stdlib sources re-added

libraries/stdlib/src/Iterators.kt

@@ -0,0 +1,26 @@
+package kotlin.util
+
+import java.util.*
+import java.util.Iterator
+
+/** Add iterated elements to given container */
+fun <T,U: Collection<in T>> java.util.Iterator<T>.to(container: U) : U {
+    while(hasNext())
+        container.add(next())
+    return container
+}
+
+/** Add iterated elements to java.util.ArrayList */
+inline fun <T> java.util.Iterator<T>.toArrayList() = to(ArrayList<T>())
+
+/** Add iterated elements to java.util.LinkedList */
+inline fun <T> java.util.Iterator<T>.toLinkedList() = to(LinkedList<T>())
+
+/** Add iterated elements to java.util.HashSet */
+inline fun <T> java.util.Iterator<T>.toHashSet() = to(HashSet<T>())
+
+/** Add iterated elements to java.util.LinkedHashSet */
+inline fun <T> java.util.Iterator<T>.toLinkedHashSet() = to(LinkedHashSet<T>())
+
+/** Add iterated elements to java.util.TreeSet */
+inline fun <T> java.util.Iterator<T>.toTreeSet() = to(TreeSet<T>())