1.1 --- a/lemon/grid_graph.h	Tue Nov 04 10:25:47 2008 +0000
     1.2 +++ b/lemon/grid_graph.h	Tue Nov 04 21:36:46 2008 +0100
     1.3 @@ -82,6 +82,7 @@
     1.4      }
     1.5  
     1.6      typedef True NodeNumTag;
     1.7 +    typedef True EdgeNumTag;
     1.8      typedef True ArcNumTag;
     1.9  
    1.10      int nodeNum() const { return _node_num; }
    1.11 @@ -127,6 +128,7 @@
    1.12      static Arc arcFromId(int id) { return Arc(id);}
    1.13  
    1.14      typedef True FindEdgeTag;
    1.15 +    typedef True FindArcTag;
    1.16  
    1.17      Edge findEdge(Node u, Node v, Edge prev = INVALID) const {
    1.18        if (prev != INVALID) return INVALID;