checkpoint

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

diff --git a/src/edu/berkeley/sbp/Element.java b/src/edu/berkeley/sbp/Element.java
index c94adbd..f88ce87 100644 (file)
--- a/src/edu/berkeley/sbp/Element.java
+++ b/src/edu/berkeley/sbp/Element.java
@@ -12,7 +12,7 @@ public abstract class Element {
 
     /** if this element always matches exactly one token, return a topology covering exactly those possible tokens, otherwise <tt>null</tt> */
     abstract Topology toAtom();
-
+    public Topology toAtom0() { return toAtom(); }
     Forest epsilonForm() { throw new Error("no epsilon form: " + this); }
     final boolean possiblyEpsilon(Walk.Cache cache) {
         Boolean ret = cache==null ? null : cache.possiblyEpsilon.get(this);