Implements Extend for EnumSet and LruCache

Part of #18424

1 files changed, 16 insertions, 0 deletions

diff --git a/src/libcollections/enum_set.rs b/src/libcollections/enum_set.rs
index 1acdaef9c91..7d2d298ee87 100644
--- a/src/libcollections/enum_set.rs
+++ b/src/libcollections/enum_set.rs
@@ -230,6 +230,22 @@ impl<E:CLike> Iterator<E> for Items<E> {
     }
 }
 
+impl<E:CLike> FromIterator<E> for EnumSet<E> {
+    fn from_iter<I:Iterator<E>>(iterator: I) -> EnumSet<E> {
+        let mut ret = EnumSet::new();
+        ret.extend(iterator);
+        ret
+    }
+}
+
+impl<E:CLike> Extend<E> for EnumSet<E> {
+    fn extend<I: Iterator<E>>(&mut self, mut iterator: I) {
+        for element in iterator {
+            self.insert(element);
+        }
+    }
+}
+
 #[cfg(test)]
 mod test {
     use std::prelude::*;