struct Struct {
    f fn () ?[2]int
    g fn () [2]int
}

fn test_struct_member() {
    s := Struct{
        f: fn () ?[2]int {
            return [1, 2]!
        }
        g: fn () [2]int {
            return [1, 2]!
        }
    }

    mut a := s.f()
    println(s.f())
    dump(a)
    mut b := s.g()
    println(s.g())
    dump(b)
}

fn test_fn_var() {
    mut h := fn () [2]int {
        return [1, 2]!
    }
    mut i := fn () ?[2]int {
        return [1, 2]!
    }

    mut c := h()
    println(h())
    dump(c)
    mut d := i()
    println(i())
    dump(d)
}