src/test/ui/lint/dead-code/lint-dead-code-5.rs

   1 #![allow(unused_variables)]
   2 #![deny(dead_code)]
   3
   4 enum Enum1 {
   5     Variant1(isize),
   6     Variant2 //~ ERROR: variant `Variant2` is never constructed
   7 }
   8
   9 enum Enum2 {
  10     Variant3(bool),
  11     #[allow(dead_code)]
  12     Variant4(isize),
  13     Variant5 { _x: isize }, //~ ERROR: variants `Variant5` and `Variant6` are never constructed
  14     Variant6(isize),
  15     _Variant7,
  16     Variant8 { _field: bool },
  17     Variant9,
  18     Variant10(usize)
  19 }
  20
  21 impl Enum2 {
  22     fn new_variant8() -> Enum2 {
  23         Self::Variant8 { _field: true }
  24     }
  25
  26     fn new_variant9() -> Enum2 {
  27         Self::Variant9
  28     }
  29
  30     fn new_variant10() -> Enum2 {
  31         Self::Variant10(10)
  32     }
  33 }
  34
  35 enum Enum3 { //~ ERROR: enum `Enum3` is never used
  36     Variant8,
  37     Variant9
  38 }
  39
  40 fn main() {
  41     let v = Enum1::Variant1(1);
  42     match v {
  43         Enum1::Variant1(_) => (),
  44         Enum1::Variant2 => ()
  45     }
  46     let x = Enum2::Variant3(true);
  47     let _ = Enum2::new_variant8();
  48     let _ = Enum2::new_variant9();
  49     let _ = Enum2::new_variant10();
  50 }