williamr@2: #ifndef BOOST_SERIALIZATION_LEVEL_HPP
williamr@2: #define BOOST_SERIALIZATION_LEVEL_HPP
williamr@2: 
williamr@2: // MS compatible compilers support #pragma once
williamr@2: #if defined(_MSC_VER) && (_MSC_VER >= 1020)
williamr@2: # pragma once
williamr@2: #endif
williamr@2: 
williamr@2: /////////1/////////2/////////3/////////4/////////5/////////6/////////7/////////8
williamr@2: // level.hpp:
williamr@2: 
williamr@2: // (C) Copyright 2002 Robert Ramey - http://www.rrsd.com . 
williamr@2: // Use, modification and distribution is subject to the Boost Software
williamr@2: // License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
williamr@2: // http://www.boost.org/LICENSE_1_0.txt)
williamr@2: 
williamr@2: //  See http://www.boost.org for updates, documentation, and revision history.
williamr@2: 
williamr@2: #include <boost/config.hpp>
williamr@2: #include <boost/detail/workaround.hpp>
williamr@2: 
williamr@2: #include <boost/type_traits/is_fundamental.hpp>
williamr@2: #include <boost/type_traits/is_enum.hpp>
williamr@2: #include <boost/type_traits/is_array.hpp>
williamr@2: #include <boost/type_traits/is_class.hpp>
williamr@2: #include <boost/type_traits/is_base_and_derived.hpp>
williamr@2: 
williamr@2: #include <boost/mpl/eval_if.hpp>
williamr@2: #include <boost/mpl/int.hpp>
williamr@2: #include <boost/mpl/integral_c.hpp>
williamr@2: #include <boost/mpl/integral_c_tag.hpp>
williamr@2: #include <boost/mpl/aux_/nttp_decl.hpp>
williamr@2: 
williamr@2: #include <boost/serialization/level_enum.hpp>
williamr@2: 
williamr@2: namespace boost {
williamr@2: namespace serialization {
williamr@2: 
williamr@2: struct basic_traits;
williamr@2: 
williamr@2: // default serialization implementation level
williamr@2: template<class T>
williamr@2: struct implementation_level {
williamr@2:     template<class U>
williamr@2:     struct traits_class_level {
williamr@2:         typedef  BOOST_DEDUCED_TYPENAME U::level type;
williamr@2:     };
williamr@2: 
williamr@2:     typedef mpl::integral_c_tag tag;
williamr@2:     // note: at least one compiler complained w/o the full qualification
williamr@2:     // on basic traits below
williamr@2:     typedef
williamr@2:         BOOST_DEDUCED_TYPENAME mpl::eval_if<
williamr@2:             is_base_and_derived<boost::serialization::basic_traits, T>,
williamr@2:             traits_class_level<T>,
williamr@2:         //else
williamr@2:         BOOST_DEDUCED_TYPENAME mpl::eval_if<
williamr@2:             is_fundamental<T>,
williamr@2:             mpl::int_<primitive_type>,
williamr@2:         //else
williamr@2:         BOOST_DEDUCED_TYPENAME mpl::eval_if<
williamr@2:             is_class<T>,
williamr@2:             mpl::int_<object_class_info>,
williamr@2:         //else
williamr@2:         BOOST_DEDUCED_TYPENAME mpl::eval_if<
williamr@2:             is_array<T>,
williamr@2:             #if BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x560))
williamr@2:                 mpl::int_<not_serializable>,
williamr@2:             #else
williamr@2:                 mpl::int_<object_serializable>,
williamr@2:             #endif
williamr@2:         //else
williamr@2:         BOOST_DEDUCED_TYPENAME mpl::eval_if<
williamr@2:             is_enum<T>,
williamr@2:             //#if BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x560))
williamr@2:             //    mpl::int_<not_serializable>,
williamr@2:             //#else
williamr@2:                 mpl::int_<primitive_type>,
williamr@2:             //#endif
williamr@2:         //else
williamr@2:             mpl::int_<not_serializable>
williamr@2:         >
williamr@2:         >
williamr@2:         >
williamr@2:         >
williamr@2:         >::type type;
williamr@2:         // vc 7.1 doesn't like enums here
williamr@2:     BOOST_STATIC_CONSTANT(int, value = implementation_level::type::value);
williamr@2: };
williamr@2: 
williamr@2: 
williamr@2: template<class T, BOOST_MPL_AUX_NTTP_DECL(int, L) >
williamr@2: inline bool operator>=(implementation_level<T> t, enum level_type l)
williamr@2: {
williamr@2:     return t.value >= (int)l;
williamr@2: }
williamr@2: 
williamr@2: } // namespace serialization
williamr@2: } // namespace boost
williamr@2: 
williamr@2: // specify the level of serialization implementation for the class
williamr@2: // require that class info saved when versioning is used
williamr@2: #define BOOST_CLASS_IMPLEMENTATION(T, E)                 \
williamr@2:     namespace boost {                                    \
williamr@2:     namespace serialization {                            \
williamr@2:     template <>                                          \
williamr@2:     struct implementation_level< T >                     \
williamr@2:     {                                                    \
williamr@2:         typedef mpl::integral_c_tag tag;                 \
williamr@2:         typedef mpl::int_< E > type;                     \
williamr@2:         BOOST_STATIC_CONSTANT(                           \
williamr@2:             int,                                         \
williamr@2:             value = implementation_level::type::value    \
williamr@2:         );                                               \
williamr@2:     };                                                   \
williamr@2:     }                                                    \
williamr@2:     }
williamr@2:     /**/
williamr@2: 
williamr@2: #endif // BOOST_SERIALIZATION_LEVEL_HPP