+// Copyright 2006 all rights reserved; see LICENSE file for BSD-style license
+
package edu.berkeley.sbp.misc;
import edu.berkeley.sbp.*;
import edu.berkeley.sbp.util.*;
public abstract class StringWalker extends TreeWalker<String> {
public void walk(String tag) { }
public Object walk(Tree<String> tree) {
- walk(tree.head());
+ Object o = tree.head();
+ if (!(o instanceof String)) o = null; /* FIXME */
+ walk((String)o);
return super.walk(tree);
}
public Object walk(String tag, Object[] tokens) {