev/null
+/*=============================================================================
+ Copyright (c) 2007 Tobias Schwinger
+
+ 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(BOOST_FUSION_ITERATOR_RANGE_AT_IMPL_HPP_INCLUDED)
+#define BOOST_FUSION_ITERATOR_RANGE_AT_IMPL_HPP_INCLUDED
+
+#include <boost/fusion/iterator/advance.hpp>
+#include <boost/fusion/iterator/deref.hpp>
+
+namespace boost { namespace fusion
+{
+ struct iterator_range_tag;
+
+ namespace extension
+ {
+ template <typename Tag>
+ struct at_impl;
+
+ template <>
+ struct at_impl<iterator_range_tag>
+ {
+ template <typename Seq, typename N>
+ struct apply
+ {
+ typedef typename Seq::begin_type begin_type;
+ typedef typename result_of::advance<begin_type,N>::type pos;
+ typedef typename result_of::deref<pos>::type type;
+
+ static type
+ call(Seq& s)
+ {
+ return * fusion::advance<N>(s.first);
+ }
+ };
+ };
+ }
+}}
+
+#endif
+