src/test/run-pass/issue-1701.rs

   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
  11 enum pattern { tabby, tortoiseshell, calico }
  12 enum breed { beagle, rottweiler, pug }
  13 type name = String;
  14 enum ear_kind { lop, upright }
  15 enum animal { cat(pattern), dog(breed), rabbit(name, ear_kind), tiger }
  16
  17 fn noise(a: animal) -> Option<String> {
  18     match a {
  19       animal::cat(..)    => { Some("meow".to_string()) }
  20       animal::dog(..)    => { Some("woof".to_string()) }
  21       animal::rabbit(..) => { None }
  22       animal::tiger(..)  => { Some("roar".to_string()) }
  23     }
  24 }
  25
  26 pub fn main() {
  27     assert_eq!(noise(animal::cat(pattern::tabby)), Some("meow".to_string()));
  28     assert_eq!(noise(animal::dog(breed::pug)), Some("woof".to_string()));
  29     assert_eq!(noise(animal::rabbit("Hilbert".to_string(), ear_kind::upright)), None);
  30     assert_eq!(noise(animal::tiger), Some("roar".to_string()));
  31 }