type Animal = Cat | Dog

struct Cat {
    name string
}

struct Dog {
    name string
    age  int
}

fn make_animal() Animal {
    return Animal(Cat{
        name: 'whiskers'
    })
}

fn main() {
    a := make_animal()
    match a {
        Cat {
            println(a.name)
        }
        Dog {
            println(a.name)
        }
    }
}