boost/type_traits/conditional.hpp
// (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
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