1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
|
// 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
#![warn(indirect_structural_match)]
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 must be annotated with `#[derive(PartialEq)]`
_ => { println!("WRAP_DIRECT_PARAM did not match itself"); }
}
}
|
