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