Add new_uninit and assume_init on Box, Rc, and Arc

1 files changed, 8 insertions, 0 deletions

diff --git a/src/libcore/ptr/unique.rs b/src/libcore/ptr/unique.rs
index f0d011fe6b2..a739f3b6022 100644
--- a/src/libcore/ptr/unique.rs
+++ b/src/libcore/ptr/unique.rs
@@ -122,6 +122,14 @@ impl<T: ?Sized> Unique<T> {
     pub unsafe fn as_mut(&mut self) -> &mut T {
         &mut *self.as_ptr()
     }
+
+    /// Cast to a pointer of another type
+    #[inline]
+    pub const fn cast<U>(self) -> Unique<U> {
+        unsafe {
+            Unique::new_unchecked(self.as_ptr() as *mut U)
+        }
+    }
 }
 
 #[unstable(feature = "ptr_internals", issue = "0")]