#ifndef BOOST_SERIALIZATION_LEVEL_HPP

 #define BOOST_SERIALIZATION_LEVEL_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

 // level.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 <boost/config.hpp>

 #include <boost/detail/workaround.hpp>

 #include <boost/type_traits/is_fundamental.hpp>

 #include <boost/type_traits/is_enum.hpp>

 #include <boost/type_traits/is_array.hpp>

 #include <boost/type_traits/is_class.hpp>

 #include <boost/type_traits/is_base_and_derived.hpp>

 #include <boost/mpl/eval_if.hpp>

 #include <boost/mpl/int.hpp>

 #include <boost/mpl/integral_c.hpp>

 #include <boost/mpl/integral_c_tag.hpp>

 #include <boost/mpl/aux_/nttp_decl.hpp>

 #include <boost/serialization/level_enum.hpp>

 namespace boost {

 namespace serialization {

 struct basic_traits;

 // default serialization implementation level

 template<class T>

 struct implementation_level {

     template<class U>

     struct traits_class_level {

         typedef  BOOST_DEDUCED_TYPENAME U::level type;

     };

     typedef mpl::integral_c_tag tag;

     // note: at least one compiler complained w/o the full qualification

     // on basic traits below

     typedef

         BOOST_DEDUCED_TYPENAME mpl::eval_if<

             is_base_and_derived<boost::serialization::basic_traits, T>,

             traits_class_level<T>,

         //else

         BOOST_DEDUCED_TYPENAME mpl::eval_if<

             is_fundamental<T>,

             mpl::int_<primitive_type>,

         //else

         BOOST_DEDUCED_TYPENAME mpl::eval_if<

             is_class<T>,

             mpl::int_<object_class_info>,

         //else

         BOOST_DEDUCED_TYPENAME mpl::eval_if<

             is_array<T>,

             #if BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x560))

                 mpl::int_<not_serializable>,

             #else

                 mpl::int_<object_serializable>,

             #endif

         //else

         BOOST_DEDUCED_TYPENAME mpl::eval_if<

             is_enum<T>,

             //#if BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x560))

             //    mpl::int_<not_serializable>,

             //#else

                 mpl::int_<primitive_type>,

             //#endif

         //else

             mpl::int_<not_serializable>

         >

         >

         >

         >

         >::type type;

         // vc 7.1 doesn't like enums here

     BOOST_STATIC_CONSTANT(int, value = implementation_level::type::value);

 };

 template<class T, BOOST_MPL_AUX_NTTP_DECL(int, L) >

 inline bool operator>=(implementation_level<T> t, enum level_type l)

 {

     return t.value >= (int)l;

 }

 } // namespace serialization

 } // namespace boost

 // specify the level of serialization implementation for the class

 // require that class info saved when versioning is used

 #define BOOST_CLASS_IMPLEMENTATION(T, E)                 \

     namespace boost {                                    \

     namespace serialization {                            \

     template <>                                          \

     struct implementation_level< T >                     \

     {                                                    \

         typedef mpl::integral_c_tag tag;                 \

         typedef mpl::int_< E > type;                     \

         BOOST_STATIC_CONSTANT(                           \

             int,                                         \

             value = implementation_level::type::value    \

         );                                               \

     };                                                   \

     }                                                    \

     }

     /**/

 #endif // BOOST_SERIALIZATION_LEVEL_HPP