Method chat_session

example/cpp20/coroutines/chat_server.cpp:89–95

{
public:
  chat_session(tcp::socket socket, chat_room& room)
    : socket_(std::move(socket)),
      timer_(socket_.get_executor()),
      room_(room)
  {
    timer_.expires_at(std::chrono::steady_clock::time_point::max());
  }

  void start()
  {