1.1 --- a/lemon/smart_graph.h	Thu Jan 11 21:27:51 2007 +0000
     1.2 +++ b/lemon/smart_graph.h	Thu Jan 11 21:35:14 2007 +0000
     1.3 @@ -387,6 +387,10 @@
     1.4    public:
     1.5      
     1.6      typedef SmartUGraphBase Graph;
     1.7 +
     1.8 +    class Node;
     1.9 +    class Edge;
    1.10 +    class UEdge;
    1.11      
    1.12      class Node {
    1.13        friend class SmartUGraphBase;
    1.14 @@ -405,6 +409,7 @@
    1.15  
    1.16      class UEdge {
    1.17        friend class SmartUGraphBase;
    1.18 +      friend class SmartUGraphBase::Edge;
    1.19      protected:
    1.20  
    1.21        int id;