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+#ifndef BOOST_SERIALIZATION_PFTO_HPP
+#define BOOST_SERIALIZATION_PFTO_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
+// pfto.hpp: workarounds for compilers which have problems supporting
+// Partial Function Template Ordering (PFTO).
+
+// (C) Copyright 2002 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)
+
+//  See http://www.boost.org/libs/serialization for updates, documentation, and revision history.
+// PFTO version is used to specify the last argument of certain functions
+// Function it is used to support  compilers that fail to support correct Partial 
+// Template Ordering
+#include <boost/config.hpp>
+
+// some compilers can use an exta argument and use function overloading
+// to choose desired function.  This extra argument is long in the default
+// function implementation and int for the rest.  The function is called
+// with an int argument.  This first attempts to match functions with an
+// int argument before the default one (with a long argument).  This is
+// known to function with VC 6.0. On other compilers this fails (Borland)
+// or causes other problems (GCC).  note: this 
+
+#if defined(BOOST_NO_FUNCTION_TEMPLATE_ORDERING)
+    #define BOOST_PFTO long
+#else
+    #define BOOST_PFTO
+#endif
+
+// here's another approach.  Rather than use a default function - make sure
+// there is no default at all by requiring that all function invocations
+// have a "wrapped" argument type.  This solves a problem with VC 6.0
+// (and perhaps others) while implementing templated constructors.
+
+namespace boost {
+namespace serialization {
+
+template<class T>
+struct pfto_wrapper {
+    const T & t;
+    operator const T & (){
+        return t;
+    }
+    pfto_wrapper (const T & rhs) : t(rhs) {}
+};
+
+template<class T>
+pfto_wrapper< T > make_pfto_wrapper(const T & t, BOOST_PFTO int){
+    return pfto_wrapper< T >(t);
+}
+
+template<class T>
+pfto_wrapper< T > make_pfto_wrapper(const pfto_wrapper< T > & t, int){
+    return t;
+}
+
+} // namespace serialization
+} // namespace boost
+
+#ifdef BOOST_NO_FUNCTION_TEMPLATE_ORDERING
+    #define BOOST_PFTO_WRAPPER(T) \
+        boost::serialization::pfto_wrapper< T >
+    #define BOOST_MAKE_PFTO_WRAPPER(t) \
+        boost::serialization::make_pfto_wrapper(t, 0)
+#else
+    #define BOOST_PFTO_WRAPPER(T) T
+    #define BOOST_MAKE_PFTO_WRAPPER(t) t
+#endif
+
+#endif // BOOST_SERIALIZATION_PFTO_HPP