core: add the `IntoIterator` trait

1 files changed, 9 insertions, 1 deletions

diff --git a/src/libcollections/enum_set.rs b/src/libcollections/enum_set.rs
index b542259eba0..a9e64a5c282 100644
--- a/src/libcollections/enum_set.rs
+++ b/src/libcollections/enum_set.rs
@@ -16,7 +16,7 @@
 use core::prelude::*;
 use core::fmt;
 use core::num::Int;
-use core::iter::FromIterator;
+use core::iter::{FromIterator, IntoIterator};
 use core::ops::{Sub, BitOr, BitAnd, BitXor};
 
 // FIXME(contentions): implement union family of methods? (general design may be wrong here)
@@ -256,6 +256,14 @@ impl<E:CLike> FromIterator<E> for EnumSet<E> {
     }
 }
 
+impl<'a, E> IntoIterator for &'a EnumSet<E> where E: CLike {
+    type Iter = Iter<E>;
+
+    fn into_iter(self) -> Iter<E> {
+        self.iter()
+    }
+}
+
 impl<E:CLike> Extend<E> for EnumSet<E> {
     fn extend<I: Iterator<Item=E>>(&mut self, mut iterator: I) {
         for element in iterator {