#![allow(dead_code, deprecated, unused_variables, unused_mut)]
use std::fmt;
struct Foo {
    nb: i32,
}
impl Foo {
    fn new(nb: i32) -> Foo {
        Foo { nb }
    }
}
impl fmt::Display for Foo {
    fn fmt(&self, formatter: &mut fmt::Formatter<'_>) -> fmt::Result {
        let tmp = self.nb.abs().to_string();
        formatter.pad_integral(self.nb >= 0, "Foo ", &tmp)
    }
}
fn main() {
    assert_eq!(format!("{}", Foo::new(2)), "2");
    assert_eq!(format!("{}", Foo::new(- 1)), "-1");
    assert_eq!(format!("{}", Foo::new(0)), "0");
    assert_eq!(format!("{:#}", Foo::new(- 1)), "-Foo 1");
    assert_eq!(format!("{:0>#8}", Foo::new(- 1)), "00-Foo 1");
}