diff -r bb77eaa8fa0e -r 6153d9cf78c6 src/hugo/list_graph.h
--- a/src/hugo/list_graph.h	Wed Sep 29 10:35:35 2004 +0000
+++ b/src/hugo/list_graph.h	Wed Sep 29 14:02:14 2004 +0000
@@ -29,6 +29,8 @@
 #include <hugo/map_registry.h>
 #include <hugo/array_map.h>
 
+#include <hugo/sym_map.h>
+
 #include <hugo/map_defines.h>
 
 
@@ -102,7 +104,6 @@
 	first_free_node(_g.first_free_node), edges(_g.edges),
 	first_free_edge(_g.first_free_edge) {}
     
-    /// \bug In the vector can be hole if a node is erased from the graph.
     ///Number of nodes.
     int nodeNum() const { return nodes.size(); }
     ///Number of edges.
@@ -437,7 +438,7 @@
   ///
   ///\todo this date structure need some reconsiderations. Maybe it
   ///should be implemented independently from ListGraph.
-  /*  
+  
   class SymListGraph : public ListGraph
   {
   public:
@@ -482,402 +483,8 @@
       ListGraph::erase(f);
       ListGraph::erase(e);
     }    
-    };*/
+  };
 
-  class SymListGraph : public ListGraph {
-    typedef ListGraph Parent;
-  public:
-
-    typedef SymListGraph Graph;
-
-    typedef ListGraph::Node Node;
-    typedef ListGraph::NodeIt NodeIt;
-
-    class SymEdge;
-    class SymEdgeIt;
-
-    class Edge;
-    class EdgeIt;
-    class OutEdgeIt;
-    class InEdgeIt;
-
-    template <typename Value>
-    class NodeMap : public Parent::NodeMap<Value> {      
-    public:
-      NodeMap(const SymListGraph& g) 
-	: SymListGraph::Parent::NodeMap<Value>(g) {}
-      NodeMap(const SymListGraph& g, Value v) 
-	: SymListGraph::Parent::NodeMap<Value>(g, v) {}
-      template<typename TT> 
-      NodeMap(const NodeMap<TT>& copy) 
-	: SymListGraph::Parent::NodeMap<Value>(copy) { }            
-    };
-
-    template <typename Value>
-    class SymEdgeMap : public Parent::EdgeMap<Value> {
-    public:
-      typedef SymEdge KeyType;
-
-      SymEdgeMap(const SymListGraph& g) 
-	: SymListGraph::Parent::EdgeMap<Value>(g) {}
-      SymEdgeMap(const SymListGraph& g, Value v) 
-	: SymListGraph::Parent::EdgeMap<Value>(g, v) {}
-      template<typename TT> 
-      SymEdgeMap(const SymEdgeMap<TT>& copy) 
-	: SymListGraph::Parent::EdgeMap<Value>(copy) { }
-      
-    };
-
-    // Create edge map registry.
-    CREATE_EDGE_MAP_REGISTRY;
-    // Create edge maps.
-    CREATE_EDGE_MAP(ArrayMap);
-
-    class Edge {
-      friend class SymListGraph;
-      friend class SymListGraph::EdgeIt;
-      friend class SymListGraph::OutEdgeIt;
-      friend class SymListGraph::InEdgeIt;
-      
-    protected:
-      int id;
-
-      Edge(int pid) { id = pid; }
-
-    public:
-      /// An Edge with id \c n.
-
-      Edge() { }
-      Edge (Invalid) { id = -1; }
-
-      operator SymEdge(){ return SymEdge(id >> 1);}
-      
-      bool operator==(const Edge i) const {return id == i.id;}
-      bool operator!=(const Edge i) const {return id != i.id;}
-      bool operator<(const Edge i) const {return id < i.id;}
-      //      ///Validity check
-      //      operator bool() { return n!=-1; }
-    };
-
-    class SymEdge : public ListGraph::Edge {
-      friend class SymListGraph;
-      friend class SymListGraph::Edge;
-      typedef ListGraph::Edge Parent;
-
-    protected:      
-      SymEdge(int pid) : Parent(pid) {}
-    public:
-
-      SymEdge() { }
-      SymEdge(const ListGraph::Edge& i) : Parent(i) {} 
-      SymEdge (Invalid) : Parent(INVALID) {}
-
-    };
-
-    class OutEdgeIt {
-      Parent::OutEdgeIt out;
-      Parent::InEdgeIt in;      
-    public: 
-      OutEdgeIt() {}
-      OutEdgeIt(const SymListGraph& g, Edge e) { 
-	if ((e.id & 1) == 0) {	
-	  out = Parent::OutEdgeIt(g, SymEdge(e));
-	  in = Parent::InEdgeIt(g, g.tail(e));
-	} else {
-	  out = Parent::OutEdgeIt(INVALID);
-	  in = Parent::InEdgeIt(g, SymEdge(e));
-	}
-      }
-      OutEdgeIt (Invalid i) : out(INVALID), in(INVALID) { }
-
-      OutEdgeIt(const SymListGraph& g, const Node v)
-	: out(g, v), in(g, v) {}
-      OutEdgeIt &operator++() { 
-	if (out != INVALID) {
-	  ++out;
-	} else {
-	  ++in;
-	}
-	return *this; 
-      }
-
-      operator Edge() const {
-	if (out == INVALID && in == INVALID) return INVALID;
-	return out != INVALID ? forward(out) : backward(in);
-      }
-
-      bool operator==(const Edge i) const {return Edge(*this) == i;}
-      bool operator!=(const Edge i) const {return Edge(*this) != i;}
-      bool operator<(const Edge i) const {return Edge(*this) < i;}
-    };
-
-    class InEdgeIt {
-      Parent::OutEdgeIt out;
-      Parent::InEdgeIt in;      
-    public: 
-      InEdgeIt() {}
-      InEdgeIt(const SymListGraph& g, Edge e) { 
-	if ((e.id & 1) == 0) {	
-	  out = Parent::OutEdgeIt(g, SymEdge(e));
-	  in = Parent::InEdgeIt(g, g.tail(e));
-	} else {
-	  out = Parent::OutEdgeIt(INVALID);
-	  in = Parent::InEdgeIt(g, SymEdge(e));
-	}
-      }
-      InEdgeIt (Invalid i) : out(INVALID), in(INVALID) { }
-
-      InEdgeIt(const SymListGraph& g, const Node v)
-	: out(g, v), in(g, v) {}
-
-      InEdgeIt &operator++() { 
-	if (out != INVALID) {
-	  ++out;
-	} else {
-	  ++in;
-	}
-	return *this; 
-      }
-
-      operator Edge() const {
-	if (out == INVALID && in == INVALID) return INVALID;
-	return out != INVALID ? backward(out) : forward(in);
-      }
-
-      bool operator==(const Edge i) const {return Edge(*this) == i;}
-      bool operator!=(const Edge i) const {return Edge(*this) != i;}
-      bool operator<(const Edge i) const {return Edge(*this) < i;}
-    };
-
-    class SymEdgeIt : public Parent::EdgeIt {
-
-    public:
-      SymEdgeIt() {}
-
-      SymEdgeIt(const SymListGraph& g) 
-	: SymListGraph::Parent::EdgeIt(g) {}
-
-      SymEdgeIt(const SymListGraph& g, SymEdge e) 
-	: SymListGraph::Parent::EdgeIt(g, e) {}
-
-      SymEdgeIt(Invalid i) 
-	: SymListGraph::Parent::EdgeIt(INVALID) {}
-
-      SymEdgeIt& operator++() {
-	SymListGraph::Parent::EdgeIt::operator++();
-	return *this;
-      }
-
-      operator SymEdge() const {
-	return SymEdge
-	  (static_cast<const SymListGraph::Parent::EdgeIt&>(*this));
-      }
-      bool operator==(const SymEdge i) const {return SymEdge(*this) == i;}
-      bool operator!=(const SymEdge i) const {return SymEdge(*this) != i;}
-      bool operator<(const SymEdge i) const {return SymEdge(*this) < i;}
-    };
-
-    class EdgeIt {
-      SymEdgeIt it;
-      bool fw;
-    public:
-      EdgeIt(const SymListGraph& g) : it(g), fw(true) {}
-      EdgeIt (Invalid i) : it(i) { }
-      EdgeIt(const SymListGraph& g, Edge e) 
-	: it(g, SymEdge(e)), fw(id(e) & 1 == 0) { }
-      EdgeIt() { }
-      EdgeIt& operator++() {
-	fw = !fw;
-	if (fw) ++it;
-	return *this;
-      }
-      operator Edge() const {
-	if (it == INVALID) return INVALID;
-	return fw ? forward(it) : backward(it);
-      }
-      bool operator==(const Edge i) const {return Edge(*this) == i;}
-      bool operator!=(const Edge i) const {return Edge(*this) != i;}
-      bool operator<(const Edge i) const {return Edge(*this) < i;}
-
-    };
-
-    ///Number of nodes.
-    int nodeNum() const { return Parent::nodeNum(); }
-    ///Number of edges.
-    int edgeNum() const { return 2*Parent::edgeNum(); }
-    ///Number of symmetric edges.
-    int symEdgeNum() const { return Parent::edgeNum(); }
-
-    ///Set the expected maximum number of edges.
-
-    ///With this function, it is possible to set the expected number of edges.
-    ///The use of this fasten the building of the graph and makes
-    ///it possible to avoid the superfluous memory allocation.
-    void reserveSymEdge(int n) { Parent::reserveEdge(n); };
-    
-    /// Maximum node ID.
-    
-    /// Maximum node ID.
-    ///\sa id(Node)
-    int maxNodeId() const { return Parent::maxNodeId(); } 
-    /// Maximum edge ID.
-    
-    /// Maximum edge ID.
-    ///\sa id(Edge)
-    int maxEdgeId() const { return 2*Parent::maxEdgeId(); }
-    /// Maximum symmetric edge ID.
-    
-    /// Maximum symmetric edge ID.
-    ///\sa id(SymEdge)
-    int maxSymEdgeId() const { return Parent::maxEdgeId(); }
-
-
-    Node tail(Edge e) const { 
-      return (e.id & 1) == 0 ? 
-	Parent::tail(SymEdge(e)) : Parent::head(SymEdge(e)); 
-    }
-
-    Node head(Edge e) const { 
-      return (e.id & 1) == 0 ? 
-	Parent::head(SymEdge(e)) : Parent::tail(SymEdge(e)); 
-    }
-
-    Node tail(SymEdge e) const { 
-      return Parent::tail(e); 
-    }
-
-    Node head(SymEdge e) const { 
-      return Parent::head(e); 
-    }
-
-    NodeIt& first(NodeIt& v) const { 
-      v=NodeIt(*this); return v; }
-    EdgeIt& first(EdgeIt& e) const { 
-      e=EdgeIt(*this); return e; }
-    SymEdgeIt& first(SymEdgeIt& e) const {
-      e=SymEdgeIt(*this); return e; }
-    OutEdgeIt& first(OutEdgeIt& e, const Node v) const { 
-      e=OutEdgeIt(*this,v); return e; }
-    InEdgeIt& first(InEdgeIt& e, const Node v) const { 
-      e=InEdgeIt(*this,v); return e; }
-
-    /// Node ID.
-    
-    /// The ID of a valid Node is a nonnegative integer not greater than
-    /// \ref maxNodeId(). The range of the ID's is not surely continuous
-    /// and the greatest node ID can be actually less then \ref maxNodeId().
-    ///
-    /// The ID of the \ref INVALID node is -1.
-    ///\return The ID of the node \c v. 
-    static int id(Node v) { return Parent::id(v); }
-    /// Edge ID.
-    
-    /// The ID of a valid Edge is a nonnegative integer not greater than
-    /// \ref maxEdgeId(). The range of the ID's is not surely continuous
-    /// and the greatest edge ID can be actually less then \ref maxEdgeId().
-    ///
-    /// The ID of the \ref INVALID edge is -1.
-    ///\return The ID of the edge \c e. 
-    static int id(Edge e) { return e.id; }
-
-    /// The ID of a valid SymEdge is a nonnegative integer not greater than
-    /// \ref maxSymEdgeId(). The range of the ID's is not surely continuous
-    /// and the greatest edge ID can be actually less then \ref maxSymEdgeId().
-    ///
-    /// The ID of the \ref INVALID symmetric edge is -1.
-    ///\return The ID of the edge \c e. 
-    static int id(SymEdge e) { return Parent::id(e); }
-
-    /// Adds a new node to the graph.
-
-    /// \warning It adds the new node to the front of the list.
-    /// (i.e. the lastly added node becomes the first.)
-    Node addNode() {
-      return Parent::addNode();
-    }
-    
-    SymEdge addEdge(Node u, Node v) {
-      SymEdge se = Parent::addEdge(u, v);
-      edge_maps.add(forward(se));
-      edge_maps.add(backward(se));
-      return se;
-    }
-    
-    /// Finds an edge between two nodes.
-
-    /// Finds an edge from node \c u to node \c v.
-    ///
-    /// If \c prev is \ref INVALID (this is the default value), then
-    /// It finds the first edge from \c u to \c v. Otherwise it looks for
-    /// the next edge from \c u to \c v after \c prev.
-    /// \return The found edge or INVALID if there is no such an edge.
-    Edge findEdge(Node u, Node v, Edge prev = INVALID) 
-    {     
-      if (prev == INVALID || id(prev) & 1 == 0) {
-	SymEdge se = Parent::findEdge(u, v, SymEdge(prev));
-	if (se != INVALID) return forward(se);
-      } else {
-	SymEdge se = Parent::findEdge(v, u, SymEdge(prev));
-	if (se != INVALID) return backward(se);	
-      }
-      return INVALID;
-    }
-
-//     /// Finds an symmetric edge between two nodes.
-
-//     /// Finds an symmetric edge from node \c u to node \c v.
-//     ///
-//     /// If \c prev is \ref INVALID (this is the default value), then
-//     /// It finds the first edge from \c u to \c v. Otherwise it looks for
-//     /// the next edge from \c u to \c v after \c prev.
-//     /// \return The found edge or INVALID if there is no such an edge.
-
-//     SymEdge findEdge(Node u, Node v, SymEdge prev = INVALID) 
-//     {     
-//       if (prev == INVALID || id(prev) & 1 == 0) {
-// 	SymEdge se = Parent::findEdge(u, v, SymEdge(prev));
-// 	if (se != INVALID) return se;
-//       } else {
-// 	SymEdge se = Parent::findEdge(v, u, SymEdge(prev));
-// 	if (se != INVALID) return se;	
-//       }
-//       return INVALID;
-//     }
-    
-  public:
-
-    void erase(Node n) {      
-      for (OutEdgeIt it(*this, n); it != INVALID; ++it) {
-	edge_maps.erase(it);
-	edge_maps.erase(opposite(it));
-      }
-      Parent::erase(n);
-    }
-    
-    void erase(SymEdge e) { 
-      edge_maps.erase(forward(e));
-      edge_maps.erase(backward(e));
-      Parent::erase(e); 
-    };
-
-    void clear() {
-      edge_maps.clear();
-      Parent::clear();
-    }
-
-    static Edge opposite(Edge e) {
-      return Edge(id(e) ^ 1);
-    }
-
-    static Edge forward(SymEdge e) {
-      return Edge(id(e) << 1);
-    }
-
-    static Edge backward(SymEdge e) {
-      return Edge((id(e) << 1) | 1);
-    }
-
-  };
 
   ///A graph class containing only nodes.