option_move.rs

fn foo1() {
    let foo: Option<i32> = Some(1234);
    println!("{}", foo.unwrap_or(4321));

    let bar = foo;
}

fn foo2() {
    let foo: Option<String> = Some("1234".to_string());
    println!("{}", foo.unwrap_or("4321".to_string()));

    let bar = foo;
}