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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/coherence/coherence-subtyping.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/coherence/coherence-subtyping.rs')
-rw-r--r-- | src/test/ui/coherence/coherence-subtyping.rs | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/src/test/ui/coherence/coherence-subtyping.rs b/src/test/ui/coherence/coherence-subtyping.rs new file mode 100644 index 000000000..b3ed728a8 --- /dev/null +++ b/src/test/ui/coherence/coherence-subtyping.rs @@ -0,0 +1,20 @@ +// Test that two distinct impls which match subtypes of one another +// yield coherence errors (or not) depending on the variance. +// +// Note: This scenario is currently accepted, but as part of the +// universe transition (#56105) may eventually become an error. + +// check-pass + +trait TheTrait { + fn foo(&self) {} +} + +impl TheTrait for for<'a, 'b> fn(&'a u8, &'b u8) -> &'a u8 {} + +impl TheTrait for for<'a> fn(&'a u8, &'a u8) -> &'a u8 { + //~^ WARNING conflicting implementation + //~^^ WARNING this was previously accepted by the compiler but is being phased out +} + +fn main() {} |