diff options
Diffstat (limited to 'tests/ui/generic-associated-types/issue-87258_a.rs')
-rw-r--r-- | tests/ui/generic-associated-types/issue-87258_a.rs | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/tests/ui/generic-associated-types/issue-87258_a.rs b/tests/ui/generic-associated-types/issue-87258_a.rs new file mode 100644 index 000000000..9ab683d3d --- /dev/null +++ b/tests/ui/generic-associated-types/issue-87258_a.rs @@ -0,0 +1,24 @@ +#![feature(type_alias_impl_trait)] + +// See https://github.com/rust-lang/rust/issues/87258#issuecomment-883293367 + +trait Trait1 {} + +struct Struct<'b>(&'b ()); + +impl<'d> Trait1 for Struct<'d> {} + +pub trait Trait2 { + type FooFuture<'a>: Trait1; + fn foo<'a>() -> Self::FooFuture<'a>; +} + +impl<'c, S: Trait2> Trait2 for &'c mut S { + type FooFuture<'a> = impl Trait1; + //~^ ERROR unconstrained opaque type + fn foo<'a>() -> Self::FooFuture<'a> { + Struct(unimplemented!()) + } +} + +fn main() {} |