#![allow(dead_code, deprecated, unused_variables, unused_mut)]
use std::sync::atomic::{AtomicI8, Ordering};
fn main() {
    let x = AtomicI8::new(7);
    assert_eq!(x.fetch_update(Ordering::SeqCst, Ordering::SeqCst, | _ | None), Err(7));
    assert_eq!(
        x.fetch_update(Ordering::SeqCst, Ordering::SeqCst, | x | Some(x + 1)), Ok(7)
    );
    assert_eq!(
        x.fetch_update(Ordering::SeqCst, Ordering::SeqCst, | x | Some(x + 1)), Ok(8)
    );
    assert_eq!(x.load(Ordering::SeqCst), 9);
}