std: Stabilize the IntoIterator trait

Now that the necessary associated types exist for the `IntoIterator` trait this
commit stabilizes the trait as-is as well as all existing implementations.

1 files changed, 1 insertions, 0 deletions

diff --git a/src/libcollections/enum_set.rs b/src/libcollections/enum_set.rs
index 5c37be188fe..ec30933bd2e 100644
--- a/src/libcollections/enum_set.rs
+++ b/src/libcollections/enum_set.rs
@@ -268,6 +268,7 @@ impl<'a, E> IntoIterator for &'a EnumSet<E> where E: CLike {
 }
 
 #[cfg(not(stage0))]  // NOTE(stage0): remove cfg after a snapshot
+#[stable(feature = "rust1", since = "1.0.0")]
 impl<'a, E> IntoIterator for &'a EnumSet<E> where E: CLike {
     type Item = E;
     type IntoIter = Iter<E>;