40 lines
1.5 KiB
Plaintext
40 lines
1.5 KiB
Plaintext
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// (C) Copyright Rani Sharoni 2003-2005.
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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_BASE_OF_HPP_INCLUDED
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#define BOOST_TT_IS_BASE_OF_HPP_INCLUDED
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#include <boost/type_traits/is_base_and_derived.hpp>
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#include <boost/type_traits/is_same.hpp>
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#include <boost/type_traits/is_class.hpp>
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namespace boost {
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namespace detail{
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template <class B, class D>
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struct is_base_of_imp
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{
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typedef typename remove_cv<B>::type ncvB;
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typedef typename remove_cv<D>::type ncvD;
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BOOST_STATIC_CONSTANT(bool, value = (
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(::boost::detail::is_base_and_derived_impl<ncvB,ncvD>::value) ||
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(::boost::is_same<ncvB,ncvD>::value && ::boost::is_class<ncvB>::value)));
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};
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}
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template <class Base, class Derived> struct is_base_of
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: public integral_constant<bool, (::boost::detail::is_base_of_imp<Base, Derived>::value)> {};
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template <class Base, class Derived> struct is_base_of<Base, Derived&> : false_type{};
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template <class Base, class Derived> struct is_base_of<Base&, Derived&> : false_type{};
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template <class Base, class Derived> struct is_base_of<Base&, Derived> : false_type{};
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} // namespace boost
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#endif // BOOST_TT_IS_BASE_AND_DERIVED_HPP_INCLUDED
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