fix error caused when building error message

darcs-hash:20070326071354-5007d-20ff1a22552daf5cc0902845436ccf6cd56247ef.gz

diff --git a/src/edu/berkeley/sbp/meta/GrammarBuilder.java b/src/edu/berkeley/sbp/meta/GrammarBuilder.java
index 5e1d3d9..2b1d765 100644 (file)
--- 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