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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 | ||
16 | namespace boost { | |
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 = ( | |
25 | (::boost::detail::is_base_and_derived_impl<ncvB,ncvD>::value) || | |
26 | (::boost::is_same<ncvB,ncvD>::value && ::boost::is_class<ncvB>::value))); | |
27 | }; | |
28 | } | |
29 | ||
30 | template <class Base, class Derived> struct is_base_of | |
31 | : public integral_constant<bool, (::boost::detail::is_base_of_imp<Base, Derived>::value)> {}; | |
32 | ||
33 | template <class Base, class Derived> struct is_base_of<Base, Derived&> : false_type{}; | |
34 | template <class Base, class Derived> struct is_base_of<Base&, Derived&> : false_type{}; | |
35 | template <class Base, class Derived> struct is_base_of<Base&, Derived> : false_type{}; | |
36 | ||
37 | } // namespace boost | |
38 | ||
39 | #endif // BOOST_TT_IS_BASE_AND_DERIVED_HPP_INCLUDED |