Method operator()

3rd/asio-1.24.0/include/asio/compose.hpp:368–374

  template<typename... T>
  void operator()(ASIO_MOVE_ARG(T)... t)
  {
    if (invocations_ < ~0u)
      ++invocations_;
    this->get_cancellation_state().slot().clear();
    impl_(*this, ASIO_MOVE_CAST(T)(t)...);
  }

  void complete(Args... args)
  {