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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:18:25 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:18:25 +0000 |
commit | 5363f350887b1e5b5dd21a86f88c8af9d7fea6da (patch) | |
tree | 35ca005eb6e0e9a1ba3bb5dbc033209ad445dc17 /src/test/ui/type-alias-impl-trait/impl_trait_for_same_tait.rs | |
parent | Adding debian version 1.66.0+dfsg1-1. (diff) | |
download | rustc-5363f350887b1e5b5dd21a86f88c8af9d7fea6da.tar.xz rustc-5363f350887b1e5b5dd21a86f88c8af9d7fea6da.zip |
Merging upstream version 1.67.1+dfsg1.
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'src/test/ui/type-alias-impl-trait/impl_trait_for_same_tait.rs')
-rw-r--r-- | src/test/ui/type-alias-impl-trait/impl_trait_for_same_tait.rs | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/src/test/ui/type-alias-impl-trait/impl_trait_for_same_tait.rs b/src/test/ui/type-alias-impl-trait/impl_trait_for_same_tait.rs new file mode 100644 index 000000000..3f1a9d12b --- /dev/null +++ b/src/test/ui/type-alias-impl-trait/impl_trait_for_same_tait.rs @@ -0,0 +1,33 @@ +#![feature(type_alias_impl_trait)] + +trait Foo {} +impl Foo for () {} +impl Foo for i32 {} + +type Bar<T: Foo> = impl std::fmt::Debug; +fn defining_use<T: Foo>() -> Bar<T> { + 42 +} + +trait Bop {} + +impl Bop for Bar<()> {} + +// If the hidden type is the same, this is effectively a second impl for the same type. +impl Bop for Bar<i32> {} +//~^ ERROR conflicting implementations + +type Barr = impl std::fmt::Debug; +fn defining_use2() -> Barr { + 42 +} + +// Even completely different opaque types must conflict. +impl Bop for Barr {} +//~^ ERROR conflicting implementations + +// And obviously the hidden type must conflict, too. +impl Bop for i32 {} +//~^ ERROR conflicting implementations + +fn main() {} |