add boost on mac

macx64/include/boost/metaparse/v1/get_message.hpp

@@ -0,0 +1,29 @@
+#ifndef BOOST_METAPARSE_V1_GET_MESSAGE_HPP
+#define BOOST_METAPARSE_V1_GET_MESSAGE_HPP
+
+//    Copyright Abel Sinkovics (abel@sinkovics.hu) 2014.
+// 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)
+
+#include <boost/metaparse/v1/fwd/get_message.hpp>
+
+namespace boost
+{
+  namespace metaparse
+  {
+    namespace v1
+    {
+      template <class>
+      struct get_message_impl;
+
+      template <class T>
+      struct get_message : get_message_impl<typename T::type::tag>::template apply<typename T::type>
+      {};
+
+    }
+  }
+}
+
+#endif
+