// (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 4250) | |
#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 |