main.rs

fn main() {
    f1(Some(("value 1".to_string(), "value 2".to_string())))
}


fn f1(original: Option<(String, String)>) {
    let shared = original.as_ref().map(|&(ref a, ref b)| (a.as_slice(), b.as_slice()));
    f2(shared);
}

fn f2(shared: Option<(&str, &str)>) {
    match shared {
        Some((v1, v2)) => println!("Example: `{}` and `{}`", v1, v2),
        None => println!("Nothing here!")
    };
}