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// // handler_type.hpp // ~~~~~~~~~~~~~~~~ // // Copyright (c) 2003-2018 Christopher M. Kohlhoff (chris at kohlhoff dot 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_ASIO_HANDLER_TYPE_HPP #define BOOST_ASIO_HANDLER_TYPE_HPP #if defined(_MSC_VER) && (_MSC_VER >= 1200) # pragma once #endif // defined(_MSC_VER) && (_MSC_VER >= 1200) #include <boost/asio/detail/config.hpp> #include <boost/asio/detail/type_traits.hpp> #include <boost/asio/detail/push_options.hpp> namespace boost { namespace asio { /// (Deprecated: Use two-parameter version of async_result.) Default handler /// type traits provided for all completion token types. /** * The handler_type traits class is used for determining the concrete handler * type to be used for an asynchronous operation. It allows the handler type to * be determined at the point where the specific completion handler signature * is known. * * This template may be specialised for user-defined completion token types. */ template <typename CompletionToken, typename Signature, typename = void> struct handler_type { /// The handler type for the specific signature. typedef typename conditional< is_same<CompletionToken, typename decay<CompletionToken>::type>::value, decay<CompletionToken>, handler_type<typename decay<CompletionToken>::type, Signature> >::type::type type; }; } // namespace asio } // namespace boost #include <boost/asio/detail/pop_options.hpp> #endif // BOOST_ASIO_HANDLER_TYPE_HPP
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12 entries across 12 versions & 1 rubygems