Change default implementation of fold

diff --git a/gee/iterator.vala b/gee/iterator.vala
index 48d50b8..563a2dd 100644 (file)
--- a/gee/iterator.vala
+++ b/gee/iterator.vala
@@ -90,13 +90,12 @@ public interface Gee.Iterator<G> : Object {
         *
         * Operation moves the iterator to last element in iteration. If iterator
         * points at some element it will be included in iteration.
+        *
+        * Note: Default implementation uses {@link foreach}.
         */
        public virtual A fold<A> (FoldFunc<A, G> f, owned A seed)
        {
-               if (valid)
-                       seed = f (get (), (owned) seed);
-               while (next ())
-                       seed = f (get (), (owned) seed);
+               this.foreach ((item) => {seed = f (item, (owned) seed);});
                return (owned) seed;
        }