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 ac0e55e..9dd3e62 100644 (file)
--- a/src/edu/berkeley/sbp/misc/MetaGrammar.java
+++ b/src/edu/berkeley/sbp/misc/MetaGrammar.java
@@ -123,7 +123,7 @@ public class MetaGrammar extends StringWalker {
         else if ("psylr".equals(head)) throw new Error("not supported");
         else if ("/".equals(head)) return ((PreSequence)walk(tree, 0)).sparse((Element)walk(tree, 1));
         else if ("~".equals(head))
-            return new Atom.Invert(new Atom.Infer((Element)walk(tree, 0)));
+            return new Atom.Hack(new Atom.Invert(new Atom.Infer((Element)walk(tree, 0))));
         else if ("ps".equals(head)) return new PreSequence((Element[])walk(tree, 0));
         else if ("ps".equals(head)) return new PreSequence((Element[])walk(tree, 0));
         else if ("qprod".equals(head)) {