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diff --git a/boost/fusion/adapted/std_array/detail/value_at_impl.hpp b/boost/fusion/adapted/std_array/detail/value_at_impl.hpp
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+/*=============================================================================
+ Copyright (c) 2001-2011 Joel de Guzman
+ Copyright (c) 2005-2006 Dan Marsden
+
+ 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_STD_ARRAY_VALUE_AT_IMPL_01062013_1700)
+#define BOOST_FUSION_STD_ARRAY_VALUE_AT_IMPL_01062013_1700
+
+namespace boost { namespace fusion {
+
+ struct std_array_tag;
+
+ namespace extension
+ {
+ template<typename T>
+ struct value_at_impl;
+
+ template <>
+ struct value_at_impl<std_array_tag>
+ {
+ template <typename Sequence, typename N>
+ struct apply
+ {
+ typedef typename Sequence::value_type type;
+ };
+ };
+ }
+}}
+
+#endif