main.rs

fn main() {
    let lol: Option<&str> = Some("lol");

    if lol.is_none() {
        // do some error handling
        return;
    }

    // I'd love if `lol` was asserted to be Some("lol")
    // below this if clause.
    assert_eq!(lol, Some("lol"));

    // …buuut it's not, so I must (is this safe now?!) unwrap()
    // it to work with its value.
    let lel = lol.unwrap();

    assert_eq!(lel, "lol");
}