Deprecate MaybeOwned[Vector] in favor of Cow

1 files changed, 8 insertions, 0 deletions

diff --git a/src/libcollections/hash/mod.rs b/src/libcollections/hash/mod.rs
index b1ff3da947b..4173ffc5d2f 100644
--- a/src/libcollections/hash/mod.rs
+++ b/src/libcollections/hash/mod.rs
@@ -67,6 +67,7 @@ use core::prelude::*;
 
 use alloc::boxed::Box;
 use alloc::rc::Rc;
+use core::borrow::{Cow, ToOwned};
 use core::intrinsics::TypeId;
 use core::mem;
 use core::num::Int;
@@ -284,6 +285,13 @@ impl<S: Writer, T: Hash<S>, U: Hash<S>> Hash<S> for Result<T, U> {
     }
 }
 
+impl<'a, T, Sized? B, S> Hash<S> for Cow<'a, T, B> where B: Hash<S> + ToOwned<T> {
+    #[inline]
+    fn hash(&self, state: &mut S) {
+        Hash::hash(&**self, state)
+    }
+}
+
 //////////////////////////////////////////////////////////////////////////////
 
 #[cfg(test)]