Implement CoerceUnsized for Unique

apasel422 · apasel422 · commit 04266daf779c · 2015-10-30T16:38:29.000-04:00
Closes rust-lang/rfcs#1343.
diff --git 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;

Original file line number	Diff line number	Diff line change
`@@ -532,6 +532,10 @@ impl<T: ?Sized> Unique<T> {`
`532`	`532`	`}`
`533`	`533`	`}`
`534`	`534`
	`535`	`+#[cfg(not(stage0))] // remove cfg after new snapshot`
	`536`	`+#[unstable(feature = "unique", issue = "27730")]`
	`537`	`+impl<T: ?Sized, U: ?Sized> CoerceUnsized<Unique<U>> for Unique<T> where T: Unsize<U> { }`
	`538`	`+`
`535`	`539`	`#[unstable(feature = "unique", issue= "27730")]`
`536`	`540`	`impl<T:?Sized> Deref for Unique<T> {`
`537`	`541`	`type Target = *mut T;`