#![allow(dead_code, deprecated, unused_variables, unused_mut)]
use std::fmt;
struct Foo(i32, String);
impl fmt::Debug for Foo {
    fn fmt(&self, fmt: &mut fmt::Formatter<'_>) -> fmt::Result {
        fmt.debug_tuple("Foo").field(&self.0).field(&self.1).finish()
    }
}
fn main() {
    assert_eq!(
        format!("{:?}", Foo(10, "Hello World".to_string())), r#"Foo(10, "Hello World")"#,
    );
}