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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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