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_TR1_HPP_INCLUDED
10 #define BOOST_TT_IS_BASE_OF_TR1_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 
16 namespace boost { namespace tr1{
17 
18    namespace detail{
19       template <class B, class D>
20       struct is_base_of_imp
21       {
22           typedef typename remove_cv<B>::type ncvB;
23           typedef typename remove_cv<D>::type ncvD;
24           BOOST_STATIC_CONSTANT(bool, value = ((::boost::detail::is_base_and_derived_impl<ncvB,ncvD>::value) || (::boost::is_same<ncvB,ncvD>::value)));
25       };
26    }
27 
28    template <class Base, class Derived> struct is_base_of
29       : public integral_constant<bool, (::boost::tr1::detail::is_base_of_imp<Base, Derived>::value)>{};
30 
31    template <class Base, class Derived> struct is_base_of<Base, Derived&> : public false_type{};
32    template <class Base, class Derived> struct is_base_of<Base&, Derived&> : public false_type{};
33    template <class Base, class Derived> struct is_base_of<Base&, Derived> : public false_type{};
34 
35 } } // namespace boost
36 
37 #endif // BOOST_TT_IS_BASE_OF_TR1_HPP_INCLUDED
38