add boost on mac

macx64/include/boost/fusion/adapted/adt/detail/extension.hpp

@@ -0,0 +1,41 @@
+/*=============================================================================
+    Copyright (c) 2001-2009 Joel de Guzman
+    Copyright (c) 2005-2006 Dan Marsden
+    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_ADT_DETAIL_EXTENSION_HPP
+#define BOOST_FUSION_ADAPTED_ADT_DETAIL_EXTENSION_HPP
+
+#include <boost/fusion/support/config.hpp>
+#include <boost/type_traits/remove_const.hpp>
+#include <boost/type_traits/remove_reference.hpp>
+#include <boost/fusion/support/as_const.hpp>
+#include <boost/fusion/adapted/struct/detail/extension.hpp>
+
+namespace boost { namespace fusion
+{
+    namespace detail
+    {
+        template <typename T, typename Dummy>
+        struct get_identity
+          : remove_const<typename remove_reference<T>::type>
+        {};
+    }
+
+    namespace extension
+    {
+        // Overload as_const() to unwrap adt_attribute_proxy.
+        template <typename T, int N, bool Const>
+        BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
+        typename adt_attribute_proxy<T, N, Const>::type as_const(const adt_attribute_proxy<T, N, Const>& proxy)
+        {
+            return proxy.get();
+        }
+    }
+}}
+
+#endif