#![allow(dead_code, deprecated, unused_variables, unused_mut)]
use std::task::{Context, Poll};
use std::future::{self, Future};
use std::pin::Pin;
pub fn do_poll(cx: &mut Context<'_>) -> Poll<()> {
    let mut fut = future::ready(42);
    let fut = Pin::new(&mut fut);
    let num = match fut.poll(cx) {
        Poll::Ready(t) => t,
        Poll::Pending => return Poll::Pending,
    };
    let _ = num;
    Poll::Ready(())
}
fn main() {}