//  (C) Copyright John Maddock 2010.
//  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_CONDITIONAL_HPP_INCLUDED
#define BOOST_TT_CONDITIONAL_HPP_INCLUDED

#include <boost/config.hpp>

namespace boost {

template <bool b, class T, class U> struct conditional
{
    typedef T type;
};
template <class T, class U> struct conditional<false, T, U>
{
    typedef U type;
};

#if !defined(BOOST_NO_CXX11_TEMPLATE_ALIASES)

template <bool b, class T, class U> using conditional_t = typename conditional<b, T, U>::type;

#endif

} // namespace boost

#endif // BOOST_TT_CONDITIONAL_HPP_INCLUDED
