| // Copyright 2012 The Rust Project Developers. See the COPYRIGHT |
| // file at the top-level directory of this distribution and at |
| // http://rust-lang.org/COPYRIGHT. |
| // |
| // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or |
| // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license |
| // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your |
| // option. This file may not be copied, modified, or distributed |
| // except according to those terms. |
| |
| |
| 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())); |
| } |
