#ifndef BOOST_SERIALIZATION_VERSION_HPP | |
#define BOOST_SERIALIZATION_VERSION_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 | |
// version.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/mpl/assert.hpp> | |
#include <boost/mpl/int.hpp> | |
#include <boost/mpl/eval_if.hpp> | |
#include <boost/mpl/identity.hpp> | |
#include <boost/mpl/integral_c_tag.hpp> | |
#include <boost/type_traits/is_base_and_derived.hpp> | |
namespace boost { | |
namespace serialization { | |
struct basic_traits; | |
// default version number is 0. Override with higher version | |
// when class definition changes. | |
template<class T> | |
struct version | |
{ | |
template<class U> | |
struct traits_class_version { | |
typedef BOOST_DEDUCED_TYPENAME U::version 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_version< T >, | |
mpl::int_<0> | |
>::type type; | |
BOOST_STATIC_CONSTANT(int, value = version::type::value); | |
}; | |
} // namespace serialization | |
} // namespace boost | |
/* note: at first it seemed that this would be a good place to trap | |
* as an error an attempt to set a version # for a class which doesn't | |
* save its class information (including version #) in the archive. | |
* However, this imposes a requirement that the version be set after | |
* the implemention level which would be pretty confusing. If this | |
* is to be done, do this check in the input or output operators when | |
* ALL the serialization traits are available. Included the implementation | |
* here with this comment as a reminder not to do this! | |
*/ | |
//#include <boost/serialization/level.hpp> | |
//#include <boost/mpl/equal_to.hpp> | |
#include <boost/mpl/less.hpp> | |
#include <boost/mpl/comparison.hpp> | |
// specify the current version number for the class | |
// version numbers limited to 8 bits !!! | |
#define BOOST_CLASS_VERSION(T, N) \ | |
namespace boost { \ | |
namespace serialization { \ | |
template<> \ | |
struct version<T > \ | |
{ \ | |
typedef mpl::int_<N> type; \ | |
typedef mpl::integral_c_tag tag; \ | |
BOOST_STATIC_CONSTANT(int, value = version::type::value); \ | |
BOOST_MPL_ASSERT(( \ | |
boost::mpl::less< \ | |
boost::mpl::int_<N>, \ | |
boost::mpl::int_<256> \ | |
> \ | |
)); \ | |
/* \ | |
BOOST_MPL_ASSERT(( \ | |
mpl::equal_to< \ | |
:implementation_level<T >, \ | |
mpl::int_<object_class_info> \ | |
>::value \ | |
)); \ | |
*/ \ | |
}; \ | |
} \ | |
} | |
#endif // BOOST_SERIALIZATION_VERSION_HPP |