Method read_line

example/cpp11/timeouts/blocking_tcp_client.cpp:65–92

  }

  std::string read_line(std::chrono::steady_clock::duration timeout)
  {
    // Start the asynchronous operation. The lambda that is used as a callback
    // will update the error and n variables when the operation completes. The
    // blocking_udp_client.cpp example shows how you can use std::bind rather
    // than a lambda.
    boost::system::error_code error;
    std::size_t n = 0;
    boost::asio::async_read_until(socket_,
        boost::asio::dynamic_buffer(input_buffer_), '\n',
        [&](const boost::system::error_code& result_error,
            std::size_t result_n)
        {
          error = result_error;
          n = result_n;
        });

    // Run the operation until it completes, or until the timeout.
    run(timeout);

    // Determine whether the read completed successfully.
    if (error)
      throw boost::system::system_error(error);

    std::string line(input_buffer_.substr(0, n - 1));
    input_buffer_.erase(0, n);
    return line;
  }

  void write_line(const std::string& line,
      std::chrono::steady_clock::duration timeout)