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Nov 19th, 2018
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  1. #[derive(Debug)]
  2. enum E {
  3. A,
  4. B,
  5. C,
  6. D
  7. }
  8.  
  9. fn main() {
  10. let s = E::D;
  11. match s {
  12. E::A => println!("A"),
  13. E::B => println!("C"),
  14. unexpected => println!("unexpected! {:?}", unexpected) // ここを _ にすると println!の引数として使えなくなる
  15. }
  16. }
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