1 files changed, 5 insertions, 9 deletions
diff --git a/pyparsing.py b/pyparsing.py
index 3befc7c..4a79904 100644
--- a/pyparsing.py
+++ b/pyparsing.py
@@ -4636,18 +4636,18 @@ class Forward(ParseElementEnhance):
     def __str__( self ):
         if hasattr(self,"name"):
             return self.name
-        return self.__class__.__name__ + ": ..."
 
-        # stubbed out for now - creates awful memory and perf issues
-        self._revertClass = self.__class__
-        self.__class__ = _ForwardNoRecurse
+        # Avoid infinite recursion by setting a temporary name
+        self.name = self.__class__.__name__ + ": ..."
+
+        # Use the string representation of main expression.
         try:
             if self.expr is not None:
                 retString = _ustr(self.expr)
             else:
                 retString = "None"
         finally:
-            self.__class__ = self._revertClass
+            del self.name
         return self.__class__.__name__ + ": " + retString
 
     def copy(self):
@@ -4658,10 +4658,6 @@ class Forward(ParseElementEnhance):
             ret <<= self
             return ret
 
-class _ForwardNoRecurse(Forward):
-    def __str__( self ):
-        return "..."
-
 class TokenConverter(ParseElementEnhance):
     """
     Abstract subclass of :class:`ParseExpression`, for converting parsed results.