X-Git-Url: http://git.megacz.com/?p=sbp.git;a=blobdiff_plain;f=src%2Fedu%2Fberkeley%2Fsbp%2FUnion.java;fp=src%2Fedu%2Fberkeley%2Fsbp%2FUnion.java;h=d52c6e96209c53ebffa76640995dc33e126635b0;hp=77a158181a309578ca9e6354ca54db520370d0d6;hb=2c1c0293545f3d12c23220fd05c663e6aa3f3de1;hpb=111166986ad83b54d0cae5c03c2304d23e332f29

diff --git a/src/edu/berkeley/sbp/Union.java b/src/edu/berkeley/sbp/Union.java
index 77a1581..d52c6e9 100644
--- a/src/edu/berkeley/sbp/Union.java
+++ b/src/edu/berkeley/sbp/Union.java
@@ -52,12 +52,20 @@ public class Union extends Element implements Iterable<Sequence> {
 
     /** adds an alternative */
     public void add(Sequence s) {
+        /*
+          FIXME
         if (viewed)
-            throw new RuntimeException("attempt to add a Sequence to a Union that has already been examined");
+            throw new RuntimeException("attempt to add a Sequence to a Union that has already been examined:\n  "+this);
+        */
         if (alternatives.contains(s)) return;
         alternatives.add(s);
     }
 
+    /** adds a one-element sequence */
+    public void add(Element e) {
+        add(Sequence.create(e));
+    }
+
 
     // Epsilon Form //////////////////////////////////////////////////////////////////////////////