X-Git-Url: http://git.megacz.com/?p=sbp.git;a=blobdiff_plain;f=src%2Fedu%2Fberkeley%2Fsbp%2Fmeta%2FGrammarBuilder.java;h=2b1d7652fb2b87f72a7869137ba781d11b9a106b;hp=5e1d3d97ac538b38ec367c1d107784e838ab995e;hb=c2f1ce888172342cfd428355ee01326dd37c36eb;hpb=b910ad546f02d07664d32a70ce9acf6f049a64b1

diff --git a/src/edu/berkeley/sbp/meta/GrammarBuilder.java b/src/edu/berkeley/sbp/meta/GrammarBuilder.java
index 5e1d3d9..2b1d765 100644
--- a/src/edu/berkeley/sbp/meta/GrammarBuilder.java
+++ b/src/edu/berkeley/sbp/meta/GrammarBuilder.java
@@ -327,8 +327,6 @@ public class GrammarBuilder {
                 if (!drops[i])
                     if (idx==-1) idx = i;
                     else multiNonDrop = true;
-            if (tag==null && multiNonDrop)
-                throw new Error("multiple non-dropped elements in sequence: " + Sequence.create(els, ""));
             for(int i=0; i<elements.length; i++) {
                 if (!multiNonDrop && i==idx && tag!=null && elements[i] instanceof RepeatNode) {
                     els[i] = ((RepeatNode)elements[i]).build(cx, cnt, dropall, tag);
@@ -336,6 +334,8 @@ public class GrammarBuilder {
                 } else
                     els[i] = elements[i].build(cx, cnt, dropall);
             }
+            if (tag==null && multiNonDrop)
+                throw new RuntimeException("multiple non-dropped elements in sequence: " + Sequence.create(els, ""));
             if (!multiNonDrop) {
                 if (idx == -1) 
                     ret = tag==null