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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:02:58 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:02:58 +0000 |
commit | 698f8c2f01ea549d77d7dc3338a12e04c11057b9 (patch) | |
tree | 173a775858bd501c378080a10dca74132f05bc50 /src/test/ui/consts/const_in_pattern/custom-eq-branch-warn.rs | |
parent | Initial commit. (diff) | |
download | rustc-698f8c2f01ea549d77d7dc3338a12e04c11057b9.tar.xz rustc-698f8c2f01ea549d77d7dc3338a12e04c11057b9.zip |
Adding upstream version 1.64.0+dfsg1.upstream/1.64.0+dfsg1
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'src/test/ui/consts/const_in_pattern/custom-eq-branch-warn.rs')
-rw-r--r-- | src/test/ui/consts/const_in_pattern/custom-eq-branch-warn.rs | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/src/test/ui/consts/const_in_pattern/custom-eq-branch-warn.rs b/src/test/ui/consts/const_in_pattern/custom-eq-branch-warn.rs new file mode 100644 index 000000000..856d20417 --- /dev/null +++ b/src/test/ui/consts/const_in_pattern/custom-eq-branch-warn.rs @@ -0,0 +1,36 @@ +// check-pass + +struct CustomEq; + +impl Eq for CustomEq {} +impl PartialEq for CustomEq { + fn eq(&self, _: &Self) -> bool { + false + } +} + +#[derive(PartialEq, Eq)] +enum Foo { + Bar, + Baz, + Qux(CustomEq), +} + +// We know that `BAR_BAZ` will always be `Foo::Bar` and thus eligible for structural matching, but +// dataflow will be more conservative. +const BAR_BAZ: Foo = if 42 == 42 { + Foo::Bar +} else { + Foo::Qux(CustomEq) +}; + +fn main() { + match Foo::Qux(CustomEq) { + BAR_BAZ => panic!(), + //~^ WARN must be annotated with `#[derive(PartialEq, Eq)]` + //~| WARN this was previously accepted + //~| NOTE see issue #73448 + //~| NOTE `#[warn(nontrivial_structural_match)]` on by default + _ => {} + } +} |