| #ifndef BOOST_SERIALIZATION_TRACKING_HPP |
| #define BOOST_SERIALIZATION_TRACKING_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 |
| // tracking.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/static_assert.hpp> |
| #include <boost/mpl/eval_if.hpp> |
| #include <boost/mpl/identity.hpp> |
| #include <boost/mpl/int.hpp> |
| #include <boost/mpl/equal_to.hpp> |
| #include <boost/mpl/greater.hpp> |
| #include <boost/mpl/integral_c_tag.hpp> |
| |
| #include <boost/type_traits/is_base_and_derived.hpp> |
| #include <boost/type_traits/is_pointer.hpp> |
| #include <boost/serialization/level.hpp> |
| #include <boost/serialization/tracking_enum.hpp> |
| #include <boost/serialization/type_info_implementation.hpp> |
| |
| namespace boost { |
| namespace serialization { |
| |
| struct basic_traits; |
| |
| // default tracking level |
| template<class T> |
| struct tracking_level_impl { |
| template<class U> |
| struct traits_class_tracking { |
| typedef BOOST_DEDUCED_TYPENAME U::tracking 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_tracking< T >, |
| //else |
| BOOST_DEDUCED_TYPENAME mpl::eval_if< |
| is_pointer< T >, |
| // pointers are not tracked by default |
| mpl::int_<track_never>, |
| //else |
| BOOST_DEDUCED_TYPENAME mpl::eval_if< |
| // for primitives |
| BOOST_DEDUCED_TYPENAME mpl::equal_to< |
| implementation_level< T >, |
| mpl::int_<primitive_type> |
| >, |
| // is never |
| mpl::int_<track_never>, |
| // otherwise its selective |
| mpl::int_<track_selectively> |
| > > >::type type; |
| BOOST_STATIC_CONSTANT(int, value = type::value); |
| }; |
| |
| template<class T> |
| struct tracking_level : |
| public tracking_level_impl<const T> |
| { |
| }; |
| |
| template<class T, enum tracking_type L> |
| inline bool operator>=(tracking_level< T > t, enum tracking_type l) |
| { |
| return t.value >= (int)l; |
| } |
| |
| } // namespace serialization |
| } // namespace boost |
| |
| |
| // The STATIC_ASSERT is prevents one from setting tracking for a primitive type. |
| // This almost HAS to be an error. Doing this will effect serialization of all |
| // char's in your program which is almost certainly what you don't want to do. |
| // If you want to track all instances of a given primitive type, You'll have to |
| // wrap it in your own type so its not a primitive anymore. Then it will compile |
| // without problem. |
| #define BOOST_CLASS_TRACKING(T, E) \ |
| namespace boost { \ |
| namespace serialization { \ |
| template<> \ |
| struct tracking_level< T > \ |
| { \ |
| typedef mpl::integral_c_tag tag; \ |
| typedef mpl::int_< E> type; \ |
| BOOST_STATIC_CONSTANT( \ |
| int, \ |
| value = tracking_level::type::value \ |
| ); \ |
| /* tracking for a class */ \ |
| BOOST_STATIC_ASSERT(( \ |
| mpl::greater< \ |
| /* that is a prmitive */ \ |
| implementation_level< T >, \ |
| mpl::int_<primitive_type> \ |
| >::value \ |
| )); \ |
| }; \ |
| }} |
| |
| #endif // BOOST_SERIALIZATION_TRACKING_HPP |