123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596 |
- //
- // async_result.hpp
- // ~~~~~~~~~~~~~~~~
- //
- // Copyright (c) 2003-2019 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 ARCHETYPES_ASYNC_RESULT_HPP
- #define ARCHETYPES_ASYNC_RESULT_HPP
- #include <boost/asio/async_result.hpp>
- namespace archetypes {
- struct lazy_handler
- {
- };
- template <typename Signature>
- struct concrete_handler;
- template <typename R, typename Arg1>
- struct concrete_handler<R(Arg1)>
- {
- concrete_handler(lazy_handler)
- {
- }
- void operator()(typename boost::asio::decay<Arg1>::type)
- {
- }
- #if defined(BOOST_ASIO_HAS_MOVE)
- concrete_handler(concrete_handler&&) {}
- private:
- concrete_handler(const concrete_handler&);
- #endif // defined(BOOST_ASIO_HAS_MOVE)
- };
- template <typename R, typename Arg1, typename Arg2>
- struct concrete_handler<R(Arg1, Arg2)>
- {
- concrete_handler(lazy_handler)
- {
- }
- void operator()(typename boost::asio::decay<Arg1>::type, typename boost::asio::decay<Arg2>::type)
- {
- }
- #if defined(BOOST_ASIO_HAS_MOVE)
- concrete_handler(concrete_handler&&) {}
- private:
- concrete_handler(const concrete_handler&);
- #endif // defined(BOOST_ASIO_HAS_MOVE)
- };
- } // namespace archetypes
- namespace boost {
- namespace asio {
- template <typename Signature>
- class async_result<archetypes::lazy_handler, Signature>
- {
- public:
- // The concrete completion handler type.
- typedef archetypes::concrete_handler<Signature> completion_handler_type;
- // The return type of the initiating function.
- typedef int return_type;
- // Construct an async_result from a given handler.
- explicit async_result(completion_handler_type&)
- {
- }
- // Obtain the value to be returned from the initiating function.
- return_type get()
- {
- return 42;
- }
- private:
- // Disallow copying and assignment.
- async_result(const async_result&) BOOST_ASIO_DELETED;
- async_result& operator=(const async_result&) BOOST_ASIO_DELETED;
- };
- } // namespace asio
- } // namespace boost
- #endif // ARCHETYPES_ASYNC_RESULT_HPP
|