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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/coherence/coherence-impl-trait-for-trait.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/coherence/coherence-impl-trait-for-trait.rs')
-rw-r--r-- | tests/ui/coherence/coherence-impl-trait-for-trait.rs | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/tests/ui/coherence/coherence-impl-trait-for-trait.rs b/tests/ui/coherence/coherence-impl-trait-for-trait.rs new file mode 100644 index 000000000..195a37f15 --- /dev/null +++ b/tests/ui/coherence/coherence-impl-trait-for-trait.rs @@ -0,0 +1,20 @@ +// Test that we give suitable error messages when the user attempts to +// impl a trait `Trait` for its own object type. + +trait Foo { fn dummy(&self) { } } +trait Bar: Foo { } +trait Baz: Bar { } + +// Supertraits of Baz are not legal: +impl Foo for dyn Baz { } +//~^ ERROR E0371 +impl Bar for dyn Baz { } +//~^ ERROR E0371 +impl Baz for dyn Baz { } +//~^ ERROR E0371 + +// But other random traits are: +trait Other { } +impl Other for dyn Baz { } // OK, Other not a supertrait of Baz + +fn main() { } |