Derive Macro Handler 

#[derive(Handler)]
{
    // Attributes available to this derive:
    #[state]
}

Implements HandleExit for your Handler.

Usage

#[derive(HandleExit)]
struct MyHandler { .. }

Which generates the following implementation:

impl HandleExit for MyHandler {
    type Exit = ExitReason<MyHandler::Exception>;
 
    async fn handle_exit(
        self,
        state: &mut Self::State,
        reason: ExitReason<Self::Exception>,
    ) -> ExitFlow<Self> {
        ExitFlow::Exit(reason)
    }
}