Method poll

crates/runtime/src/sim/executor/mod.rs:570–578

(mut self: Pin<&mut Self>, cx: &mut Context<'_>)

    type Output = ();

    fn poll(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output> {
        if self.yielded {
            Poll::Ready(())
        } else {
            self.yielded = true;
            cx.waker().wake_by_ref();
            Poll::Pending
        }
    }
}

/// Shared runnable queue used by the simulation executor.