Method write

example/cpp11/chat/chat_client.cpp:33–45

  }

  void write(const chat_message& msg)
  {
    boost::asio::post(io_context_,
        [this, msg]()
        {
          bool write_in_progress = !write_msgs_.empty();
          write_msgs_.push_back(msg);
          if (!write_in_progress)
          {
            do_write();
          }
        });
  }

  void close()
  {