105 lines
3.7 KiB
C++
105 lines
3.7 KiB
C++
// (C) Copyright Daniel Frey and Robert Ramey 2009.
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// Use, modification and distribution are subject to the Boost Software License,
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// 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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//
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// See http://www.boost.org/libs/type_traits for most recent version including documentation.
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#ifndef BOOST_TT_IS_VIRTUAL_BASE_OF_HPP_INCLUDED
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#define BOOST_TT_IS_VIRTUAL_BASE_OF_HPP_INCLUDED
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#include <boost/type_traits/is_base_of.hpp>
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#include <boost/type_traits/is_same.hpp>
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#include <boost/mpl/and.hpp>
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#include <boost/mpl/not.hpp>
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// should be the last #include
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#include <boost/type_traits/detail/bool_trait_def.hpp>
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namespace boost {
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namespace detail {
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#ifdef BOOST_MSVC
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#pragma warning( push )
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#pragma warning( disable : 4584 4250)
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#elif defined(__GNUC__) && (__GNUC__ >= 4)
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#pragma GCC system_header
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#endif
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template<typename Base, typename Derived, typename tag>
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struct is_virtual_base_of_impl
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{
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BOOST_STATIC_CONSTANT(bool, value = false);
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};
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template<typename Base, typename Derived>
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struct is_virtual_base_of_impl<Base, Derived, mpl::true_>
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{
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#ifdef __BORLANDC__
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struct boost_type_traits_internal_struct_X : public virtual Derived, public virtual Base
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{
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boost_type_traits_internal_struct_X();
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boost_type_traits_internal_struct_X(const boost_type_traits_internal_struct_X&);
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boost_type_traits_internal_struct_X& operator=(const boost_type_traits_internal_struct_X&);
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~boost_type_traits_internal_struct_X()throw();
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};
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struct boost_type_traits_internal_struct_Y : public virtual Derived
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{
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boost_type_traits_internal_struct_Y();
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boost_type_traits_internal_struct_Y(const boost_type_traits_internal_struct_Y&);
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boost_type_traits_internal_struct_Y& operator=(const boost_type_traits_internal_struct_Y&);
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~boost_type_traits_internal_struct_Y()throw();
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};
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#else
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struct boost_type_traits_internal_struct_X : public Derived, virtual Base
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{
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boost_type_traits_internal_struct_X();
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boost_type_traits_internal_struct_X(const boost_type_traits_internal_struct_X&);
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boost_type_traits_internal_struct_X& operator=(const boost_type_traits_internal_struct_X&);
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~boost_type_traits_internal_struct_X()throw();
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};
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struct boost_type_traits_internal_struct_Y : public Derived
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{
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boost_type_traits_internal_struct_Y();
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boost_type_traits_internal_struct_Y(const boost_type_traits_internal_struct_Y&);
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boost_type_traits_internal_struct_Y& operator=(const boost_type_traits_internal_struct_Y&);
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~boost_type_traits_internal_struct_Y()throw();
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};
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#endif
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BOOST_STATIC_CONSTANT(bool, value = (sizeof(boost_type_traits_internal_struct_X)==sizeof(boost_type_traits_internal_struct_Y)));
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};
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template<typename Base, typename Derived>
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struct is_virtual_base_of_impl2
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{
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typedef typename mpl::and_<is_base_of<Base, Derived>, mpl::not_<is_same<Base, Derived> > >::type tag_type;
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typedef is_virtual_base_of_impl<Base, Derived, tag_type> imp;
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BOOST_STATIC_CONSTANT(bool, value = imp::value);
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};
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#ifdef BOOST_MSVC
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#pragma warning( pop )
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#endif
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} // namespace detail
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BOOST_TT_AUX_BOOL_TRAIT_DEF2(
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is_virtual_base_of
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, Base
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, Derived
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, (::boost::detail::is_virtual_base_of_impl2<Base,Derived>::value)
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)
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#ifndef BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION
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BOOST_TT_AUX_BOOL_TRAIT_PARTIAL_SPEC2_2(typename Base,typename Derived,is_virtual_base_of,Base&,Derived,false)
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BOOST_TT_AUX_BOOL_TRAIT_PARTIAL_SPEC2_2(typename Base,typename Derived,is_virtual_base_of,Base,Derived&,false)
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BOOST_TT_AUX_BOOL_TRAIT_PARTIAL_SPEC2_2(typename Base,typename Derived,is_virtual_base_of,Base&,Derived&,false)
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#endif
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} // namespace boost
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#include <boost/type_traits/detail/bool_trait_undef.hpp>
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#endif
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