mirror of
https://github.com/rust-lang/rust.git
synced 2024-11-01 06:51:58 +00:00
30 lines
1.0 KiB
Rust
30 lines
1.0 KiB
Rust
// 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)]
|
|
// run-pass
|
|
|
|
struct NoDerive(#[allow(unused_tuple_struct_fields)] 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<'a, T>(&'a &'a T);
|
|
|
|
const WRAP_DOUBLY_INDIRECT_PARAM: & &WrapParam<NoDerive> = & &WrapParam(& & NoDerive(0));
|
|
|
|
fn main() {
|
|
match WRAP_DOUBLY_INDIRECT_PARAM {
|
|
WRAP_DOUBLY_INDIRECT_PARAM => { panic!("WRAP_DOUBLY_INDIRECT_PARAM matched itself"); }
|
|
//~^ WARN must be annotated with `#[derive(PartialEq, Eq)]`
|
|
//~| WARN this was previously accepted
|
|
_ => { println!("WRAP_DOUBLY_INDIRECT_PARAM correctly did not match itself"); }
|
|
}
|
|
}
|