1 files changed, 15 insertions, 2 deletions
diff --git a/src/libcore/slice/mod.rs b/src/libcore/slice/mod.rs
index ca5cf04b1d4..fd91227343f 100644
--- a/src/libcore/slice/mod.rs
+++ b/src/libcore/slice/mod.rs
@@ -201,7 +201,10 @@ pub trait SliceExt {
     fn ends_with(&self, needle: &[Self::Item]) -> bool where Self::Item: PartialEq;
 
     #[unstable(feature = "slice_rotate", issue = "41891")]
-    fn rotate(&mut self, mid: usize);
+    fn rotate_left(&mut self, mid: usize);
+
+    #[unstable(feature = "slice_rotate", issue = "41891")]
+    fn rotate_right(&mut self, k: usize);
 
     #[stable(feature = "clone_from_slice", since = "1.7.0")]
     fn clone_from_slice(&mut self, src: &[Self::Item]) where Self::Item: Clone;
@@ -640,7 +643,7 @@ impl<T> SliceExt for [T] {
         self.binary_search_by(|p| p.cmp(x))
     }
 
-    fn rotate(&mut self, mid: usize) {
+    fn rotate_left(&mut self, mid: usize) {
         assert!(mid <= self.len());
         let k = self.len() - mid;
 
@@ -650,6 +653,16 @@ impl<T> SliceExt for [T] {
         }
     }
 
+    fn rotate_right(&mut self, k: usize) {
+        assert!(k <= self.len());
+        let mid = self.len() - k;
+
+        unsafe {
+            let p = self.as_mut_ptr();
+            rotate::ptr_rotate(mid, p.offset(mid as isize), k);
+        }
+    }
+
     #[inline]
     fn clone_from_slice(&mut self, src: &[T]) where T: Clone {
         assert!(self.len() == src.len(),