diff options
Diffstat (limited to 'src/test/ui/type-alias-impl-trait/issue-57700.rs')
-rw-r--r-- | src/test/ui/type-alias-impl-trait/issue-57700.rs | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/src/test/ui/type-alias-impl-trait/issue-57700.rs b/src/test/ui/type-alias-impl-trait/issue-57700.rs new file mode 100644 index 000000000..484589387 --- /dev/null +++ b/src/test/ui/type-alias-impl-trait/issue-57700.rs @@ -0,0 +1,21 @@ +#![feature(arbitrary_self_types)] +#![feature(type_alias_impl_trait)] + +use std::ops::Deref; + +trait Foo { + type Bar: Foo; + + fn foo(self: impl Deref<Target = Self>) -> Self::Bar; +} + +impl<C> Foo for C { + type Bar = impl Foo; + + fn foo(self: impl Deref<Target = Self>) -> Self::Bar { + self + //~^ Error type parameter `impl Deref<Target = Self>` is part of concrete type but not used in parameter list for the `impl Trait` type alias + } +} + +fn main() {} |