| // |
| // handler_type.hpp |
| // ~~~~~~~~~~~~~~~~ |
| // |
| // Copyright (c) 2003-2015 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 ASIO_HANDLER_TYPE_HPP |
| #define ASIO_HANDLER_TYPE_HPP |
| |
| |
| #include "asio/detail/config.hpp" |
| |
| #include "asio/detail/push_options.hpp" |
| |
| namespace asio { |
| |
| /// Default handler type traits provided for all handlers. |
| /** |
| * 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 handler types. |
| */ |
| template <typename Handler, typename Signature> |
| struct handler_type |
| { |
| /// The handler type for the specific signature. |
| typedef Handler type; |
| }; |
| |
| |
| template <typename Handler, typename Signature> |
| struct handler_type<const Handler, Signature> |
| : handler_type<Handler, Signature> {}; |
| |
| template <typename Handler, typename Signature> |
| struct handler_type<volatile Handler, Signature> |
| : handler_type<Handler, Signature> {}; |
| |
| template <typename Handler, typename Signature> |
| struct handler_type<const volatile Handler, Signature> |
| : handler_type<Handler, Signature> {}; |
| |
| template <typename Handler, typename Signature> |
| struct handler_type<const Handler&, Signature> |
| : handler_type<Handler, Signature> {}; |
| |
| template <typename Handler, typename Signature> |
| struct handler_type<volatile Handler&, Signature> |
| : handler_type<Handler, Signature> {}; |
| |
| template <typename Handler, typename Signature> |
| struct handler_type<const volatile Handler&, Signature> |
| : handler_type<Handler, Signature> {}; |
| |
| template <typename Handler, typename Signature> |
| struct handler_type<Handler&, Signature> |
| : handler_type<Handler, Signature> {}; |
| |
| template <typename Handler, typename Signature> |
| struct handler_type<Handler&&, Signature> |
| : handler_type<Handler, Signature> {}; |
| |
| template <typename ReturnType, typename Signature> |
| struct handler_type<ReturnType(), Signature> |
| : handler_type<ReturnType(*)(), Signature> {}; |
| |
| template <typename ReturnType, typename Arg1, typename Signature> |
| struct handler_type<ReturnType(Arg1), Signature> |
| : handler_type<ReturnType(*)(Arg1), Signature> {}; |
| |
| template <typename ReturnType, typename Arg1, typename Arg2, typename Signature> |
| struct handler_type<ReturnType(Arg1, Arg2), Signature> |
| : handler_type<ReturnType(*)(Arg1, Arg2), Signature> {}; |
| |
| template <typename ReturnType, typename Arg1, typename Arg2, typename Arg3, |
| typename Signature> |
| struct handler_type<ReturnType(Arg1, Arg2, Arg3), Signature> |
| : handler_type<ReturnType(*)(Arg1, Arg2, Arg3), Signature> {}; |
| |
| template <typename ReturnType, typename Arg1, typename Arg2, typename Arg3, |
| typename Arg4, typename Signature> |
| struct handler_type<ReturnType(Arg1, Arg2, Arg3, Arg4), Signature> |
| : handler_type<ReturnType(*)(Arg1, Arg2, Arg3, Arg4), Signature> {}; |
| |
| template <typename ReturnType, typename Arg1, typename Arg2, typename Arg3, |
| typename Arg4, typename Arg5, typename Signature> |
| struct handler_type<ReturnType(Arg1, Arg2, Arg3, Arg4, Arg5), Signature> |
| : handler_type<ReturnType(*)(Arg1, Arg2, Arg3, Arg4, Arg5), Signature> {}; |
| |
| |
| } // namespace asio |
| |
| #include "asio/detail/pop_options.hpp" |
| |
| #define ASIO_HANDLER_TYPE(h, sig) typename handler_type<h, sig>::type |
| |
| #endif // ASIO_HANDLER_TYPE_HPP |