klao@959: /* -*- C++ -*-
klao@959:  * src/lemon/concept/graph_component.h - Part of LEMON, a generic C++ optimization library
klao@959:  *
klao@959:  * Copyright (C) 2004 Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport
klao@959:  * (Egervary Combinatorial Optimization Research Group, EGRES).
klao@959:  *
klao@959:  * Permission to use, modify and distribute this software is granted
klao@959:  * provided that this copyright notice appears in all copies. For
klao@959:  * precise terms see the accompanying LICENSE file.
klao@959:  *
klao@959:  * This software is provided "AS IS" with no warranty of any kind,
klao@959:  * express or implied, and with no claim as to its suitability for any
klao@959:  * purpose.
klao@959:  *
klao@959:  */
klao@959: 
klao@959: ///\ingroup concept
klao@959: ///\file
klao@959: ///\brief The graph components.
klao@959: 
klao@959: 
klao@959: #ifndef LEMON_CONCEPT_GRAPH_COMPONENT_H
klao@959: #define LEMON_CONCEPT_GRAPH_COMPONENT_H
klao@959: 
klao@959: #include <lemon/invalid.h>
klao@959: #include <lemon/concept/maps.h>
klao@959: 
klao@959: namespace lemon {
klao@959:   namespace concept {
klao@959: 
klao@961: 
klao@961:     /****************   Graph iterator concepts   ****************/
klao@961: 
klao@961:     /// Skeleton class for graph Node and Edge
klao@961: 
klao@961:     /// \note Because Node and Edge are forbidden to inherit from the same
alpar@964:     /// base class, this is a template. For Node you should instantiate it
klao@961:     /// with character 'n' and for Edge with 'e'.
klao@961: 
klao@961:     template<char Ch>
klao@961:     class GraphItem {
klao@961:     public:
klao@961:       GraphItem() {}
klao@961:       GraphItem(Invalid) {}
klao@961: 
klao@961:       // We explicitely list these:
klao@961:       GraphItem(GraphItem const&) {}
klao@961:       GraphItem& operator=(GraphItem const&) { return *this; }
klao@961: 
klao@961:       bool operator==(GraphItem) const { return false; }
klao@961:       bool operator!=(GraphItem) const { return false; }
klao@961: 
klao@961:       // Technical requirement. Do we really need this?
klao@961:       bool operator<(GraphItem) const { return false; }
klao@961:     };
klao@961: 
klao@961: 
klao@961:     template<typename GI>
klao@961:     struct GraphItemConcept {
klao@961:       void constraints() {
klao@961: 	GI i1;
klao@961: 	GI i2 = i1;
klao@961: 	GI i3 = INVALID;
klao@961: 	
klao@961: 	i1 = i2 = i3;
klao@961: 
klao@961: 	bool b;
klao@961: 	b = (ia == ib) && (ia != ib) && (ia < ib);
klao@961: 	b = (ia == INVALID) && (ib != INVALID);
klao@961:       }
klao@961: 
klao@961:       const GI &ia;
klao@961:       const GI &ib;
klao@961:     };
klao@961: 
klao@961: 
klao@961:     template<typename Iter, typename Graph, typename BaseItem>
klao@961:     struct GraphIteratorConcept {
klao@961:       void constraints() {
klao@961: 	function_requires< GraphItemConcept<Iter> >();
klao@961: 	Iter it1(g);
klao@961: 
klao@961: 	/// \todo Do we need NodeIt(Node) kind of constructor?
klao@961: 	//	Iter it2(bj);
klao@961: 	Iter it2;
klao@961: 
klao@961: 	it2 = ++it1;
klao@961: 	++it2 = it1;
klao@961: 	++(++it1);
klao@961: 	/// \bug This should be: is_base_and_derived<BaseItem, Iter>
klao@961: 	BaseItem bi = it1;
klao@961: 	bi = it2;
klao@961:       }
klao@961: 
klao@961:       BaseItem bj;
klao@961:       Graph g;
klao@961:     };
klao@961: 
klao@961:     template<typename Iter, typename Graph>
klao@961:     struct GraphIncIteratorConcept {
klao@961:       typedef typename Graph::Node Node;
klao@961:       typedef typename Graph::Edge Edge;
klao@961:       void constraints() {
klao@961: 	function_requires< GraphItemConcept<Iter> >();
klao@961: 	Iter it1(graph, node);
klao@961: 	/// \todo Do we need OutEdgeIt(Edge) kind of constructor?
klao@961: 	//	Iter it2(edge);
klao@961: 	Iter it2;
klao@961: 
klao@961: 	it2 = ++it1;
klao@961: 	++it2 = it1;
klao@961: 	++(++it1);
klao@961: 	Edge e = it1;
klao@961: 	e = it2;
klao@961:       }
klao@961: 
klao@961:       Edge edge;
klao@961:       Node node;
klao@961:       Graph graph;
klao@961:     };
klao@961: 
klao@961: 
klao@961: 
klao@959:     /// An empty base graph class.
klao@959:   
klao@961:     /// This class provides the minimal set of features needed for a graph
klao@961:     /// structure. All graph concepts have to be conform to this base
klao@961:     /// graph.
klao@961:     ///
klao@961:     /// \bug This is not true. The minimal graph concept is the
klao@961:     /// BaseIterableGraphComponent.
klao@959: 
klao@959:     class BaseGraphComponent {
klao@959:     public:
klao@959: 
klao@959:       typedef BaseGraphComponent Graph;
klao@959:       
klao@959:       /// Node class of the graph.
klao@959: 
klao@959:       /// This class represents the Nodes of the graph. 
klao@959:       ///
klao@959:       class Node {
klao@959:       public:
klao@959: 
klao@959: 	/// Default constructor.
klao@959: 
klao@959: 	/// @warning The default constructor sets the iterator
klao@959: 	/// to an undefined value.
klao@959: 
klao@959: 	Node() {}
klao@959: 	/// Copy constructor.
klao@959: 
klao@959: 	/// Copy constructor.
klao@959: 	///
klao@959: 	Node(const Node&) {}
klao@959: 
klao@959: 	/// Invalid constructor \& conversion.
klao@959: 
klao@959: 	/// This constructor initializes the iterator to be invalid.
klao@959: 	/// \sa Invalid for more details.
klao@959: 	Node(Invalid) {}
klao@959: 
klao@959: 
deba@980: 	/// Assign operator for nodes.
deba@980: 
deba@980: 	/// The nodes are assignable. 
deba@980: 	///
klao@959: 	Node& operator=(const Node&) { return *this;}
klao@959: 
klao@959: 	/// Equality operator.
klao@959: 
klao@959: 	/// Two iterators are equal if and only if they represents the
klao@959: 	/// same node in the graph or both are invalid.
klao@961: 	bool operator==(const Node&) const { return true;}
klao@959: 
klao@959: 
klao@959: 	/// Inequality operator.
klao@959: 	
klao@959: 	/// \sa operator==(const Node& n)
klao@959: 	///
klao@961: 	bool operator!=(const Node&) const { return true;}
klao@959: 
klao@959:  	/// Comparison operator.
klao@959: 
klao@959: 	/// This is a strict ordering between the nodes.
klao@959: 	///
klao@959: 	/// This ordering can be different from the iterating order of nodes.
klao@959: 	/// \todo Possibly we don't need it.
klao@961: 	bool operator<(const Node&) const { return true;}
klao@959:       };
klao@959: 
klao@959:       /// Edge class of the graph.
klao@959: 
klao@959:       /// This class represents the Edges of the graph. 
klao@959:       ///
klao@959:       class Edge {
klao@959:       public:
klao@959: 
klao@959: 	/// Default constructor.
klao@959: 
klao@959: 	/// @warning The default constructor sets the iterator
klao@959: 	/// to an undefined value.
klao@959: 
klao@959: 	Edge() {}
klao@959: 	/// Copy constructor.
klao@959: 
klao@959: 	/// Copy constructor.
klao@959: 	///
klao@959: 	Edge(const Edge&) {}
klao@959: 
klao@959: 	/// Invalid constructor \& conversion.
klao@959: 
klao@959: 	/// This constructor initializes the iterator to be invalid.
klao@959: 	/// \sa Invalid for more details.
klao@959: 	Edge(Invalid) {}
klao@959: 
deba@980: 	/// Assign operator for edges.
klao@959: 
deba@980: 	/// The edges are assignable. 
deba@980: 	///
klao@959: 	Edge& operator=(const Edge&) { return *this;}
klao@959: 
klao@959: 	/// Equality operator.
klao@959: 
klao@959: 	/// Two iterators are equal if and only if they represents the
klao@959: 	/// same edge in the graph or both are invalid.
klao@961: 	bool operator==(const Edge&) const { return true;}
klao@959: 
klao@959: 
klao@959: 	/// Inequality operator.
klao@959: 	
klao@959: 	/// \sa operator==(const Edge& n)
klao@959: 	///
klao@961: 	bool operator!=(const Edge&) const { return true;}
klao@959: 
klao@959:  	/// Comparison operator.
klao@959: 
klao@959: 	/// This is a strict ordering between the edges.
klao@959: 	///
klao@959: 	/// This ordering can be different from the iterating order of edges.
klao@959: 	/// \todo Possibly we don't need it.
klao@961: 	bool operator<(const Edge&) const { return true;}
klao@959:       };
klao@959: 
klao@959:       ///Gives back the head node of an edge.
klao@959: 
klao@959:       ///Gives back the head node of an edge.
klao@959:       ///
klao@959:       Node head(const Edge&) const { return INVALID;}
klao@959: 
klao@959:       ///Gives back the tail node of an edge.
klao@959: 
klao@959:       ///Gives back the tail node of an edge.
klao@959:       ///
klao@959:       Node tail(const Edge&) const { return INVALID;}
klao@959:     };
klao@959: 
klao@961: 
klao@959:     /// Concept check structure for BaseGraph.
klao@959: 
klao@959:     /// Concept check structure for BaseGraph.
klao@959:     ///
klao@959: 
klao@959:     template <typename Graph>
klao@959:     struct BaseGraphComponentConcept {
klao@959:       typedef typename Graph::Node Node;
klao@959:       typedef typename Graph::Edge Edge;
klao@959:       
klao@959:       void constraints() {
klao@961: 	function_requires< GraphItemConcept<Node> >();
klao@961: 	function_requires< GraphItemConcept<Edge> >();
klao@959: 	{
klao@959: 	  Node n;
klao@959: 	  Edge e;
klao@962: 	  n = graph.tail(e);
klao@962: 	  n = graph.head(e);
klao@959: 	}      
klao@959:       }
klao@959:       
klao@962:       const Graph& graph;
klao@959:     };
klao@959: 
klao@959:     /// An empty iterable base graph class.
klao@959:   
klao@959:     /// This class provides beside the core graph features
klao@959:     /// core iterable interface for the graph structure.
klao@959:     /// Most of the base graphs should be conform to this concept.
klao@959: 
klao@959:     class BaseIterableGraphComponent : virtual public BaseGraphComponent {
klao@959:     public:
klao@959: 
klao@959:       typedef BaseGraphComponent::Node Node;
klao@959:       typedef BaseGraphComponent::Edge Edge;
klao@959: 
klao@959:       /// Gives back the first Node in the iterating order.
klao@959:       
klao@959:       /// Gives back the first Node in the iterating order.
klao@959:       ///     
klao@959:       void first(Node&) const {}
klao@959: 
klao@959:       /// Gives back the next Node in the iterating order.
klao@959:       
klao@959:       /// Gives back the next Node in the iterating order.
klao@959:       ///     
klao@959:       void next(Node&) const {}
klao@959: 
klao@959:       /// Gives back the first Edge in the iterating order.
klao@959:       
klao@959:       /// Gives back the first Edge in the iterating order.
klao@959:       ///     
klao@959:       void first(Edge&) const {}
klao@959:       /// Gives back the next Edge in the iterating order.
klao@959:       
klao@959:       /// Gives back the next Edge in the iterating order.
klao@959:       ///     
klao@959:       void next(Edge&) const {}
klao@959: 
klao@959: 
klao@959:       /// Gives back the first of the Edges point to the given Node.
klao@959:       
klao@959:       /// Gives back the first of the Edges point to the given Node.
klao@959:       ///     
klao@959:       void firstIn(Edge&, const Node&) const {}
klao@959: 
klao@959:       /// Gives back the next of the Edges points to the given Node.
klao@959: 
klao@959: 
klao@959:       /// Gives back the next of the Edges points to the given Node.
klao@959:       ///
klao@959:       void nextIn(Edge&) const {}
klao@959: 
klao@959:       /// Gives back the first of the Edges start from the given Node.
klao@959:       
klao@959:       /// Gives back the first of the Edges start from the given Node.
klao@959:       ///     
klao@959:       void firstOut(Edge&, const Node&) const {}
klao@959: 
klao@959:       /// Gives back the next of the Edges start from the given Node.
klao@959:       
klao@959:       /// Gives back the next of the Edges start from the given Node.
klao@959:       ///     
klao@959:       void nextOut(Edge&) const {}
klao@959:     };
klao@959: 
klao@959: 
klao@959:     /// Concept check structure for IterableBaseGraph.
klao@959: 
klao@959:     /// Concept check structure for IterableBaseGraph.
klao@959:     ///
klao@959:     template <typename Graph>
klao@959:     struct BaseIterableGraphComponentConcept {
klao@959:       
klao@961:       void constraints() {
klao@961: 	function_requires< BaseGraphComponentConcept<Graph> >();
klao@959: 	typename Graph::Node node;      
klao@959: 	typename Graph::Edge edge;
klao@959: 	{
klao@961: 	  graph.first(node);
klao@961: 	  graph.next(node);
klao@959: 	}
klao@959: 	{
klao@961: 	  graph.first(edge);
klao@961: 	  graph.next(edge);
klao@959: 	}
klao@959: 	{
klao@961: 	  graph.firstIn(edge, node);
klao@961: 	  graph.nextIn(edge);
klao@959: 	}
klao@959: 	{
klao@961: 	  graph.firstOut(edge, node);
klao@961: 	  graph.nextOut(edge);
klao@959: 	}
klao@959:       }
klao@959: 
klao@961:       const Graph& graph;
klao@959:     };
klao@959: 
klao@959:     /// An empty idable base graph class.
klao@959:   
klao@959:     /// This class provides beside the core graph features
klao@959:     /// core id functions for the graph structure.
klao@959:     /// The most of the base graphs should be conform to this concept.
klao@959:     /// The id's are unique and immutable.
klao@959: 
klao@959:     class IDableGraphComponent : virtual public BaseGraphComponent {
klao@959:     public:
klao@959: 
klao@959:       typedef BaseGraphComponent::Node Node;
klao@959:       typedef BaseGraphComponent::Edge Edge;
klao@959: 
klao@959:       /// Gives back an unique integer id for the Node. 
klao@959: 
klao@959:       /// Gives back an unique integer id for the Node. 
klao@959:       ///
klao@959:       int id(const Node&) const { return -1;}
klao@959: 
klao@959:       /// Gives back an unique integer id for the Edge. 
klao@959: 
klao@959:       /// Gives back an unique integer id for the Edge. 
klao@959:       ///
klao@959:       int id(const Edge&) const { return -1;}
klao@959:     };
klao@959: 
klao@959: 
klao@959:     /// Concept check structure for IdableBaseGraph.
klao@959: 
klao@959:     /// Concept check structure for IdableBaseGraph.
klao@959:     ///
klao@959:     template <typename Graph>
klao@959:     struct IDableGraphComponentConcept {
klao@959: 
klao@959:       void constraints() {
klao@961: 	function_requires< BaseGraphComponentConcept<Graph> >();
klao@959: 	typename Graph::Node node;
klao@961: 	int nid = graph.id(node);
klao@961: 	nid = graph.id(node);
klao@959: 	typename Graph::Edge edge;
klao@961: 	int eid = graph.id(edge);
klao@961: 	eid = graph.id(edge);
klao@959:       }
klao@959: 
klao@961:       const Graph& graph;
klao@959:     };
klao@959: 
klao@959: 
klao@959:     /// An empty max-idable base graph class.
klao@959:   
klao@959:     /// This class provides beside the core graph features
klao@959:     /// core max id functions for the graph structure.
klao@959:     /// The most of the base graphs should be conform to this concept.
klao@959:     /// The id's are unique and immutable.
klao@959:     class MaxIDableGraphComponent : virtual public BaseGraphComponent {
klao@959:     public:
klao@959: 
klao@959:       /// Gives back an integer greater or equal to the maximum Node id. 
klao@959: 
klao@959:       /// Gives back an integer greater or equal to the maximum Node id. 
klao@959:       ///
deba@980:       int maxId(Node = INVALID) const { return -1;}
klao@959: 
klao@959:       /// Gives back an integer greater or equal to the maximum Edge id. 
klao@959: 
klao@959:       /// Gives back an integer greater or equal to the maximum Edge id. 
klao@959:       ///
deba@980:       int maxId(Edge = INVALID) const { return -1;}
klao@959:     };
klao@959: 
klao@959:     /// Concept check structure for MaxIdableBaseGraph.
klao@959: 
klao@959:     /// Concept check structure for MaxIdableBaseGraph.
klao@959:     ///
klao@959:     template <typename Graph>
klao@959:     struct MaxIDableGraphComponentConcept {
klao@959: 
klao@959:       void constraints() {
klao@961: 	function_requires< BaseGraphComponentConcept<Graph> >();
deba@980: 	int nid = graph.maxId(typename Graph::Node());
klao@959: 	ignore_unused_variable_warning(nid);
deba@980: 	int eid = graph.maxId(typename Graph::Edge());
klao@959: 	ignore_unused_variable_warning(eid);
klao@959:       }
klao@959: 
klao@961:       const Graph& graph;
klao@959:     };
klao@959: 
klao@959:     /// An empty extendable base graph class.
klao@959:   
klao@959:     /// This class provides beside the core graph features
klao@959:     /// core graph extend interface for the graph structure.
klao@959:     /// The most of the base graphs should be conform to this concept.
klao@959:     class BaseExtendableGraphComponent : virtual public BaseGraphComponent {
klao@959:     public:
klao@959: 
klao@959:       typedef BaseGraphComponent::Node Node;
klao@959:       typedef BaseGraphComponent::Edge Edge;
klao@959: 
klao@959:       /// Adds a new Node to the graph.
klao@959: 
klao@959:       /// Adds a new Node to the graph.
klao@959:       ///
klao@959:       Node addNode() {
klao@959: 	return INVALID;
klao@959:       }
klao@959:     
klao@959:       /// Adds a new Edge connects the two Nodes to the graph.
klao@959: 
klao@959:       /// Adds a new Edge connects the two Nodes to the graph.
klao@959:       ///
klao@959:       Edge addEdge(const Node& from, const Node& to) {
klao@959: 	return INVALID;
klao@959:       }
klao@959: 
klao@959:     };
klao@959: 
klao@959:     /// Concept check structure for ExtendableBaseGraph.
klao@959: 
klao@959:     /// Concept check structure for ExtendableBaseGraph.
klao@959:     ///
klao@959:     template <typename Graph>
klao@959:     struct BaseExtendableGraphComponentConcept {
klao@959:       void constraints() {
klao@961: 	function_requires< BaseGraphComponentConcept<Graph> >();
klao@959: 	typename Graph::Node node_a, node_b;
klao@959: 	node_a = graph.addNode();
klao@959: 	typename Graph::Edge edge;
klao@959: 	edge = graph.addEdge(node_a, node_b);
klao@959:       }
klao@959: 
klao@959:       Graph& graph;
klao@959:     };
klao@959: 
klao@959:     /// An empty erasable base graph class.
klao@959:   
klao@959:     /// This class provides beside the core graph features
klao@959:     /// core erase functions for the graph structure.
klao@959:     /// The most of the base graphs should be conform to this concept.
klao@959:     class BaseErasableGraphComponent : virtual public BaseGraphComponent {
klao@959:     public:
klao@959: 
klao@959:       typedef BaseGraphComponent::Node Node;
klao@959:       typedef BaseGraphComponent::Edge Edge;
klao@959: 
klao@959:       /// Erase a Node from the graph.
klao@959:       
klao@959:       /// Erase a Node from the graph. This function should not
klao@959:       /// erase edges connecting to the Node.
klao@959:       void erase(const Node&) {}    
klao@959: 
klao@959:       /// Erase an Edge from the graph.
klao@959: 
klao@959:       /// Erase an Edge from the graph.
klao@959:       ///
klao@959:       void erase(const Edge&) {}
klao@959: 
klao@959:     };
klao@959: 
klao@959:     /// Concept check structure for ErasableBaseGraph.
klao@959: 
klao@959:     /// Concept check structure for ErasableBaseGraph.
klao@959:     ///
klao@959:     template <typename Graph>
klao@959:     struct BaseErasableGraphComponentConcept {
klao@959:       void constraints() {
klao@961: 	function_requires< BaseGraphComponentConcept<Graph> >();
klao@959: 	typename Graph::Node node;
klao@959: 	graph.erase(node);
klao@959: 	typename Graph::Edge edge;
klao@959: 	graph.erase(edge);
klao@959:       }
klao@959: 
klao@959:       Graph& graph;
klao@959:     };
klao@959: 
klao@959:     /// An empty clearable base graph class.
klao@959:   
klao@959:     /// This class provides beside the core graph features
klao@959:     /// core clear functions for the graph structure.
klao@959:     /// The most of the base graphs should be conform to this concept.
klao@959:     class BaseClearableGraphComponent : virtual public BaseGraphComponent {
klao@959:     public:
klao@959: 
klao@959:       /// Erase all the Nodes and Edges from the graph.
klao@959: 
klao@959:       /// Erase all the Nodes and Edges from the graph.
klao@959:       ///
klao@959:       void clear() {}    
klao@959:     };
klao@959: 
klao@959:     /// Concept check function for ErasableBaseGraph.
klao@959: 
klao@959:     /// Concept check function for ErasableBaseGraph.
klao@959:     ///
klao@959:     template <typename Graph>
klao@959:     struct BaseClearableGraphComponentConcept {
klao@959:       void constraints() {
klao@961: 	function_requires< BaseGraphComponentConcept<Graph> >();
klao@959: 	graph.clear();
klao@959:       }
klao@959: 
klao@959:       Graph& graph;
klao@959:     };
klao@959: 
klao@959: 
klao@961:     class IterableGraphComponent :
klao@961:       virtual public BaseIterableGraphComponent {
klao@959: 
klao@959:     public:
klao@959:     
klao@959:       typedef IterableGraphComponent Graph;
klao@959: 
klao@959:       typedef BaseGraphComponent::Node Node;
klao@959:       typedef BaseGraphComponent::Edge Edge;
klao@959: 
klao@959:       class NodeIt : public Node {
klao@959:       public:
klao@959: 	NodeIt() {}
klao@959: 	NodeIt(Invalid) {}
klao@961: 	// explicit NodeIt(Node) {}
klao@961: 	explicit NodeIt(const Graph&) {}
klao@959: 
klao@959: 	NodeIt& operator++() { return *this; }
klao@959: 	//	Node operator*() const { return INVALID; }
klao@959: 
klao@961: 	bool operator==(const NodeIt&) const { return true;}
klao@961: 	bool operator!=(const NodeIt&) const { return true;}
klao@959:       };
klao@959: 
klao@959:       class EdgeIt : public Edge {
klao@959:       public:
klao@959: 	EdgeIt() {}
klao@959: 	EdgeIt(Invalid) {}
klao@961: 	// explicit EdgeIt(Edge) {}
klao@961: 	explicit EdgeIt(const Graph&) {}
klao@959: 
klao@959: 	EdgeIt& operator++() { return *this; }
klao@959: 	//	Edge operator*() const { return INVALID; }
klao@959: 
klao@961: 	bool operator==(const EdgeIt&) const { return true;}
klao@961: 	bool operator!=(const EdgeIt&) const { return true;}
klao@959:       };
klao@959: 
klao@959:       class InEdgeIt : public Edge {
klao@959:       public:
klao@959: 	InEdgeIt() {}
klao@959: 	InEdgeIt(Invalid) {}
klao@961: 	// explicit InEdgeIt(Edge) {}
klao@961: 	explicit InEdgeIt(const Graph&, const Node&) {}
klao@959: 
klao@959: 	InEdgeIt& operator++() { return *this; }
klao@959: 	//	Edge operator*() const { return INVALID; }
klao@959: 
klao@961: 	bool operator==(const InEdgeIt&) const { return true;}
klao@961: 	bool operator!=(const InEdgeIt&) const { return true;}
klao@959:       };
klao@959: 
klao@959:       class OutEdgeIt : public Edge {
klao@959:       public:
klao@959: 	OutEdgeIt() {}
klao@959: 	OutEdgeIt(Invalid) {}
klao@961: 	// explicit OutEdgeIt(Edge) {}
klao@961: 	explicit OutEdgeIt(const Graph&, const Node&) {}
klao@959: 
klao@959: 	OutEdgeIt& operator++() { return *this; }
klao@959: 	//	Edge operator*() const { return INVALID; }
klao@959: 
klao@961: 	bool operator==(const OutEdgeIt&) const { return true;}
klao@961: 	bool operator!=(const OutEdgeIt&) const { return true;}
klao@959:       };
klao@959: 
klao@959:     };
klao@959:     
klao@959:     template <typename Graph> 
klao@959:     struct IterableGraphComponentConcept {
klao@959:       void constraints() {
klao@961:   	function_requires< BaseIterableGraphComponentConcept<Graph> >();
klao@961: 
klao@959: 	typedef typename Graph::Node Node;
klao@959: 	typedef typename Graph::NodeIt NodeIt;
klao@959: 	typedef typename Graph::Edge Edge;
klao@959: 	typedef typename Graph::EdgeIt EdgeIt;
klao@959: 	typedef typename Graph::InEdgeIt InEdgeIt;
klao@959: 	typedef typename Graph::OutEdgeIt OutEdgeIt;
klao@959:   
klao@961: 	function_requires< GraphIteratorConcept<NodeIt, Graph, Node> >();
klao@961: 	function_requires< GraphIteratorConcept<EdgeIt, Graph, Edge> >();
klao@961: 	function_requires< GraphIncIteratorConcept<OutEdgeIt, Graph> >();
klao@961: 	function_requires< GraphIncIteratorConcept<InEdgeIt, Graph> >();
klao@959:       }
klao@959:     };
klao@959: 
klao@959: 
klao@959:     class MappableGraphComponent : virtual public BaseGraphComponent {
klao@959:     public:
klao@959: 
klao@959:       typedef MappableGraphComponent Graph;
klao@959: 
klao@959:       typedef BaseGraphComponent::Node Node;
klao@959:       typedef BaseGraphComponent::Edge Edge;
klao@959: 
klao@959:       template <typename Value>
klao@959:       class NodeMap : public ReferenceMap<Node, Value> {
klao@959:       public:
klao@959: 	NodeMap(const Graph&) {}
klao@959: 	NodeMap(const Graph&, const Value&) {}
klao@959: 	NodeMap(const NodeMap&) {}
klao@959: 
klao@959: 	NodeMap& operator=(const NodeMap&) { return *this;}
klao@959: 	
klao@959:       };
klao@959: 
klao@959:       template <typename Value>
klao@959:       class EdgeMap : public ReferenceMap<Edge, Value> {
klao@959:       public:
klao@959: 	EdgeMap(const Graph&) {}
klao@959: 	EdgeMap(const Graph&, const Value&) {}
klao@959: 	EdgeMap(const EdgeMap&) {}
klao@959: 
klao@959: 	EdgeMap& operator=(const EdgeMap&) { return *this;}
klao@959: 	
klao@959:       };
klao@959: 
klao@959:     };
klao@959: 
klao@959:     template <typename Graph>
klao@959:     struct MappableGraphComponentConcept {
klao@959: 
klao@959:       struct Type {
klao@959: 	int value;
klao@959: 	Type() : value(0) {}
klao@959: 	Type(int _v) : value(_v) {}
klao@959:       };
klao@959: 
klao@959:       void constraints() {
klao@961: 	function_requires< BaseGraphComponentConcept<Graph> >();
klao@959: 	{ // int map test
klao@959: 	  typedef typename Graph::template NodeMap<int> IntNodeMap;
klao@959: 	  function_requires<GraphMapConcept<IntNodeMap,Graph> >();
klao@959: 	} { // bool map test
klao@959: 	  typedef typename Graph::template NodeMap<bool> BoolNodeMap;
klao@959: 	  function_requires<GraphMapConcept<BoolNodeMap,Graph> >();
klao@959: 	} { // Type map test
klao@959: 	  typedef typename Graph::template NodeMap<Type> TypeNodeMap;
klao@959: 	  function_requires<GraphMapConcept<TypeNodeMap,Graph> >();
klao@959: 	} 
klao@959: 
klao@959: 	{ // int map test
klao@959: 	  typedef typename Graph::template EdgeMap<int> IntEdgeMap;
klao@959: 	  function_requires<GraphMapConcept<IntEdgeMap,Graph> >();
klao@959: 	} { // bool map test
klao@959: 	  typedef typename Graph::template EdgeMap<bool> BoolEdgeMap;
klao@959: 	  function_requires<GraphMapConcept<BoolEdgeMap,Graph> >();
klao@959: 	} { // Type map test
klao@959: 	  typedef typename Graph::template EdgeMap<Type> TypeEdgeMap;
klao@959: 	  function_requires<GraphMapConcept<TypeEdgeMap,Graph> >();
klao@959: 	} 
klao@959:       }
klao@959: 
klao@959:       Graph& graph;
klao@959:     };
klao@959: 
klao@959: 
klao@959:     class ExtendableGraphComponent : virtual public BaseGraphComponent {
klao@959:     public:
klao@959: 
klao@959:       typedef ExtendableGraphComponent Graph;
klao@959: 
klao@959:       typedef BaseGraphComponent::Node Node;
klao@959:       typedef BaseGraphComponent::Edge Edge;
klao@959: 
klao@959:       Node addNode() {
klao@959: 	return INVALID;
klao@959:       }
klao@959:     
klao@959:       Edge addEdge(const Node& from, const Node& to) {
klao@959: 	return INVALID;
klao@959:       }
klao@959: 
klao@959:     };
klao@959: 
klao@959:     template <typename Graph>
klao@959:     struct ExtendableGraphComponentConcept {
klao@959:       void constraints() {
klao@961: 	function_requires< BaseGraphComponentConcept<Graph> >();
klao@959: 	typename Graph::Node node_a, node_b;
klao@959: 	node_a = graph.addNode();
klao@959: 	typename Graph::Edge edge;
klao@959: 	edge = graph.addEdge(node_a, node_b);      
klao@959:       }
klao@959:       Graph& graph;
klao@959:     };
klao@959: 
klao@959:     class ErasableGraphComponent : virtual public BaseGraphComponent {
klao@959:     public:
klao@959: 
klao@959:       typedef ErasableGraphComponent Graph;
klao@959: 
klao@959:       typedef BaseGraphComponent::Node Node;
klao@959:       typedef BaseGraphComponent::Edge Edge;
klao@959: 
klao@959:       void erase(const Node&) {}    
klao@959:       void erase(const Edge&) {}
klao@959: 
klao@959:     };
klao@959: 
klao@959:     template <typename Graph>
klao@959:     struct ErasableGraphComponentConcept {
klao@959:       void constraints() {
klao@961: 	function_requires< BaseGraphComponentConcept<Graph> >();
klao@959: 	typename Graph::Node node;
klao@959: 	graph.erase(node);
klao@959: 	typename Graph::Edge edge;
klao@959: 	graph.erase(edge);      
klao@959:       }
klao@959: 
klao@959:       Graph& graph;
klao@959:     };
klao@959: 
klao@959:     class ClearableGraphComponent : virtual public BaseGraphComponent {
klao@959:     public:
klao@959: 
klao@959:       typedef ClearableGraphComponent Graph;
klao@959: 
klao@959:       typedef BaseGraphComponent::Node Node;
klao@959:       typedef BaseGraphComponent::Edge Edge;
klao@959: 
klao@959:       void clear() {}    
klao@959: 
klao@959:     };
klao@959: 
klao@959:     template <typename Graph>
klao@959:     struct ClearableGraphComponentConcept {
klao@959:       void constraints() {
klao@961: 	function_requires< BaseGraphComponentConcept<Graph> >();
klao@959: 	graph.clear();
klao@959:       }
klao@959:       Graph& graph;
klao@959:     };
klao@959: 
klao@959:   }
klao@959: 
klao@959: }
klao@959: 
klao@959: #endif