1 files changed, 0 insertions, 77 deletions
diff --git a/src/util.rs b/src/util.rs
index 805acea6..693e26a8 100644
--- a/src/util.rs
+++ b/src/util.rs
@@ -24,80 +24,3 @@ pub mod thread {
         ::std::thread::Builder::new().name(name.into()).spawn(f).expect("thread spawn works")
     }
 }
-
-/// Types that can have their elements rotated
-pub trait Rotate {
-    fn rotate(&mut self, positions: isize);
-}
-
-impl<T> Rotate for [T] {
-    fn rotate(&mut self, positions: isize) {
-        // length is needed over and over
-        let len = self.len();
-
-        // Enforce positions in [0, len) and treat negative rotations as a
-        // posititive rotation of len - positions.
-        let positions = if positions > 0 {
-            positions as usize % len
-        } else {
-            len - (-positions as usize) % len
-        };
-
-        // If positions is 0 or the entire slice, it's a noop.
-        if positions == 0 || positions == len {
-            return;
-        }
-
-        self[..positions].reverse();
-        self[positions..].reverse();
-        self.reverse();
-    }
-}
-
-
-#[cfg(test)]
-mod tests {
-    use super::Rotate;
-
-    #[test]
-    fn rotate_forwards_works() {
-        let s = &mut [1, 2, 3, 4, 5];
-        s.rotate(1);
-        assert_eq!(&[2, 3, 4, 5, 1], s);
-    }
-
-    #[test]
-    fn rotate_backwards_works() {
-        let s = &mut [1, 2, 3, 4, 5];
-        s.rotate(-1);
-        assert_eq!(&[5, 1, 2, 3, 4], s);
-    }
-
-    #[test]
-    fn rotate_multiple_forwards() {
-        let s = &mut [1, 2, 3, 4, 5, 6, 7];
-        s.rotate(2);
-        assert_eq!(&[3, 4, 5, 6, 7, 1, 2], s);
-    }
-
-    #[test]
-    fn rotate_multiple_backwards() {
-        let s = &mut [1, 2, 3, 4, 5];
-        s.rotate(-3);
-        assert_eq!(&[3, 4, 5, 1, 2], s);
-    }
-
-    #[test]
-    fn rotate_forwards_overflow() {
-        let s = &mut [1, 2, 3, 4, 5];
-        s.rotate(6);
-        assert_eq!(&[2, 3, 4, 5, 1], s);
-    }
-
-    #[test]
-    fn rotate_backwards_overflow() {
-        let s = &mut [1, 2, 3, 4, 5];
-        s.rotate(-6);
-        assert_eq!(&[5, 1, 2, 3, 4], s);
-    }
-}