| // |
| // placeholders.hpp |
| // ~~~~~~~~~~~~~~~~ |
| // |
| // Copyright (c) 2003-2008 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_PLACEHOLDERS_HPP |
| #define BOOST_ASIO_PLACEHOLDERS_HPP |
| |
| #if defined(_MSC_VER) && (_MSC_VER >= 1200) |
| # pragma once |
| #endif // defined(_MSC_VER) && (_MSC_VER >= 1200) |
| |
| #include <boost/asio/detail/push_options.hpp> |
| |
| #include <boost/asio/detail/push_options.hpp> |
| #include <boost/bind/arg.hpp> |
| #include <boost/detail/workaround.hpp> |
| #include <boost/asio/detail/pop_options.hpp> |
| |
| namespace boost { |
| 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 boost::asio::basic_stream_socket::async_write_some or |
| /// boost::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 |
| /// boost::asio::basic_resolver::resolve. |
| unspecified iterator; |
| |
| #elif 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>(); |
| } |
| |
| #else |
| |
| namespace detail |
| { |
| template <int Number> |
| struct placeholder |
| { |
| static boost::arg<Number>& get() |
| { |
| static boost::arg<Number> result; |
| return result; |
| } |
| }; |
| } |
| |
| #if BOOST_WORKAROUND(BOOST_MSVC, < 1400) |
| |
| static boost::arg<1>& error |
| = boost::asio::placeholders::detail::placeholder<1>::get(); |
| static boost::arg<2>& bytes_transferred |
| = boost::asio::placeholders::detail::placeholder<2>::get(); |
| static boost::arg<2>& iterator |
| = boost::asio::placeholders::detail::placeholder<2>::get(); |
| |
| #else |
| |
| namespace |
| { |
| boost::arg<1>& error |
| = boost::asio::placeholders::detail::placeholder<1>::get(); |
| boost::arg<2>& bytes_transferred |
| = boost::asio::placeholders::detail::placeholder<2>::get(); |
| boost::arg<2>& iterator |
| = boost::asio::placeholders::detail::placeholder<2>::get(); |
| } // namespace |
| |
| #endif |
| |
| #endif |
| |
| } // namespace placeholders |
| } // namespace asio |
| } // namespace boost |
| |
| #include <boost/asio/detail/pop_options.hpp> |
| |
| #endif // BOOST_ASIO_PLACEHOLDERS_HPP |