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+#ifndef BOOST_SERIALIZATION_VOID_CAST_FWD_HPP
+#define BOOST_SERIALIZATION_VOID_CAST_FWD_HPP
+
+// MS compatible compilers support #pragma once
+#if defined(_MSC_VER) && (_MSC_VER >= 1020)
+# pragma once
+#endif
+
+/////////1/////////2/////////3/////////4/////////5/////////6/////////7/////////8
+// void_cast_fwd.hpp: interface for run-time casting of void pointers.
+
+// (C) Copyright 2005 Robert Ramey - http://www.rrsd.com .
+// Use, modification and distribution is subject to 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)
+// gennadiy.rozental@tfn.com
+
+// See http://www.boost.org for updates, documentation, and revision history.
+
+#include <cstddef> // NULL
+#include <boost/serialization/force_include.hpp>
+
+namespace boost {
+namespace serialization {
+namespace void_cast_detail{
+class void_caster;
+} // namespace void_cast_detail
+template<class Derived, class Base>
+BOOST_DLLEXPORT
+inline const void_cast_detail::void_caster & void_cast_register(
+ const Derived * dnull = NULL,
+ const Base * bnull = NULL
+) BOOST_USED;
+} // namespace serialization
+} // namespace boost
+
+#endif // BOOST_SERIALIZATION_VOID_CAST_HPP