src/test/ui/structs-enums/tag.rs

   1 // run-pass
   2 #![allow(unused_parens)]
   3 #![allow(non_camel_case_types)]
   4
   5
   6 enum colour { red(isize, isize), green, }
   7
   8 impl PartialEq for colour {
   9     fn eq(&self, other: &colour) -> bool {
  10         match *self {
  11             colour::red(a0, b0) => {
  12                 match (*other) {
  13                     colour::red(a1, b1) => a0 == a1 && b0 == b1,
  14                     colour::green => false,
  15                 }
  16             }
  17             colour::green => {
  18                 match (*other) {
  19                     colour::red(..) => false,
  20                     colour::green => true
  21                 }
  22             }
  23         }
  24     }
  25     fn ne(&self, other: &colour) -> bool { !(*self).eq(other) }
  26 }
  27
  28 fn f() { let x = colour::red(1, 2); let y = colour::green; assert!((x != y)); }
  29
  30 pub fn main() { f(); }