Add standard stack manipulation functions
diff --git a/Parser.h b/Parser.h
index 5d87a2b..102a3c3 100644
--- a/Parser.h
+++ b/Parser.h
@@ -76,6 +76,9 @@
     ParseResult parseMany(QList<T> *list);
 
     template <typename T>
+    ParseResult parseString(QList<T> *list);
+
+    template <typename T>
     ParseResult parseOne(T *node);
 
     ParseResult parseSentence(Sentence *sentence);