attach await_ready await_suspend cast_ret_value convert_to detach forward_to forward_to future future future get get_promise has_exception has_value is_awaited is_deferred is_in_progress is_pending operator cast_ret_value operator! operator<< operator>> requires ret_value set_callback setDeferredEvaluation start startDeferredEvaluation then unset_callback wait ~future

set_callback() template<typename T > template<std::invocable<> Fn> bool coro::future< T >::set_callback ( Fn &&  fn ) inline Sets callback which is called once future is resolved (in future) The function is called only when future is unresolved in time of set. Parameters fn function. The function can return std::coroutine_handke<>, which causes that returned coroutine will be resumed. Other return value is ignored. Return values true callback has been set, and will be called false callback was not set, because future is already resolved. Note There can be only one callback at time There can be only one callback at time. Attempt to call this function twice can cause that previous function is destroyed without calling. However this is way how to replace the callback function before resolution. Definition at line 617 of file future.h.