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//@ run-pass
#![allow(dead_code)]
#![allow(non_camel_case_types)]
enum pattern { tabby, tortoiseshell, calico }
enum breed { beagle, rottweiler, pug }
type name = String;
enum ear_kind { lop, upright }
enum animal { cat(pattern), dog(breed), rabbit(name, ear_kind), tiger }
fn noise(a: animal) -> Option<String> {
match a {
animal::cat(..) => { Some("meow".to_string()) }
animal::dog(..) => { Some("woof".to_string()) }
animal::rabbit(..) => { None }
animal::tiger => { Some("roar".to_string()) }
}
}
pub fn main() {
assert_eq!(noise(animal::cat(pattern::tabby)), Some("meow".to_string()));
assert_eq!(noise(animal::dog(breed::pug)), Some("woof".to_string()));
assert_eq!(noise(animal::rabbit("Hilbert".to_string(), ear_kind::upright)), None);
assert_eq!(noise(animal::tiger), Some("roar".to_string()));
}
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