Implement CoerceUnsized for Unique

Closes rust-lang/rfcs#1343.
2015-10-30 16:38:29 -04:00 · 2015-10-30 16:38:29 -04:00 · 04266daf77
commit 04266daf77
parent 2aa9f7d391
1 changed files with 4 additions and 0 deletions
--- a/src/libcore/ptr.rs
+++ b/src/libcore/ptr.rs
@ -532,6 +532,10 @@ impl<T: ?Sized> Unique<T> {
    }
 }

+#[cfg(not(stage0))] // remove cfg after new snapshot
+#[unstable(feature = "unique", issue = "27730")]
+impl<T: ?Sized, U: ?Sized> CoerceUnsized<Unique<U>> for Unique<T> where T: Unsize<U> { }
+
 #[unstable(feature = "unique", issue= "27730")]
 impl<T:?Sized> Deref for Unique<T> {
    type Target = *mut T;