rust/tests/ui/traits/trait-upcasting/normalization.rs
Urgau 4c2d6de70e Stabilize RFC3324 dyn upcasting coercion
Aka trait_upcasting feature.

And also adjust the `deref_into_dyn_supertrait` lint.
2023-11-22 13:56:36 +01:00

19 lines
306 B
Rust

// check-pass
// issue: 114113
// revisions: current next
//[next] compile-flags: -Ztrait-solver=next
trait Mirror {
type Assoc;
}
impl<T> Mirror for T {
type Assoc = T;
}
trait Bar<T> {}
trait Foo<T>: Bar<<T as Mirror>::Assoc> {}
fn upcast<T>(x: &dyn Foo<T>) -> &dyn Bar<T> { x }
fn main() {}