X-Git-Url: http://git.megacz.com/?p=sbp.git;a=blobdiff_plain;f=src%2Fedu%2Fberkeley%2Fsbp%2FUnion.java;h=9ac5e612065e9e6e2032f7dc59498fcaa2517197;hp=8780d9ea02df515179df4827dc41658897cc3681;hb=7fbee73b4dd985cb5b217ed297710c00fd9d7004;hpb=6b53048f4413f3c618acc3581d0b4f60a236a9bc

diff --git a/src/edu/berkeley/sbp/Union.java b/src/edu/berkeley/sbp/Union.java
index 8780d9e..9ac5e61 100644
--- a/src/edu/berkeley/sbp/Union.java
+++ b/src/edu/berkeley/sbp/Union.java
@@ -15,6 +15,7 @@ public class Union extends Element implements Iterable<Sequence> {
     private final List<Sequence> alternatives = new ArrayList<Sequence>();
 
     public Iterator<Sequence> iterator() { return alternatives.iterator(); }
+    public boolean contains(Sequence s) { return alternatives.contains(s); }
 
     Topology toAtom() {
         if (alternatives.size()==0) throw new RuntimeException("cannot build an Atom from a Union with no productions");