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- // (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
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