TreeZipper.delete flipping lefts and rights.

runarorama · runarorama · commit 93a500b2912c · 2011-09-28T09:52:50.000-04:00
diff --git a/core/src/main/java/fj/data/TreeZipper.java b/core/src/main/java/fj/data/TreeZipper.java
@@ -550,9 +550,9 @@ public Option<TreeZipper<A>> insertDownAt(final int n, final Tree<A> t) {
   public Option<TreeZipper<A>> delete() {
     Option<TreeZipper<A>> r = none();
     if (rights.isNotEmpty())
-      r = some(treeZipper(rights.head(), rights.tail()._1(), lefts, parents));
+      r = some(treeZipper(rights.head(), lefts, rights.tail()._1(), parents));
     else if (lefts.isNotEmpty())
-      r = some(treeZipper(lefts.head(), rights, lefts.tail()._1(), parents));
+      r = some(treeZipper(lefts.head(), lefts.tail()._1(), rights, parents));
     else for (final TreeZipper<A> loc : parent())
         r = some(loc.modifyTree(new F<Tree<A>, Tree<A>>() {
           public Tree<A> f(final Tree<A> t) {
