checkpoint

[sbp.git] / src / edu / berkeley / sbp / misc / MetaGrammar.java

diff --git a/src/edu/berkeley/sbp/misc/MetaGrammar.java b/src/edu/berkeley/sbp/misc/MetaGrammar.java
index b7dca25..28b306f 100644 (file)
--- a/src/edu/berkeley/sbp/misc/MetaGrammar.java
+++ b/src/edu/berkeley/sbp/misc/MetaGrammar.java
@@ -169,20 +169,15 @@ public class MetaGrammar extends StringWalker {
             PreSequence ret = new PreSequence(o3, s);
             ret.drops[o1.length] = o3.length>1;
             return ret;
-        } else if ("[".equals(head) || "[~".equals(head)) {
-            boolean positive = "[".equals(head);
+        } else if ("[".equals(head)) {
             Range[] rr = (Range[])walk(tree, 0);
-            Range.Set ret = positive ? new Range.Set() : new Range.Set(new Range(true, true));
-            if (rr != null)
-                for(Range r : rr)
-                    if (positive) ret.add(r);
-                    else          ret.remove(r);
+            Range.Set ret = new Range.Set();
+            if (rr!=null) for(Range r : rr) ret.add(r);
             return set(ret);
         }
         else return super.walk(tree);
     }
 
-
     public Object walk(String tag, Object[] argo) {
         if (argo.length==0) return super.walk(tag, argo);
         if (argo==null) return tag;