Function asio_handler_is_continuation

include/boost/asio/composed.hpp:187–193

template <typename Impl, typename Work, typename Handler, typename Signature>
inline bool asio_handler_is_continuation(
    composed_op<Impl, Work, Handler, Signature>* this_handler)
{
  return this_handler->invocations_ > 1 ? true
    : BOOST_ASIO_VERSIONED_NAME(handler_cont_helpers)::is_continuation(
        this_handler->handler_);
}

template <typename Implementation, typename Executors, typename... Signatures>
class initiate_composed