+// Copyright 2006-2007 all rights reserved; see LICENSE file for BSD-style license
+
package edu.berkeley.sbp.misc;
import edu.berkeley.sbp.*;
import edu.berkeley.sbp.util.*;
import java.lang.reflect.*;
public abstract class StringWalker extends TreeWalker<String> {
- public Object walk(Tree<String> tree) { return super.walk(tree); }
+ public void walk(String tag) { }
+ public Object walk(Tree<String> tree) {
+ 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) {
if (tokens.length==0) return tag;
if (tag==null) return null;