LEMON/LEMON-official Changeset - r78:c46b3453455f

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Changeset - r78:c46b3453455f

« 77:2de55e

92:5d4dec »
84:816101 »

r78:c46b3453455f

Thu, 28 Feb 2008 17:06:02

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deba@inf.elte.hu
deba@inf.elte.hu

Renaming types and variables

0 3 0

default

3 files changed with 146 insertions and 146 deletions:

lemon/bits/graph_extender.h

129

lemon/concepts/graph.h

lemon/concepts/graph_components.h

↑ Collapse diff ↑

lemon/bits/graph_extender.h

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 		/* -*- C++ -*-
+		 *
 		 * This file is a part of LEMON, a generic C++ optimization library
+		 *
 		 * Copyright (C) 2003-2007
 		 * Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport
 		 * (Egervary Research Group on Combinatorial Optimization, EGRES).
+		 *
 		 * Permission to use, modify and distribute this software is granted
 		 * provided that this copyright notice appears in all copies. For
 		 * precise terms see the accompanying LICENSE file.
+		 *
 		 * This software is provided "AS IS" with no warranty of any kind,
 		 * express or implied, and with no claim as to its suitability for any
 		 * purpose.
+		 *
 		 */
 		#ifndef LEMON_BITS_GRAPH_EXTENDER_H
 		#define LEMON_BITS_GRAPH_EXTENDER_H
 		#include <lemon/bits/invalid.h>
 		#include <lemon/bits/utility.h>
 		#include <lemon/bits/map_extender.h>
 		#include <lemon/bits/default_map.h>
 		#include <lemon/concept_check.h>
 		#include <lemon/concepts/maps.h>
 		///\ingroup graphbits
 		///\file
 		///\brief Extenders for the digraph types
 		namespace lemon {
 		  /// \ingroup graphbits
 		  ///
 		  /// \brief Extender for the Digraphs
 		  template <typename Base>
 		  class DigraphExtender : public Base {
 		  public:
 		    typedef Base Parent;
 		    typedef DigraphExtender Digraph;
 		    // Base extensions
 		    typedef typename Parent::Node Node;
 		    typedef typename Parent::Arc Arc;
 		    int maxId(Node) const {
 		      return Parent::maxNodeId();
+		    }
 		    int maxId(Arc) const {
 		      return Parent::maxArcId();
+		    }
 		    Node fromId(int id, Node) const {
 		      return Parent::nodeFromId(id);
+		    }
 		    Arc fromId(int id, Arc) const {
 		      return Parent::arcFromId(id);
+		    }
 		    Node oppositeNode(const Node &n, const Arc &e) const {
 		      if (n == Parent::source(e))
 			return Parent::target(e);
 		      else if(n==Parent::target(e))
-			return Parent::source(e);
+		    Node oppositeNode(const Node &node, const Arc &arc) const {
 		      if (node == Parent::source(arc))
 			return Parent::target(arc);
 		      else if(node == Parent::target(arc))
 			return Parent::source(arc);
 		      else
 			return INVALID;
+		    }
 		    // Alterable extension
 		    typedef AlterationNotifier<DigraphExtender, Node> NodeNotifier;
 		    typedef AlterationNotifier<DigraphExtender, Arc> ArcNotifier;
 		  protected:
 		    mutable NodeNotifier node_notifier;
 		    mutable ArcNotifier arc_notifier;
 		  public:
 		    NodeNotifier& notifier(Node) const {
 		      return node_notifier;
+		    }
 		    ArcNotifier& notifier(Arc) const {
 		      return arc_notifier;
+		    }
 		    class NodeIt : public Node {
-		      const Digraph* digraph;
+		      const Digraph* _digraph;
 		    public:
 		      NodeIt() {}
 		      NodeIt(Invalid i) : Node(i) { }
 		      explicit NodeIt(const Digraph& _digraph) : digraph(&_digraph) {
 			_digraph.first(static_cast<Node&>(*this));
 		      explicit NodeIt(const Digraph& digraph) : _digraph(&digraph) {
 			_digraph->first(static_cast<Node&>(*this));
+		      }
 		      NodeIt(const Digraph& _digraph, const Node& node)
 			: Node(node), digraph(&_digraph) {}
 		      NodeIt(const Digraph& digraph, const Node& node)
 			: Node(node), _digraph(&digraph) {}
 		      NodeIt& operator++() {
-			digraph->next(*this);
+			_digraph->next(*this);
 			return *this;
+		      }
 		    };
 		    class ArcIt : public Arc {
-		      const Digraph* digraph;
+		      const Digraph* _digraph;
 		    public:
 		      ArcIt() { }
 		      ArcIt(Invalid i) : Arc(i) { }
 		      explicit ArcIt(const Digraph& _digraph) : digraph(&_digraph) {
 			_digraph.first(static_cast<Arc&>(*this));
 		      explicit ArcIt(const Digraph& digraph) : _digraph(&digraph) {
 			_digraph->first(static_cast<Arc&>(*this));
+		      }
 		      ArcIt(const Digraph& _digraph, const Arc& e) :
 			Arc(e), digraph(&_digraph) { }
 		      ArcIt(const Digraph& digraph, const Arc& arc) :
 			Arc(arc), _digraph(&digraph) { }
 		      ArcIt& operator++() {
-			digraph->next(*this);
+			_digraph->next(*this);
 			return *this;
+		      }
 		    };
 		    class OutArcIt : public Arc {
-		      const Digraph* digraph;
+		      const Digraph* _digraph;
 		    public:
 		      OutArcIt() { }
 		      OutArcIt(Invalid i) : Arc(i) { }
 		      OutArcIt(const Digraph& _digraph, const Node& node)
 			: digraph(&_digraph) {
-			_digraph.firstOut(*this, node);
+		      OutArcIt(const Digraph& digraph, const Node& node)
 			: _digraph(&digraph) {
 			_digraph->firstOut(*this, node);
+		      }
 		      OutArcIt(const Digraph& _digraph, const Arc& arc)
 			: Arc(arc), digraph(&_digraph) {}
 		      OutArcIt(const Digraph& digraph, const Arc& arc)
 			: Arc(arc), _digraph(&digraph) {}
 		      OutArcIt& operator++() {
-			digraph->nextOut(*this);
+			_digraph->nextOut(*this);
 			return *this;
+		      }
 		    };
 		    class InArcIt : public Arc {
-		      const Digraph* digraph;
+		      const Digraph* _digraph;
 		    public:
 		      InArcIt() { }
 		      InArcIt(Invalid i) : Arc(i) { }
 		      InArcIt(const Digraph& _digraph, const Node& node)
 			: digraph(&_digraph) {
-			_digraph.firstIn(*this, node);
+		      InArcIt(const Digraph& digraph, const Node& node)
 			: _digraph(&digraph) {
 			_digraph->firstIn(*this, node);
+		      }
 		      InArcIt(const Digraph& _digraph, const Arc& arc) :
 			Arc(arc), digraph(&_digraph) {}
 		      InArcIt(const Digraph& digraph, const Arc& arc) :
 			Arc(arc), _digraph(&digraph) {}
 		      InArcIt& operator++() {
-			digraph->nextIn(*this);
+			_digraph->nextIn(*this);
 			return *this;
+		      }
 		    };
 		    /// \brief Base node of the iterator
 		    ///
 		    /// Returns the base node (i.e. the source in this case) of the iterator
 		    Node baseNode(const OutArcIt &e) const {
 		      return Parent::source(e);
 		    Node baseNode(const OutArcIt &arc) const {
 		      return Parent::source(arc);
+		    }
 		    /// \brief Running node of the iterator
 		    ///
 		    /// Returns the running node (i.e. the target in this case) of the
 		    /// iterator
 		    Node runningNode(const OutArcIt &e) const {
 		      return Parent::target(e);
 		    Node runningNode(const OutArcIt &arc) const {
 		      return Parent::target(arc);
+		    }
 		    /// \brief Base node of the iterator
 		    ///
 		    /// Returns the base node (i.e. the target in this case) of the iterator
 		    Node baseNode(const InArcIt &e) const {
 		      return Parent::target(e);
 		    Node baseNode(const InArcIt &arc) const {
 		      return Parent::target(arc);
+		    }
 		    /// \brief Running node of the iterator
 		    ///
 		    /// Returns the running node (i.e. the source in this case) of the
 		    /// iterator
 		    Node runningNode(const InArcIt &e) const {
 		      return Parent::source(e);
 		    Node runningNode(const InArcIt &arc) const {
 		      return Parent::source(arc);
+		    }
 		    template <typename _Value>
 		    class NodeMap
 		      : public MapExtender<DefaultMap<Digraph, Node, _Value> > {
 		    public:
 		      typedef DigraphExtender Digraph;
 		      typedef MapExtender<DefaultMap<Digraph, Node, _Value> > Parent;
 		      explicit NodeMap(const Digraph& digraph)
 			: Parent(digraph) {}
 		      NodeMap(const Digraph& digraph, const _Value& value)
 			: Parent(digraph, value) {}
 		      NodeMap& operator=(const NodeMap& cmap) {
 			return operator=<NodeMap>(cmap);
+		      }
 		      template <typename CMap>
 		      NodeMap& operator=(const CMap& cmap) {
 		        Parent::operator=(cmap);
 			return *this;
+		      }
 		    };
 		    template <typename _Value>
 		    class ArcMap
 		      : public MapExtender<DefaultMap<Digraph, Arc, _Value> > {
 		    public:
 		      typedef DigraphExtender Digraph;
 		      typedef MapExtender<DefaultMap<Digraph, Arc, _Value> > Parent;
 		      explicit ArcMap(const Digraph& digraph)
 			: Parent(digraph) {}
 		      ArcMap(const Digraph& digraph, const _Value& value)
 			: Parent(digraph, value) {}
 		      ArcMap& operator=(const ArcMap& cmap) {
 			return operator=<ArcMap>(cmap);
+		      }
 		      template <typename CMap>
 		      ArcMap& operator=(const CMap& cmap) {
 		        Parent::operator=(cmap);
 			return *this;
+		      }
 		    };
 		    Node addNode() {
 		      Node node = Parent::addNode();
 		      notifier(Node()).add(node);
 		      return node;
+		    }
 		    Arc addArc(const Node& from, const Node& to) {
 		      Arc arc = Parent::addArc(from, to);
 		      notifier(Arc()).add(arc);
 		      return arc;
+		    }
 		    void clear() {
 		      notifier(Arc()).clear();
 		      notifier(Node()).clear();
 		      Parent::clear();
+		    }
 		    template <typename Digraph, typename NodeRefMap, typename ArcRefMap>
 		    void build(const Digraph& digraph, NodeRefMap& nodeRef, ArcRefMap& arcRef) {
 		      Parent::build(digraph, nodeRef, arcRef);
 		      notifier(Node()).build();
 		      notifier(Arc()).build();
+		    }
 		    void erase(const Node& node) {
 		      Arc arc;
 		      Parent::firstOut(arc, node);
 		      while (arc != INVALID ) {
 			erase(arc);
 			Parent::firstOut(arc, node);
+		      }
 		      Parent::firstIn(arc, node);
 		      while (arc != INVALID ) {
 			erase(arc);
 			Parent::firstIn(arc, node);
+		      }
 		      notifier(Node()).erase(node);
 		      Parent::erase(node);
+		    }
 		    void erase(const Arc& arc) {
 		      notifier(Arc()).erase(arc);
 		      Parent::erase(arc);
+		    }
 		    DigraphExtender() {
 		      node_notifier.setContainer(*this);
 		      arc_notifier.setContainer(*this);
+		    }
 		    ~DigraphExtender() {
 		      arc_notifier.clear();
 		      node_notifier.clear();
+		    }
 		  };
-		  /// \ingroup graphbits
+		  /// \ingroup _graphbits
 		  ///
 		  /// \brief Extender for the Graphs
 		  template <typename Base>
 		  class GraphExtender : public Base {
 		  public:
 		    typedef Base Parent;
-		    typedef GraphExtender Digraph;
+		    typedef GraphExtender Graph;
 		    typedef True UndirectedTag;
 		    typedef typename Parent::Node Node;
 		    typedef typename Parent::Arc Arc;
 		    typedef typename Parent::Edge Edge;
 		    // Graph extension
 		    int maxId(Node) const {
 		      return Parent::maxNodeId();
+		    }
 		    int maxId(Arc) const {
 		      return Parent::maxArcId();
+		    }
 		    int maxId(Edge) const {
 		      return Parent::maxEdgeId();
+		    }
 		    Node fromId(int id, Node) const {
 		      return Parent::nodeFromId(id);
+		    }
 		    Arc fromId(int id, Arc) const {
 		      return Parent::arcFromId(id);
+		    }
 		    Edge fromId(int id, Edge) const {
 		      return Parent::edgeFromId(id);
+		    }
 		    Node oppositeNode(const Node &n, const Edge &e) const {
 		      if( n == Parent::source(e))
 			return Parent::target(e);
 		      else if( n == Parent::target(e))
 			return Parent::source(e);
 		      else
 			return INVALID;
+		    }
 		    Arc oppositeArc(const Arc &e) const {
 		      return Parent::direct(e, !Parent::direction(e));
 		    Arc oppositeArc(const Arc &arc) const {
 		      return Parent::direct(arc, !Parent::direction(arc));
+		    }
 		    using Parent::direct;
 		    Arc direct(const Edge &ue, const Node &s) const {
 		      return Parent::direct(ue, Parent::source(ue) == s);
 		    Arc direct(const Edge &edge, const Node &node) const {
 		      return Parent::direct(edge, Parent::source(edge) == node);
+		    }
 		    // Alterable extension
 		    typedef AlterationNotifier<GraphExtender, Node> NodeNotifier;
 		    typedef AlterationNotifier<GraphExtender, Arc> ArcNotifier;
 		    typedef AlterationNotifier<GraphExtender, Edge> EdgeNotifier;
 		  protected:
 		    mutable NodeNotifier node_notifier;
 		    mutable ArcNotifier arc_notifier;
 		    mutable EdgeNotifier edge_notifier;
 		  public:
 		    NodeNotifier& notifier(Node) const {
 		      return node_notifier;
+		    }
 		    ArcNotifier& notifier(Arc) const {
 		      return arc_notifier;
+		    }
 		    EdgeNotifier& notifier(Edge) const {
 		      return edge_notifier;
+		    }
 		    class NodeIt : public Node {
-		      const Digraph* digraph;
+		      const Graph* _graph;
 		    public:
 		      NodeIt() {}
 		      NodeIt(Invalid i) : Node(i) { }
 		      explicit NodeIt(const Digraph& _digraph) : digraph(&_digraph) {
 			_digraph.first(static_cast<Node&>(*this));
 		      explicit NodeIt(const Graph& graph) : _graph(&graph) {
 			_graph->first(static_cast<Node&>(*this));
+		      }
 		      NodeIt(const Digraph& _digraph, const Node& node)
 			: Node(node), digraph(&_digraph) {}
 		      NodeIt(const Graph& graph, const Node& node)
 			: Node(node), _graph(&graph) {}
 		      NodeIt& operator++() {
-			digraph->next(*this);
+			_graph->next(*this);
 			return *this;
+		      }
 		    };
 		    class ArcIt : public Arc {
-		      const Digraph* digraph;
+		      const Graph* _graph;
 		    public:
 		      ArcIt() { }
 		      ArcIt(Invalid i) : Arc(i) { }
 		      explicit ArcIt(const Digraph& _digraph) : digraph(&_digraph) {
 			_digraph.first(static_cast<Arc&>(*this));
 		      explicit ArcIt(const Graph& graph) : _graph(&graph) {
 			_graph->first(static_cast<Arc&>(*this));
+		      }
 		      ArcIt(const Digraph& _digraph, const Arc& e) :
 			Arc(e), digraph(&_digraph) { }
 		      ArcIt(const Graph& graph, const Arc& arc) :
 			Arc(arc), _graph(&graph) { }
 		      ArcIt& operator++() {
-			digraph->next(*this);
+			_graph->next(*this);
 			return *this;
+		      }
 		    };
 		    class OutArcIt : public Arc {
-		      const Digraph* digraph;
+		      const Graph* _graph;
 		    public:
 		      OutArcIt() { }
 		      OutArcIt(Invalid i) : Arc(i) { }
 		      OutArcIt(const Digraph& _digraph, const Node& node)
 			: digraph(&_digraph) {
-			_digraph.firstOut(*this, node);
+		      OutArcIt(const Graph& graph, const Node& node)
 			: _graph(&graph) {
 			_graph->firstOut(*this, node);
+		      }
 		      OutArcIt(const Digraph& _digraph, const Arc& arc)
 			: Arc(arc), digraph(&_digraph) {}
 		      OutArcIt(const Graph& graph, const Arc& arc)
 			: Arc(arc), _graph(&graph) {}
 		      OutArcIt& operator++() {
-			digraph->nextOut(*this);
+			_graph->nextOut(*this);
 			return *this;
+		      }
 		    };
 		    class InArcIt : public Arc {
-		      const Digraph* digraph;
+		      const Graph* _graph;
 		    public:
 		      InArcIt() { }
 		      InArcIt(Invalid i) : Arc(i) { }
 		      InArcIt(const Digraph& _digraph, const Node& node)
 			: digraph(&_digraph) {
-			_digraph.firstIn(*this, node);
+		      InArcIt(const Graph& graph, const Node& node)
 			: _graph(&graph) {
 			_graph->firstIn(*this, node);
+		      }
 		      InArcIt(const Digraph& _digraph, const Arc& arc) :
 			Arc(arc), digraph(&_digraph) {}
 		      InArcIt(const Graph& graph, const Arc& arc) :
 			Arc(arc), _graph(&graph) {}
 		      InArcIt& operator++() {
-			digraph->nextIn(*this);
+			_graph->nextIn(*this);
 			return *this;
+		      }
 		    };
 		    class EdgeIt : public Parent::Edge {
-		      const Digraph* digraph;
+		      const Graph* _graph;
 		    public:
 		      EdgeIt() { }
 		      EdgeIt(Invalid i) : Edge(i) { }
 		      explicit EdgeIt(const Digraph& _digraph) : digraph(&_digraph) {
 			_digraph.first(static_cast<Edge&>(*this));
 		      explicit EdgeIt(const Graph& graph) : _graph(&graph) {
 			_graph->first(static_cast<Edge&>(*this));
+		      }
 		      EdgeIt(const Digraph& _digraph, const Edge& e) :
 			Edge(e), digraph(&_digraph) { }
 		      EdgeIt(const Graph& graph, const Edge& edge) :
 			Edge(edge), _graph(&graph) { }
 		      EdgeIt& operator++() {
-			digraph->next(*this);
+			_graph->next(*this);
 			return *this;
+		      }
 		    };
-		    class IncArcIt : public Parent::Edge {
+		    class IncEdgeIt : public Parent::Edge {
 		      friend class GraphExtender;
 		      const Digraph* digraph;
 		      bool direction;
 		      const Graph* _graph;
 		      bool _direction;
 		    public:
-		      IncArcIt() { }
+		      IncEdgeIt() { }
-		      IncArcIt(Invalid i) : Edge(i), direction(false) { }
+		      IncEdgeIt(Invalid i) : Edge(i), _direction(false) { }
 		      IncArcIt(const Digraph& _digraph, const Node &n) : digraph(&_digraph) {
 			_digraph.firstInc(*this, direction, n);
 		      IncEdgeIt(const Graph& graph, const Node &node) : _graph(&graph) {
 			_graph->firstInc(*this, _direction, node);
+		      }
 		      IncArcIt(const Digraph& _digraph, const Edge &ue, const Node &n)
 			: digraph(&_digraph), Edge(ue) {
-			direction = (_digraph.source(ue) == n);
+		      IncEdgeIt(const Graph& graph, const Edge &edge, const Node &node)
 			: _graph(&graph), Edge(edge) {
 			_direction = (_graph->source(edge) == node);
+		      }
 		      IncArcIt& operator++() {
 			digraph->nextInc(*this, direction);
 		      IncEdgeIt& operator++() {
 			_graph->nextInc(*this, _direction);
 			return *this;
+		      }
 		    };
 		    /// \brief Base node of the iterator
 		    ///
 		    /// Returns the base node (ie. the source in this case) of the iterator
 		    Node baseNode(const OutArcIt &e) const {
 		      return Parent::source(static_cast<const Arc&>(e));
 		    Node baseNode(const OutArcIt &arc) const {
 		      return Parent::source(static_cast<const Arc&>(arc));
+		    }
 		    /// \brief Running node of the iterator
 		    ///
 		    /// Returns the running node (ie. the target in this case) of the
 		    /// iterator
 		    Node runningNode(const OutArcIt &e) const {
 		      return Parent::target(static_cast<const Arc&>(e));
 		    Node runningNode(const OutArcIt &arc) const {
 		      return Parent::target(static_cast<const Arc&>(arc));
+		    }
 		    /// \brief Base node of the iterator
 		    ///
 		    /// Returns the base node (ie. the target in this case) of the iterator
 		    Node baseNode(const InArcIt &e) const {
 		      return Parent::target(static_cast<const Arc&>(e));
 		    Node baseNode(const InArcIt &arc) const {
 		      return Parent::target(static_cast<const Arc&>(arc));
+		    }
 		    /// \brief Running node of the iterator
 		    ///
 		    /// Returns the running node (ie. the source in this case) of the
 		    /// iterator
 		    Node runningNode(const InArcIt &e) const {
 		      return Parent::source(static_cast<const Arc&>(e));
 		    Node runningNode(const InArcIt &arc) const {
 		      return Parent::source(static_cast<const Arc&>(arc));
+		    }
 		    /// Base node of the iterator
 		    ///
 		    /// Returns the base node of the iterator
 		    Node baseNode(const IncArcIt &e) const {
 		      return e.direction ? source(e) : target(e);
 		    Node baseNode(const IncEdgeIt &edge) const {
 		      return edge._direction ? source(edge) : target(edge);
+		    }
 		    /// Running node of the iterator
 		    ///
 		    /// Returns the running node of the iterator
 		    Node runningNode(const IncArcIt &e) const {
 		      return e.direction ? target(e) : source(e);
 		    Node runningNode(const IncEdgeIt &edge) const {
 		      return edge._direction ? target(edge) : source(edge);
+		    }
 		    // Mappable extension
 		    template <typename _Value>
 		    class NodeMap
-		      : public MapExtender<DefaultMap<Digraph, Node, _Value> > {
+		      : public MapExtender<DefaultMap<Graph, Node, _Value> > {
 		    public:
 		      typedef GraphExtender Digraph;
 		      typedef MapExtender<DefaultMap<Digraph, Node, _Value> > Parent;
 		      typedef GraphExtender Graph;
 		      typedef MapExtender<DefaultMap<Graph, Node, _Value> > Parent;
 		      NodeMap(const Digraph& digraph)
 			: Parent(digraph) {}
 		      NodeMap(const Digraph& digraph, const _Value& value)
 			: Parent(digraph, value) {}
 		      NodeMap(const Graph& graph)
 			: Parent(graph) {}
 		      NodeMap(const Graph& graph, const _Value& value)
 			: Parent(graph, value) {}
 		      NodeMap& operator=(const NodeMap& cmap) {
 			return operator=<NodeMap>(cmap);
+		      }
 		      template <typename CMap>
 		      NodeMap& operator=(const CMap& cmap) {
 		        Parent::operator=(cmap);
 			return *this;
+		      }
 		    };
 		    template <typename _Value>
 		    class ArcMap
-		      : public MapExtender<DefaultMap<Digraph, Arc, _Value> > {
+		      : public MapExtender<DefaultMap<Graph, Arc, _Value> > {
 		    public:
 		      typedef GraphExtender Digraph;
 		      typedef MapExtender<DefaultMap<Digraph, Arc, _Value> > Parent;
 		      typedef GraphExtender Graph;
 		      typedef MapExtender<DefaultMap<Graph, Arc, _Value> > Parent;
 		      ArcMap(const Digraph& digraph)
 			: Parent(digraph) {}
 		      ArcMap(const Digraph& digraph, const _Value& value)
 			: Parent(digraph, value) {}
 		      ArcMap(const Graph& graph)
 			: Parent(graph) {}
 		      ArcMap(const Graph& graph, const _Value& value)
 			: Parent(graph, value) {}
 		      ArcMap& operator=(const ArcMap& cmap) {
 			return operator=<ArcMap>(cmap);
+		      }
 		      template <typename CMap>
 		      ArcMap& operator=(const CMap& cmap) {
 		        Parent::operator=(cmap);
 			return *this;
+		      }
 		    };
 		    template <typename _Value>
 		    class EdgeMap
-		      : public MapExtender<DefaultMap<Digraph, Edge, _Value> > {
+		      : public MapExtender<DefaultMap<Graph, Edge, _Value> > {
 		    public:
 		      typedef GraphExtender Digraph;
 		      typedef MapExtender<DefaultMap<Digraph, Edge, _Value> > Parent;
 		      typedef GraphExtender Graph;
 		      typedef MapExtender<DefaultMap<Graph, Edge, _Value> > Parent;
 		      EdgeMap(const Digraph& digraph)
 			: Parent(digraph) {}
 		      EdgeMap(const Graph& graph)
 			: Parent(graph) {}
 		      EdgeMap(const Digraph& digraph, const _Value& value)
 			: Parent(digraph, value) {}
 		      EdgeMap(const Graph& graph, const _Value& value)
 			: Parent(graph, value) {}
 		      EdgeMap& operator=(const EdgeMap& cmap) {
 			return operator=<EdgeMap>(cmap);
+		      }
 		      template <typename CMap>
 		      EdgeMap& operator=(const CMap& cmap) {
 		        Parent::operator=(cmap);
 			return *this;
+		      }
 		    };
 		    // Alteration extension
 		    Node addNode() {
 		      Node node = Parent::addNode();
 		      notifier(Node()).add(node);
 		      return node;
+		    }
 		    Edge addEdge(const Node& from, const Node& to) {
 		      Edge edge = Parent::addEdge(from, to);
 		      notifier(Edge()).add(edge);
 		      std::vector<Arc> ev;
 		      ev.push_back(Parent::direct(edge, true));
 		      ev.push_back(Parent::direct(edge, false));
 		      notifier(Arc()).add(ev);
 		      return edge;
+		    }
 		    void clear() {
 		      notifier(Arc()).clear();
 		      notifier(Edge()).clear();
 		      notifier(Node()).clear();
 		      Parent::clear();
+		    }
 		    template <typename Digraph, typename NodeRefMap, typename EdgeRefMap>
 		    void build(const Digraph& digraph, NodeRefMap& nodeRef,
 		    template <typename Graph, typename NodeRefMap, typename EdgeRefMap>
 		    void build(const Graph& graph, NodeRefMap& nodeRef,
 		               EdgeRefMap& edgeRef) {
-		      Parent::build(digraph, nodeRef, edgeRef);
+		      Parent::build(graph, nodeRef, edgeRef);
 		      notifier(Node()).build();
 		      notifier(Edge()).build();
 		      notifier(Arc()).build();
+		    }
 		    void erase(const Node& node) {
 		      Arc arc;
 		      Parent::firstOut(arc, node);
 		      while (arc != INVALID ) {
 			erase(arc);
 			Parent::firstOut(arc, node);
+		      }
 		      Parent::firstIn(arc, node);
 		      while (arc != INVALID ) {
 			erase(arc);
 			Parent::firstIn(arc, node);
+		      }
 		      notifier(Node()).erase(node);
 		      Parent::erase(node);
+		    }
 		    void erase(const Edge& edge) {
 		      std::vector<Arc> ev;
 		      ev.push_back(Parent::direct(edge, true));
 		      ev.push_back(Parent::direct(edge, false));
 		      notifier(Arc()).erase(ev);
 		      std::vector<Arc> av;
 		      av.push_back(Parent::direct(edge, true));
 		      av.push_back(Parent::direct(edge, false));
 		      notifier(Arc()).erase(av);
 		      notifier(Edge()).erase(edge);
 		      Parent::erase(edge);
+		    }
 		    GraphExtender() {
 		      node_notifier.setContainer(*this);
 		      arc_notifier.setContainer(*this);
 		      edge_notifier.setContainer(*this);
+		    }
 		    ~GraphExtender() {
 		      edge_notifier.clear();
 		      arc_notifier.clear();
 		      node_notifier.clear();
+		    }
 		  };
+		}
 		#endif

lemon/concepts/graph.h

Show inline comments

 		/* -*- C++ -*-
+		 *
 		 * This file is a part of LEMON, a generic C++ optimization library
+		 *
 		 * Copyright (C) 2003-2007
 		 * Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport
 		 * (Egervary Research Group on Combinatorial Optimization, EGRES).
+		 *
 		 * Permission to use, modify and distribute this software is granted
 		 * provided that this copyright notice appears in all copies. For
 		 * precise terms see the accompanying LICENSE file.
+		 *
 		 * This software is provided "AS IS" with no warranty of any kind,
 		 * express or implied, and with no claim as to its suitability for any
 		 * purpose.
+		 *
 		 */
 		///\ingroup graph_concepts
 		///\file
 		///\brief The concept of Undirected Graphs.
 		#ifndef LEMON_CONCEPT_GRAPH_H
 		#define LEMON_CONCEPT_GRAPH_H
 		#include <lemon/concepts/graph_components.h>
 		#include <lemon/concepts/graph.h>
 		#include <lemon/bits/utility.h>
 		namespace lemon {
 		  namespace concepts {
 		    /// \ingroup graph_concepts
 		    ///
 		    /// \brief Class describing the concept of Undirected Graphs.
 		    ///
 		    /// This class describes the common interface of all Undirected
 		    /// Graphs.
 		    ///
 		    /// As all concept describing classes it provides only interface
 		    /// without any sensible implementation. So any algorithm for
 		    /// undirected graph should compile with this class, but it will not
 		    /// run properly, of course.
 		    ///
 		    /// The LEMON undirected graphs also fulfill the concept of
 		    /// directed graphs (\ref lemon::concepts::Digraph "Digraph
 		    /// Concept"). Each edges can be seen as two opposite
 		    /// directed arc and consequently the undirected graph can be
 		    /// seen as the direceted graph of these directed arcs. The
 		    /// Graph has the Edge inner class for the edges and
 		    /// the Arc type for the directed arcs. The Arc type is
 		    /// convertible to Edge or inherited from it so from a directed
 		    /// arc we can get the represented edge.
 		    ///
 		    /// In the sense of the LEMON each edge has a default
 		    /// direction (it should be in every computer implementation,
 		    /// because the order of edge's nodes defines an
 		    /// orientation). With the default orientation we can define that
 		    /// the directed arc is forward or backward directed. With the \c
 		    /// direction() and \c direct() function we can get the direction
 		    /// of the directed arc and we can direct an edge.
 		    ///
 		    /// The EdgeIt is an iterator for the edges. We can use
 		    /// the EdgeMap to map values for the edges. The InArcIt and
 		    /// OutArcIt iterates on the same edges but with opposite
-		    /// direction. The IncArcIt iterates also on the same edges
+		    /// direction. The IncEdgeIt iterates also on the same edges
 		    /// as the OutArcIt and InArcIt but it is not convertible to Arc just
 		    /// to Edge.
 		    class Graph {
 		    public:
 		      /// \brief The undirected graph should be tagged by the
 		      /// UndirectedTag.
 		      ///
 		      /// The undirected graph should be tagged by the UndirectedTag. This
 		      /// tag helps the enable_if technics to make compile time
 		      /// specializations for undirected graphs.
 		      typedef True UndirectedTag;
 		      /// \brief The base type of node iterators,
 		      /// or in other words, the trivial node iterator.
 		      ///
 		      /// This is the base type of each node iterator,
 		      /// thus each kind of node iterator converts to this.
 		      /// More precisely each kind of node iterator should be inherited
 		      /// from the trivial node iterator.
 		      class Node {
 		      public:
 		        /// Default constructor
 		        /// @warning The default constructor sets the iterator
 		        /// to an undefined value.
 		        Node() { }
 		        /// Copy constructor.
 		        /// Copy constructor.
 		        ///
 		        Node(const Node&) { }
 		        /// Invalid constructor \& conversion.
 		        /// This constructor initializes the iterator to be invalid.
 		        /// \sa Invalid for more details.
 		        Node(Invalid) { }
 		        /// Equality operator
 		        /// Two iterators are equal if and only if they point to the
 		        /// same object or both are invalid.
 		        bool operator==(Node) const { return true; }
 		        /// Inequality operator
 		        /// \sa operator==(Node n)
 		        ///
 		        bool operator!=(Node) const { return true; }
 			/// Artificial ordering operator.
 			/// To allow the use of graph descriptors as key type in std::map or
 			/// similar associative container we require this.
 			///
 			/// \note This operator only have to define some strict ordering of
 			/// the items; this order has nothing to do with the iteration
 			/// ordering of the items.
 			bool operator<(Node) const { return false; }
 		      };
 		      /// This iterator goes through each node.
 		      /// This iterator goes through each node.
 		      /// Its usage is quite simple, for example you can count the number
 		      /// of nodes in graph \c g of type \c Graph like this:
 		      ///\code
 		      /// int count=0;
 		      /// for (Graph::NodeIt n(g); n!=INVALID; ++n) ++count;
 		      ///\endcode
 		      class NodeIt : public Node {
 		      public:
 		        /// Default constructor
 		        /// @warning The default constructor sets the iterator
 		        /// to an undefined value.
 		        NodeIt() { }
 		        /// Copy constructor.
 		        /// Copy constructor.
 		        ///
 		        NodeIt(const NodeIt& n) : Node(n) { }
 		        /// Invalid constructor \& conversion.
 		        /// Initialize the iterator to be invalid.
 		        /// \sa Invalid for more details.
 		        NodeIt(Invalid) { }
 		        /// Sets the iterator to the first node.
 		        /// Sets the iterator to the first node of \c g.
 		        ///
 		        NodeIt(const Graph&) { }
 		        /// Node -> NodeIt conversion.
 		        /// Sets the iterator to the node of \c the graph pointed by
 			/// the trivial iterator.
 		        /// This feature necessitates that each time we
 		        /// iterate the arc-set, the iteration order is the same.
 		        NodeIt(const Graph&, const Node&) { }
 		        /// Next node.
 		        /// Assign the iterator to the next node.
 		        ///
 		        NodeIt& operator++() { return *this; }
 		      };
 		      /// The base type of the edge iterators.
 		      /// The base type of the edge iterators.
 		      ///
 		      class Edge {
 		      public:
 		        /// Default constructor
 		        /// @warning The default constructor sets the iterator
 		        /// to an undefined value.
 		        Edge() { }
 		        /// Copy constructor.
 		        /// Copy constructor.
 		        ///
 		        Edge(const Edge&) { }
 		        /// Initialize the iterator to be invalid.
 		        /// Initialize the iterator to be invalid.
 		        ///
 		        Edge(Invalid) { }
 		        /// Equality operator
 		        /// Two iterators are equal if and only if they point to the
 		        /// same object or both are invalid.
 		        bool operator==(Edge) const { return true; }
 		        /// Inequality operator
 		        /// \sa operator==(Edge n)
 		        ///
 		        bool operator!=(Edge) const { return true; }
 			/// Artificial ordering operator.
 			/// To allow the use of graph descriptors as key type in std::map or
 			/// similar associative container we require this.
 			///
 			/// \note This operator only have to define some strict ordering of
 			/// the items; this order has nothing to do with the iteration
 			/// ordering of the items.
 			bool operator<(Edge) const { return false; }
 		      };
 		      /// This iterator goes through each edge.
 		      /// This iterator goes through each edge of a graph.
 		      /// Its usage is quite simple, for example you can count the number
 		      /// of edges in a graph \c g of type \c Graph as follows:
 		      ///\code
 		      /// int count=0;
 		      /// for(Graph::EdgeIt e(g); e!=INVALID; ++e) ++count;
 		      ///\endcode
 		      class EdgeIt : public Edge {
 		      public:
 		        /// Default constructor
 		        /// @warning The default constructor sets the iterator
 		        /// to an undefined value.
 		        EdgeIt() { }
 		        /// Copy constructor.
 		        /// Copy constructor.
 		        ///
 		        EdgeIt(const EdgeIt& e) : Edge(e) { }
 		        /// Initialize the iterator to be invalid.
 		        /// Initialize the iterator to be invalid.
 		        ///
 		        EdgeIt(Invalid) { }
 		        /// This constructor sets the iterator to the first edge.
 		        /// This constructor sets the iterator to the first edge.
 		        EdgeIt(const Graph&) { }
 		        /// Edge -> EdgeIt conversion
 		        /// Sets the iterator to the value of the trivial iterator.
 		        /// This feature necessitates that each time we
 		        /// iterate the edge-set, the iteration order is the
 			/// same.
 		        EdgeIt(const Graph&, const Edge&) { }
 		        /// Next edge
 		        /// Assign the iterator to the next edge.
 		        EdgeIt& operator++() { return *this; }
 		      };
 		      /// \brief This iterator goes trough the incident undirected
 		      /// arcs of a node.
 		      ///
 		      /// This iterator goes trough the incident edges
 		      /// of a certain node of a graph. You should assume that the
 		      /// loop arcs will be iterated twice.
 		      ///
 		      /// Its usage is quite simple, for example you can compute the
 		      /// degree (i.e. count the number of incident arcs of a node \c n
 		      /// in graph \c g of type \c Graph as follows.
 		      ///
 		      ///\code
 		      /// int count=0;
-		      /// for(Graph::IncArcIt e(g, n); e!=INVALID; ++e) ++count;
+		      /// for(Graph::IncEdgeIt e(g, n); e!=INVALID; ++e) ++count;
 		      ///\endcode
-		      class IncArcIt : public Edge {
+		      class IncEdgeIt : public Edge {
 		      public:
 		        /// Default constructor
 		        /// @warning The default constructor sets the iterator
 		        /// to an undefined value.
-		        IncArcIt() { }
+		        IncEdgeIt() { }
 		        /// Copy constructor.
 		        /// Copy constructor.
 		        ///
-		        IncArcIt(const IncArcIt& e) : Edge(e) { }
+		        IncEdgeIt(const IncEdgeIt& e) : Edge(e) { }
 		        /// Initialize the iterator to be invalid.
 		        /// Initialize the iterator to be invalid.
 		        ///
-		        IncArcIt(Invalid) { }
+		        IncEdgeIt(Invalid) { }
 		        /// This constructor sets the iterator to first incident arc.
 		        /// This constructor set the iterator to the first incident arc of
 		        /// the node.
 		        IncArcIt(const Graph&, const Node&) { }
 		        /// Edge -> IncArcIt conversion
 		        IncEdgeIt(const Graph&, const Node&) { }
 		        /// Edge -> IncEdgeIt conversion
 		        /// Sets the iterator to the value of the trivial iterator \c e.
 		        /// This feature necessitates that each time we
 		        /// iterate the arc-set, the iteration order is the same.
-		        IncArcIt(const Graph&, const Edge&) { }
+		        IncEdgeIt(const Graph&, const Edge&) { }
 		        /// Next incident arc
 		        /// Assign the iterator to the next incident arc
 			/// of the corresponding node.
-		        IncArcIt& operator++() { return *this; }
+		        IncEdgeIt& operator++() { return *this; }
 		      };
 		      /// The directed arc type.
 		      /// The directed arc type. It can be converted to the
 		      /// edge or it should be inherited from the undirected
 		      /// arc.
 		      class Arc : public Edge {
 		      public:
 		        /// Default constructor
 		        /// @warning The default constructor sets the iterator
 		        /// to an undefined value.
 		        Arc() { }
 		        /// Copy constructor.
 		        /// Copy constructor.
 		        ///
 		        Arc(const Arc& e) : Edge(e) { }
 		        /// Initialize the iterator to be invalid.
 		        /// Initialize the iterator to be invalid.
 		        ///
 		        Arc(Invalid) { }
 		        /// Equality operator
 		        /// Two iterators are equal if and only if they point to the
 		        /// same object or both are invalid.
 		        bool operator==(Arc) const { return true; }
 		        /// Inequality operator
 		        /// \sa operator==(Arc n)
 		        ///
 		        bool operator!=(Arc) const { return true; }
 			/// Artificial ordering operator.
 			/// To allow the use of graph descriptors as key type in std::map or
 			/// similar associative container we require this.
 			///
 			/// \note This operator only have to define some strict ordering of
 			/// the items; this order has nothing to do with the iteration
 			/// ordering of the items.
 			bool operator<(Arc) const { return false; }
 		      };
 		      /// This iterator goes through each directed arc.
 		      /// This iterator goes through each arc of a graph.
 		      /// Its usage is quite simple, for example you can count the number
 		      /// of arcs in a graph \c g of type \c Graph as follows:
 		      ///\code
 		      /// int count=0;
 		      /// for(Graph::ArcIt e(g); e!=INVALID; ++e) ++count;
 		      ///\endcode
 		      class ArcIt : public Arc {
 		      public:
 		        /// Default constructor
 		        /// @warning The default constructor sets the iterator
 		        /// to an undefined value.
 		        ArcIt() { }
 		        /// Copy constructor.
 		        /// Copy constructor.
 		        ///
 		        ArcIt(const ArcIt& e) : Arc(e) { }
 		        /// Initialize the iterator to be invalid.
 		        /// Initialize the iterator to be invalid.
 		        ///
 		        ArcIt(Invalid) { }
 		        /// This constructor sets the iterator to the first arc.
 		        /// This constructor sets the iterator to the first arc of \c g.
 		        ///@param g the graph
 		        ArcIt(const Graph &g) { ignore_unused_variable_warning(g); }
 		        /// Arc -> ArcIt conversion
 		        /// Sets the iterator to the value of the trivial iterator \c e.
 		        /// This feature necessitates that each time we
 		        /// iterate the arc-set, the iteration order is the same.
 		        ArcIt(const Graph&, const Arc&) { }
 		        ///Next arc
 		        /// Assign the iterator to the next arc.
 		        ArcIt& operator++() { return *this; }
 		      };
 		      /// This iterator goes trough the outgoing directed arcs of a node.
 		      /// This iterator goes trough the \e outgoing arcs of a certain node
 		      /// of a graph.
 		      /// Its usage is quite simple, for example you can count the number
 		      /// of outgoing arcs of a node \c n
 		      /// in graph \c g of type \c Graph as follows.
 		      ///\code
 		      /// int count=0;
 		      /// for (Graph::OutArcIt e(g, n); e!=INVALID; ++e) ++count;
 		      ///\endcode
 		      class OutArcIt : public Arc {
 		      public:
 		        /// Default constructor
 		        /// @warning The default constructor sets the iterator
 		        /// to an undefined value.
 		        OutArcIt() { }
 		        /// Copy constructor.
 		        /// Copy constructor.
 		        ///
 		        OutArcIt(const OutArcIt& e) : Arc(e) { }
 		        /// Initialize the iterator to be invalid.
 		        /// Initialize the iterator to be invalid.
 		        ///
 		        OutArcIt(Invalid) { }
 		        /// This constructor sets the iterator to the first outgoing arc.
 		        /// This constructor sets the iterator to the first outgoing arc of
 		        /// the node.
 		        ///@param n the node
 		        ///@param g the graph
 		        OutArcIt(const Graph& n, const Node& g) {
 			  ignore_unused_variable_warning(n);
 			  ignore_unused_variable_warning(g);
+			}
 		        /// Arc -> OutArcIt conversion
 		        /// Sets the iterator to the value of the trivial iterator.
 			/// This feature necessitates that each time we
 		        /// iterate the arc-set, the iteration order is the same.
 		        OutArcIt(const Graph&, const Arc&) { }
 		        ///Next outgoing arc
 		        /// Assign the iterator to the next
 		        /// outgoing arc of the corresponding node.
 		        OutArcIt& operator++() { return *this; }
 		      };
 		      /// This iterator goes trough the incoming directed arcs of a node.
 		      /// This iterator goes trough the \e incoming arcs of a certain node
 		      /// of a graph.
 		      /// Its usage is quite simple, for example you can count the number
 		      /// of outgoing arcs of a node \c n
 		      /// in graph \c g of type \c Graph as follows.
 		      ///\code
 		      /// int count=0;
 		      /// for(Graph::InArcIt e(g, n); e!=INVALID; ++e) ++count;
 		      ///\endcode
 		      class InArcIt : public Arc {
 		      public:
 		        /// Default constructor
 		        /// @warning The default constructor sets the iterator
 		        /// to an undefined value.
 		        InArcIt() { }
 		        /// Copy constructor.
 		        /// Copy constructor.
 		        ///
 		        InArcIt(const InArcIt& e) : Arc(e) { }
 		        /// Initialize the iterator to be invalid.
 		        /// Initialize the iterator to be invalid.
 		        ///
 		        InArcIt(Invalid) { }
 		        /// This constructor sets the iterator to first incoming arc.
 		        /// This constructor set the iterator to the first incoming arc of
 		        /// the node.
 		        ///@param n the node
 		        ///@param g the graph
 		        InArcIt(const Graph& g, const Node& n) {
 			  ignore_unused_variable_warning(n);
 			  ignore_unused_variable_warning(g);
+			}
 		        /// Arc -> InArcIt conversion
 		        /// Sets the iterator to the value of the trivial iterator \c e.
 		        /// This feature necessitates that each time we
 		        /// iterate the arc-set, the iteration order is the same.
 		        InArcIt(const Graph&, const Arc&) { }
 		        /// Next incoming arc
 		        /// Assign the iterator to the next inarc of the corresponding node.
 		        ///
 		        InArcIt& operator++() { return *this; }
 		      };
 		      /// \brief Read write map of the nodes to type \c T.
 		      ///
 		      /// ReadWrite map of the nodes to type \c T.
 		      /// \sa Reference
 		      template<class T>
 		      class NodeMap : public ReadWriteMap< Node, T >
+		      {
 		      public:
 		        ///\e
 		        NodeMap(const Graph&) { }
 		        ///\e
 		        NodeMap(const Graph&, T) { }
 		        ///Copy constructor
 		        NodeMap(const NodeMap& nm) : ReadWriteMap< Node, T >(nm) { }
 		        ///Assignment operator
 		        template <typename CMap>
 		        NodeMap& operator=(const CMap&) {
 		          checkConcept<ReadMap<Node, T>, CMap>();
 		          return *this;
+		        }
 		      };
 		      /// \brief Read write map of the directed arcs to type \c T.
 		      ///
 		      /// Reference map of the directed arcs to type \c T.
 		      /// \sa Reference
 		      template<class T>
 		      class ArcMap : public ReadWriteMap<Arc,T>
+		      {
 		      public:
 		        ///\e
 		        ArcMap(const Graph&) { }
 		        ///\e
 		        ArcMap(const Graph&, T) { }
 		        ///Copy constructor
 		        ArcMap(const ArcMap& em) : ReadWriteMap<Arc,T>(em) { }
 		        ///Assignment operator
 		        template <typename CMap>
 		        ArcMap& operator=(const CMap&) {
 		          checkConcept<ReadMap<Arc, T>, CMap>();
 		          return *this;
+		        }
 		      };
 		      /// Read write map of the edges to type \c T.
 		      /// Reference map of the arcs to type \c T.
 		      /// \sa Reference
 		      template<class T>
 		      class EdgeMap : public ReadWriteMap<Edge,T>
+		      {
 		      public:
 		        ///\e
 		        EdgeMap(const Graph&) { }
 		        ///\e
 		        EdgeMap(const Graph&, T) { }
 		        ///Copy constructor
 		        EdgeMap(const EdgeMap& em) : ReadWriteMap<Edge,T>(em) {}
 		        ///Assignment operator
 		        template <typename CMap>
 		        EdgeMap& operator=(const CMap&) {
 		          checkConcept<ReadMap<Edge, T>, CMap>();
 		          return *this;
+		        }
 		      };
 		      /// \brief Direct the given edge.
 		      ///
 		      /// Direct the given edge. The returned arc source
 		      /// will be the given node.
 		      Arc direct(const Edge&, const Node&) const {
 			return INVALID;
+		      }
 		      /// \brief Direct the given edge.
 		      ///
 		      /// Direct the given edge. The returned arc
 		      /// represents the given edge and the direction comes
 		      /// from the bool parameter. The source of the edge and
 		      /// the directed arc is the same when the given bool is true.
 		      Arc direct(const Edge&, bool) const {
 			return INVALID;
+		      }
 		      /// \brief Returns true if the arc has default orientation.
 		      ///
 		      /// Returns whether the given directed arc is same orientation as
 		      /// the corresponding edge's default orientation.
 		      bool direction(Arc) const { return true; }
 		      /// \brief Returns the opposite directed arc.
 		      ///
 		      /// Returns the opposite directed arc.
 		      Arc oppositeArc(Arc) const { return INVALID; }
 		      /// \brief Opposite node on an arc
 		      ///
 		      /// \return the opposite of the given Node on the given Edge
 		      Node oppositeNode(Node, Edge) const { return INVALID; }
 		      /// \brief First node of the edge.
 		      ///
 		      /// \return the first node of the given Edge.
 		      ///
 		      /// Naturally edges don't have direction and thus
 		      /// don't have source and target node. But we use these two methods
 		      /// to query the two nodes of the arc. The direction of the arc
 		      /// which arises this way is called the inherent direction of the
 		      /// edge, and is used to define the "default" direction
 		      /// of the directed versions of the arcs.
 		      /// \sa direction
 		      Node u(Edge) const { return INVALID; }
 		      /// \brief Second node of the edge.
 		      Node v(Edge) const { return INVALID; }
 		      /// \brief Source node of the directed arc.
 		      Node source(Arc) const { return INVALID; }
 		      /// \brief Target node of the directed arc.
 		      Node target(Arc) const { return INVALID; }
 		      /// \brief Returns the id of the node.
 		      int id(Node) const { return -1; }
 		      /// \brief Returns the id of the edge.
 		      int id(Edge) const { return -1; }
 		      /// \brief Returns the id of the arc.
 		      int id(Arc) const { return -1; }
 		      /// \brief Returns the node with the given id.
 		      ///
 		      /// \pre The argument should be a valid node id in the graph.
 		      Node nodeFromId(int) const { return INVALID; }
 		      /// \brief Returns the edge with the given id.
 		      ///
 		      /// \pre The argument should be a valid edge id in the graph.
 		      Edge edgeFromId(int) const { return INVALID; }
 		      /// \brief Returns the arc with the given id.
 		      ///
 		      /// \pre The argument should be a valid arc id in the graph.
 		      Arc arcFromId(int) const { return INVALID; }
 		      /// \brief Returns an upper bound on the node IDs.
 		      int maxNodeId() const { return -1; }
 		      /// \brief Returns an upper bound on the edge IDs.
 		      int maxEdgeId() const { return -1; }
 		      /// \brief Returns an upper bound on the arc IDs.
 		      int maxArcId() const { return -1; }
 		      void first(Node&) const {}
 		      void next(Node&) const {}
 		      void first(Edge&) const {}
 		      void next(Edge&) const {}
 		      void first(Arc&) const {}
 		      void next(Arc&) const {}
 		      void firstOut(Arc&, Node) const {}
 		      void nextOut(Arc&) const {}
 		      void firstIn(Arc&, Node) const {}
 		      void nextIn(Arc&) const {}
 		      void firstInc(Edge &, bool &, const Node &) const {}
 		      void nextInc(Edge &, bool &) const {}
 		      // The second parameter is dummy.
 		      Node fromId(int, Node) const { return INVALID; }
 		      // The second parameter is dummy.
 		      Edge fromId(int, Edge) const { return INVALID; }
 		      // The second parameter is dummy.
 		      Arc fromId(int, Arc) const { return INVALID; }
 		      // Dummy parameter.
 		      int maxId(Node) const { return -1; }
 		      // Dummy parameter.
 		      int maxId(Edge) const { return -1; }
 		      // Dummy parameter.
 		      int maxId(Arc) const { return -1; }
 		      /// \brief Base node of the iterator
 		      ///
 		      /// Returns the base node (the source in this case) of the iterator
 		      Node baseNode(OutArcIt e) const {
 			return source(e);
+		      }
 		      /// \brief Running node of the iterator
 		      ///
 		      /// Returns the running node (the target in this case) of the
 		      /// iterator
 		      Node runningNode(OutArcIt e) const {
 			return target(e);
+		      }
 		      /// \brief Base node of the iterator
 		      ///
 		      /// Returns the base node (the target in this case) of the iterator
 		      Node baseNode(InArcIt e) const {
 			return target(e);
+		      }
 		      /// \brief Running node of the iterator
 		      ///
 		      /// Returns the running node (the source in this case) of the
 		      /// iterator
 		      Node runningNode(InArcIt e) const {
 			return source(e);
+		      }
 		      /// \brief Base node of the iterator
 		      ///
 		      /// Returns the base node of the iterator
-		      Node baseNode(IncArcIt) const {
+		      Node baseNode(IncEdgeIt) const {
 			return INVALID;
+		      }
 		      /// \brief Running node of the iterator
 		      ///
 		      /// Returns the running node of the iterator
-		      Node runningNode(IncArcIt) const {
+		      Node runningNode(IncEdgeIt) const {
 			return INVALID;
+		      }
 		      template <typename Graph>
 		      struct Constraints {
 			void constraints() {
 			  checkConcept<IterableGraphComponent<>, Graph>();
 			  checkConcept<IDableGraphComponent<>, Graph>();
 			  checkConcept<MappableGraphComponent<>, Graph>();
+			}
 		      };
 		    };
+		  }
+		}
 		#endif

lemon/concepts/graph_components.h

Show inline comments

 		/* -*- C++ -*-
+		 *
 		 * This file is a part of LEMON, a generic C++ optimization library
+		 *
 		 * Copyright (C) 2003-2007
 		 * Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport
 		 * (Egervary Research Group on Combinatorial Optimization, EGRES).
+		 *
 		 * Permission to use, modify and distribute this software is granted
 		 * provided that this copyright notice appears in all copies. For
 		 * precise terms see the accompanying LICENSE file.
+		 *
 		 * This software is provided "AS IS" with no warranty of any kind,
 		 * express or implied, and with no claim as to its suitability for any
 		 * purpose.
+		 *
 		 */
 		///\ingroup graph_concepts
 		///\file
 		///\brief The concept of graph components.
 		#ifndef LEMON_CONCEPT_GRAPH_COMPONENTS_H
 		#define LEMON_CONCEPT_GRAPH_COMPONENTS_H
 		#include <lemon/bits/invalid.h>
 		#include <lemon/concepts/maps.h>
 		#include <lemon/bits/alteration_notifier.h>
 		namespace lemon {
 		  namespace concepts {
 		    /// \brief Skeleton class for graph Node and Arc types
 		    ///
 		    /// This class describes the interface of Node and Arc (and Edge
 		    /// in undirected graphs) subtypes of graph types.
 		    ///
 		    /// \note This class is a template class so that we can use it to
 		    /// create graph skeleton classes. The reason for this is than Node
 		    /// and Arc types should \em not derive from the same base class.
 		    /// For Node you should instantiate it with character 'n' and for Arc
 		    /// with 'a'.
 		#ifndef DOXYGEN
 		    template <char _selector = '0'>
 		#endif
 		    class GraphItem {
 		    public:
 		      /// \brief Default constructor.
 		      ///
 		      /// \warning The default constructor is not required to set
 		      /// the item to some well-defined value. So you should consider it
 		      /// as uninitialized.
 		      GraphItem() {}
 		      /// \brief Copy constructor.
 		      ///
 		      /// Copy constructor.
 		      ///
 		      GraphItem(const GraphItem &) {}
 		      /// \brief Invalid constructor \& conversion.
 		      ///
 		      /// This constructor initializes the item to be invalid.
 		      /// \sa Invalid for more details.
 		      GraphItem(Invalid) {}
 		      /// \brief Assign operator for nodes.
 		      ///
 		      /// The nodes are assignable.
 		      ///
 		      GraphItem& operator=(GraphItem const&) { return *this; }
 		      /// \brief Equality operator.
 		      ///
 		      /// Two iterators are equal if and only if they represents the
 		      /// same node in the graph or both are invalid.
 		      bool operator==(GraphItem) const { return false; }
 		      /// \brief Inequality operator.
 		      ///
 		      /// \sa operator==(const Node& n)
 		      ///
 		      bool operator!=(GraphItem) const { return false; }
 		      /// \brief Artificial ordering operator.
 		      ///
 		      /// To allow the use of graph descriptors as key type in std::map or
 		      /// similar associative container we require this.
 		      ///
 		      /// \note This operator only have to define some strict ordering of
 		      /// the items; this order has nothing to do with the iteration
 		      /// ordering of the items.
 		      bool operator<(GraphItem) const { return false; }
 		      template<typename _GraphItem>
 		      struct Constraints {
 			void constraints() {
 			  _GraphItem i1;
 			  _GraphItem i2 = i1;
 			  _GraphItem i3 = INVALID;
 			  i1 = i2 = i3;
 			  bool b;
 			  //	  b = (ia == ib) && (ia != ib) && (ia < ib);
 			  b = (ia == ib) && (ia != ib);
 			  b = (ia == INVALID) && (ib != INVALID);
 		          b = (ia < ib);
+			}
 			const _GraphItem &ia;
 			const _GraphItem &ib;
 		      };
 		    };
 		    /// \brief An empty base directed graph class.
 		    ///
 		    /// This class provides the minimal set of features needed for a
 		    /// directed graph structure. All digraph concepts have to be
 		    /// conform to this base directed graph. It just provides types
 		    /// for nodes and arcs and functions to get the source and the
 		    /// target of the arcs.
 		    class BaseDigraphComponent {
 		    public:
 		      typedef BaseDigraphComponent Digraph;
 		      /// \brief Node class of the digraph.
 		      ///
 		      /// This class represents the Nodes of the digraph.
 		      ///
 		      typedef GraphItem<'n'> Node;
 		      /// \brief Arc class of the digraph.
 		      ///
 		      /// This class represents the Arcs of the digraph.
 		      ///
 		      typedef GraphItem<'e'> Arc;
 		      /// \brief Gives back the target node of an arc.
 		      ///
 		      /// Gives back the target node of an arc.
 		      ///
 		      Node target(const Arc&) const { return INVALID;}
 		      /// \brief Gives back the source node of an arc.
 		      ///
 		      /// Gives back the source node of an arc.
 		      ///
 		      Node source(const Arc&) const { return INVALID;}
 		      /// \brief Gives back the opposite node on the given arc.
 		      ///
 		      /// Gives back the opposite node on the given arc.
 		      Node oppositeNode(const Node&, const Arc&) const {
 		        return INVALID;
+		      }
 		      template <typename _Digraph>
 		      struct Constraints {
 			typedef typename _Digraph::Node Node;
 			typedef typename _Digraph::Arc Arc;
 			void constraints() {
 			  checkConcept<GraphItem<'n'>, Node>();
 			  checkConcept<GraphItem<'a'>, Arc>();
+			  {
 			    Node n;
 			    Arc e(INVALID);
 			    n = digraph.source(e);
 			    n = digraph.target(e);
 		            n = digraph.oppositeNode(n, e);
+			  }
+			}
 			const _Digraph& digraph;
 		      };
 		    };
 		    /// \brief An empty base undirected graph class.
 		    ///
 		    /// This class provides the minimal set of features needed for an
 		    /// undirected graph structure. All undirected graph concepts have
 		    /// to be conform to this base graph. It just provides types for
 		    /// nodes, arcs and edges and functions to get the
 		    /// source and the target of the arcs and edges,
 		    /// conversion from arcs to edges and function to get
 		    /// both direction of the edges.
 		    class BaseGraphComponent : public BaseDigraphComponent {
 		    public:
 		      typedef BaseDigraphComponent::Node Node;
 		      typedef BaseDigraphComponent::Arc Arc;
 		      /// \brief Undirected arc class of the graph.
 		      ///
 		      /// This class represents the edges of the graph.
 		      /// The undirected graphs can be used as a directed graph which
 		      /// for each arc contains the opposite arc too so the graph is
 		      /// bidirected. The edge represents two opposite
 		      /// directed arcs.
 		      class Edge : public GraphItem<'u'> {
 		      public:
 		        typedef GraphItem<'u'> Parent;
 		        /// \brief Default constructor.
 		        ///
 		        /// \warning The default constructor is not required to set
 		        /// the item to some well-defined value. So you should consider it
 		        /// as uninitialized.
 		        Edge() {}
 		        /// \brief Copy constructor.
 		        ///
 		        /// Copy constructor.
 		        ///
 		        Edge(const Edge &) : Parent() {}
 		        /// \brief Invalid constructor \& conversion.
 		        ///
 		        /// This constructor initializes the item to be invalid.
 		        /// \sa Invalid for more details.
 		        Edge(Invalid) {}
 		        /// \brief Converter from arc to edge.
 		        ///
 		        /// Besides the core graph item functionality each arc should
 		        /// be convertible to the represented edge.
 		        Edge(const Arc&) {}
 		        /// \brief Assign arc to edge.
 		        ///
 		        /// Besides the core graph item functionality each arc should
 		        /// be convertible to the represented edge.
 		        Edge& operator=(const Arc&) { return *this; }
 		      };
 		      /// \brief Returns the direction of the arc.
 		      ///
 		      /// Returns the direction of the arc. Each arc represents an
 		      /// edge with a direction. It gives back the
 		      /// direction.
 		      bool direction(const Arc&) const { return true; }
 		      /// \brief Returns the directed arc.
 		      ///
 		      /// Returns the directed arc from its direction and the
 		      /// represented edge.
 		      Arc direct(const Edge&, bool) const { return INVALID;}
 		      /// \brief Returns the directed arc.
 		      ///
 		      /// Returns the directed arc from its source and the
 		      /// represented edge.
 		      Arc direct(const Edge&, const Node&) const { return INVALID;}
 		      /// \brief Returns the opposite arc.
 		      ///
 		      /// Returns the opposite arc. It is the arc representing the
 		      /// same edge and has opposite direction.
 		      Arc oppositeArc(const Arc&) const { return INVALID;}
 		      /// \brief Gives back one ending of an edge.
 		      ///
 		      /// Gives back one ending of an edge.
 		      Node u(const Edge&) const { return INVALID;}
 		      /// \brief Gives back the other ending of an edge.
 		      ///
 		      /// Gives back the other ending of an edge.
 		      Node v(const Edge&) const { return INVALID;}
 		      template <typename _Graph>
 		      struct Constraints {
 			typedef typename _Graph::Node Node;
 			typedef typename _Graph::Arc Arc;
 			typedef typename _Graph::Edge Edge;
 			void constraints() {
 		          checkConcept<BaseDigraphComponent, _Graph>();
 			  checkConcept<GraphItem<'u'>, Edge>();
+			  {
 			    Node n;
 			    Edge ue(INVALID);
 		            Arc e;
 			    n = graph.u(ue);
 			    n = graph.v(ue);
 		            e = graph.direct(ue, true);
 		            e = graph.direct(ue, n);
 		            e = graph.oppositeArc(e);
 		            ue = e;
 		            bool d = graph.direction(e);
 		            ignore_unused_variable_warning(d);
+			  }
+			}
 			const _Graph& graph;
 		      };
 		    };
 		    /// \brief An empty idable base digraph class.
 		    ///
 		    /// This class provides beside the core digraph features
 		    /// core id functions for the digraph structure.
 		    /// The most of the base digraphs should be conform to this concept.
 		    /// The id's are unique and immutable.
 		    template <typename _Base = BaseDigraphComponent>
 		    class IDableDigraphComponent : public _Base {
 		    public:
 		      typedef _Base Base;
 		      typedef typename Base::Node Node;
 		      typedef typename Base::Arc Arc;
 		      /// \brief Gives back an unique integer id for the Node.
 		      ///
 		      /// Gives back an unique integer id for the Node.
 		      ///
 		      int id(const Node&) const { return -1;}
 		      /// \brief Gives back the node by the unique id.
 		      ///
 		      /// Gives back the node by the unique id.
 		      /// If the digraph does not contain node with the given id
 		      /// then the result of the function is undetermined.
 		      Node nodeFromId(int) const { return INVALID;}
 		      /// \brief Gives back an unique integer id for the Arc.
 		      ///
 		      /// Gives back an unique integer id for the Arc.
 		      ///
 		      int id(const Arc&) const { return -1;}
 		      /// \brief Gives back the arc by the unique id.
 		      ///
 		      /// Gives back the arc by the unique id.
 		      /// If the digraph does not contain arc with the given id
 		      /// then the result of the function is undetermined.
 		      Arc arcFromId(int) const { return INVALID;}
 		      /// \brief Gives back an integer greater or equal to the maximum
 		      /// Node id.
 		      ///
 		      /// Gives back an integer greater or equal to the maximum Node
 		      /// id.
 		      int maxNodeId() const { return -1;}
 		      /// \brief Gives back an integer greater or equal to the maximum
 		      /// Arc id.
 		      ///
 		      /// Gives back an integer greater or equal to the maximum Arc
 		      /// id.
 		      int maxArcId() const { return -1;}
 		      template <typename _Digraph>
 		      struct Constraints {
 			void constraints() {
 			  checkConcept<Base, _Digraph >();
 			  typename _Digraph::Node node;
 			  int nid = digraph.id(node);
 			  nid = digraph.id(node);
 			  node = digraph.nodeFromId(nid);
 			  typename _Digraph::Arc arc;
 			  int eid = digraph.id(arc);
 			  eid = digraph.id(arc);
 			  arc = digraph.arcFromId(eid);
 			  nid = digraph.maxNodeId();
 			  ignore_unused_variable_warning(nid);
 			  eid = digraph.maxArcId();
 			  ignore_unused_variable_warning(eid);
+			}
 			const _Digraph& digraph;
 		      };
 		    };
 		    /// \brief An empty idable base undirected graph class.
 		    ///
 		    /// This class provides beside the core undirected graph features
 		    /// core id functions for the undirected graph structure.  The
 		    /// most of the base undirected graphs should be conform to this
 		    /// concept.  The id's are unique and immutable.
 		    template <typename _Base = BaseGraphComponent>
 		    class IDableGraphComponent : public IDableDigraphComponent<_Base> {
 		    public:
 		      typedef _Base Base;
 		      typedef typename Base::Edge Edge;
 		      using IDableDigraphComponent<_Base>::id;
 		      /// \brief Gives back an unique integer id for the Edge.
 		      ///
 		      /// Gives back an unique integer id for the Edge.
 		      ///
 		      int id(const Edge&) const { return -1;}
 		      /// \brief Gives back the edge by the unique id.
 		      ///
 		      /// Gives back the edge by the unique id.  If the
 		      /// graph does not contain arc with the given id then the
 		      /// result of the function is undetermined.
 		      Edge edgeFromId(int) const { return INVALID;}
 		      /// \brief Gives back an integer greater or equal to the maximum
 		      /// Edge id.
 		      ///
 		      /// Gives back an integer greater or equal to the maximum Edge
 		      /// id.
 		      int maxEdgeId() const { return -1;}
 		      template <typename _Graph>
 		      struct Constraints {
 			void constraints() {
 			  checkConcept<Base, _Graph >();
 			  checkConcept<IDableDigraphComponent<Base>, _Graph >();
 			  typename _Graph::Edge edge;
 			  int ueid = graph.id(edge);
 			  ueid = graph.id(edge);
 			  edge = graph.edgeFromId(ueid);
 			  ueid = graph.maxEdgeId();
 			  ignore_unused_variable_warning(ueid);
+			}
 			const _Graph& graph;
 		      };
 		    };
 		    /// \brief Skeleton class for graph NodeIt and ArcIt
 		    ///
 		    /// Skeleton class for graph NodeIt and ArcIt.
 		    ///
 		    template <typename _Graph, typename _Item>
 		    class GraphItemIt : public _Item {
 		    public:
 		      /// \brief Default constructor.
 		      ///
 		      /// @warning The default constructor sets the iterator
 		      /// to an undefined value.
 		      GraphItemIt() {}
 		      /// \brief Copy constructor.
 		      ///
 		      /// Copy constructor.
 		      ///
 		      GraphItemIt(const GraphItemIt& ) {}
 		      /// \brief Sets the iterator to the first item.
 		      ///
 		      /// Sets the iterator to the first item of \c the graph.
 		      ///
 		      explicit GraphItemIt(const _Graph&) {}
 		      /// \brief Invalid constructor \& conversion.
 		      ///
 		      /// This constructor initializes the item to be invalid.
 		      /// \sa Invalid for more details.
 		      GraphItemIt(Invalid) {}
 		      /// \brief Assign operator for items.
 		      ///
 		      /// The items are assignable.
 		      ///
 		      GraphItemIt& operator=(const GraphItemIt&) { return *this; }
 		      /// \brief Next item.
 		      ///
 		      /// Assign the iterator to the next item.
 		      ///
 		      GraphItemIt& operator++() { return *this; }
 		      /// \brief Equality operator
 		      ///
 		      /// Two iterators are equal if and only if they point to the
 		      /// same object or both are invalid.
 		      bool operator==(const GraphItemIt&) const { return true;}
 		      /// \brief Inequality operator
 		      ///
 		      /// \sa operator==(Node n)
 		      ///
 		      bool operator!=(const GraphItemIt&) const { return true;}
 		      template<typename _GraphItemIt>
 		      struct Constraints {
 			void constraints() {
 			  _GraphItemIt it1(g);
 			  _GraphItemIt it2;
 			  it2 = ++it1;
 			  ++it2 = it1;
 			  ++(++it1);
 			  _Item bi = it1;
 			  bi = it2;
+			}
 			_Graph& g;
 		      };
 		    };
 		    /// \brief Skeleton class for graph InArcIt and OutArcIt
 		    ///
 		    /// \note Because InArcIt and OutArcIt may not inherit from the same
 		    /// base class, the _selector is a additional template parameter. For
 		    /// InArcIt you should instantiate it with character 'i' and for
 		    /// OutArcIt with 'o'.
 		    template <typename _Graph,
 			      typename _Item = typename _Graph::Arc,
 		              typename _Base = typename _Graph::Node,
 			      char _selector = '0'>
 		    class GraphIncIt : public _Item {
 		    public:
 		      /// \brief Default constructor.
 		      ///
 		      /// @warning The default constructor sets the iterator
 		      /// to an undefined value.
 		      GraphIncIt() {}
 		      /// \brief Copy constructor.
 		      ///
 		      /// Copy constructor.
 		      ///
 		      GraphIncIt(GraphIncIt const& gi) : _Item(gi) {}
 		      /// \brief Sets the iterator to the first arc incoming into or outgoing
 		      /// from the node.
 		      ///
 		      /// Sets the iterator to the first arc incoming into or outgoing
 		      /// from the node.
 		      ///
 		      explicit GraphIncIt(const _Graph&, const _Base&) {}
 		      /// \brief Invalid constructor \& conversion.
 		      ///
 		      /// This constructor initializes the item to be invalid.
 		      /// \sa Invalid for more details.
 		      GraphIncIt(Invalid) {}
 		      /// \brief Assign operator for iterators.
 		      ///
 		      /// The iterators are assignable.
 		      ///
 		      GraphIncIt& operator=(GraphIncIt const&) { return *this; }
 		      /// \brief Next item.
 		      ///
 		      /// Assign the iterator to the next item.
 		      ///
 		      GraphIncIt& operator++() { return *this; }
 		      /// \brief Equality operator
 		      ///
 		      /// Two iterators are equal if and only if they point to the
 		      /// same object or both are invalid.
 		      bool operator==(const GraphIncIt&) const { return true;}
 		      /// \brief Inequality operator
 		      ///
 		      /// \sa operator==(Node n)
 		      ///
 		      bool operator!=(const GraphIncIt&) const { return true;}
 		      template <typename _GraphIncIt>
 		      struct Constraints {
 			void constraints() {
 			  checkConcept<GraphItem<_selector>, _GraphIncIt>();
 			  _GraphIncIt it1(graph, node);
 			  _GraphIncIt it2;
 			  it2 = ++it1;
 			  ++it2 = it1;
 			  ++(++it1);
 			  _Item e = it1;
 			  e = it2;
+			}
 			_Item arc;
 			_Base node;
 			_Graph graph;
 			_GraphIncIt it;
 		      };
 		    };
 		    /// \brief An empty iterable digraph class.
 		    ///
 		    /// This class provides beside the core digraph features
 		    /// iterator based iterable interface for the digraph structure.
 		    /// This concept is part of the Digraph concept.
 		    template <typename _Base = BaseDigraphComponent>
 		    class IterableDigraphComponent : public _Base {
 		    public:
 		      typedef _Base Base;
 		      typedef typename Base::Node Node;
 		      typedef typename Base::Arc Arc;
 		      typedef IterableDigraphComponent Digraph;
 		      /// \name Base iteration
 		      ///
 		      /// This interface provides functions for iteration on digraph items
 		      ///
 		      /// @{
 		      /// \brief Gives back the first node in the iterating order.
 		      ///
 		      /// Gives back the first node in the iterating order.
 		      ///
 		      void first(Node&) const {}
 		      /// \brief Gives back the next node in the iterating order.
 		      ///
 		      /// Gives back the next node in the iterating order.
 		      ///
 		      void next(Node&) const {}
 		      /// \brief Gives back the first arc in the iterating order.
 		      ///
 		      /// Gives back the first arc in the iterating order.
 		      ///
 		      void first(Arc&) const {}
 		      /// \brief Gives back the next arc in the iterating order.
 		      ///
 		      /// Gives back the next arc in the iterating order.
 		      ///
 		      void next(Arc&) const {}
 		      /// \brief Gives back the first of the arcs point to the given
 		      /// node.
 		      ///
 		      /// Gives back the first of the arcs point to the given node.
 		      ///
 		      void firstIn(Arc&, const Node&) const {}
 		      /// \brief Gives back the next of the arcs points to the given
 		      /// node.
 		      ///
 		      /// Gives back the next of the arcs points to the given node.
 		      ///
 		      void nextIn(Arc&) const {}
 		      /// \brief Gives back the first of the arcs start from the
 		      /// given node.
 		      ///
 		      /// Gives back the first of the arcs start from the given node.
 		      ///
 		      void firstOut(Arc&, const Node&) const {}
 		      /// \brief Gives back the next of the arcs start from the given
 		      /// node.
 		      ///
 		      /// Gives back the next of the arcs start from the given node.
 		      ///
 		      void nextOut(Arc&) const {}
 		      /// @}
 		      /// \name Class based iteration
 		      ///
 		      /// This interface provides functions for iteration on digraph items
 		      ///
 		      /// @{
 		      /// \brief This iterator goes through each node.
 		      ///
 		      /// This iterator goes through each node.
 		      ///
 		      typedef GraphItemIt<Digraph, Node> NodeIt;
 		      /// \brief This iterator goes through each node.
 		      ///
 		      /// This iterator goes through each node.
 		      ///
 		      typedef GraphItemIt<Digraph, Arc> ArcIt;
 		      /// \brief This iterator goes trough the incoming arcs of a node.
 		      ///
 		      /// This iterator goes trough the \e inccoming arcs of a certain node
 		      /// of a digraph.
 		      typedef GraphIncIt<Digraph, Arc, Node, 'i'> InArcIt;
 		      /// \brief This iterator goes trough the outgoing arcs of a node.
 		      ///
 		      /// This iterator goes trough the \e outgoing arcs of a certain node
 		      /// of a digraph.
 		      typedef GraphIncIt<Digraph, Arc, Node, 'o'> OutArcIt;
 		      /// \brief The base node of the iterator.
 		      ///
 		      /// Gives back the base node of the iterator.
 		      /// It is always the target of the pointed arc.
 		      Node baseNode(const InArcIt&) const { return INVALID; }
 		      /// \brief The running node of the iterator.
 		      ///
 		      /// Gives back the running node of the iterator.
 		      /// It is always the source of the pointed arc.
 		      Node runningNode(const InArcIt&) const { return INVALID; }
 		      /// \brief The base node of the iterator.
 		      ///
 		      /// Gives back the base node of the iterator.
 		      /// It is always the source of the pointed arc.
 		      Node baseNode(const OutArcIt&) const { return INVALID; }
 		      /// \brief The running node of the iterator.
 		      ///
 		      /// Gives back the running node of the iterator.
 		      /// It is always the target of the pointed arc.
 		      Node runningNode(const OutArcIt&) const { return INVALID; }
 		      /// @}
 		      template <typename _Digraph>
 		      struct Constraints {
 			void constraints() {
 			  checkConcept<Base, _Digraph>();
+		          {
 		            typename _Digraph::Node node(INVALID);
 		            typename _Digraph::Arc arc(INVALID);
+		            {
 		              digraph.first(node);
 		              digraph.next(node);
+		            }
+		            {
 		              digraph.first(arc);
 		              digraph.next(arc);
+		            }
+		            {
 		              digraph.firstIn(arc, node);
 		              digraph.nextIn(arc);
+		            }
+		            {
 		              digraph.firstOut(arc, node);
 		              digraph.nextOut(arc);
+		            }
+		          }
+		          {
 		            checkConcept<GraphItemIt<_Digraph, typename _Digraph::Arc>,
 		              typename _Digraph::ArcIt >();
 		            checkConcept<GraphItemIt<_Digraph, typename _Digraph::Node>,
 		              typename _Digraph::NodeIt >();
 		            checkConcept<GraphIncIt<_Digraph, typename _Digraph::Arc,
 		              typename _Digraph::Node, 'i'>, typename _Digraph::InArcIt>();
 		            checkConcept<GraphIncIt<_Digraph, typename _Digraph::Arc,
 		              typename _Digraph::Node, 'o'>, typename _Digraph::OutArcIt>();
 		            typename _Digraph::Node n;
 		            typename _Digraph::InArcIt ieit(INVALID);
 		            typename _Digraph::OutArcIt oeit(INVALID);
 		            n = digraph.baseNode(ieit);
 		            n = digraph.runningNode(ieit);
 		            n = digraph.baseNode(oeit);
 		            n = digraph.runningNode(oeit);
 		            ignore_unused_variable_warning(n);
+		          }
+		        }
 			const _Digraph& digraph;
 		      };
 		    };
 		    /// \brief An empty iterable undirected graph class.
 		    ///
 		    /// This class provides beside the core graph features iterator
 		    /// based iterable interface for the undirected graph structure.
 		    /// This concept is part of the Graph concept.
 		    template <typename _Base = BaseGraphComponent>
 		    class IterableGraphComponent : public IterableDigraphComponent<_Base> {
 		    public:
 		      typedef _Base Base;
 		      typedef typename Base::Node Node;
 		      typedef typename Base::Arc Arc;
 		      typedef typename Base::Edge Edge;
 		      typedef IterableGraphComponent Graph;
 		      /// \name Base iteration
 		      ///
 		      /// This interface provides functions for iteration on graph items
 		      /// @{
 		      using IterableDigraphComponent<_Base>::first;
 		      using IterableDigraphComponent<_Base>::next;
 		      /// \brief Gives back the first edge in the iterating
 		      /// order.
 		      ///
 		      /// Gives back the first edge in the iterating order.
 		      ///
 		      void first(Edge&) const {}
 		      /// \brief Gives back the next edge in the iterating
 		      /// order.
 		      ///
 		      /// Gives back the next edge in the iterating order.
 		      ///
 		      void next(Edge&) const {}
 		      /// \brief Gives back the first of the edges from the
 		      /// given node.
 		      ///
 		      /// Gives back the first of the edges from the given
 		      /// node. The bool parameter gives back that direction which
 		      /// gives a good direction of the edge so the source of the
 		      /// directed arc is the given node.
 		      void firstInc(Edge&, bool&, const Node&) const {}
 		      /// \brief Gives back the next of the edges from the
 		      /// given node.
 		      ///
 		      /// Gives back the next of the edges from the given
 		      /// node. The bool parameter should be used as the \c firstInc()
 		      /// use it.
 		      void nextInc(Edge&, bool&) const {}
 		      using IterableDigraphComponent<_Base>::baseNode;
 		      using IterableDigraphComponent<_Base>::runningNode;
 		      /// @}
 		      /// \name Class based iteration
 		      ///
 		      /// This interface provides functions for iteration on graph items
 		      ///
 		      /// @{
 		      /// \brief This iterator goes through each node.
 		      ///
 		      /// This iterator goes through each node.
 		      typedef GraphItemIt<Graph, Edge> EdgeIt;
 		      /// \brief This iterator goes trough the incident arcs of a
 		      /// node.
 		      ///
 		      /// This iterator goes trough the incident arcs of a certain
 		      /// node of a graph.
-		      typedef GraphIncIt<Graph, Edge, Node, 'u'> IncArcIt;
+		      typedef GraphIncIt<Graph, Edge, Node, 'u'> IncEdgeIt;
 		      /// \brief The base node of the iterator.
 		      ///
 		      /// Gives back the base node of the iterator.
-		      Node baseNode(const IncArcIt&) const { return INVALID; }
+		      Node baseNode(const IncEdgeIt&) const { return INVALID; }
 		      /// \brief The running node of the iterator.
 		      ///
 		      /// Gives back the running node of the iterator.
-		      Node runningNode(const IncArcIt&) const { return INVALID; }
+		      Node runningNode(const IncEdgeIt&) const { return INVALID; }
 		      /// @}
 		      template <typename _Graph>
 		      struct Constraints {
 			void constraints() {
 			  checkConcept<IterableDigraphComponent<Base>, _Graph>();
+		          {
 		            typename _Graph::Node node(INVALID);
 		            typename _Graph::Edge edge(INVALID);
 		            bool dir;
+		            {
 		              graph.first(edge);
 		              graph.next(edge);
+		            }
+		            {
 		              graph.firstInc(edge, dir, node);
 		              graph.nextInc(edge, dir);
+		            }
+		          }
+		          {
 		            checkConcept<GraphItemIt<_Graph, typename _Graph::Edge>,
 		              typename _Graph::EdgeIt >();
 		            checkConcept<GraphIncIt<_Graph, typename _Graph::Edge,
-		              typename _Graph::Node, 'u'>, typename _Graph::IncArcIt>();
+		              typename _Graph::Node, 'u'>, typename _Graph::IncEdgeIt>();
 		            typename _Graph::Node n;
-		            typename _Graph::IncArcIt ueit(INVALID);
+		            typename _Graph::IncEdgeIt ueit(INVALID);
 		            n = graph.baseNode(ueit);
 		            n = graph.runningNode(ueit);
+		          }
+		        }
 			const _Graph& graph;
 		      };
 		    };
 		    /// \brief An empty alteration notifier digraph class.
 		    ///
 		    /// This class provides beside the core digraph features alteration
 		    /// notifier interface for the digraph structure.  This implements
 		    /// an observer-notifier pattern for each digraph item. More
 		    /// obsevers can be registered into the notifier and whenever an
 		    /// alteration occured in the digraph all the observers will
 		    /// notified about it.
 		    template <typename _Base = BaseDigraphComponent>
 		    class AlterableDigraphComponent : public _Base {
 		    public:
 		      typedef _Base Base;
 		      typedef typename Base::Node Node;
 		      typedef typename Base::Arc Arc;
 		      /// The node observer registry.
 		      typedef AlterationNotifier<AlterableDigraphComponent, Node>
 		      NodeNotifier;
 		      /// The arc observer registry.
 		      typedef AlterationNotifier<AlterableDigraphComponent, Arc>
 		      ArcNotifier;
 		      /// \brief Gives back the node alteration notifier.
 		      ///
 		      /// Gives back the node alteration notifier.
 		      NodeNotifier& notifier(Node) const {
 			return NodeNotifier();
+		      }
 		      /// \brief Gives back the arc alteration notifier.
 		      ///
 		      /// Gives back the arc alteration notifier.
 		      ArcNotifier& notifier(Arc) const {
 			return ArcNotifier();
+		      }
 		      template <typename _Digraph>
 		      struct Constraints {
 			void constraints() {
 			  checkConcept<Base, _Digraph>();
 		          typename _Digraph::NodeNotifier& nn
 		            = digraph.notifier(typename _Digraph::Node());
 		          typename _Digraph::ArcNotifier& en
 		            = digraph.notifier(typename _Digraph::Arc());
 		          ignore_unused_variable_warning(nn);
 		          ignore_unused_variable_warning(en);
+			}
 			const _Digraph& digraph;
 		      };
 		    };
 		    /// \brief An empty alteration notifier undirected graph class.
 		    ///
 		    /// This class provides beside the core graph features alteration
 		    /// notifier interface for the graph structure.  This implements
 		    /// an observer-notifier pattern for each graph item. More
 		    /// obsevers can be registered into the notifier and whenever an
 		    /// alteration occured in the graph all the observers will
 		    /// notified about it.
 		    template <typename _Base = BaseGraphComponent>
 		    class AlterableGraphComponent : public AlterableDigraphComponent<_Base> {
 		    public:
 		      typedef _Base Base;
 		      typedef typename Base::Edge Edge;
 		      /// The arc observer registry.
 		      typedef AlterationNotifier<AlterableGraphComponent, Edge>
 		      EdgeNotifier;
 		      /// \brief Gives back the arc alteration notifier.
 		      ///
 		      /// Gives back the arc alteration notifier.
 		      EdgeNotifier& notifier(Edge) const {
 			return EdgeNotifier();
+		      }
 		      template <typename _Graph>
 		      struct Constraints {
 			void constraints() {
 			  checkConcept<AlterableGraphComponent<Base>, _Graph>();
 		          typename _Graph::EdgeNotifier& uen
 		            = graph.notifier(typename _Graph::Edge());
 		          ignore_unused_variable_warning(uen);
+			}
 			const _Graph& graph;
 		      };
 		    };
 		    /// \brief Class describing the concept of graph maps
 		    ///
 		    /// This class describes the common interface of the graph maps
 		    /// (NodeMap, ArcMap), that is \ref maps-page "maps" which can be used to
 		    /// associate data to graph descriptors (nodes or arcs).
 		    template <typename _Graph, typename _Item, typename _Value>
 		    class GraphMap : public ReadWriteMap<_Item, _Value> {
 		    public:
 		      typedef ReadWriteMap<_Item, _Value> Parent;
 		      /// The graph type of the map.
 		      typedef _Graph Graph;
 		      /// The key type of the map.
 		      typedef _Item Key;
 		      /// The value type of the map.
 		      typedef _Value Value;
 		      /// \brief Construct a new map.
 		      ///
 		      /// Construct a new map for the graph.
 		      explicit GraphMap(const Graph&) {}
 		      /// \brief Construct a new map with default value.
 		      ///
 		      /// Construct a new map for the graph and initalise the values.
 		      GraphMap(const Graph&, const Value&) {}
 		      /// \brief Copy constructor.
 		      ///
 		      /// Copy Constructor.
 		      GraphMap(const GraphMap&) : Parent() {}
 		      /// \brief Assign operator.
 		      ///
 		      /// Assign operator. It does not mofify the underlying graph,
 		      /// it just iterates on the current item set and set the  map
 		      /// with the value returned by the assigned map.
 		      template <typename CMap>
 		      GraphMap& operator=(const CMap&) {
 		        checkConcept<ReadMap<Key, Value>, CMap>();
 		        return *this;
+		      }
 		      template<typename _Map>
 		      struct Constraints {
 			void constraints() {
 			  checkConcept<ReadWriteMap<Key, Value>, _Map >();
 			  // Construction with a graph parameter
 			  _Map a(g);
 			  // Constructor with a graph and a default value parameter
 			  _Map a2(g,t);
 			  // Copy constructor.
 			  _Map b(c);
 		          ReadMap<Key, Value> cmap;
 		          b = cmap;
 			  ignore_unused_variable_warning(a2);
 			  ignore_unused_variable_warning(b);
+			}
 			const _Map &c;
 			const Graph &g;
 			const typename GraphMap::Value &t;
 		      };
 		    };
 		    /// \brief An empty mappable digraph class.
 		    ///
 		    /// This class provides beside the core digraph features
 		    /// map interface for the digraph structure.
 		    /// This concept is part of the Digraph concept.
 		    template <typename _Base = BaseDigraphComponent>
 		    class MappableDigraphComponent : public _Base  {
 		    public:
 		      typedef _Base Base;
 		      typedef typename Base::Node Node;
 		      typedef typename Base::Arc Arc;
 		      typedef MappableDigraphComponent Digraph;
 		      /// \brief ReadWrite map of the nodes.
 		      ///
 		      /// ReadWrite map of the nodes.
 		      ///
 		      template <typename _Value>
 		      class NodeMap : public GraphMap<Digraph, Node, _Value> {
 		      public:
 		        typedef GraphMap<MappableDigraphComponent, Node, _Value> Parent;
 			/// \brief Construct a new map.
 			///
 			/// Construct a new map for the digraph.
 			explicit NodeMap(const MappableDigraphComponent& digraph)
 		          : Parent(digraph) {}
 			/// \brief Construct a new map with default value.
 			///
 			/// Construct a new map for the digraph and initalise the values.
 			NodeMap(const MappableDigraphComponent& digraph, const _Value& value)
 		          : Parent(digraph, value) {}
 			/// \brief Copy constructor.
 			///
 			/// Copy Constructor.
 			NodeMap(const NodeMap& nm) : Parent(nm) {}
 			/// \brief Assign operator.
 			///
 			/// Assign operator.
 		        template <typename CMap>
 		        NodeMap& operator=(const CMap&) {
 		          checkConcept<ReadMap<Node, _Value>, CMap>();
 		          return *this;
+		        }
 		      };
 		      /// \brief ReadWrite map of the arcs.
 		      ///
 		      /// ReadWrite map of the arcs.
 		      ///
 		      template <typename _Value>
 		      class ArcMap : public GraphMap<Digraph, Arc, _Value> {
 		      public:
 		        typedef GraphMap<MappableDigraphComponent, Arc, _Value> Parent;
 			/// \brief Construct a new map.
 			///
 			/// Construct a new map for the digraph.
 			explicit ArcMap(const MappableDigraphComponent& digraph)
 		          : Parent(digraph) {}
 			/// \brief Construct a new map with default value.
 			///
 			/// Construct a new map for the digraph and initalise the values.
 			ArcMap(const MappableDigraphComponent& digraph, const _Value& value)
 		          : Parent(digraph, value) {}
 			/// \brief Copy constructor.
 			///
 			/// Copy Constructor.
 			ArcMap(const ArcMap& nm) : Parent(nm) {}
 			/// \brief Assign operator.
 			///
 			/// Assign operator.
 		        template <typename CMap>
 		        ArcMap& operator=(const CMap&) {
 		          checkConcept<ReadMap<Arc, _Value>, CMap>();
 		          return *this;
+		        }
 		      };
 		      template <typename _Digraph>
 		      struct Constraints {
 			struct Dummy {
 			  int value;
 			  Dummy() : value(0) {}
 			  Dummy(int _v) : value(_v) {}
 			};
 			void constraints() {
 			  checkConcept<Base, _Digraph>();
 			  { // int map test
 			    typedef typename _Digraph::template NodeMap<int> IntNodeMap;
 			    checkConcept<GraphMap<_Digraph, typename _Digraph::Node, int>,
 			      IntNodeMap >();
 			  } { // bool map test
 			    typedef typename _Digraph::template NodeMap<bool> BoolNodeMap;
 			    checkConcept<GraphMap<_Digraph, typename _Digraph::Node, bool>,
 			      BoolNodeMap >();
 			  } { // Dummy map test
 			    typedef typename _Digraph::template NodeMap<Dummy> DummyNodeMap;
 			    checkConcept<GraphMap<_Digraph, typename _Digraph::Node, Dummy>,
 			      DummyNodeMap >();
+			  }
 			  { // int map test
 			    typedef typename _Digraph::template ArcMap<int> IntArcMap;
 			    checkConcept<GraphMap<_Digraph, typename _Digraph::Arc, int>,
 			      IntArcMap >();
 			  } { // bool map test
 			    typedef typename _Digraph::template ArcMap<bool> BoolArcMap;
 			    checkConcept<GraphMap<_Digraph, typename _Digraph::Arc, bool>,
 			      BoolArcMap >();
 			  } { // Dummy map test
 			    typedef typename _Digraph::template ArcMap<Dummy> DummyArcMap;
 			    checkConcept<GraphMap<_Digraph, typename _Digraph::Arc, Dummy>,
 			      DummyArcMap >();
+			  }
+			}
 			_Digraph& digraph;
 		      };
 		    };
 		    /// \brief An empty mappable base bipartite graph class.
 		    ///
 		    /// This class provides beside the core graph features
 		    /// map interface for the graph structure.
 		    /// This concept is part of the Graph concept.
 		    template <typename _Base = BaseGraphComponent>
 		    class MappableGraphComponent : public MappableDigraphComponent<_Base>  {
 		    public:
 		      typedef _Base Base;
 		      typedef typename Base::Edge Edge;
 		      typedef MappableGraphComponent Graph;
 		      /// \brief ReadWrite map of the edges.
 		      ///
 		      /// ReadWrite map of the edges.
 		      ///
 		      template <typename _Value>
 		      class EdgeMap : public GraphMap<Graph, Edge, _Value> {
 		      public:
 		        typedef GraphMap<MappableGraphComponent, Edge, _Value> Parent;
 			/// \brief Construct a new map.
 			///
 			/// Construct a new map for the graph.
 			explicit EdgeMap(const MappableGraphComponent& graph)
 		          : Parent(graph) {}
 			/// \brief Construct a new map with default value.
 			///
 			/// Construct a new map for the graph and initalise the values.
 			EdgeMap(const MappableGraphComponent& graph, const _Value& value)
 		          : Parent(graph, value) {}
 			/// \brief Copy constructor.
 			///
 			/// Copy Constructor.
 			EdgeMap(const EdgeMap& nm) : Parent(nm) {}
 			/// \brief Assign operator.
 			///
 			/// Assign operator.
 		        template <typename CMap>
 		        EdgeMap& operator=(const CMap&) {
 		          checkConcept<ReadMap<Edge, _Value>, CMap>();
 		          return *this;
+		        }
 		      };
 		      template <typename _Graph>
 		      struct Constraints {
 			struct Dummy {
 			  int value;
 			  Dummy() : value(0) {}
 			  Dummy(int _v) : value(_v) {}
 			};
 			void constraints() {
 			  checkConcept<MappableGraphComponent<Base>, _Graph>();
 			  { // int map test
 			    typedef typename _Graph::template EdgeMap<int> IntEdgeMap;
 			    checkConcept<GraphMap<_Graph, typename _Graph::Edge, int>,
 			      IntEdgeMap >();
 			  } { // bool map test
 			    typedef typename _Graph::template EdgeMap<bool> BoolEdgeMap;
 			    checkConcept<GraphMap<_Graph, typename _Graph::Edge, bool>,
 			      BoolEdgeMap >();
 			  } { // Dummy map test
 			    typedef typename _Graph::template EdgeMap<Dummy> DummyEdgeMap;
 			    checkConcept<GraphMap<_Graph, typename _Graph::Edge, Dummy>,
 			      DummyEdgeMap >();
+			  }
+			}
 			_Graph& graph;
 		      };
 		    };
 		    /// \brief An empty extendable digraph class.
 		    ///
 		    /// This class provides beside the core digraph features digraph
 		    /// extendable interface for the digraph structure.  The main
 		    /// difference between the base and this interface is that the
 		    /// digraph alterations should handled already on this level.
 		    template <typename _Base = BaseDigraphComponent>
 		    class ExtendableDigraphComponent : public _Base {
 		    public:
 		      typedef _Base Base;
 		      typedef typename _Base::Node Node;
 		      typedef typename _Base::Arc Arc;
 		      /// \brief Adds a new node to the digraph.
 		      ///
 		      /// Adds a new node to the digraph.
 		      ///
 		      Node addNode() {
 			return INVALID;
+		      }
 		      /// \brief Adds a new arc connects the given two nodes.
 		      ///
 		      /// Adds a new arc connects the the given two nodes.
 		      Arc addArc(const Node&, const Node&) {
 			return INVALID;
+		      }
 		      template <typename _Digraph>
 		      struct Constraints {
 			void constraints() {
 		          checkConcept<Base, _Digraph>();
 			  typename _Digraph::Node node_a, node_b;
 			  node_a = digraph.addNode();
 			  node_b = digraph.addNode();
 			  typename _Digraph::Arc arc;
 			  arc = digraph.addArc(node_a, node_b);
+			}
 			_Digraph& digraph;
 		      };
 		    };
 		    /// \brief An empty extendable base undirected graph class.
 		    ///
 		    /// This class provides beside the core undirected graph features
 		    /// core undircted graph extend interface for the graph structure.
 		    /// The main difference between the base and this interface is
 		    /// that the graph alterations should handled already on this
 		    /// level.
 		    template <typename _Base = BaseGraphComponent>
 		    class ExtendableGraphComponent : public _Base {
 		    public:
 		      typedef _Base Base;
 		      typedef typename _Base::Node Node;
 		      typedef typename _Base::Edge Edge;
 		      /// \brief Adds a new node to the graph.
 		      ///
 		      /// Adds a new node to the graph.
 		      ///
 		      Node addNode() {
 			return INVALID;
+		      }
 		      /// \brief Adds a new arc connects the given two nodes.
 		      ///
 		      /// Adds a new arc connects the the given two nodes.
 		      Edge addArc(const Node&, const Node&) {
 			return INVALID;
+		      }
 		      template <typename _Graph>
 		      struct Constraints {
 			void constraints() {
 			  checkConcept<Base, _Graph>();
 			  typename _Graph::Node node_a, node_b;
 			  node_a = graph.addNode();
 			  node_b = graph.addNode();
 			  typename _Graph::Edge edge;
 			  edge = graph.addEdge(node_a, node_b);
+			}
 			_Graph& graph;
 		      };
 		    };
 		    /// \brief An empty erasable digraph class.
 		    ///
 		    /// This class provides beside the core digraph features core erase
 		    /// functions for the digraph structure. The main difference between
 		    /// the base and this interface is that the digraph alterations
 		    /// should handled already on this level.
 		    template <typename _Base = BaseDigraphComponent>
 		    class ErasableDigraphComponent : public _Base {
 		    public:
 		      typedef _Base Base;
 		      typedef typename Base::Node Node;
 		      typedef typename Base::Arc Arc;
 		      /// \brief Erase a node from the digraph.
 		      ///
 		      /// Erase a node from the digraph. This function should
 		      /// erase all arcs connecting to the node.
 		      void erase(const Node&) {}
 		      /// \brief Erase an arc from the digraph.
 		      ///
 		      /// Erase an arc from the digraph.
 		      ///
 		      void erase(const Arc&) {}
 		      template <typename _Digraph>
 		      struct Constraints {
 			void constraints() {
 		          checkConcept<Base, _Digraph>();
 			  typename _Digraph::Node node;
 			  digraph.erase(node);
 			  typename _Digraph::Arc arc;
 			  digraph.erase(arc);
+			}
 			_Digraph& digraph;
 		      };
 		    };
 		    /// \brief An empty erasable base undirected graph class.
 		    ///
 		    /// This class provides beside the core undirected graph features
 		    /// core erase functions for the undirceted graph structure. The
 		    /// main difference between the base and this interface is that
 		    /// the graph alterations should handled already on this level.
 		    template <typename _Base = BaseGraphComponent>
 		    class ErasableGraphComponent : public _Base {
 		    public:
 		      typedef _Base Base;
 		      typedef typename Base::Node Node;
 		      typedef typename Base::Edge Edge;
 		      /// \brief Erase a node from the graph.
 		      ///
 		      /// Erase a node from the graph. This function should erase
 		      /// arcs connecting to the node.
 		      void erase(const Node&) {}
 		      /// \brief Erase an arc from the graph.
 		      ///
 		      /// Erase an arc from the graph.
 		      ///
 		      void erase(const Edge&) {}
 		      template <typename _Graph>
 		      struct Constraints {
 			void constraints() {
 		          checkConcept<Base, _Graph>();
 			  typename _Graph::Node node;
 			  graph.erase(node);
 			  typename _Graph::Arc arc;
 			  graph.erase(arc);
+			}
 			_Graph& graph;
 		      };
 		    };
 		    /// \brief An empty clearable base digraph class.
 		    ///
 		    /// This class provides beside the core digraph features core clear
 		    /// functions for the digraph structure. The main difference between
 		    /// the base and this interface is that the digraph alterations
 		    /// should handled already on this level.
 		    template <typename _Base = BaseDigraphComponent>
 		    class ClearableDigraphComponent : public _Base {
 		    public:
 		      typedef _Base Base;
 		      /// \brief Erase all nodes and arcs from the digraph.
 		      ///
 		      /// Erase all nodes and arcs from the digraph.
 		      ///
 		      void clear() {}
 		      template <typename _Digraph>
 		      struct Constraints {
 			void constraints() {
 		          checkConcept<Base, _Digraph>();
 			  digraph.clear();
+			}
 			_Digraph digraph;
 		      };
 		    };
 		    /// \brief An empty clearable base undirected graph class.
 		    ///
 		    /// This class provides beside the core undirected graph features
 		    /// core clear functions for the undirected graph structure. The
 		    /// main difference between the base and this interface is that
 		    /// the graph alterations should handled already on this level.
 		    template <typename _Base = BaseGraphComponent>
 		    class ClearableGraphComponent : public ClearableDigraphComponent<_Base> {
 		    public:
 		      typedef _Base Base;
 		      template <typename _Graph>
 		      struct Constraints {
 			void constraints() {
 		          checkConcept<ClearableGraphComponent<Base>, _Graph>();
+			}
 			_Graph graph;
 		      };
 		    };
+		  }
+		}
 		#endif

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