Method poll

user/src/bin/stackless_coroutine.rs:41–52

(mut self: Pin<&mut Self>, _cx: &mut Context)

    type Output = ();

    fn poll(mut self: Pin<&mut Self>, _cx: &mut Context) -> Poll<Self::Output> {
        match self.task.state {
            State::Halted => {
                self.task.state = State::Running;
                Poll::Ready(())
            }
            State::Running => {
                self.task.state = State::Halted;
                Poll::Pending
            }
        }
    }
}

struct Executor {