RhodeCode

          clear();

          node_observer_proxy.detach();

          throw ArcNotifier::ImmediateDetach();

        } else {

          added_arcs.erase(it);

        }

      }

      void attach(ListDigraph &_digraph) {

        digraph = &_digraph;

        node_observer_proxy.attach(digraph->notifier(Node()));

        arc_observer_proxy.attach(digraph->notifier(Arc()));

      }

      void detach() {

        node_observer_proxy.detach();

        arc_observer_proxy.detach();

      }

      bool attached() const {

        return node_observer_proxy.attached();

      }

      void clear() {

        added_nodes.clear();

        added_arcs.clear();

      }

    public:

      /// \brief Default constructor.

      ///

      /// Default constructor.

      /// You have to call save() to actually make a snapshot.

      Snapshot()

        : digraph(0), node_observer_proxy(*this),

          arc_observer_proxy(*this) {}

      /// \brief Constructor that immediately makes a snapshot.

      ///

      /// This constructor immediately makes a snapshot of the given digraph.

      Snapshot(ListDigraph &gr)

        : node_observer_proxy(*this),

          arc_observer_proxy(*this) {

        attach(gr);

      }

      /// \brief Make a snapshot.

      ///

      /// This function makes a snapshot of the given digraph.

      /// It can be called more than once. In case of a repeated

      /// call, the previous snapshot gets lost.

      void save(ListDigraph &gr) {

        if (attached()) {

          detach();

          clear();

        }

        attach(gr);

      }

      /// \brief Undo the changes until the last snapshot.

      ///

      /// This function undos the changes until the last snapshot

      /// created by save() or Snapshot(ListDigraph&).

      void restore() {

        detach();

        for(std::list<Arc>::iterator it = added_arcs.begin();

            it != added_arcs.end(); ++it) {

          digraph->erase(*it);

        }

        for(std::list<Node>::iterator it = added_nodes.begin();

            it != added_nodes.end(); ++it) {

          digraph->erase(*it);

        }

        clear();

      }

      /// \brief Returns \c true if the snapshot is valid.

      ///

      /// This function returns \c true if the snapshot is valid.

      bool valid() const {

        return attached();

      }

    };

  };

  ///@}

  class ListGraphBase {

  protected:

    struct NodeT {

      int first_out;

      int prev, next;

    };

    struct ArcT {

      int target;

      int prev_out, next_out;

    };

    std::vector<NodeT> nodes;

    int first_node;

    int first_free_node;

    std::vector<ArcT> arcs;

    int first_free_arc;

  public:

    typedef ListGraphBase Graph;

    class Node {

      friend class ListGraphBase;

    protected:

      int id;

      explicit Node(int pid) { id = pid;}

    public:

      Node() {}

      Node (Invalid) { id = -1; }

      bool operator==(const Node& node) const {return id == node.id;}

          clear();

          node_observer_proxy.detach();

          throw EdgeNotifier::ImmediateDetach();

        } else {

          added_edges.erase(it);

        }

      }

      void attach(ListGraph &_graph) {

        graph = &_graph;

        node_observer_proxy.attach(graph->notifier(Node()));

        edge_observer_proxy.attach(graph->notifier(Edge()));

      }

      void detach() {

        node_observer_proxy.detach();

        edge_observer_proxy.detach();

      }

      bool attached() const {

        return node_observer_proxy.attached();

      }

      void clear() {

        added_nodes.clear();

        added_edges.clear();

      }

    public:

      /// \brief Default constructor.

      ///

      /// Default constructor.

      /// You have to call save() to actually make a snapshot.

      Snapshot()

        : graph(0), node_observer_proxy(*this),

          edge_observer_proxy(*this) {}

      /// \brief Constructor that immediately makes a snapshot.

      ///

      /// This constructor immediately makes a snapshot of the given graph.

      Snapshot(ListGraph &gr)

        : node_observer_proxy(*this),

          edge_observer_proxy(*this) {

        attach(gr);

      }

      /// \brief Make a snapshot.

      ///

      /// This function makes a snapshot of the given graph.

      /// It can be called more than once. In case of a repeated

      /// call, the previous snapshot gets lost.

      void save(ListGraph &gr) {

        if (attached()) {

          detach();

          clear();

        }

        attach(gr);

      }

      /// \brief Undo the changes until the last snapshot.

      ///

      /// This function undos the changes until the last snapshot

      /// created by save() or Snapshot(ListGraph&).

      void restore() {

        detach();

        for(std::list<Edge>::iterator it = added_edges.begin();

            it != added_edges.end(); ++it) {

          graph->erase(*it);

        }

        for(std::list<Node>::iterator it = added_nodes.begin();

            it != added_nodes.end(); ++it) {

          graph->erase(*it);

        }

        clear();

      }

      /// \brief Returns \c true if the snapshot is valid.

      ///

      /// This function returns \c true if the snapshot is valid.

      bool valid() const {

        return attached();

      }

    };

  };

  /// @}

} //namespace lemon

#endif

  // Check node deletion

  G.erase(n4);

  checkGraphNodeList(G, 3);

  checkGraphArcList(G, 1);

  checkGraphOutArcList(G, n1, 0);

  checkGraphOutArcList(G, n2, 0);

  checkGraphOutArcList(G, n3, 1);

  checkGraphOutArcList(G, n4, 0);

  checkGraphInArcList(G, n1, 1);

  checkGraphInArcList(G, n2, 0);

  checkGraphInArcList(G, n3, 0);

  checkGraphInArcList(G, n4, 0);

  checkGraphConArcList(G, 1);

}

template <class Digraph>

void checkDigraphSnapshot() {

  TEMPLATE_DIGRAPH_TYPEDEFS(Digraph);

  Digraph G;

  Node n1 = G.addNode(), n2 = G.addNode(), n3 = G.addNode();

  Arc a1 = G.addArc(n1, n2), a2 = G.addArc(n2, n1),

      a3 = G.addArc(n2, n3), a4 = G.addArc(n2, n3);

  typename Digraph::Snapshot snapshot(G);

  Node n = G.addNode();

  G.addArc(n3, n);

  G.addArc(n, n3);

  checkGraphNodeList(G, 4);

  checkGraphArcList(G, 6);

  snapshot.restore();

  checkGraphNodeList(G, 3);

  checkGraphArcList(G, 4);

  checkGraphOutArcList(G, n1, 1);

  checkGraphOutArcList(G, n2, 3);

  checkGraphOutArcList(G, n3, 0);

  checkGraphInArcList(G, n1, 1);

  checkGraphInArcList(G, n2, 1);

  checkGraphInArcList(G, n3, 2);

  checkGraphConArcList(G, 4);

  checkNodeIds(G);

  checkArcIds(G);

  checkGraphNodeMap(G);

  checkGraphArcMap(G);

  G.addNode();

  snapshot.save(G);

  G.addArc(G.addNode(), G.addNode());

  snapshot.restore();

  checkGraphNodeList(G, 4);

  checkGraphArcList(G, 4);

}

void checkConcepts() {

  { // Checking digraph components

    checkConcept<BaseDigraphComponent, BaseDigraphComponent >();

    checkConcept<IDableDigraphComponent<>,

      IDableDigraphComponent<> >();

    checkConcept<IterableDigraphComponent<>,

      IterableDigraphComponent<> >();

    checkConcept<MappableDigraphComponent<>,

      MappableDigraphComponent<> >();

  }

  { // Checking skeleton digraph

    checkConcept<Digraph, Digraph>();

  }

  { // Checking ListDigraph

    checkConcept<Digraph, ListDigraph>();

    checkConcept<AlterableDigraphComponent<>, ListDigraph>();

    checkConcept<ExtendableDigraphComponent<>, ListDigraph>();

    checkConcept<ClearableDigraphComponent<>, ListDigraph>();

    checkConcept<ErasableDigraphComponent<>, ListDigraph>();

  }

  { // Checking SmartDigraph

    checkConcept<Digraph, SmartDigraph>();

    checkConcept<AlterableDigraphComponent<>, SmartDigraph>();

    checkConcept<ExtendableDigraphComponent<>, SmartDigraph>();

    checkConcept<ClearableDigraphComponent<>, SmartDigraph>();

  }

  { // Checking FullDigraph

    checkConcept<Digraph, FullDigraph>();

  }

}

template <typename Digraph>

void checkDigraphValidity() {

  TEMPLATE_DIGRAPH_TYPEDEFS(Digraph);

  Digraph g;

  Node

    n1 = g.addNode(),

    n2 = g.addNode(),

    n3 = g.addNode();

  Arc

    e1 = g.addArc(n1, n2),

    e2 = g.addArc(n2, n3);

  check(g.valid(n1), "Wrong validity check");

  check(g.valid(e1), "Wrong validity check");

  check(!g.valid(g.nodeFromId(-1)), "Wrong validity check");

  check(!g.valid(g.arcFromId(-1)), "Wrong validity check");

}

template <typename Digraph>

void checkDigraphValidityErase() {

  TEMPLATE_DIGRAPH_TYPEDEFS(Digraph);

  Digraph g;

  checkGraphNodeList(G, 3);

  checkGraphEdgeList(G, 2);

  checkGraphArcList(G, 4);

  checkGraphIncEdgeArcLists(G, n1, 2);

  checkGraphIncEdgeArcLists(G, n2, 1);

  checkGraphIncEdgeArcLists(G, n4, 1);

  checkGraphConEdgeList(G, 2);

  checkGraphConArcList(G, 4);

}

template <class Graph>

void checkGraphSnapshot() {

  TEMPLATE_GRAPH_TYPEDEFS(Graph);

  Graph G;

  Node n1 = G.addNode(), n2 = G.addNode(), n3 = G.addNode();

  Edge e1 = G.addEdge(n1, n2), e2 = G.addEdge(n2, n1),

       e3 = G.addEdge(n2, n3);

  checkGraphNodeList(G, 3);

  checkGraphEdgeList(G, 3);

  checkGraphArcList(G, 6);

  typename Graph::Snapshot snapshot(G);

  Node n = G.addNode();

  G.addEdge(n3, n);

  G.addEdge(n, n3);

  G.addEdge(n3, n2);

  checkGraphNodeList(G, 4);

  checkGraphEdgeList(G, 6);

  checkGraphArcList(G, 12);

  snapshot.restore();

  checkGraphNodeList(G, 3);

  checkGraphEdgeList(G, 3);

  checkGraphArcList(G, 6);

  checkGraphIncEdgeArcLists(G, n1, 2);

  checkGraphIncEdgeArcLists(G, n2, 3);

  checkGraphIncEdgeArcLists(G, n3, 1);

  checkGraphConEdgeList(G, 3);

  checkGraphConArcList(G, 6);

  checkNodeIds(G);

  checkEdgeIds(G);

  checkArcIds(G);

  checkGraphNodeMap(G);

  checkGraphEdgeMap(G);

  checkGraphArcMap(G);

  G.addNode();

  snapshot.save(G);

  G.addEdge(G.addNode(), G.addNode());

  snapshot.restore();

  checkGraphNodeList(G, 4);

  checkGraphEdgeList(G, 3);

  checkGraphArcList(G, 6);

}

void checkFullGraph(int num) {

  typedef FullGraph Graph;

  GRAPH_TYPEDEFS(Graph);

  Graph G(num);

  check(G.nodeNum() == num && G.edgeNum() == num * (num - 1) / 2,

        "Wrong size");

  G.resize(num);

  check(G.nodeNum() == num && G.edgeNum() == num * (num - 1) / 2,

        "Wrong size");

  checkGraphNodeList(G, num);

  checkGraphEdgeList(G, num * (num - 1) / 2);

  for (NodeIt n(G); n != INVALID; ++n) {

    checkGraphOutArcList(G, n, num - 1);

    checkGraphInArcList(G, n, num - 1);

    checkGraphIncEdgeList(G, n, num - 1);

  }

  checkGraphConArcList(G, num * (num - 1));

  checkGraphConEdgeList(G, num * (num - 1) / 2);

  checkArcDirections(G);

  checkNodeIds(G);

  checkArcIds(G);

  checkEdgeIds(G);

  checkGraphNodeMap(G);

  checkGraphArcMap(G);

  checkGraphEdgeMap(G);

  for (int i = 0; i < G.nodeNum(); ++i) {

    check(G.index(G(i)) == i, "Wrong index");

  }

  for (NodeIt u(G); u != INVALID; ++u) {

    for (NodeIt v(G); v != INVALID; ++v) {

      Edge e = G.edge(u, v);

      Arc a = G.arc(u, v);

      if (u == v) {

        check(e == INVALID, "Wrong edge lookup");

        check(a == INVALID, "Wrong arc lookup");

      } else {

        check((G.u(e) == u && G.v(e) == v) ||

              (G.u(e) == v && G.v(e) == u), "Wrong edge lookup");

        check(G.source(a) == u && G.target(a) == v, "Wrong arc lookup");

      }

    }

  }

}

void checkConcepts() {

  { // Checking graph components

    checkConcept<BaseGraphComponent, BaseGraphComponent >();