tentative checkpoint

[sbp.git] / src / edu / berkeley / sbp / Forest.java

diff --git a/src/edu/berkeley/sbp/Forest.java b/src/edu/berkeley/sbp/Forest.java
index 3790562..1b92a76 100644 (file)
--- a/src/edu/berkeley/sbp/Forest.java
+++ b/src/edu/berkeley/sbp/Forest.java
@@ -159,6 +159,7 @@ public abstract class Forest<T> /*extends PrintableTree<Forest.MyBody<T>>*/
      *  viewed, it becomes immutable
      */
     static class Ref<T> extends Forest<T> {
+        public HashSet<GSS.Phase.Node> parents = new HashSet<GSS.Phase.Node>();
         public boolean ambiguous() {
             if (hp.size()==0) return false;
             if (hp.size()==1) return hp.iterator().next().ambiguous();