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- //
- // placeholders.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_PLACEHOLDERS_HPP
- #define ASIO_PLACEHOLDERS_HPP
-
- #if defined(_MSC_VER) && (_MSC_VER >= 1200)
- # pragma once
- #endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
-
- #include "asio/detail/config.hpp"
-
- #if defined(ASIO_HAS_BOOST_BIND)
- # include <boost/bind/arg.hpp>
- #endif // defined(ASIO_HAS_BOOST_BIND)
-
- #include "asio/detail/push_options.hpp"
-
- namespace asio {
- namespace placeholders {
-
- #if defined(GENERATING_DOCUMENTATION)
-
- /// An argument placeholder, for use with boost::bind(), that corresponds to
- /// the error argument of a handler for any of the asynchronous functions.
- unspecified error;
-
- /// An argument placeholder, for use with boost::bind(), that corresponds to
- /// the bytes_transferred argument of a handler for asynchronous functions such
- /// as asio::basic_stream_socket::async_write_some or
- /// asio::async_write.
- unspecified bytes_transferred;
-
- /// An argument placeholder, for use with boost::bind(), that corresponds to
- /// the iterator argument of a handler for asynchronous functions such as
- /// asio::async_connect.
- unspecified iterator;
-
- /// An argument placeholder, for use with boost::bind(), that corresponds to
- /// the results argument of a handler for asynchronous functions such as
- /// asio::basic_resolver::async_resolve.
- unspecified results;
-
- /// An argument placeholder, for use with boost::bind(), that corresponds to
- /// the results argument of a handler for asynchronous functions such as
- /// asio::async_connect.
- unspecified endpoint;
-
- /// An argument placeholder, for use with boost::bind(), that corresponds to
- /// the signal_number argument of a handler for asynchronous functions such as
- /// asio::signal_set::async_wait.
- unspecified signal_number;
-
- #elif defined(ASIO_HAS_BOOST_BIND)
- # if defined(__BORLANDC__) || defined(__GNUC__)
-
- inline boost::arg<1> error()
- {
- return boost::arg<1>();
- }
-
- inline boost::arg<2> bytes_transferred()
- {
- return boost::arg<2>();
- }
-
- inline boost::arg<2> iterator()
- {
- return boost::arg<2>();
- }
-
- inline boost::arg<2> results()
- {
- return boost::arg<2>();
- }
-
- inline boost::arg<2> endpoint()
- {
- return boost::arg<2>();
- }
-
- inline boost::arg<2> signal_number()
- {
- return boost::arg<2>();
- }
-
- # else
-
- namespace detail
- {
- template <int Number>
- struct placeholder
- {
- static boost::arg<Number>& get()
- {
- static boost::arg<Number> result;
- return result;
- }
- };
- }
-
- # if defined(ASIO_MSVC) && (ASIO_MSVC < 1400)
-
- static boost::arg<1>& error
- = asio::placeholders::detail::placeholder<1>::get();
- static boost::arg<2>& bytes_transferred
- = asio::placeholders::detail::placeholder<2>::get();
- static boost::arg<2>& iterator
- = asio::placeholders::detail::placeholder<2>::get();
- static boost::arg<2>& results
- = asio::placeholders::detail::placeholder<2>::get();
- static boost::arg<2>& endpoint
- = asio::placeholders::detail::placeholder<2>::get();
- static boost::arg<2>& signal_number
- = asio::placeholders::detail::placeholder<2>::get();
-
- # else
-
- namespace
- {
- boost::arg<1>& error
- = asio::placeholders::detail::placeholder<1>::get();
- boost::arg<2>& bytes_transferred
- = asio::placeholders::detail::placeholder<2>::get();
- boost::arg<2>& iterator
- = asio::placeholders::detail::placeholder<2>::get();
- boost::arg<2>& results
- = asio::placeholders::detail::placeholder<2>::get();
- boost::arg<2>& endpoint
- = asio::placeholders::detail::placeholder<2>::get();
- boost::arg<2>& signal_number
- = asio::placeholders::detail::placeholder<2>::get();
- } // namespace
-
- # endif
- # endif
- #endif
-
- } // namespace placeholders
- } // namespace asio
-
- #include "asio/detail/pop_options.hpp"
-
- #endif // ASIO_PLACEHOLDERS_HPP
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