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// (C) Copyright Daniel Frey and Robert Ramey 2009.
// Use, modification and distribution are 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/libs/type_traits for most recent version including documentation.
#ifndef BOOST_TT_IS_VIRTUAL_BASE_OF_HPP_INCLUDED
#define BOOST_TT_IS_VIRTUAL_BASE_OF_HPP_INCLUDED
#include <boost/type_traits/is_base_of.hpp>
#include <boost/type_traits/is_same.hpp>
#include <boost/mpl/and.hpp>
#include <boost/mpl/not.hpp>
// should be the last #include
#include <boost/type_traits/detail/bool_trait_def.hpp>
namespace boost {
namespace detail {
#ifdef BOOST_MSVC
#pragma warning( push )
#pragma warning( disable : 4584 )
#elif defined __GNUC__
#pragma GCC system_header
#endif
template<typename Base, typename Derived, typename tag>
struct is_virtual_base_of_impl
{
BOOST_STATIC_CONSTANT(bool, value = false);
};
template<typename Base, typename Derived>
struct is_virtual_base_of_impl<Base, Derived, mpl::true_>
{
#ifdef __BORLANDC__
struct boost_type_traits_internal_struct_X : public virtual Derived, public virtual Base
{
boost_type_traits_internal_struct_X();
boost_type_traits_internal_struct_X(const boost_type_traits_internal_struct_X&);
boost_type_traits_internal_struct_X& operator=(const boost_type_traits_internal_struct_X&);
~boost_type_traits_internal_struct_X()throw();
};
struct boost_type_traits_internal_struct_Y : public virtual Derived
{
boost_type_traits_internal_struct_Y();
boost_type_traits_internal_struct_Y(const boost_type_traits_internal_struct_Y&);
boost_type_traits_internal_struct_Y& operator=(const boost_type_traits_internal_struct_Y&);
~boost_type_traits_internal_struct_Y()throw();
};
#else
struct boost_type_traits_internal_struct_X : Derived, virtual Base
{
boost_type_traits_internal_struct_X();
boost_type_traits_internal_struct_X(const boost_type_traits_internal_struct_X&);
boost_type_traits_internal_struct_X& operator=(const boost_type_traits_internal_struct_X&);
~boost_type_traits_internal_struct_X()throw();
};
struct boost_type_traits_internal_struct_Y : Derived
{
boost_type_traits_internal_struct_Y();
boost_type_traits_internal_struct_Y(const boost_type_traits_internal_struct_Y&);
boost_type_traits_internal_struct_Y& operator=(const boost_type_traits_internal_struct_Y&);
~boost_type_traits_internal_struct_Y()throw();
};
#endif
BOOST_STATIC_CONSTANT(bool, value = (sizeof(boost_type_traits_internal_struct_X)==sizeof(boost_type_traits_internal_struct_Y)));
};
template<typename Base, typename Derived>
struct is_virtual_base_of_impl2
{
typedef typename mpl::and_<is_base_of<Base, Derived>, mpl::not_<is_same<Base, Derived> > >::type tag_type;
typedef is_virtual_base_of_impl<Base, Derived, tag_type> imp;
BOOST_STATIC_CONSTANT(bool, value = imp::value);
};
#ifdef BOOST_MSVC
#pragma warning( pop )
#endif
} // namespace detail
BOOST_TT_AUX_BOOL_TRAIT_DEF2(
is_virtual_base_of
, Base
, Derived
, (::boost::detail::is_virtual_base_of_impl2<Base,Derived>::value)
)
#ifndef BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION
BOOST_TT_AUX_BOOL_TRAIT_PARTIAL_SPEC2_2(typename Base,typename Derived,is_virtual_base_of,Base&,Derived,false)
BOOST_TT_AUX_BOOL_TRAIT_PARTIAL_SPEC2_2(typename Base,typename Derived,is_virtual_base_of,Base,Derived&,false)
BOOST_TT_AUX_BOOL_TRAIT_PARTIAL_SPEC2_2(typename Base,typename Derived,is_virtual_base_of,Base&,Derived&,false)
#endif
} // namespace boost
#include <boost/type_traits/detail/bool_trait_undef.hpp>
#endif
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