X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;f=src%2Fedu%2Fberkeley%2Fsbp%2Fmeta%2FMetaGrammarBindings.java;h=1a60610cac41aaab4f0556079d329b3d7984e0d1;hb=a2008a0c57702f49ed7f8be682e4e29484fded38;hp=b0b86da4b86b33be7aaaeed99290b0d3029eada2;hpb=fb8694140dd9736855795e64a9bd4c3d50f7f2ea;p=sbp.git

diff --git a/src/edu/berkeley/sbp/meta/MetaGrammarBindings.java b/src/edu/berkeley/sbp/meta/MetaGrammarBindings.java
index b0b86da..1a60610 100644
--- a/src/edu/berkeley/sbp/meta/MetaGrammarBindings.java
+++ b/src/edu/berkeley/sbp/meta/MetaGrammarBindings.java
@@ -225,9 +225,9 @@ public class MetaGrammarBindings extends AnnotationGrammarBindings {
         }
         public Sequence build(Context cx, Union u, NonTerminalNode cnt) {
             Sequence ret = build0(cx, cnt);
-            for(Seq s : and) { Sequence dork = s.build(cx, u, cnt); ret = ret.and(dork); }
-            for(Seq s : not) { Sequence dork = s.build(cx, u, cnt); ret = ret.andnot(dork); }
-            u.add(ret);
+            for(Seq s : and) { Sequence dork = s.build(cx, null, cnt); ret = ret.and(dork); }
+            for(Seq s : not) { Sequence dork = s.build(cx, null, cnt); ret = ret.andnot(dork); }
+            if (u!=null) u.add(ret);
             return ret;
         }
         public Sequence build0(Context cx, NonTerminalNode cnt) {