sl@0: #ifndef BOOST_SERIALIZATION_TRACKING_HPP
sl@0: #define BOOST_SERIALIZATION_TRACKING_HPP
sl@0: 
sl@0: // MS compatible compilers support #pragma once
sl@0: #if defined(_MSC_VER) && (_MSC_VER >= 1020)
sl@0: # pragma once
sl@0: #endif
sl@0: 
sl@0: /////////1/////////2/////////3/////////4/////////5/////////6/////////7/////////8
sl@0: // tracking.hpp:
sl@0: 
sl@0: // (C) Copyright 2002 Robert Ramey - http://www.rrsd.com . 
sl@0: // Use, modification and distribution is subject to the Boost Software
sl@0: // License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
sl@0: // http://www.boost.org/LICENSE_1_0.txt)
sl@0: 
sl@0: //  See http://www.boost.org for updates, documentation, and revision history.
sl@0: 
sl@0: #include <boost/config.hpp>
sl@0: #include <boost/static_assert.hpp>
sl@0: #include <boost/mpl/eval_if.hpp>
sl@0: #include <boost/mpl/identity.hpp>
sl@0: #include <boost/mpl/int.hpp>
sl@0: #include <boost/mpl/equal_to.hpp>
sl@0: #include <boost/mpl/greater.hpp>
sl@0: #include <boost/mpl/integral_c_tag.hpp>
sl@0: 
sl@0: #include <boost/type_traits/is_base_and_derived.hpp>
sl@0: #include <boost/type_traits/is_pointer.hpp>
sl@0: #include <boost/serialization/level.hpp>
sl@0: #include <boost/serialization/tracking_enum.hpp>
sl@0: //#include <boost/serialization/traits.hpp>
sl@0: 
sl@0: namespace boost {
sl@0: namespace serialization {
sl@0: 
sl@0: struct basic_traits;
sl@0: 
sl@0: // default tracking level
sl@0: template<class T>
sl@0: struct tracking_level {
sl@0:     template<class U>
sl@0:     struct traits_class_tracking {
sl@0:         typedef BOOST_DEDUCED_TYPENAME U::tracking type;
sl@0:     };
sl@0:     typedef mpl::integral_c_tag tag;
sl@0:     // note: at least one compiler complained w/o the full qualification
sl@0:     // on basic traits below
sl@0:     typedef
sl@0:         BOOST_DEDUCED_TYPENAME mpl::eval_if<
sl@0:             is_base_and_derived<boost::serialization::basic_traits, T>,
sl@0:             traits_class_tracking<T>,
sl@0:         //else
sl@0:         BOOST_DEDUCED_TYPENAME mpl::eval_if<
sl@0:             is_pointer<T>,
sl@0:             // pointers are not tracked by default
sl@0:             mpl::int_<track_never>,
sl@0:         //else
sl@0:         BOOST_DEDUCED_TYPENAME mpl::eval_if<
sl@0:             // for primitives
sl@0:             BOOST_DEDUCED_TYPENAME mpl::equal_to<
sl@0:                 implementation_level<T>,
sl@0:                 mpl::int_<primitive_type> 
sl@0:             >,
sl@0:             // is never
sl@0:             mpl::int_<track_never>,
sl@0:             // otherwise its selective
sl@0:             mpl::int_<track_selectivly>
sl@0:     >  > >::type type;
sl@0:     BOOST_STATIC_CONSTANT(int, value = tracking_level::type::value);
sl@0: };
sl@0: 
sl@0: 
sl@0: template<class T, enum tracking_type L>
sl@0: inline bool operator>=(tracking_level<T> t, enum tracking_type l)
sl@0: {
sl@0:     return t.value >= (int)l;
sl@0: }
sl@0: 
sl@0: } // namespace serialization
sl@0: } // namespace boost
sl@0: 
sl@0: 
sl@0: // The STATIC_ASSERT is prevents one from setting tracking for a primitive type.  
sl@0: // This almost HAS to be an error.  Doing this will effect serialization of all 
sl@0: // char's in your program which is almost certainly what you don't want to do.  
sl@0: // If you want to track all instances of a given primitive type, You'll have to 
sl@0: // wrap it in your own type so its not a primitive anymore.  Then it will compile
sl@0: // without problem.
sl@0: #define BOOST_CLASS_TRACKING(T, E)           \
sl@0: namespace boost {                            \
sl@0: namespace serialization {                    \
sl@0: template<>                                   \
sl@0: struct tracking_level< T >                   \
sl@0: {                                            \
sl@0:     typedef mpl::integral_c_tag tag;         \
sl@0:     typedef mpl::int_< E> type;              \
sl@0:     BOOST_STATIC_CONSTANT(                   \
sl@0:         int,                                 \
sl@0:         value = tracking_level::type::value  \
sl@0:     );                                       \
sl@0:     /* tracking for a class  */              \
sl@0:     BOOST_STATIC_ASSERT((                    \
sl@0:         mpl::greater<                        \
sl@0:             /* that is a prmitive */         \
sl@0:             implementation_level< T >,       \
sl@0:             mpl::int_<primitive_type>        \
sl@0:         >::value                             \
sl@0:     ));                                      \
sl@0: };                                           \
sl@0: }}
sl@0: 
sl@0: #endif // BOOST_SERIALIZATION_TRACKING_HPP