fn foo(y: i32) {
    println!("Foo {}", y);
}

fn main() {
    let y: i32 = 1;
    let mut maybe_x: Option<i32> = None;
    if true {
        maybe_x = Some(2);
    }

    match maybe_x {
        None => foo(y),
        Some(x) => {
            if x != y {
                foo(y)
            }
        },
    }
}