ceph/src/boost/boost/asio/placeholders.hpp

   1 //
   2 // placeholders.hpp
   3 // ~~~~~~~~~~~~~~~~
   4 //
   5 // Copyright (c) 2003-2017 Christopher M. Kohlhoff (chris at kohlhoff dot com)
   6 //
   7 // Distributed under the Boost Software License, Version 1.0. (See accompanying
   8 // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
   9 //
  10
  11 #ifndef BOOST_ASIO_PLACEHOLDERS_HPP
  12 #define BOOST_ASIO_PLACEHOLDERS_HPP
  13
  14 #if defined(_MSC_VER) && (_MSC_VER >= 1200)
  15 # pragma once
  16 #endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
  17
  18 #include <boost/asio/detail/config.hpp>
  19
  20 #if defined(BOOST_ASIO_HAS_BOOST_BIND)
  21 # include <boost/bind/arg.hpp>
  22 #endif // defined(BOOST_ASIO_HAS_BOOST_BIND)
  23
  24 #include <boost/asio/detail/push_options.hpp>
  25
  26 namespace boost {
  27 namespace asio {
  28 namespace placeholders {
  29
  30 #if defined(GENERATING_DOCUMENTATION)
  31
  32 /// An argument placeholder, for use with boost::bind(), that corresponds to
  33 /// the error argument of a handler for any of the asynchronous functions.
  34 unspecified error;
  35
  36 /// An argument placeholder, for use with boost::bind(), that corresponds to
  37 /// the bytes_transferred argument of a handler for asynchronous functions such
  38 /// as boost::asio::basic_stream_socket::async_write_some or
  39 /// boost::asio::async_write.
  40 unspecified bytes_transferred;
  41
  42 /// An argument placeholder, for use with boost::bind(), that corresponds to
  43 /// the iterator argument of a handler for asynchronous functions such as
  44 /// boost::asio::async_connect.
  45 unspecified iterator;
  46
  47 /// An argument placeholder, for use with boost::bind(), that corresponds to
  48 /// the results argument of a handler for asynchronous functions such as
  49 /// boost::asio::basic_resolver::async_resolve.
  50 unspecified results;
  51
  52 /// An argument placeholder, for use with boost::bind(), that corresponds to
  53 /// the results argument of a handler for asynchronous functions such as
  54 /// boost::asio::async_connect.
  55 unspecified endpoint;
  56
  57 /// An argument placeholder, for use with boost::bind(), that corresponds to
  58 /// the signal_number argument of a handler for asynchronous functions such as
  59 /// boost::asio::signal_set::async_wait.
  60 unspecified signal_number;
  61
  62 #elif defined(BOOST_ASIO_HAS_BOOST_BIND)
  63 # if defined(__BORLANDC__) || defined(__GNUC__)
  64
  65 inline boost::arg<1> error()
  66 {
  67   return boost::arg<1>();
  68 }
  69
  70 inline boost::arg<2> bytes_transferred()
  71 {
  72   return boost::arg<2>();
  73 }
  74
  75 inline boost::arg<2> iterator()
  76 {
  77   return boost::arg<2>();
  78 }
  79
  80 inline boost::arg<2> results()
  81 {
  82   return boost::arg<2>();
  83 }
  84
  85 inline boost::arg<2> endpoint()
  86 {
  87   return boost::arg<2>();
  88 }
  89
  90 inline boost::arg<2> signal_number()
  91 {
  92   return boost::arg<2>();
  93 }
  94
  95 # else
  96
  97 namespace detail
  98 {
  99   template <int Number>
 100   struct placeholder
 101   {
 102     static boost::arg<Number>& get()
 103     {
 104       static boost::arg<Number> result;
 105       return result;
 106     }
 107   };
 108 }
 109
 110 #  if defined(BOOST_ASIO_MSVC) && (BOOST_ASIO_MSVC < 1400)
 111
 112 static boost::arg<1>& error
 113   = boost::asio::placeholders::detail::placeholder<1>::get();
 114 static boost::arg<2>& bytes_transferred
 115   = boost::asio::placeholders::detail::placeholder<2>::get();
 116 static boost::arg<2>& iterator
 117   = boost::asio::placeholders::detail::placeholder<2>::get();
 118 static boost::arg<2>& results
 119   = boost::asio::placeholders::detail::placeholder<2>::get();
 120 static boost::arg<2>& endpoint
 121   = boost::asio::placeholders::detail::placeholder<2>::get();
 122 static boost::arg<2>& signal_number
 123   = boost::asio::placeholders::detail::placeholder<2>::get();
 124
 125 #  else
 126
 127 namespace
 128 {
 129   boost::arg<1>& error
 130     = boost::asio::placeholders::detail::placeholder<1>::get();
 131   boost::arg<2>& bytes_transferred
 132     = boost::asio::placeholders::detail::placeholder<2>::get();
 133   boost::arg<2>& iterator
 134     = boost::asio::placeholders::detail::placeholder<2>::get();
 135   boost::arg<2>& results
 136     = boost::asio::placeholders::detail::placeholder<2>::get();
 137   boost::arg<2>& endpoint
 138     = boost::asio::placeholders::detail::placeholder<2>::get();
 139   boost::arg<2>& signal_number
 140     = boost::asio::placeholders::detail::placeholder<2>::get();
 141 } // namespace
 142
 143 #  endif
 144 # endif
 145 #endif
 146
 147 } // namespace placeholders
 148 } // namespace asio
 149 } // namespace boost
 150
 151 #include <boost/asio/detail/pop_options.hpp>
 152
 153 #endif // BOOST_ASIO_PLACEHOLDERS_HPP