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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:19:13 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:19:13 +0000 |
commit | 218caa410aa38c29984be31a5229b9fa717560ee (patch) | |
tree | c54bd55eeb6e4c508940a30e94c0032fbd45d677 /tests/ui/rfc-1445-restrict-constants-in-patterns/cant-hide-behind-doubly-indirect-param.rs | |
parent | Releasing progress-linux version 1.67.1+dfsg1-1~progress7.99u1. (diff) | |
download | rustc-218caa410aa38c29984be31a5229b9fa717560ee.tar.xz rustc-218caa410aa38c29984be31a5229b9fa717560ee.zip |
Merging upstream version 1.68.2+dfsg1.
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'tests/ui/rfc-1445-restrict-constants-in-patterns/cant-hide-behind-doubly-indirect-param.rs')
-rw-r--r-- | tests/ui/rfc-1445-restrict-constants-in-patterns/cant-hide-behind-doubly-indirect-param.rs | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/tests/ui/rfc-1445-restrict-constants-in-patterns/cant-hide-behind-doubly-indirect-param.rs b/tests/ui/rfc-1445-restrict-constants-in-patterns/cant-hide-behind-doubly-indirect-param.rs new file mode 100644 index 000000000..1699dae46 --- /dev/null +++ b/tests/ui/rfc-1445-restrict-constants-in-patterns/cant-hide-behind-doubly-indirect-param.rs @@ -0,0 +1,29 @@ +// 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"); } + } +} |