diff options
Diffstat (limited to 'src/test/ui/rfc-2027-object-safe-for-dispatch/downcast-unsafe-trait-objects.rs')
-rw-r--r-- | src/test/ui/rfc-2027-object-safe-for-dispatch/downcast-unsafe-trait-objects.rs | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/src/test/ui/rfc-2027-object-safe-for-dispatch/downcast-unsafe-trait-objects.rs b/src/test/ui/rfc-2027-object-safe-for-dispatch/downcast-unsafe-trait-objects.rs new file mode 100644 index 000000000..fa04f4b12 --- /dev/null +++ b/src/test/ui/rfc-2027-object-safe-for-dispatch/downcast-unsafe-trait-objects.rs @@ -0,0 +1,23 @@ +// Check that we if we get ahold of an object unsafe trait +// object with auto traits and lifetimes, we can downcast it +// +// check-pass + +#![feature(object_safe_for_dispatch)] + +trait Trait: Sized {} + +fn downcast_auto(t: &(dyn Trait + Send)) -> &dyn Trait { + t +} + +fn downcast_lifetime<'a, 'b, 't>(t: &'a (dyn Trait + 't)) + -> &'b (dyn Trait + 't) +where + 'a: 'b, + 't: 'a + 'b, +{ + t +} + +fn main() {} |