---

yaml
---
r: 212457
b: refs/heads/master
c: cf0edd0
h: refs/heads/master
i:
  212455: 76196c4
v: v3

Author: bors

[refs]

@@ -1,5 +1,5 @@
 ---
-refs/heads/master: 4a2d4d3eb9ee6ce349503285527db3bc81bdbdf7
+refs/heads/master: cf0edd0ad941a4a569e8afb17494cb1eb53373e9
 refs/heads/snap-stage1: e33de59e47c5076a89eadeb38f4934f58a3618a6
 refs/heads/snap-stage3: ba0e1cd8147d452c356aacb29fb87568ca26f111
 refs/heads/try: 1864973ae17213c5a58c4dd3f9af6d1b6c7d2e05

trunk/src/libcollections/borrow.rs

@@ -21,7 +21,7 @@ use core::ops::Deref;
 use core::option::Option;
 
 use fmt;
-use alloc::{rc, arc};
+use alloc::{boxed, rc, arc};
 
 use self::Cow::*;
 
@@ -116,6 +116,14 @@ impl<'a, T: ?Sized> BorrowMut<T> for &'a mut T {
     fn borrow_mut(&mut self) -> &mut T { &mut **self }
 }
 
+impl<T: ?Sized> Borrow<T> for boxed::Box<T> {
+    fn borrow(&self) -> &T { &**self }
+}
+
+impl<T: ?Sized> BorrowMut<T> for boxed::Box<T> {
+    fn borrow_mut(&mut self) -> &mut T { &mut **self }
+}
+
 impl<T: ?Sized> Borrow<T> for rc::Rc<T> {
     fn borrow(&self) -> &T { &**self }
 }