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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:18:21 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:18:21 +0000 |
commit | 4e8199b572f2035b7749cba276ece3a26630d23e (patch) | |
tree | f09feeed6a0fe39d027b1908aa63ea6b35e4b631 /src/test/ui/type-alias-impl-trait/impl_trait_for_same_tait.rs | |
parent | Adding upstream version 1.66.0+dfsg1. (diff) | |
download | rustc-4e8199b572f2035b7749cba276ece3a26630d23e.tar.xz rustc-4e8199b572f2035b7749cba276ece3a26630d23e.zip |
Adding upstream version 1.67.1+dfsg1.upstream/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() {} |