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+#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