src/test/ui/consts/const_in_pattern/issue-78057.rs

   1 #![deny(unreachable_patterns)]
   2
   3 #[derive(PartialEq)]
   4 struct Opaque(i32);
   5
   6 impl Eq for Opaque {}
   7
   8 const FOO: Opaque = Opaque(42);
   9
  10 fn main() {
  11     match FOO {
  12         FOO => {},
  13         //~^ ERROR must be annotated with `#[derive(PartialEq, Eq)]`
  14         _ => {}
  15         //~^ ERROR unreachable pattern
  16     }
  17 }