diff -r 46a6311ceffa -r 4dd3eb348641 lemon/smart_graph.h
--- a/lemon/smart_graph.h	Thu Jan 11 21:27:51 2007 +0000
+++ b/lemon/smart_graph.h	Thu Jan 11 21:35:14 2007 +0000
@@ -387,6 +387,10 @@
   public:
     
     typedef SmartUGraphBase Graph;
+
+    class Node;
+    class Edge;
+    class UEdge;
     
     class Node {
       friend class SmartUGraphBase;
@@ -405,6 +409,7 @@
 
     class UEdge {
       friend class SmartUGraphBase;
+      friend class SmartUGraphBase::Edge;
     protected:
 
       int id;