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1 | // Copyright 2012 The Rust Project Developers. See the COPYRIGHT |
2 | // file at the top-level directory of this distribution and at | |
3 | // http://rust-lang.org/COPYRIGHT. | |
4 | // | |
5 | // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or | |
6 | // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license | |
7 | // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your | |
8 | // option. This file may not be copied, modified, or distributed | |
9 | // except according to those terms. | |
10 | ||
c34b1796 | 11 | |
223e47cc LB |
12 | enum pattern { tabby, tortoiseshell, calico } |
13 | enum breed { beagle, rottweiler, pug } | |
1a4d82fc | 14 | type name = String; |
223e47cc LB |
15 | enum ear_kind { lop, upright } |
16 | enum animal { cat(pattern), dog(breed), rabbit(name, ear_kind), tiger } | |
17 | ||
1a4d82fc | 18 | fn noise(a: animal) -> Option<String> { |
223e47cc | 19 | match a { |
1a4d82fc JJ |
20 | animal::cat(..) => { Some("meow".to_string()) } |
21 | animal::dog(..) => { Some("woof".to_string()) } | |
22 | animal::rabbit(..) => { None } | |
92a42be0 | 23 | animal::tiger => { Some("roar".to_string()) } |
223e47cc LB |
24 | } |
25 | } | |
26 | ||
27 | pub fn main() { | |
1a4d82fc JJ |
28 | assert_eq!(noise(animal::cat(pattern::tabby)), Some("meow".to_string())); |
29 | assert_eq!(noise(animal::dog(breed::pug)), Some("woof".to_string())); | |
30 | assert_eq!(noise(animal::rabbit("Hilbert".to_string(), ear_kind::upright)), None); | |
31 | assert_eq!(noise(animal::tiger), Some("roar".to_string())); | |
223e47cc | 32 | } |