113 lines
3.4 KiB
C++
113 lines
3.4 KiB
C++
#ifndef BOOST_SERIALIZATION_BASE_OBJECT_HPP
|
|
#define BOOST_SERIALIZATION_BASE_OBJECT_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
|
|
// base_object.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.
|
|
|
|
// if no archive headers have been included this is a no op
|
|
// this is to permit BOOST_EXPORT etc to be included in a
|
|
// file declaration header
|
|
|
|
#include <boost/config.hpp>
|
|
#include <boost/detail/workaround.hpp>
|
|
|
|
#include <boost/mpl/eval_if.hpp>
|
|
#include <boost/mpl/int.hpp>
|
|
#include <boost/mpl/bool.hpp>
|
|
#include <boost/mpl/identity.hpp>
|
|
|
|
#include <boost/type_traits/is_base_and_derived.hpp>
|
|
#include <boost/type_traits/is_pointer.hpp>
|
|
#include <boost/type_traits/is_const.hpp>
|
|
#include <boost/type_traits/is_polymorphic.hpp>
|
|
|
|
#include <boost/static_assert.hpp>
|
|
#include <boost/serialization/access.hpp>
|
|
#include <boost/serialization/force_include.hpp>
|
|
#include <boost/serialization/void_cast_fwd.hpp>
|
|
|
|
namespace boost {
|
|
namespace serialization {
|
|
|
|
namespace detail
|
|
{
|
|
// get the base type for a given derived type
|
|
// preserving the const-ness
|
|
template<class B, class D>
|
|
struct base_cast
|
|
{
|
|
typedef BOOST_DEDUCED_TYPENAME
|
|
mpl::if_<
|
|
is_const<D>,
|
|
const B,
|
|
B
|
|
>::type type;
|
|
BOOST_STATIC_ASSERT(is_const<type>::value == is_const<D>::value);
|
|
};
|
|
|
|
// only register void casts if the types are polymorphic
|
|
template<class Base, class Derived>
|
|
struct base_register
|
|
{
|
|
struct polymorphic {
|
|
static void const * invoke(){
|
|
Base const * const b = 0;
|
|
Derived const * const d = 0;
|
|
return & void_cast_register(d, b);
|
|
}
|
|
};
|
|
struct non_polymorphic {
|
|
static void const * invoke(){
|
|
return 0;
|
|
}
|
|
};
|
|
static void const * invoke(){
|
|
typedef BOOST_DEDUCED_TYPENAME mpl::eval_if<
|
|
is_polymorphic<Base>,
|
|
mpl::identity<polymorphic>,
|
|
mpl::identity<non_polymorphic>
|
|
>::type type;
|
|
return type::invoke();
|
|
}
|
|
};
|
|
|
|
} // namespace detail
|
|
#if defined(__BORLANDC__) && __BORLANDC__ < 0x610
|
|
template<class Base, class Derived>
|
|
const Base &
|
|
base_object(const Derived & d)
|
|
{
|
|
BOOST_STATIC_ASSERT(! is_pointer<Derived>::value);
|
|
detail::base_register<Base, Derived>::invoke();
|
|
return access::cast_reference<const Base, Derived>(d);
|
|
}
|
|
#else
|
|
template<class Base, class Derived>
|
|
BOOST_DEDUCED_TYPENAME detail::base_cast<Base, Derived>::type &
|
|
base_object(Derived &d)
|
|
{
|
|
BOOST_STATIC_ASSERT(( is_base_and_derived<Base,Derived>::value));
|
|
BOOST_STATIC_ASSERT(! is_pointer<Derived>::value);
|
|
typedef BOOST_DEDUCED_TYPENAME detail::base_cast<Base, Derived>::type type;
|
|
detail::base_register<type, Derived>::invoke();
|
|
return access::cast_reference<type, Derived>(d);
|
|
}
|
|
#endif
|
|
|
|
} // namespace serialization
|
|
} // namespace boost
|
|
|
|
#endif // BOOST_SERIALIZATION_BASE_OBJECT_HPP
|