| //@ 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())); |
| } |
