#![allow(dead_code, deprecated, unused_variables, unused_mut)]
fn main() {
    let x: Result<u32, &str> = Ok(2);
    assert_eq!(x.as_ref(), Ok(& 2));
    let x: Result<u32, &str> = Err("Error");
    assert_eq!(x.as_ref(), Err(& "Error"));
}