add boost on mac

macx64/include/boost/fusion/adapted/array/value_at_impl.hpp

@@ -0,0 +1,29 @@
+/*=============================================================================
+    Copyright (c) 2010 Christopher Schmidt
+
+    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)
+==============================================================================*/
+
+#ifndef BOOST_FUSION_ADAPTED_ARRAY_VALUE_AT_IMPL_HPP
+#define BOOST_FUSION_ADAPTED_ARRAY_VALUE_AT_IMPL_HPP
+
+#include <boost/fusion/support/config.hpp>
+#include <boost/type_traits/remove_extent.hpp>
+
+namespace boost { namespace fusion { namespace extension
+{
+    template<typename>
+    struct value_at_impl;
+
+    template <>
+    struct value_at_impl<po_array_tag>
+    {
+        template <typename Seq, typename N>
+        struct apply
+          : remove_extent<Seq>
+        {};
+    };
+}}}
+
+#endif