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diff --git a/boost/archive/polymorphic_iarchive.hpp b/boost/archive/polymorphic_iarchive.hpp
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+#ifndef BOOST_ARCHIVE_POLYMORPHIC_IARCHIVE_HPP
+#define BOOST_ARCHIVE_POLYMORPHIC_IARCHIVE_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
+// polymorphic_iarchive.hpp
+
+// (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 for updates, documentation, and revision history.
+
+#include <cstddef> // std::size_t
+#include <climits> // ULONG_MAX 
+#include <string>
+
+#include <boost/config.hpp>
+#if defined(BOOST_NO_STDC_NAMESPACE)
+namespace std{
+    using ::size_t;
+} // namespace std
+#endif
+
+#include <boost/cstdint.hpp>
+
+#include <boost/serialization/pfto.hpp>
+#include <boost/archive/detail/iserializer.hpp>
+#include <boost/archive/detail/interface_iarchive.hpp>
+#include <boost/serialization/nvp.hpp>
+#include <boost/archive/detail/register_archive.hpp>
+
+#include <boost/archive/detail/decl.hpp>
+#include <boost/archive/detail/abi_prefix.hpp> // must be the last header
+
+namespace boost {
+template<class T>
+class shared_ptr;
+namespace serialization {
+    class extended_type_info;
+} // namespace serialization
+namespace archive {
+namespace detail {
+    class BOOST_ARCHIVE_DECL(BOOST_PP_EMPTY()) basic_iarchive;
+    class BOOST_ARCHIVE_DECL(BOOST_PP_EMPTY()) basic_iarchive;
+}
+
+class polymorphic_iarchive;
+
+class polymorphic_iarchive_impl :
+    public detail::interface_iarchive<polymorphic_iarchive>
+{
+#ifdef BOOST_NO_MEMBER_TEMPLATE_FRIENDS
+public:
+#else
+    friend class detail::interface_iarchive<polymorphic_iarchive>;
+    friend class load_access;
+#endif
+    // primitive types the only ones permitted by polymorphic archives
+    virtual void load(bool & t) = 0;
+
+    virtual void load(char & t) = 0;
+    virtual void load(signed char & t) = 0;
+    virtual void load(unsigned char & t) = 0;
+    #ifndef BOOST_NO_CWCHAR
+    #ifndef BOOST_NO_INTRINSIC_WCHAR_T
+    virtual void load(wchar_t & t) = 0;
+    #endif
+    #endif
+    virtual void load(short & t) = 0;
+    virtual void load(unsigned short & t) = 0;
+    virtual void load(int & t) = 0;
+    virtual void load(unsigned int & t) = 0;
+    virtual void load(long & t) = 0;
+    virtual void load(unsigned long & t) = 0;
+
+    #if defined(BOOST_HAS_LONG_LONG)
+    virtual void load(boost::long_long_type & t) = 0;
+    virtual void load(boost::ulong_long_type & t) = 0;
+    #elif defined(BOOST_HAS_MS_INT64)
+    virtual void load(__int64 & t) = 0;
+    virtual void load(unsigned __int64 & t) = 0;
+    #endif
+
+    virtual void load(float & t) = 0;
+    virtual void load(double & t) = 0;
+
+    // string types are treated as primitives
+    virtual void load(std::string & t) = 0;
+    #ifndef BOOST_NO_STD_WSTRING
+    virtual void load(std::wstring & t) = 0;
+    #endif
+
+    // used for xml and other tagged formats
+    virtual void load_start(const char * name) = 0;
+    virtual void load_end(const char * name) = 0;
+    virtual void register_basic_serializer(const detail::basic_iserializer & bis) = 0;
+
+    // msvc and borland won't automatically pass these to the base class so
+    // make it explicit here
+    template<class T>
+    void load_override(T & t, BOOST_PFTO int)
+    {
+        archive::load(* this->This(), t);
+    }
+    // special treatment for name-value pairs.
+    template<class T>
+    void load_override(
+        #ifndef BOOST_NO_FUNCTION_TEMPLATE_ORDERING
+        const
+        #endif
+        boost::serialization::nvp< T > & t,
+        int
+    ){
+        load_start(t.name());
+        archive::load(* this->This(), t.value());
+        load_end(t.name());
+    }
+protected:
+    virtual ~polymorphic_iarchive_impl(){};
+public:
+    // utility function implemented by all legal archives
+    virtual void set_library_version(library_version_type archive_library_version) = 0;
+    virtual library_version_type get_library_version() const = 0;
+    virtual unsigned int get_flags() const = 0;
+    virtual void delete_created_pointers() = 0;
+    virtual void reset_object_address(
+        const void * new_address,
+        const void * old_address
+    ) = 0;
+
+    virtual void load_binary(void * t, std::size_t size) = 0;
+
+    // these are used by the serialization library implementation.
+    virtual void load_object(
+        void *t,
+        const detail::basic_iserializer & bis
+    ) = 0;
+    virtual const detail::basic_pointer_iserializer * load_pointer(
+        void * & t,
+        const detail::basic_pointer_iserializer * bpis_ptr,
+        const detail::basic_pointer_iserializer * (*finder)(
+            const boost::serialization::extended_type_info & type
+        )
+    ) = 0;
+};
+
+} // namespace archive
+} // namespace boost
+
+#include <boost/archive/detail/abi_suffix.hpp> // pops abi_suffix.hpp pragmas
+
+// note special treatment of shared_ptr. This type needs a special
+// structure associated with every archive.  We created a "mix-in"
+// class to provide this functionality.  Since shared_ptr holds a
+// special esteem in the boost library - we included it here by default.
+#include <boost/archive/shared_ptr_helper.hpp>
+
+namespace boost { 
+namespace archive {
+
+class polymorphic_iarchive : 
+    public polymorphic_iarchive_impl,
+    public detail::shared_ptr_helper
+{
+public:
+    virtual ~polymorphic_iarchive(){};
+};
+
+} // namespace archive
+} // namespace boost
+
+// required by export
+BOOST_SERIALIZATION_REGISTER_ARCHIVE(boost::archive::polymorphic_iarchive)
+
+#endif // BOOST_ARCHIVE_POLYMORPHIC_IARCHIVE_HPP