is_base_of.hpp

来自「support vector clustering for vc++」· HPP 代码 · 共 41 行

//  (C) Copyright Rani Sharoni 2003-2005.
//  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_BASE_OF_HPP_INCLUDED
#define BOOST_TT_IS_BASE_OF_HPP_INCLUDED

#include <boost/type_traits/is_base_and_derived.hpp>
#include <boost/type_traits/is_same.hpp>
#include <boost/type_traits/detail/ice_or.hpp>

// should be the last #include
#include <boost/type_traits/detail/bool_trait_def.hpp>

namespace boost {

BOOST_TT_AUX_BOOL_TRAIT_DEF2(
      is_base_of
    , Base
    , Derived
    , (::boost::type_traits::ice_or<      
         (::boost::detail::is_base_and_derived_impl<Base,Derived>::value),
         (::boost::is_same<Base,Derived>::value)>::value)
    )

#ifndef BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION
BOOST_TT_AUX_BOOL_TRAIT_PARTIAL_SPEC2_2(typename Base,typename Derived,is_base_of,Base&,Derived,false)
BOOST_TT_AUX_BOOL_TRAIT_PARTIAL_SPEC2_2(typename Base,typename Derived,is_base_of,Base,Derived&,false)
BOOST_TT_AUX_BOOL_TRAIT_PARTIAL_SPEC2_2(typename Base,typename Derived,is_base_of,Base&,Derived&,false)
#endif

} // namespace boost

#include <boost/type_traits/detail/bool_trait_undef.hpp>

#endif // BOOST_TT_IS_BASE_AND_DERIVED_HPP_INCLUDED