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 e4c0a78..6a20fdf 100644 (file)
--- a/src/edu/berkeley/sbp/misc/MetaGrammar.java
+++ b/src/edu/berkeley/sbp/misc/MetaGrammar.java
@@ -146,7 +146,7 @@ public class MetaGrammar extends StringWalker {
         else if ("=>".equals(head)) {
             PreSequence p = (PreSequence)walk(tree, 0);
             p.tag = string(tree.child(1));
-            return p.buildSequence(null, false, p.tag==null);
+            return p.buildSequence(null, false, "()".equals(p.tag));
         }
         else if ("[]".equals(head)) { PreSequence p = (PreSequence)walk(tree, 0); p.unwrap = true; return p; }
         else if ("psy".equals(head)) return (PreSequence)walk(tree, 0);