boost/type_traits/is_base_of.hpp

   1
   2 //  (C) Copyright Rani Sharoni 2003-2005.
   3 //  Use, modification and distribution are subject to the Boost Software License,
   4 //  Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
   5 //  http://www.boost.org/LICENSE_1_0.txt).
   6 //
   7 //  See http://www.boost.org/libs/type_traits for most recent version including documentation.
   8
   9 #ifndef BOOST_TT_IS_BASE_OF_HPP_INCLUDED
  10 #define BOOST_TT_IS_BASE_OF_HPP_INCLUDED
  11
  12 #include <boost/type_traits/is_base_and_derived.hpp>
  13 #include <boost/type_traits/is_same.hpp>
  14 #include <boost/type_traits/is_class.hpp>
  15 #include <boost/type_traits/detail/ice_or.hpp>
  16 #include <boost/type_traits/detail/ice_and.hpp>
  17
  18 // should be the last #include
  19 #include <boost/type_traits/detail/bool_trait_def.hpp>
  20
  21 namespace boost {
  22
  23    namespace detail{
  24       template <class B, class D>
  25       struct is_base_of_imp
  26       {
  27           typedef typename remove_cv<B>::type ncvB;
  28           typedef typename remove_cv<D>::type ncvD;
  29           BOOST_STATIC_CONSTANT(bool, value = (::boost::type_traits::ice_or<
  30             (::boost::detail::is_base_and_derived_impl<ncvB,ncvD>::value),
  31             (::boost::type_traits::ice_and< ::boost::is_same<ncvB,ncvD>::value, ::boost::is_class<ncvB>::value>::value)>::value));
  32       };
  33    }
  34
  35 BOOST_TT_AUX_BOOL_TRAIT_DEF2(
  36       is_base_of
  37     , Base
  38     , Derived
  39     , (::boost::detail::is_base_of_imp<Base, Derived>::value))
  40
  41 #ifndef BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION
  42 BOOST_TT_AUX_BOOL_TRAIT_PARTIAL_SPEC2_2(typename Base,typename Derived,is_base_of,Base&,Derived,false)
  43 BOOST_TT_AUX_BOOL_TRAIT_PARTIAL_SPEC2_2(typename Base,typename Derived,is_base_of,Base,Derived&,false)
  44 BOOST_TT_AUX_BOOL_TRAIT_PARTIAL_SPEC2_2(typename Base,typename Derived,is_base_of,Base&,Derived&,false)
  45 #endif
  46
  47 } // namespace boost
  48
  49 #include <boost/type_traits/detail/bool_trait_undef.hpp>
  50
  51 #endif // BOOST_TT_IS_BASE_AND_DERIVED_HPP_INCLUDED