107       bool operator==(Edge n) const { return true; } | 
   107       bool operator==(Edge n) const { return true; } | 
   108       bool operator!=(Edge n) const { return true; } | 
   108       bool operator!=(Edge n) const { return true; } | 
   109       bool operator<(Edge n) const { return true; } | 
   109       bool operator<(Edge n) const { return true; } | 
   110     };  | 
   110     };  | 
   111       | 
   111       | 
   112     /// This iterator goes trough the outgoing edges of a node.  | 
         | 
   113   | 
         | 
   114     /// This iterator goes trough the \e outgoing edges of a certain node  | 
         | 
   115     /// of a graph.  | 
         | 
   116     /// Its usage is quite simple, for example you can count the number  | 
         | 
   117     /// of outgoing edges of a node \c n  | 
         | 
   118     /// in graph \c G of type \c Graph as follows.  | 
         | 
   119     /// \code  | 
         | 
   120     ///int count=0;  | 
         | 
   121     ///for(Graph::OutEdgeIt e(G,n);G.valid(e);G.next(e)) count++;  | 
         | 
   122     /// \endcode  | 
         | 
   123       | 
         | 
   124     class OutEdgeIt : public Edge { | 
         | 
   125     public:  | 
         | 
   126       /// @warning The default constructor sets the iterator  | 
         | 
   127       /// to an undefined value.  | 
         | 
   128       OutEdgeIt() {} | 
         | 
   129       /// Initialize the iterator to be invalid  | 
         | 
   130       OutEdgeIt(Invalid) {} | 
         | 
   131       /// This constructor sets the iterator to first outgoing edge.  | 
         | 
   132       | 
         | 
   133       /// This constructor set the iterator to the first outgoing edge of  | 
         | 
   134       /// node  | 
         | 
   135       ///@param n the node  | 
         | 
   136       ///@param G the graph  | 
         | 
   137       OutEdgeIt(const GraphSkeleturo & G, Node n) {} | 
         | 
   138     };  | 
         | 
   139   | 
         | 
   140     /// This iterator goes trough the incoming edges of a node.  | 
         | 
   141   | 
         | 
   142     /// This iterator goes trough the \e incoming edges of a certain node  | 
         | 
   143     /// of a graph.  | 
         | 
   144     /// Its usage is quite simple, for example you can count the number  | 
         | 
   145     /// of outgoing edges of a node \c n  | 
         | 
   146     /// in graph \c G of type \c Graph as follows.  | 
         | 
   147     /// \code  | 
         | 
   148     ///int count=0;  | 
         | 
   149     ///for(Graph::InEdgeIt e(G,n);G.valid(e);G.next(e)) count++;  | 
         | 
   150     /// \endcode  | 
         | 
   151   | 
         | 
   152     class InEdgeIt : public Edge { | 
         | 
   153     public:  | 
         | 
   154       /// @warning The default constructor sets the iterator  | 
         | 
   155       /// to an undefined value.  | 
         | 
   156       InEdgeIt() {} | 
         | 
   157       /// Initialize the iterator to be invalid  | 
         | 
   158       InEdgeIt(Invalid) {} | 
         | 
   159       InEdgeIt(const GraphSkeleturo &, Node) {}     | 
         | 
   160     };  | 
         | 
   161     //  class SymEdgeIt : public Edge {}; | 
   112     //  class SymEdgeIt : public Edge {}; | 
   162   | 
   113   | 
   163     /// This iterator goes through each edge.  | 
   114     /// This iterator goes through each edge.  | 
   164   | 
   115   | 
   165     /// This iterator goes through each edge of a graph.  | 
   116     /// This iterator goes through each edge of a graph.  | 
   362     GraphSkeleturo() {} | 
   313     GraphSkeleturo() {} | 
   363     ///Copy consructor.  | 
   314     ///Copy consructor.  | 
   364     GraphSkeleturo(const GraphSkeleturo &G) {} | 
   315     GraphSkeleturo(const GraphSkeleturo &G) {} | 
   365   };  | 
   316   };  | 
   366   | 
   317   | 
         | 
   318   /// An empty out-edge-iterable graph class.  | 
         | 
   319     | 
         | 
   320   /// An empty graph class which provides a function to   | 
         | 
   321   /// iterate on out-edges of any node.  | 
         | 
   322   class OutEdgeIterableGraphSkeleturo : public GraphSkeleturo  | 
         | 
   323   { | 
         | 
   324   public:  | 
         | 
   325   | 
         | 
   326     /// This iterator goes trough the outgoing edges of a node.  | 
         | 
   327   | 
         | 
   328     /// This iterator goes trough the \e outgoing edges of a certain node  | 
         | 
   329     /// of a graph.  | 
         | 
   330     /// Its usage is quite simple, for example you can count the number  | 
         | 
   331     /// of outgoing edges of a node \c n  | 
         | 
   332     /// in graph \c G of type \c Graph as follows.  | 
         | 
   333     /// \code  | 
         | 
   334     ///int count=0;  | 
         | 
   335     ///for(Graph::OutEdgeIt e(G,n); G.valid(e); G.next(e)) ++count;  | 
         | 
   336     /// \endcode  | 
         | 
   337     class OutEdgeIt : public Edge { | 
         | 
   338     public:  | 
         | 
   339       /// @warning The default constructor sets the iterator  | 
         | 
   340       /// to an undefined value.  | 
         | 
   341       OutEdgeIt() {} | 
         | 
   342       /// Initialize the iterator to be invalid  | 
         | 
   343       OutEdgeIt(Invalid) {} | 
         | 
   344       /// This constructor sets the iterator to first outgoing edge.  | 
         | 
   345       | 
         | 
   346       /// This constructor set the iterator to the first outgoing edge of  | 
         | 
   347       /// node  | 
         | 
   348       ///@param n the node  | 
         | 
   349       ///@param G the graph  | 
         | 
   350       OutEdgeIt(const GraphSkeleturo & G, Node n) {} | 
         | 
   351     };  | 
         | 
   352   };  | 
         | 
   353   | 
         | 
   354   /// An empty in-edge-iterable graph class.  | 
         | 
   355     | 
         | 
   356   /// An empty graph class which provides a function to   | 
         | 
   357   /// iterate on in-edges of any node.  | 
         | 
   358   class InEdgeIterableGraphSkeleturo : public GraphSkeleturo  | 
         | 
   359   { | 
         | 
   360   public:  | 
         | 
   361   | 
         | 
   362     /// This iterator goes trough the incoming edges of a node.  | 
         | 
   363   | 
         | 
   364     /// This iterator goes trough the \e incoming edges of a certain node  | 
         | 
   365     /// of a graph.  | 
         | 
   366     /// Its usage is quite simple, for example you can count the number  | 
         | 
   367     /// of incoming edges of a node \c n  | 
         | 
   368     /// in graph \c G of type \c Graph as follows.  | 
         | 
   369     /// \code  | 
         | 
   370     ///int count=0;  | 
         | 
   371     ///for(Graph::InEdgeIt e(G,n); G.valid(e); G.next(e)) ++count;  | 
         | 
   372     /// \endcode  | 
         | 
   373     class InEdgeIt : public Edge { | 
         | 
   374     public:  | 
         | 
   375       /// @warning The default constructor sets the iterator  | 
         | 
   376       /// to an undefined value.  | 
         | 
   377       InEdgeIt() {} | 
         | 
   378       /// Initialize the iterator to be invalid  | 
         | 
   379       InEdgeIt(Invalid) {} | 
         | 
   380       /// This constructor sets the iterator to first incomig edge.  | 
         | 
   381       | 
         | 
   382       /// This constructor set the iterator to the first incomig edge of  | 
         | 
   383       /// node  | 
         | 
   384       ///@param n the node  | 
         | 
   385       ///@param G the graph  | 
         | 
   386       InEdgeIt(const GraphSkeleturo & G, Node n) {} | 
         | 
   387     };  | 
         | 
   388   };  | 
         | 
   389   | 
         | 
   390   | 
   367   /// An empty node-eraseable graph class.  | 
   391   /// An empty node-eraseable graph class.  | 
   368     | 
   392     | 
   369   /// An empty graph class which provides a function to   | 
   393   /// An empty graph class which provides a function to   | 
   370   /// delete any of its nodes.  | 
   394   /// delete any of its nodes.  | 
   371   class NodeEraseableGraphSkeleturo : public GraphSkeleturo  | 
   395   class NodeEraseableGraphSkeleturo : public GraphSkeleturo  |