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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:19:03 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:19:03 +0000 |
commit | 64d98f8ee037282c35007b64c2649055c56af1db (patch) | |
tree | 5492bcf97fce41ee1c0b1cc2add283f3e66cdab0 /tests/ui/consts/const_in_pattern/reject_non_partial_eq.rs | |
parent | Adding debian version 1.67.1+dfsg1-1. (diff) | |
download | rustc-64d98f8ee037282c35007b64c2649055c56af1db.tar.xz rustc-64d98f8ee037282c35007b64c2649055c56af1db.zip |
Merging upstream version 1.68.2+dfsg1.
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'tests/ui/consts/const_in_pattern/reject_non_partial_eq.rs')
-rw-r--r-- | tests/ui/consts/const_in_pattern/reject_non_partial_eq.rs | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/tests/ui/consts/const_in_pattern/reject_non_partial_eq.rs b/tests/ui/consts/const_in_pattern/reject_non_partial_eq.rs new file mode 100644 index 000000000..a8216901c --- /dev/null +++ b/tests/ui/consts/const_in_pattern/reject_non_partial_eq.rs @@ -0,0 +1,32 @@ +// This test is illustrating the difference between how failing to derive +// `PartialEq` is handled compared to failing to implement it at all. + +// See also RFC 1445 + +#[derive(PartialEq, Eq)] +struct Structural(u32); + +struct NoPartialEq(u32); + +struct NoDerive(u32); + +// This impl makes NoDerive irreflexive. +impl PartialEq for NoDerive { fn eq(&self, _: &Self) -> bool { false } } + +impl Eq for NoDerive { } + +const NO_DERIVE_NONE: Option<NoDerive> = None; +const NO_PARTIAL_EQ_NONE: Option<NoPartialEq> = None; + +fn main() { + match None { + NO_DERIVE_NONE => println!("NO_DERIVE_NONE"), + _ => panic!("whoops"), + } + + match None { + NO_PARTIAL_EQ_NONE => println!("NO_PARTIAL_EQ_NONE"), + //~^ ERROR must be annotated with `#[derive(PartialEq, Eq)]` + _ => panic!("whoops"), + } +} |