warning: variant is never constructed: `B`
  --> $DIR/const-and-self.rs:33:5
   |
LL |     B,
   |     ^
   |
note: the lint level is defined here
  --> $DIR/const-and-self.rs:3:9
   |
LL | #![warn(dead_code)]
   |         ^^^^^^^^^

warning: variant is never constructed: `C`
  --> $DIR/const-and-self.rs:34:5
   |
LL |     C,
   |     ^

warning: 2 warnings emitted