value_enum.oc

/// out: "0|1 [42] => 42\n0|1 [43] => 43\n2 [5] => world\n3 [0] => ()"

enum Foo {
    Case0(x: i32)
    Case1(z: str, x: i32)
    Case2(z: str)
    Case3
}

def Foo::bar(this): i32 => match this {
    Case0(x) | Case1(x) => x
    Case2(z) => z.len() as i32
    Case3 => 0
}

def run(foo: Foo) {
    match foo {
        Case0(x) | Case1(x) => println(`0|1 [{foo.bar()}] => {x}`)
        Case2(z) => println(`2 [{foo.bar()}] => {z}`)
        Case3 => println(`3 [{foo.bar()}] => ()`)
    }
}

def main() {
    run(Case0(42))
    run(Foo::Case1("hello", 43))
    run(Foo::Case2("world"))
    run(Case3)
}