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文件: /usr/include/boost/type_traits/detected_or.hpp
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/* Copyright 2017-2018 Glen Joseph Fernandes (glenjofe@gmail.com) Distributed under 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) */ #ifndef BOOST_TT_DETECTED_OR_HPP_INCLUDED #define BOOST_TT_DETECTED_OR_HPP_INCLUDED #include <boost/type_traits/detail/detector.hpp> namespace boost { template<class Default, template<class...> class Op, class... Args> using detected_or = detail::detector<Default, void, Op, Args...>; template<class Default, template<class...> class Op, class... Args> using detected_or_t = typename detected_or<Default, Op, Args...>::type; } /* boost */ #endif
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