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122 lines
3.1 KiB
122 lines
3.1 KiB
// |
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// placeholders.hpp |
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// ~~~~~~~~~~~~~~~~ |
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// |
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// Copyright (c) 2003-2011 Christopher M. Kohlhoff (chris at kohlhoff dot com) |
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// |
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// Distributed under the Boost Software License, Version 1.0. (See accompanying |
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// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) |
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// |
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#ifndef BOOST_ASIO_PLACEHOLDERS_HPP |
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#define BOOST_ASIO_PLACEHOLDERS_HPP |
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#if defined(_MSC_VER) && (_MSC_VER >= 1200) |
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# pragma once |
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#endif // defined(_MSC_VER) && (_MSC_VER >= 1200) |
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#include <boost/asio/detail/config.hpp> |
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#include <boost/bind/arg.hpp> |
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#include <boost/detail/workaround.hpp> |
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#include <boost/asio/detail/push_options.hpp> |
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namespace boost { |
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namespace asio { |
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namespace placeholders { |
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#if defined(GENERATING_DOCUMENTATION) |
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/// An argument placeholder, for use with boost::bind(), that corresponds to |
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/// the error argument of a handler for any of the asynchronous functions. |
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unspecified error; |
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/// An argument placeholder, for use with boost::bind(), that corresponds to |
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/// the bytes_transferred argument of a handler for asynchronous functions such |
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/// as boost::asio::basic_stream_socket::async_write_some or |
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/// boost::asio::async_write. |
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unspecified bytes_transferred; |
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/// An argument placeholder, for use with boost::bind(), that corresponds to |
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/// the iterator argument of a handler for asynchronous functions such as |
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/// boost::asio::basic_resolver::async_resolve. |
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unspecified iterator; |
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/// An argument placeholder, for use with boost::bind(), that corresponds to |
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/// the signal_number argument of a handler for asynchronous functions such as |
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/// boost::asio::signal_set::async_wait. |
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unspecified signal_number; |
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#elif defined(__BORLANDC__) || defined(__GNUC__) |
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inline boost::arg<1> error() |
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{ |
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return boost::arg<1>(); |
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} |
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inline boost::arg<2> bytes_transferred() |
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{ |
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return boost::arg<2>(); |
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} |
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inline boost::arg<2> iterator() |
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{ |
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return boost::arg<2>(); |
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} |
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inline boost::arg<2> signal_number() |
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{ |
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return boost::arg<2>(); |
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} |
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#else |
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namespace detail |
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{ |
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template <int Number> |
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struct placeholder |
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{ |
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static boost::arg<Number>& get() |
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{ |
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static boost::arg<Number> result; |
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return result; |
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} |
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}; |
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} |
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#if BOOST_WORKAROUND(BOOST_MSVC, < 1400) |
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static boost::arg<1>& error |
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= boost::asio::placeholders::detail::placeholder<1>::get(); |
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static boost::arg<2>& bytes_transferred |
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= boost::asio::placeholders::detail::placeholder<2>::get(); |
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static boost::arg<2>& iterator |
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= boost::asio::placeholders::detail::placeholder<2>::get(); |
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static boost::arg<2>& signal_number |
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= boost::asio::placeholders::detail::placeholder<2>::get(); |
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#else |
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namespace |
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{ |
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boost::arg<1>& error |
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= boost::asio::placeholders::detail::placeholder<1>::get(); |
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boost::arg<2>& bytes_transferred |
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= boost::asio::placeholders::detail::placeholder<2>::get(); |
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boost::arg<2>& iterator |
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= boost::asio::placeholders::detail::placeholder<2>::get(); |
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boost::arg<2>& signal_number |
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= boost::asio::placeholders::detail::placeholder<2>::get(); |
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} // namespace |
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#endif |
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#endif |
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} // namespace placeholders |
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} // namespace asio |
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} // namespace boost |
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#include <boost/asio/detail/pop_options.hpp> |
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#endif // BOOST_ASIO_PLACEHOLDERS_HPP
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