X-Git-Url: http://git.megacz.com/?p=sbp.git;a=blobdiff_plain;f=src%2Fedu%2Fberkeley%2Fsbp%2FElement.java;h=7eb6a59b53f170689fdc395a8fae574165d38008;hp=896540e904f0868bfe1dd4f68ee3fa630ecde6b9;hb=2c1c0293545f3d12c23220fd05c663e6aa3f3de1;hpb=82f9b8d4a2fadb14cb004e5cc9f14944458f2e6c

diff --git a/src/edu/berkeley/sbp/Element.java b/src/edu/berkeley/sbp/Element.java
index 896540e..7eb6a59 100644
--- a/src/edu/berkeley/sbp/Element.java
+++ b/src/edu/berkeley/sbp/Element.java
@@ -7,8 +7,8 @@ import java.util.*;
 import java.lang.reflect.*;
 import java.lang.ref.*;
 
-/** the root superclass for all components of the grammar (terminals, nonterminals, literals, etc) */
-public abstract class Element {
+/** <font color=green>the root superclass for all components of the grammar (terminals, nonterminals, literals, etc)</font> */
+public abstract class Element implements SequenceOrElement {
 
     /** sorry, you can't make up new, custom elements */
     Element() { }
@@ -16,6 +16,6 @@ public abstract class Element {
     abstract StringBuffer toString(StringBuffer sb);
 
     /** returns the Forest resulting from matching this element against the empty string */
-    Forest epsilonForm() { throw new Error("element " + this + " has no epsilon form"); }
+    Forest<?> epsilonForm() { throw new Error("element " + this + " has no epsilon form"); }
 
 }