text: //
  // ssl/detail/read_op.hpp
  // ~~~~~~~~~~~~~~~~~~~~~~
  //
  // Copyright (c) 2003-2017 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_SSL_DETAIL_READ_OP_HPP
  #define BOOST_ASIO_SSL_DETAIL_READ_OP_HPP
  
  #if defined(_MSC_VER) && (_MSC_VER >= 1200)
  # pragma once
  #endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
  
  #include <boost/asio/detail/config.hpp>
  
  #if !defined(BOOST_ASIO_ENABLE_OLD_SSL)
  # include <boost/asio/detail/buffer_sequence_adapter.hpp>
  # include <boost/asio/ssl/detail/engine.hpp>
  #endif // !defined(BOOST_ASIO_ENABLE_OLD_SSL)
  
  #include <boost/asio/detail/push_options.hpp>
  
  namespace boost {
  namespace asio {
  namespace ssl {
  namespace detail {
  
  #if !defined(BOOST_ASIO_ENABLE_OLD_SSL)
  
  template <typename MutableBufferSequence>
  class read_op
  {
  public:
    read_op(const MutableBufferSequence& buffers)
      : buffers_(buffers)
    {
    }
  
    engine::want operator()(engine& eng,
        boost::system::error_code& ec,
        std::size_t& bytes_transferred) const
    {
      boost::asio::mutable_buffer buffer =
        boost::asio::detail::buffer_sequence_adapter<boost::asio::mutable_buffer,
          MutableBufferSequence>::first(buffers_);
  
      return eng.read(buffer, ec, bytes_transferred);
    }
  
    template <typename Handler>
    void call_handler(Handler& handler,
        const boost::system::error_code& ec,
        const std::size_t& bytes_transferred) const
    {
      handler(ec, bytes_transferred);
    }
  
  private:
    MutableBufferSequence buffers_;
  };
  
  #endif // !defined(BOOST_ASIO_ENABLE_OLD_SSL)
  
  } // namespace detail
  } // namespace ssl
  } // namespace asio
  } // namespace boost
  
  #include <boost/asio/detail/pop_options.hpp>
  
  #endif // BOOST_ASIO_SSL_DETAIL_READ_OP_HPP
  