diff -r ae69f556b429 -r cb26a6250401 src/lemon/dijkstra.h
--- a/src/lemon/dijkstra.h	Sun Mar 06 21:13:24 2005 +0000
+++ b/src/lemon/dijkstra.h	Sun Mar 06 21:20:49 2005 +0000
@@ -729,6 +729,9 @@
 
     typedef DijkstraDefaultTraits<GR,LM> Base;
   protected:
+    /// Type of the nodes in the graph.
+    typedef typename Base::Graph::Node Node;
+
     /// Pointer to the underlying graph.
     void *_g;
     /// Pointer to the length map
@@ -740,10 +743,7 @@
     ///Pointer to the map of distances.
     void *_dist;
     ///Pointer to the source node.
-    void *_source;
-
-    /// Type of the nodes in the graph.
-    typedef typename Base::Graph::Node Node;
+    Node _source;
 
     public:
     /// Constructor.
@@ -751,7 +751,7 @@
     /// This constructor does not require parameters, therefore it initiates
     /// all of the attributes to default values (0, INVALID).
     DijkstraWizardBase() : _g(0), _length(0), _pred(0), _predNode(0),
-		       _dist(0), _source(0) {}
+		       _dist(0), _source(INVALID) {}
 
     /// Constructor.
     
@@ -763,7 +763,7 @@
     /// \param s is the initial value of  \ref _source
     DijkstraWizardBase(const GR &g,const LM &l, Node s=INVALID) :
       _g((void *)&g), _length((void *)&l), _pred(0), _predNode(0),
-		  _dist(0), _source((s==INVALID)?0:(void *)&s) {}
+		  _dist(0), _source(s) {}
 
   };
   
@@ -840,13 +840,13 @@
     ///The node can be given by the \ref source function.
     void run()
     {
-      if(Base::_source==0) throw UninitializedParameter();
+      if(Base::_source==INVALID) throw UninitializedParameter();
       Dijkstra<Graph,LengthMap,TR> 
 	Dij(*(Graph*)Base::_g,*(LengthMap*)Base::_length);
       if(Base::_pred) Dij.predMap(*(PredMap*)Base::_pred);
       if(Base::_predNode) Dij.predNodeMap(*(PredNodeMap*)Base::_predNode);
       if(Base::_dist) Dij.distMap(*(DistMap*)Base::_dist);
-      Dij.run(*(Node*)Base::_source);
+      Dij.run(Base::_source);
     }
 
     ///Runs Dijkstra algorithm from the given node.
@@ -855,7 +855,7 @@
     ///\param s is the given source.
     void run(Node s)
     {
-      Base::_source=(void *)&s;
+      Base::_source=s;
       run();
     }
 
@@ -926,7 +926,7 @@
     /// \param s is the source node.
     DijkstraWizard<TR> &source(Node s) 
     {
-      Base::_source=(void *)&s;
+      Base::_source=s;
       return *this;
     }