| // This is part of a set of tests exploring the different ways a |
| // structural-match ADT might try to hold a |
| // non-structural-match in hidden manner that lets matches |
| // through that we had intended to reject. |
| // |
| // See discussion on rust-lang/rust#62307 and rust-lang/rust#62339 |
| struct NoDerive(i32); |
| |
| // This impl makes NoDerive irreflexive. |
| impl PartialEq for NoDerive { fn eq(&self, _: &Self) -> bool { false } } |
| |
| impl Eq for NoDerive { } |
| |
| #[derive(PartialEq, Eq)] |
| struct WrapParam<T>(T); |
| |
| const WRAP_DIRECT_PARAM: WrapParam<NoDerive> = WrapParam(NoDerive(0)); |
| |
| fn main() { |
| match WRAP_DIRECT_PARAM { |
| WRAP_DIRECT_PARAM => { panic!("WRAP_DIRECT_PARAM matched itself"); } |
| //~^ ERROR constant of non-structural type `NoDerive` in a pattern |
| _ => { println!("WRAP_DIRECT_PARAM did not match itself"); } |
| } |
| } |
