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@1030: ///\ingroup graph_concepts
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@1030:     /// \addtogroup graph_concepts
klao@1030:     /// @{
klao@961: 
klao@961:     /****************   Graph iterator concepts   ****************/
klao@961: 
klao@1030:     /// Skeleton class for graph Node and Edge types
klao@961: 
klao@1030:     /// This class describes the interface of Node and Edge (and UndirEdge
klao@1030:     /// in undirected graphs) subtypes of graph types.
klao@1030:     ///
klao@1030:     /// \note This class is a template class so that we can use it to
klao@1030:     /// create graph skeleton classes. The reason for this is than Node
klao@1030:     /// and Edge types should \em not derive from the same base class.
klao@1030:     /// For Node you should instantiate it with character 'n' and for Edge
klao@1030:     /// with 'e'.
klao@961: 
klao@1030: #ifndef DOXYGEN
klao@1030:     template <char _selector = '0'>
klao@1030: #endif
klao@961:     class GraphItem {
klao@961:     public:
deba@989:       /// Default constructor.
deba@989:       
klao@1030:       /// \warning The default constructor is not required to set
klao@1030:       /// the item to some well-defined value. So you should consider it
klao@1030:       /// as uninitialized.
klao@961:       GraphItem() {}
deba@989:       /// Copy constructor.
deba@989:       
deba@989:       /// Copy constructor.
deba@989:       ///
deba@989:       GraphItem(GraphItem const&) {}
deba@989:       /// Invalid constructor \& conversion.
deba@989: 
deba@989:       /// This constructor initializes the item to be invalid.
deba@989:       /// \sa Invalid for more details.
klao@961:       GraphItem(Invalid) {}
deba@989:       /// Assign operator for nodes.
klao@961: 
deba@989:       /// The nodes are assignable. 
deba@989:       ///
klao@961:       GraphItem& operator=(GraphItem const&) { return *this; }
deba@989:       /// Equality operator.
deba@989:       
deba@989:       /// Two iterators are equal if and only if they represents the
deba@989:       /// same node in the graph or both are invalid.
klao@961:       bool operator==(GraphItem) const { return false; }
deba@989:       /// Inequality operator.
deba@989: 	
deba@989:       /// \sa operator==(const Node& n)
deba@989:       ///
klao@961:       bool operator!=(GraphItem) const { return false; }
klao@961: 
klao@1030:       /// Artificial ordering operator.
deba@989: 
klao@1030:       /// To allow the use of graph descriptors as key type in std::map or
klao@1030:       /// similar associative container we require this.
klao@1030:       ///
klao@1030:       /// \note This operator only have to define some strict ordering of
klao@1030:       /// the items; this order has nothing to do with the iteration
klao@1030:       /// ordering of the items.
klao@1030:       ///
klao@1030:       /// \bug This is a technical requirement. Do we really need this?
klao@1030:       bool operator<(GraphItem) const { return false; }
deba@989: 
deba@989:       template<typename _GraphItem>
deba@989:       struct Constraints {
deba@989: 	void constraints() {
deba@989: 	  _GraphItem i1;
deba@989: 	  _GraphItem i2 = i1;
deba@989: 	  _GraphItem i3 = INVALID;
deba@989: 	  
deba@989: 	  i1 = i2 = i3;
deba@989: 
deba@989: 	  bool b;
deba@989: 	  //	  b = (ia == ib) && (ia != ib) && (ia < ib);
deba@989: 	  b = (ia == ib) && (ia != ib);
deba@989: 	  b = (ia == INVALID) && (ib != INVALID);
klao@1030: 	  b = (ia < ib);
deba@989: 	}
deba@989: 
deba@989: 	const _GraphItem &ia;
deba@989: 	const _GraphItem &ib;
deba@989:       };
klao@961:     };
klao@961: 
klao@1030:     /// A type describing the concept of graph node
klao@1030: 
klao@1030:     /// This is an instantiation of \ref GraphItem which can be used as a
klao@1030:     /// Node subtype in graph skeleton definitions
klao@1030:     typedef GraphItem<'n'> GraphNode;
klao@1030: 
klao@1030:     /// A type describing the concept of graph edge
klao@1030: 
klao@1030:     /// This is an instantiation of \ref GraphItem which can be used as a
klao@1030:     /// Edge subtype in graph skeleton definitions
klao@1030:     typedef GraphItem<'e'> GraphEdge;
klao@1030: 
klao@1030: 
klao@1030:     /**************** Basic features of graphs ****************/
klao@1030: 
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:       ///
deba@989:       typedef GraphItem<'n'> Node;
klao@959: 
klao@959:       /// Edge class of the graph.
klao@959: 
klao@959:       /// This class represents the Edges of the graph. 
klao@959:       ///
deba@989:       typedef GraphItem<'e'> Edge;
klao@959: 
alpar@986:       ///Gives back the target node of an edge.
klao@959: 
alpar@986:       ///Gives back the target node of an edge.
klao@959:       ///
alpar@986:       Node target(const Edge&) const { return INVALID;}
klao@959: 
alpar@986:       ///Gives back the source node of an edge.
klao@959: 
alpar@986:       ///Gives back the source node of an edge.
klao@959:       ///
alpar@986:       Node source(const Edge&) const { return INVALID;}
klao@959: 
klao@961: 
deba@989:       template <typename _Graph>
deba@989:       struct Constraints {
deba@989: 	typedef typename _Graph::Node Node;
deba@989: 	typedef typename _Graph::Edge Edge;
klao@959:       
deba@989: 	void constraints() {
deba@989: 	  checkConcept<GraphItem<'n'>, Node>();
deba@989: 	  checkConcept<GraphItem<'e'>, Edge>();
deba@989: 	  {
deba@989: 	    Node n;
deba@989: 	    Edge e;
deba@989: 	    n = graph.source(e);
deba@989: 	    n = graph.target(e);
deba@989: 	  }      
deba@989: 	}
klao@959:       
deba@989: 	const _Graph& graph;
deba@989:       };
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: 
deba@989:       template <typename _Graph>
deba@989:       struct Constraints {
deba@989:       
deba@989: 	void constraints() {
deba@989: 	  checkConcept< BaseGraphComponent, _Graph >();
deba@989: 	  typename _Graph::Node node;      
deba@989: 	  typename _Graph::Edge edge;
deba@989: 	  {
deba@989: 	    graph.first(node);
deba@989: 	    graph.next(node);
deba@989: 	  }
deba@989: 	  {
deba@989: 	    graph.first(edge);
deba@989: 	    graph.next(edge);
deba@989: 	  }
deba@989: 	  {
deba@989: 	    graph.firstIn(edge, node);
deba@989: 	    graph.nextIn(edge);
deba@989: 	  }
deba@989: 	  {
deba@989: 	    graph.firstOut(edge, node);
deba@989: 	    graph.nextOut(edge);
deba@989: 	  }
deba@989: 	}
klao@959: 
deba@989: 	const _Graph& graph;
deba@989:       };
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:     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: 
deba@989:       template <typename _Graph>
deba@989:       struct Constraints {
klao@959: 
deba@989: 	void constraints() {
deba@989: 	  checkConcept< BaseGraphComponent, _Graph >();
deba@989: 	  typename _Graph::Node node;
deba@989: 	  int nid = graph.id(node);
deba@989: 	  nid = graph.id(node);
deba@989: 	  typename _Graph::Edge edge;
deba@989: 	  int eid = graph.id(edge);
deba@989: 	  eid = graph.id(edge);
deba@989: 	}
klao@959: 
deba@989: 	const _Graph& graph;
deba@989:       };
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: 
deba@989:       template <typename _Graph>
deba@989:       struct Constraints {
klao@959: 
deba@989: 	void constraints() {
deba@989: 	  checkConcept<BaseGraphComponent, _Graph>();
deba@989: 	  int nid = graph.maxId(typename _Graph::Node());
deba@989: 	  ignore_unused_variable_warning(nid);
deba@989: 	  int eid = graph.maxId(typename _Graph::Edge());
deba@989: 	  ignore_unused_variable_warning(eid);
deba@989: 	}
deba@989:       
deba@989: 	const _Graph& graph;
deba@989:       };
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: 
deba@989:       template <typename _Graph>
deba@989:       struct Constraints {
deba@989: 	void constraints() {
deba@989: 	  checkConcept<BaseGraphComponent, _Graph >();
deba@989: 	  typename _Graph::Node node_a, node_b;
deba@989: 	  node_a = graph.addNode();
deba@989: 	  typename _Graph::Edge edge;
deba@989: 	  edge = graph.addEdge(node_a, node_b);
deba@989: 	}
klao@959: 
deba@989: 	_Graph& graph;
deba@989:       };
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: 
deba@989:       template <typename _Graph>
deba@989:       struct Constraints {
deba@989: 	void constraints() {
deba@989: 	  checkConcept<BaseGraphComponent, _Graph>();
deba@989: 	  typename _Graph::Node node;
deba@989: 	  graph.erase(node);
deba@989: 	  typename _Graph::Edge edge;
deba@989: 	  graph.erase(edge);
deba@989: 	}
klao@959: 
deba@989: 	_Graph& graph;
deba@989:       };
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@1022:     class ClearableGraphComponent : 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() {}    
deba@989: 
deba@989:       template <typename _Graph>
deba@989:       struct Constraints {
deba@989: 	void constraints() {
klao@1022: 	  checkConcept<BaseGraphComponent, _Graph>();
deba@989: 	  graph.clear();
deba@989: 	}
deba@989: 
klao@1022: 	_Graph graph;
deba@989:       };
klao@959:     };
klao@959: 
klao@959: 
deba@989:     /// Skeleton class for graph NodeIt and EdgeIt
deba@989: 
deba@989:     /// Skeleton class for graph NodeIt and EdgeIt.
klao@959:     ///
deba@989:     template <typename _Graph, typename _Item>
deba@989:     class GraphIterator : public _Item {
deba@989:     public:
deba@989:       /// \todo Don't we need the Item type as typedef?
klao@959: 
deba@989:       /// Default constructor.
deba@989:       
deba@989:       /// @warning The default constructor sets the iterator
deba@989:       /// to an undefined value.
deba@989:       GraphIterator() {}
deba@989:       /// Copy constructor.
deba@989:       
deba@989:       /// Copy constructor.
deba@989:       ///
deba@989:       GraphIterator(GraphIterator const&) {}
deba@989:       /// Sets the iterator to the first item.
deba@989:       
deba@989:       /// Sets the iterator to the first item of \c the graph.
deba@989:       ///
deba@989:       explicit GraphIterator(const _Graph&) {}
deba@989:       /// Invalid constructor \& conversion.
deba@989: 
deba@989:       /// This constructor initializes the item to be invalid.
deba@989:       /// \sa Invalid for more details.
deba@989:       GraphIterator(Invalid) {}
deba@989:       /// Assign operator for items.
deba@989: 
deba@989:       /// The items are assignable. 
deba@989:       ///
deba@989:       GraphIterator& operator=(GraphIterator const&) { return *this; }      
deba@989:       /// Next item.
deba@989: 
deba@989:       /// Assign the iterator to the next item.
deba@989:       ///
deba@989:       GraphIterator& operator++() { return *this; }
deba@989:       //	Node operator*() const { return INVALID; }
deba@989:       /// Equality operator
deba@989: 
deba@989:       /// Two iterators are equal if and only if they point to the
deba@989:       /// same object or both are invalid.
deba@989:       bool operator==(const GraphIterator&) const { return true;}
deba@989:       /// Inequality operator
deba@989: 	
deba@989:       /// \sa operator==(Node n)
deba@989:       ///
deba@989:       bool operator!=(const GraphIterator&) const { return true;}
deba@989:       
deba@989:       template<typename _GraphIterator>
deba@989:       struct Constraints {
deba@989: 	void constraints() {
deba@989: 	  //	  checkConcept< Item, _GraphIterator >();
deba@989: 	  _GraphIterator it1(g);
deba@989: 	
deba@989: 	  /// \todo Do we need NodeIt(Node) kind of constructor?
deba@989: 	  //	_GraphIterator it2(bj);
deba@989: 	  _GraphIterator it2;
deba@989: 
deba@989: 	  it2 = ++it1;
deba@989: 	  ++it2 = it1;
deba@989: 	  ++(++it1);
deba@989: 	  /// \bug This should be: is_base_and_derived<BaseItem, _GraphIterator>
deba@989: 	  _Item bi = it1;
deba@989: 	  bi = it2;
deba@989: 	}
deba@989: 	_Graph& g;
deba@989:       };
klao@959:     };
klao@959: 
deba@989:     /// Skeleton class for graph InEdgeIt and OutEdgeIt
klao@959: 
deba@989:     /// \note Because InEdgeIt and OutEdgeIt may not inherit from the same
deba@989:     /// base class, the _selector is a additional template parameter. For 
deba@989:     /// InEdgeIt you should instantiate it with character 'i' and for 
deba@989:     /// OutEdgeIt with 'o'.
klao@1021:     /// \todo Is this a good name for this concept?
klao@1021:     template <typename Graph,
klao@1021: 	      typename Edge = typename Graph::Edge,
klao@1021: 	      char _selector = '0'>
klao@1021:     class GraphIncIterator : public Edge {
deba@989:     public:
deba@989:       /// Default constructor.
deba@989:       
deba@989:       /// @warning The default constructor sets the iterator
deba@989:       /// to an undefined value.
klao@1021:       GraphIncIterator() {}
deba@989:       /// Copy constructor.
deba@989:       
deba@989:       /// Copy constructor.
deba@989:       ///
klao@1021:       GraphIncIterator(GraphIncIterator const&) {}
deba@989:       /// Sets the iterator to the first edge incoming into or outgoing from the node.
deba@989:       
deba@989:       /// Sets the iterator to the first edge incoming into or outgoing from the node.
deba@989:       ///
klao@1021:       explicit GraphIncIterator(const Graph&, const typename Graph::Node&) {}
deba@989:       /// Invalid constructor \& conversion.
deba@989: 
deba@989:       /// This constructor initializes the item to be invalid.
deba@989:       /// \sa Invalid for more details.
klao@1021:       GraphIncIterator(Invalid) {}
deba@989:       /// Assign operator for nodes.
deba@989: 
deba@989:       /// The nodes are assignable. 
deba@989:       ///
klao@1021:       GraphIncIterator& operator=(GraphIncIterator const&) { return *this; }      
deba@989:       /// Next edge.
deba@989: 
deba@989:       /// Assign the iterator to the next node.
deba@989:       ///
klao@1021:       GraphIncIterator& operator++() { return *this; }
klao@1021: 
deba@989:       //	Node operator*() const { return INVALID; }
klao@1021: 
deba@989:       /// Equality operator
deba@989: 
deba@989:       /// Two iterators are equal if and only if they point to the
deba@989:       /// same object or both are invalid.
klao@1021:       bool operator==(const GraphIncIterator&) const { return true;}
klao@1021: 
deba@989:       /// Inequality operator
deba@989: 	
deba@989:       /// \sa operator==(Node n)
deba@989:       ///
klao@1021:       bool operator!=(const GraphIncIterator&) const { return true;}
deba@989: 
klao@1021:       template <typename _GraphIncIterator>
deba@989:       struct Constraints {
klao@1021: 	typedef typename Graph::Node Node;
deba@989: 	void constraints() {
klao@1021: 	  checkConcept<GraphItem<'e'>, _GraphIncIterator>();
klao@1021: 	  _GraphIncIterator it1(graph, node);
deba@989: 	  /// \todo Do we need OutEdgeIt(Edge) kind of constructor?
klao@1021: 	  //	_GraphIncIterator it2(edge);
klao@1021: 	  _GraphIncIterator it2;
deba@989: 
deba@989: 	  it2 = ++it1;
deba@989: 	  ++it2 = it1;
deba@989: 	  ++(++it1);
deba@989: 	  Edge e = it1;
deba@989: 	  e = it2;
deba@989: 	}
deba@989: 
deba@989: 	Edge& edge;
deba@989: 	Node& node;
klao@1021: 	Graph& graph;
deba@989:       };
deba@989:     };
klao@1021: 
klao@1021: 
deba@989:     /// An empty iterable base graph class.
deba@989:   
deba@989:     /// This class provides beside the core graph features
deba@989:     /// iterator based iterable interface for the graph structure.
deba@989:     /// This concept is part of the StaticGraphConcept.
deba@989:     class IterableGraphComponent : virtual public BaseGraphComponent {
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: 
deba@989:       /// This iterator goes through each node.
klao@959: 
deba@989:       /// This iterator goes through each node.
deba@989:       ///
deba@989:       typedef GraphIterator<Graph, Node> NodeIt;
deba@989:       /// This iterator goes through each node.
klao@959: 
deba@989:       /// This iterator goes through each node.
deba@989:       ///
deba@989:       typedef GraphIterator<Graph, Edge> EdgeIt;
deba@989:       /// This iterator goes trough the incoming edges of a node.
klao@959: 
deba@989:       /// This iterator goes trough the \e inccoming edges of a certain node
deba@989:       /// of a graph.
klao@1021:       typedef GraphIncIterator<Graph, Edge, 'i'> InEdgeIt;
deba@989:       /// This iterator goes trough the outgoing edges of a node.
klao@959: 
deba@989:       /// This iterator goes trough the \e outgoing edges of a certain node
deba@989:       /// of a graph.
klao@1021:       typedef GraphIncIterator<Graph, Edge, 'o'> OutEdgeIt;
deba@989:     };
deba@989:     
deba@989:     template <typename _Graph> 
deba@989:     struct Constraints {
deba@989:       void constraints() {
deba@989:   	checkConcept< BaseGraphComponent, _Graph>();
klao@959: 
deba@989: 	checkConcept<GraphIterator<_Graph, typename _Graph::Edge>, typename _Graph::EdgeIt >();
deba@989: 	checkConcept<GraphIterator<_Graph, typename _Graph::Node>, typename _Graph::NodeIt >();
klao@1021: 	checkConcept<GraphIncIterator<_Graph>, typename _Graph::InEdgeIt >();
klao@1021: 	checkConcept<GraphIncIterator<_Graph>, typename _Graph::OutEdgeIt >();
deba@989:       }
deba@989:     };
klao@959: 
klao@959: 
klao@1030:     /// Class describing the concept of graph maps
klao@1030: 
klao@1030:     /// This class describes the common interface of the graph maps
alpar@1043:     /// (NodeMap, EdgeMap), that is \ref maps-pages "maps" which can be used to
klao@1030:     /// associate data to graph descriptors (nodes or edges).
deba@989:     template <typename Graph, typename Item, typename _Value>
deba@989:     class GraphMap : public ReadWriteMap<Item, _Value> {
deba@989:     protected:      
deba@989:       GraphMap() {}
deba@989:     public:
deba@989:       explicit GraphMap(const Graph&) {}
deba@989:       GraphMap(const Graph&, const _Value&) {}
deba@989:       GraphMap(const GraphMap&) {}
deba@989:       
deba@989:       GraphMap& operator=(const GraphMap&) { return *this;}
klao@959: 
deba@989:       template<typename _Map>
deba@989:       struct Constraints {
deba@989: 	void constraints() {
deba@989: 	  checkConcept<ReadWriteMap<Item, _Value>, _Map >();
deba@989: 	  // Construction with a graph parameter
deba@989: 	  _Map a(g);
deba@989: 	  // Constructor with a graph and a default value parameter
deba@989: 	  _Map a2(g,t);
deba@989: 	  // Copy constructor. Do we need it?
deba@989: 	  _Map b=c;
deba@989: 	  // Copy operator. Do we need it?
deba@989: 	  a=b;
klao@959: 
deba@989: 	  ignore_unused_variable_warning(a2);
deba@989: 	}
klao@959: 
deba@989: 	const _Map &c;
deba@989: 	const Graph &g;
deba@989: 	const typename GraphMap::Value &t;
klao@959:       };
klao@959: 
klao@959:     };
klao@961: 
deba@989:     /// An empty mappable base graph class.
klao@959:   
deba@989:     /// This class provides beside the core graph features
deba@989:     /// map interface for the graph structure.
deba@989:     /// This concept is part of the StaticGraphConcept.
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: 
deba@989:       /// ReadWrite map of the nodes.
deba@989:     
deba@989:       /// ReadWrite map of the nodes.
deba@989:       ///
alpar@987:       template <typename _Value>
deba@989:       class NodeMap : public GraphMap<Graph, Node, _Value> {
deba@989:       private:
deba@989: 	NodeMap();
klao@959:       public:
deba@989: 	// \todo call the right parent class constructor
deba@989: 	explicit NodeMap(const Graph&) {}
alpar@987: 	NodeMap(const Graph&, const _Value&) {}
klao@959: 	NodeMap(const NodeMap&) {}
klao@959: 
klao@959: 	NodeMap& operator=(const NodeMap&) { return *this;}
deba@989: 
klao@959:       };
klao@959: 
deba@989:       /// ReadWrite map of the edges.
deba@989:     
deba@989:       /// ReadWrite map of the edges.
deba@989:       ///
alpar@987:       template <typename _Value>
deba@989:       class EdgeMap : public GraphMap<Graph, Edge, _Value> {
deba@989:       private:
deba@989: 	EdgeMap();
klao@959:       public:
deba@989: 	// \todo call the right parent class constructor
deba@989: 	explicit EdgeMap(const Graph&) {}
alpar@987: 	EdgeMap(const Graph&, const _Value&) {}
klao@959: 	EdgeMap(const EdgeMap&) {}
klao@959: 
klao@959: 	EdgeMap& operator=(const EdgeMap&) { return *this;}
deba@989: 
klao@959:       };
klao@959: 
deba@989:       template <typename _Graph>
deba@989:       struct Constraints {
klao@959: 
deba@989: 	struct Type {
deba@989: 	  int value;
deba@989: 	  Type() : value(0) {}
deba@989: 	  Type(int _v) : value(_v) {}
deba@989: 	};
klao@959: 
deba@989: 	void constraints() {
deba@989: 	  checkConcept<BaseGraphComponent, _Graph>();
deba@989: 	  { // int map test
deba@989: 	    typedef typename _Graph::template NodeMap<int> IntNodeMap;
deba@989: 	    checkConcept<GraphMap<_Graph, typename _Graph::Node, int>, IntNodeMap >();
deba@989: 	  } { // bool map test
deba@989: 	    typedef typename _Graph::template NodeMap<bool> BoolNodeMap;
deba@989: 	    checkConcept<GraphMap<_Graph, typename _Graph::Node, bool>, BoolNodeMap >();
deba@989: 	  } { // Type map test
deba@989: 	    typedef typename _Graph::template NodeMap<Type> TypeNodeMap;
deba@989: 	    checkConcept<GraphMap<_Graph, typename _Graph::Node, Type>, TypeNodeMap >();
deba@989: 	  } 
deba@989: 
deba@989: 	  { // int map test
deba@989: 	    typedef typename _Graph::template EdgeMap<int> IntEdgeMap;
deba@989: 	    checkConcept<GraphMap<_Graph, typename _Graph::Edge, int>, IntEdgeMap >();
deba@989: 	  } { // bool map test
deba@989: 	    typedef typename _Graph::template EdgeMap<bool> BoolEdgeMap;
deba@989: 	    checkConcept<GraphMap<_Graph, typename _Graph::Edge, bool>, BoolEdgeMap >();
deba@989: 	  } { // Type map test
deba@989: 	    typedef typename _Graph::template EdgeMap<Type> TypeEdgeMap;
deba@989: 	    checkConcept<GraphMap<_Graph, typename _Graph::Edge, Type>, TypeEdgeMap >();
deba@989: 	  } 
deba@989: 	}
deba@989: 
deba@989: 	_Graph& graph;
klao@959:       };
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: 
deba@989:       template <typename _Graph>
deba@989:       struct Constraints {
deba@989: 	void constraints() {
deba@989: 	  checkConcept<BaseGraphComponent, _Graph >();
deba@989: 	  typename _Graph::Node node_a, node_b;
deba@989: 	  node_a = graph.addNode();
deba@989: 	  typename _Graph::Edge edge;
deba@989: 	  edge = graph.addEdge(node_a, node_b);      
deba@989: 	}
deba@989: 	_Graph& graph;
deba@989:       };
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: 
deba@989:       template <typename _Graph>
deba@989:       struct Constraints {
deba@989: 	void constraints() {
deba@989: 	  checkConcept<BaseGraphComponent, _Graph >();
deba@989: 	  typename _Graph::Node node;
deba@989: 	  graph.erase(node);
deba@989: 	  typename _Graph::Edge edge;
deba@989: 	  graph.erase(edge);      
deba@989: 	}
klao@959: 
deba@989: 	_Graph& graph;
deba@989:       };
klao@959:     };
klao@959: 
klao@1030:     /// @}
klao@1030: 
klao@959:   }
klao@959: 
klao@959: }
klao@959: 
klao@959: #endif