X-Git-Url: http://git.megacz.com/?p=sbp.git;a=blobdiff_plain;f=src%2Fedu%2Fberkeley%2Fsbp%2Fchr%2FCharParser.java;h=9bdadbc1e90697c54588c3d7b292287b1e5fd9bc;hp=8630161d8feefb81f4cb56bfb004174c6f9fb48b;hb=82f9b8d4a2fadb14cb004e5cc9f14944458f2e6c;hpb=189d68c64f7aaec90b7cdef0fb2c358fe4f0dd21

diff --git a/src/edu/berkeley/sbp/chr/CharParser.java b/src/edu/berkeley/sbp/chr/CharParser.java
index 8630161..9bdadbc 100644
--- a/src/edu/berkeley/sbp/chr/CharParser.java
+++ b/src/edu/berkeley/sbp/chr/CharParser.java
@@ -15,8 +15,13 @@ public class CharParser extends Parser<Character,String> {
 
     public CharParser(Union u) { super(u, new CharTopology()); }
 
-    public Forest<String> shiftToken(Location oldloc, Character ct, Location newloc) {
-        return Forest.create(new Input.Region(oldloc, newloc), ct.toString(), null, false);
+    private Location oldloc;
+
+    public Forest<String> shiftToken(Character ct, Location newloc) {
+        if (oldloc==null) oldloc = newloc;
+        Forest<String> ret = Forest.create(oldloc.createRegion(newloc), ct.toString(), null, false);
+        oldloc = newloc;
+        return ret;
     }
 
 }