diff -r c35afa9e89e7 -r ef88c0a30f85 lemon/concepts/graph_components.h --- a/lemon/concepts/graph_components.h Mon Jan 12 23:11:39 2009 +0100 +++ b/lemon/concepts/graph_components.h Thu Nov 05 15:48:01 2009 +0100 @@ -20,9 +20,8 @@ ///\file ///\brief The concept of graph components. - -#ifndef LEMON_CONCEPT_GRAPH_COMPONENTS_H -#define LEMON_CONCEPT_GRAPH_COMPONENTS_H +#ifndef LEMON_CONCEPTS_GRAPH_COMPONENTS_H +#define LEMON_CONCEPTS_GRAPH_COMPONENTS_H #include #include @@ -32,75 +31,83 @@ namespace lemon { namespace concepts { - /// \brief Skeleton class for graph Node and Arc types + /// \brief Concept class for \c Node, \c Arc and \c Edge types. /// - /// This class describes the interface of Node and Arc (and Edge - /// in undirected graphs) subtypes of graph types. + /// This class describes the concept of \c Node, \c Arc and \c Edge + /// subtypes of digraph and 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'. - + /// create graph skeleton classes. The reason for this is that \c Node + /// and \c Arc (or \c Edge) types should \e not derive from the same + /// base class. For \c Node you should instantiate it with character + /// \c 'n', for \c Arc with \c 'a' and for \c Edge with \c 'e'. #ifndef DOXYGEN - template + template #endif class GraphItem { public: /// \brief Default constructor. /// + /// 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 Constructor for conversion from \c INVALID. /// - GraphItem(const GraphItem &) {} - /// \brief Invalid constructor \& conversion. - /// - /// This constructor initializes the item to be invalid. + /// Constructor for conversion from \c INVALID. + /// It initializes the item to be invalid. /// \sa Invalid for more details. GraphItem(Invalid) {} - /// \brief Assign operator for nodes. + + /// \brief Assignment operator. /// - /// The nodes are assignable. + /// Assignment operator for the item. + GraphItem& operator=(const GraphItem&) { return *this; } + + /// \brief Assignment operator for INVALID. /// - GraphItem& operator=(GraphItem const&) { return *this; } + /// This operator makes the item invalid. + GraphItem& operator=(Invalid) { 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; } + /// Equality operator. + bool operator==(const GraphItem&) const { return false; } + /// \brief Inequality operator. /// - /// \sa operator==(const Node& n) + /// Inequality operator. + bool operator!=(const GraphItem&) const { return false; } + + /// \brief Ordering operator. /// - bool operator!=(GraphItem) const { return false; } - - /// \brief Artificial ordering operator. + /// This operator defines an ordering of the items. + /// It makes possible to use graph item types as key types in + /// associative containers (e.g. \c std::map). /// - /// 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 + /// \note This operator only has 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; } + bool operator<(const GraphItem&) const { return false; } template struct Constraints { void constraints() { _GraphItem i1; + i1=INVALID; _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); @@ -111,13 +118,12 @@ }; }; - /// \brief An empty base directed graph class. + /// \brief Base skeleton class for directed graphs. /// - /// 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. + /// This class describes the base interface of directed graph types. + /// All digraph %concepts have to conform to this class. + /// It just provides types for nodes and arcs and functions + /// to get the source and the target nodes of arcs. class BaseDigraphComponent { public: @@ -125,31 +131,27 @@ /// \brief Node class of the digraph. /// - /// This class represents the Nodes 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. + /// This class represents the arcs of the digraph. + typedef GraphItem<'a'> Arc; + + /// \brief Return the source node of an arc. /// - typedef GraphItem<'e'> Arc; + /// This function returns the source node of an arc. + Node source(const Arc&) const { return INVALID; } - /// \brief Gives back the target node of an arc. + /// \brief Return the target node of an arc. /// - /// Gives back the target node of an arc. + /// This function returns the target node of an arc. + Node target(const Arc&) const { return INVALID; } + + /// \brief Return the opposite node on the given 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. + /// This function returns the opposite node on the given arc. Node oppositeNode(const Node&, const Arc&) const { return INVALID; } @@ -175,91 +177,92 @@ }; }; - /// \brief An empty base undirected graph class. + /// \brief Base skeleton class for undirected graphs. /// - /// 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. + /// This class describes the base interface of undirected graph types. + /// All graph %concepts have to conform to this class. + /// It extends the interface of \ref BaseDigraphComponent with an + /// \c Edge type and functions to get the end nodes of edges, + /// to convert from arcs to edges and to get both direction of edges. class BaseGraphComponent : public BaseDigraphComponent { public: + + typedef BaseGraphComponent Graph; + typedef BaseDigraphComponent::Node Node; typedef BaseDigraphComponent::Arc Arc; - /// \brief Undirected arc class of the graph. + + /// \brief Undirected edge 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'> { + /// This class represents the undirected edges of the graph. + /// Undirected graphs can be used as directed graphs, each edge is + /// represented by two opposite directed arcs. + class Edge : public GraphItem<'e'> { + typedef GraphItem<'e'> Parent; + public: - typedef GraphItem<'u'> Parent; /// \brief Default constructor. /// + /// 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 Constructor for conversion from \c INVALID. /// - Edge(const Edge &) : Parent() {} - /// \brief Invalid constructor \& conversion. - /// - /// This constructor initializes the item to be invalid. + /// Constructor for conversion from \c INVALID. + /// It initializes the item to be invalid. /// \sa Invalid for more details. Edge(Invalid) {} - /// \brief Converter from arc to edge. + + /// \brief Constructor for conversion from an arc. /// + /// Constructor for conversion from an arc. /// 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. + /// \brief Return one end node of an edge. + /// + /// This function returns one end node of an edge. + Node u(const Edge&) const { return INVALID; } + + /// \brief Return the other end node of an edge. + /// + /// This function returns the other end node of an edge. + Node v(const Edge&) const { return INVALID; } + + /// \brief Return a directed arc related to an edge. + /// + /// This function returns a directed arc from its direction and the + /// represented edge. + Arc direct(const Edge&, bool) const { return INVALID; } + + /// \brief Return a directed arc related to an edge. + /// + /// This function returns a directed arc from its source node and the + /// represented edge. + Arc direct(const Edge&, const Node&) const { return INVALID; } + + /// \brief Return 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. + /// \brief Return the opposite 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;} + /// This function returns the opposite arc, i.e. the arc representing + /// the same edge and has opposite direction. + Arc oppositeArc(const Arc&) const { return INVALID; } template struct Constraints { @@ -269,7 +272,7 @@ void constraints() { checkConcept(); - checkConcept, Edge>(); + checkConcept, Edge>(); { Node n; Edge ue(INVALID); @@ -277,6 +280,7 @@ n = graph.u(ue); n = graph.v(ue); e = graph.direct(ue, true); + e = graph.direct(ue, false); e = graph.direct(ue, n); e = graph.oppositeArc(e); ue = e; @@ -290,59 +294,57 @@ }; - /// \brief An empty idable base digraph class. + /// \brief Skeleton class for \e idable directed graphs. /// - /// 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 - class IDableDigraphComponent : public _Base { + /// This class describes the interface of \e idable directed graphs. + /// It extends \ref BaseDigraphComponent with the core ID functions. + /// The ids of the items must be unique and immutable. + /// This concept is part of the Digraph concept. + template + class IDableDigraphComponent : public BAS { public: - typedef _Base Base; + typedef BAS Base; typedef typename Base::Node Node; typedef typename Base::Arc Arc; - /// \brief Gives back an unique integer id for the Node. + /// \brief Return a unique integer id for the given node. /// - /// Gives back an unique integer id for the Node. + /// This function returns a unique integer id for the given node. + int id(const Node&) const { return -1; } + + /// \brief Return the node by its unique id. /// - int id(const Node&) const { return -1;} + /// This function returns the node by its unique id. + /// If the digraph does not contain a node with the given id, + /// then the result of the function is undefined. + Node nodeFromId(int) const { return INVALID; } - /// \brief Gives back the node by the unique id. + /// \brief Return a unique integer id for the given arc. /// - /// 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;} + /// This function returns a unique integer id for the given arc. + int id(const Arc&) const { return -1; } - /// \brief Gives back an unique integer id for the Arc. + /// \brief Return the arc by its unique id. /// - /// Gives back an unique integer id for the Arc. + /// This function returns the arc by its unique id. + /// If the digraph does not contain an arc with the given id, + /// then the result of the function is undefined. + Arc arcFromId(int) const { return INVALID; } + + /// \brief Return an integer greater or equal to the maximum + /// node id. /// - int id(const Arc&) const { return -1;} + /// This function returns an integer greater or equal to the + /// maximum node id. + int maxNodeId() const { return -1; } - /// \brief Gives back the arc by the unique id. + /// \brief Return an integer greater or equal to the maximum + /// arc 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;} + /// This function returns an integer greater or equal to the + /// maximum arc id. + int maxArcId() const { return -1; } template struct Constraints { @@ -350,10 +352,12 @@ void constraints() { checkConcept(); typename _Digraph::Node node; + node=INVALID; int nid = digraph.id(node); nid = digraph.id(node); node = digraph.nodeFromId(nid); typename _Digraph::Arc arc; + arc=INVALID; int eid = digraph.id(arc); eid = digraph.id(arc); arc = digraph.arcFromId(eid); @@ -368,46 +372,45 @@ }; }; - /// \brief An empty idable base undirected graph class. + /// \brief Skeleton class for \e idable undirected graphs. /// - /// 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 - class IDableGraphComponent : public IDableDigraphComponent<_Base> { + /// This class describes the interface of \e idable undirected + /// graphs. It extends \ref IDableDigraphComponent with the core ID + /// functions of undirected graphs. + /// The ids of the items must be unique and immutable. + /// This concept is part of the Graph concept. + template + class IDableGraphComponent : public IDableDigraphComponent { public: - typedef _Base Base; + typedef BAS Base; typedef typename Base::Edge Edge; - using IDableDigraphComponent<_Base>::id; + using IDableDigraphComponent::id; - /// \brief Gives back an unique integer id for the Edge. + /// \brief Return a unique integer id for the given edge. /// - /// Gives back an unique integer id for the Edge. + /// This function returns a unique integer id for the given edge. + int id(const Edge&) const { return -1; } + + /// \brief Return the edge by its unique id. /// - int id(const Edge&) const { return -1;} + /// This function returns the edge by its unique id. + /// If the graph does not contain an edge with the given id, + /// then the result of the function is undefined. + Edge edgeFromId(int) const { return INVALID; } - /// \brief Gives back the edge by the unique id. + /// \brief Return an integer greater or equal to the maximum + /// edge 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;} + /// This function returns an integer greater or equal to the + /// maximum edge id. + int maxEdgeId() const { return -1; } template struct Constraints { void constraints() { - checkConcept(); checkConcept, _Graph >(); typename _Graph::Edge edge; int ueid = graph.id(edge); @@ -421,231 +424,243 @@ }; }; - /// \brief Skeleton class for graph NodeIt and ArcIt + /// \brief Concept class for \c NodeIt, \c ArcIt and \c EdgeIt types. /// - /// Skeleton class for graph NodeIt and ArcIt. - /// - template - class GraphItemIt : public _Item { + /// This class describes the concept of \c NodeIt, \c ArcIt and + /// \c EdgeIt subtypes of digraph and graph types. + template + class GraphItemIt : public Item { public: /// \brief Default constructor. /// - /// @warning The default constructor sets the iterator - /// to an undefined value. + /// Default constructor. + /// \warning The default constructor is not required to set + /// the iterator to some well-defined value. So you should consider it + /// as uninitialized. GraphItemIt() {} + /// \brief Copy constructor. /// /// Copy constructor. + GraphItemIt(const GraphItemIt& it) : Item(it) {} + + /// \brief Constructor that sets the iterator to the first item. /// - GraphItemIt(const GraphItemIt& ) {} - /// \brief Sets the iterator to the first item. + /// Constructor that sets the iterator to the first item. + explicit GraphItemIt(const GR&) {} + + /// \brief Constructor for conversion from \c INVALID. /// - /// 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. + /// Constructor for conversion from \c INVALID. + /// It initializes the iterator to be invalid. /// \sa Invalid for more details. GraphItemIt(Invalid) {} - /// \brief Assign operator for items. + + /// \brief Assignment operator. /// - /// The items are assignable. + /// Assignment operator for the iterator. + GraphItemIt& operator=(const GraphItemIt&) { return *this; } + + /// \brief Increment the iterator. /// - GraphItemIt& operator=(const GraphItemIt&) { return *this; } - /// \brief Next item. - /// - /// Assign the iterator to the next item. - /// + /// This operator increments the iterator, i.e. assigns it to the + /// next item. GraphItemIt& operator++() { return *this; } + /// \brief Equality operator /// + /// 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) - /// + /// Inequality 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;} template struct Constraints { void constraints() { + checkConcept, _GraphItemIt>(); _GraphItemIt it1(g); _GraphItemIt it2; + _GraphItemIt it3 = it1; + _GraphItemIt it4 = INVALID; it2 = ++it1; ++it2 = it1; ++(++it1); - _Item bi = it1; + Item bi = it1; bi = it2; } - _Graph& g; + const GR& g; }; }; - /// \brief Skeleton class for graph InArcIt and OutArcIt + /// \brief Concept class for \c InArcIt, \c OutArcIt and + /// \c IncEdgeIt types. /// - /// \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 - class GraphIncIt : public _Item { + /// This class describes the concept of \c InArcIt, \c OutArcIt + /// and \c IncEdgeIt subtypes of digraph and graph types. + /// + /// \note Since these iterator classes do not inherit from the same + /// base class, there is an additional template parameter (selector) + /// \c sel. For \c InArcIt you should instantiate it with character + /// \c 'i', for \c OutArcIt with \c 'o' and for \c IncEdgeIt with \c 'e'. + template + class GraphIncIt : public Item { public: /// \brief Default constructor. /// - /// @warning The default constructor sets the iterator - /// to an undefined value. + /// Default constructor. + /// \warning The default constructor is not required to set + /// the iterator to some well-defined value. So you should consider it + /// as uninitialized. GraphIncIt() {} + /// \brief Copy constructor. /// /// Copy constructor. + GraphIncIt(const GraphIncIt& it) : Item(it) {} + + /// \brief Constructor that sets the iterator to the first + /// incoming or outgoing arc. /// - GraphIncIt(GraphIncIt const& gi) : _Item(gi) {} - /// \brief Sets the iterator to the first arc incoming into or outgoing - /// from the node. + /// Constructor that sets the iterator to the first arc + /// incoming to or outgoing from the given node. + explicit GraphIncIt(const GR&, const Base&) {} + + /// \brief Constructor for conversion from \c INVALID. /// - /// 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. + /// Constructor for conversion from \c INVALID. + /// It initializes the iterator to be invalid. /// \sa Invalid for more details. GraphIncIt(Invalid) {} - /// \brief Assign operator for iterators. + + /// \brief Assignment operator. /// - /// The iterators are assignable. + /// Assignment operator for the iterator. + GraphIncIt& operator=(const GraphIncIt&) { return *this; } + + /// \brief Increment the iterator. /// - GraphIncIt& operator=(GraphIncIt const&) { return *this; } - /// \brief Next item. - /// - /// Assign the iterator to the next item. - /// + /// This operator increments the iterator, i.e. assigns it to the + /// next arc incoming to or outgoing from the given node. GraphIncIt& operator++() { return *this; } /// \brief Equality operator /// + /// 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) - /// + /// Inequality 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;} template struct Constraints { void constraints() { - checkConcept, _GraphIncIt>(); + checkConcept, _GraphIncIt>(); _GraphIncIt it1(graph, node); _GraphIncIt it2; + _GraphIncIt it3 = it1; + _GraphIncIt it4 = INVALID; it2 = ++it1; ++it2 = it1; ++(++it1); - _Item e = it1; + Item e = it1; e = it2; - } - - _Item arc; - _Base node; - _Graph graph; - _GraphIncIt it; + const Base& node; + const GR& graph; }; }; - - /// \brief An empty iterable digraph class. + /// \brief Skeleton class for iterable directed graphs. /// - /// This class provides beside the core digraph features - /// iterator based iterable interface for the digraph structure. + /// This class describes the interface of iterable directed + /// graphs. It extends \ref BaseDigraphComponent with the core + /// iterable interface. /// This concept is part of the Digraph concept. - template - class IterableDigraphComponent : public _Base { + template + class IterableDigraphComponent : public BAS { public: - typedef _Base Base; + typedef BAS Base; typedef typename Base::Node Node; typedef typename Base::Arc Arc; typedef IterableDigraphComponent Digraph; - /// \name Base iteration + /// \name Base Iteration /// - /// This interface provides functions for iteration on digraph items + /// This interface provides functions for iteration on digraph items. /// /// @{ - /// \brief Gives back the first node in the iterating order. + /// \brief Return the first node. /// - /// Gives back the first node in the iterating order. - /// + /// This function gives back the first node in the iteration order. void first(Node&) const {} - /// \brief Gives back the next node in the iterating order. + /// \brief Return the next node. /// - /// Gives back the next node in the iterating order. - /// + /// This function gives back the next node in the iteration order. void next(Node&) const {} - /// \brief Gives back the first arc in the iterating order. + /// \brief Return the first arc. /// - /// Gives back the first arc in the iterating order. - /// + /// This function gives back the first arc in the iteration order. void first(Arc&) const {} - /// \brief Gives back the next arc in the iterating order. + /// \brief Return the next arc. /// - /// Gives back the next arc in the iterating order. - /// + /// This function gives back the next arc in the iteration order. void next(Arc&) const {} - - /// \brief Gives back the first of the arcs point to the given - /// node. + /// \brief Return the first arc incomming to the given node. /// - /// Gives back the first of the arcs point to the given node. - /// + /// This function gives back the first arc incomming to the + /// given node. void firstIn(Arc&, const Node&) const {} - /// \brief Gives back the next of the arcs points to the given - /// node. + /// \brief Return the next arc incomming to the given node. /// - /// Gives back the next of the arcs points to the given node. - /// + /// This function gives back the next arc incomming to the + /// given node. void nextIn(Arc&) const {} - /// \brief Gives back the first of the arcs start from the + /// \brief Return the first arc outgoing form the given node. + /// + /// This function gives back the first arc outgoing form 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. + /// \brief Return the next arc outgoing form the given node. /// - /// Gives back the next of the arcs start from the given node. - /// + /// This function gives back the next arc outgoing form the + /// given node. void nextOut(Arc&) const {} /// @} - /// \name Class based iteration + /// \name Class Based Iteration /// - /// This interface provides functions for iteration on digraph items + /// This interface provides iterator classes for digraph items. /// /// @{ @@ -655,15 +670,15 @@ /// typedef GraphItemIt NodeIt; - /// \brief This iterator goes through each node. + /// \brief This iterator goes through each arc. /// - /// This iterator goes through each node. + /// This iterator goes through each arc. /// typedef GraphItemIt ArcIt; /// \brief This iterator goes trough the incoming arcs of a node. /// - /// This iterator goes trough the \e inccoming arcs of a certain node + /// This iterator goes trough the \e incoming arcs of a certain node /// of a digraph. typedef GraphIncIt InArcIt; @@ -675,26 +690,26 @@ /// \brief The base node of the iterator. /// - /// Gives back the base node of the iterator. - /// It is always the target of the pointed arc. + /// This function gives back the base node of the iterator. + /// It is always the target node 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. + /// This function gives back the running node of the iterator. + /// It is always the source node 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. + /// This function gives back the base node of the iterator. + /// It is always the source node 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. + /// This function gives back the running node of the iterator. + /// It is always the target node of the pointed arc. Node runningNode(const OutArcIt&) const { return INVALID; } /// @} @@ -736,31 +751,31 @@ 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); + const typename _Digraph::InArcIt iait(INVALID); + const typename _Digraph::OutArcIt oait(INVALID); + n = digraph.baseNode(iait); + n = digraph.runningNode(iait); + n = digraph.baseNode(oait); + n = digraph.runningNode(oait); ignore_unused_variable_warning(n); } } const _Digraph& digraph; - }; }; - /// \brief An empty iterable undirected graph class. + /// \brief Skeleton class for iterable undirected graphs. /// - /// This class provides beside the core graph features iterator - /// based iterable interface for the undirected graph structure. + /// This class describes the interface of iterable undirected + /// graphs. It extends \ref IterableDigraphComponent with the core + /// iterable interface of undirected graphs. /// This concept is part of the Graph concept. - template - class IterableGraphComponent : public IterableDigraphComponent<_Base> { + template + class IterableGraphComponent : public IterableDigraphComponent { public: - typedef _Base Base; + typedef BAS Base; typedef typename Base::Node Node; typedef typename Base::Arc Arc; typedef typename Base::Edge Edge; @@ -768,75 +783,71 @@ typedef IterableGraphComponent Graph; - /// \name Base iteration + /// \name Base Iteration /// - /// This interface provides functions for iteration on graph items + /// This interface provides functions for iteration on edges. + /// /// @{ - using IterableDigraphComponent<_Base>::first; - using IterableDigraphComponent<_Base>::next; + using IterableDigraphComponent::first; + using IterableDigraphComponent::next; - /// \brief Gives back the first edge in the iterating - /// order. + /// \brief Return the first edge. /// - /// Gives back the first edge in the iterating order. - /// + /// This function gives back the first edge in the iteration order. void first(Edge&) const {} - /// \brief Gives back the next edge in the iterating - /// order. + /// \brief Return the next edge. /// - /// Gives back the next edge in the iterating order. - /// + /// This function gives back the next edge in the iteration order. void next(Edge&) const {} - - /// \brief Gives back the first of the edges from the + /// \brief Return the first edge incident to the given node. + /// + /// This function gives back the first edge incident to the given + /// node. The bool parameter gives back the direction for which the + /// source node of the directed arc representing the edge is 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. + /// This function gives back the next edge incident to the given + /// node. The bool parameter should be used as \c firstInc() use it. void nextInc(Edge&, bool&) const {} - using IterableDigraphComponent<_Base>::baseNode; - using IterableDigraphComponent<_Base>::runningNode; + using IterableDigraphComponent::baseNode; + using IterableDigraphComponent::runningNode; /// @} - /// \name Class based iteration + /// \name Class Based Iteration /// - /// This interface provides functions for iteration on graph items + /// This interface provides iterator classes for edges. /// /// @{ - /// \brief This iterator goes through each node. + /// \brief This iterator goes through each edge. /// - /// This iterator goes through each node. + /// This iterator goes through each edge. typedef GraphItemIt EdgeIt; - /// \brief This iterator goes trough the incident arcs of a + + /// \brief This iterator goes trough the incident edges of a /// node. /// - /// This iterator goes trough the incident arcs of a certain + /// This iterator goes trough the incident edges of a certain /// node of a graph. - typedef GraphIncIt IncEdgeIt; + typedef GraphIncIt IncEdgeIt; + /// \brief The base node of the iterator. /// - /// Gives back the base node of the iterator. + /// This function gives back the base node of the iterator. Node baseNode(const IncEdgeIt&) const { return INVALID; } /// \brief The running node of the iterator. /// - /// Gives back the running node of the iterator. + /// This function gives back the running node of the iterator. Node runningNode(const IncEdgeIt&) const { return INVALID; } /// @} @@ -865,54 +876,54 @@ checkConcept, typename _Graph::EdgeIt >(); checkConcept, typename _Graph::IncEdgeIt>(); + typename _Graph::Node, 'e'>, typename _Graph::IncEdgeIt>(); typename _Graph::Node n; - typename _Graph::IncEdgeIt ueit(INVALID); - n = graph.baseNode(ueit); - n = graph.runningNode(ueit); + const typename _Graph::IncEdgeIt ieit(INVALID); + n = graph.baseNode(ieit); + n = graph.runningNode(ieit); } } const _Graph& graph; - }; }; - /// \brief An empty alteration notifier digraph class. + /// \brief Skeleton class for alterable directed graphs. /// - /// This class provides beside the core digraph features alteration - /// notifier interface for the digraph structure. This implements + /// This class describes the interface of alterable directed + /// graphs. It extends \ref BaseDigraphComponent with the alteration + /// notifier interface. It 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 + /// alteration occured in the digraph all the observers will be /// notified about it. - template - class AlterableDigraphComponent : public _Base { + template + class AlterableDigraphComponent : public BAS { public: - typedef _Base Base; + typedef BAS Base; typedef typename Base::Node Node; typedef typename Base::Arc Arc; - /// The node observer registry. + /// Node alteration notifier class. typedef AlterationNotifier NodeNotifier; - /// The arc observer registry. + /// Arc alteration notifier class. typedef AlterationNotifier ArcNotifier; - /// \brief Gives back the node alteration notifier. + /// \brief Return the node alteration notifier. /// - /// Gives back the node alteration notifier. + /// This function gives back the node alteration notifier. NodeNotifier& notifier(Node) const { - return NodeNotifier(); + return NodeNotifier(); } - /// \brief Gives back the arc alteration notifier. + /// \brief Return the arc alteration notifier. /// - /// Gives back the arc alteration notifier. + /// This function gives back the arc alteration notifier. ArcNotifier& notifier(Arc) const { return ArcNotifier(); } @@ -932,34 +943,33 @@ } const _Digraph& digraph; - }; - }; - /// \brief An empty alteration notifier undirected graph class. + /// \brief Skeleton class for alterable undirected graphs. /// - /// 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 + /// This class describes the interface of alterable undirected + /// graphs. It extends \ref AlterableDigraphComponent with the alteration + /// notifier interface of undirected graphs. It implements + /// an observer-notifier pattern for the edges. More /// obsevers can be registered into the notifier and whenever an - /// alteration occured in the graph all the observers will + /// alteration occured in the graph all the observers will be /// notified about it. - template - class AlterableGraphComponent : public AlterableDigraphComponent<_Base> { + template + class AlterableGraphComponent : public AlterableDigraphComponent { public: - typedef _Base Base; + typedef BAS Base; typedef typename Base::Edge Edge; - /// The arc observer registry. + /// Edge alteration notifier class. typedef AlterationNotifier EdgeNotifier; - /// \brief Gives back the arc alteration notifier. + /// \brief Return the edge alteration notifier. /// - /// Gives back the arc alteration notifier. + /// This function gives back the edge alteration notifier. EdgeNotifier& notifier(Edge) const { return EdgeNotifier(); } @@ -967,44 +977,48 @@ template struct Constraints { void constraints() { - checkConcept, _Graph>(); + checkConcept, _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 + /// \brief Concept class for standard graph maps. /// - /// This class describes the common interface of the graph maps - /// (NodeMap, ArcMap), that is maps that can be used to - /// associate data to graph descriptors (nodes or arcs). - template - class GraphMap : public ReadWriteMap<_Item, _Value> { + /// This class describes the concept of standard graph maps, i.e. + /// the \c NodeMap, \c ArcMap and \c EdgeMap subtypes of digraph and + /// graph types, which can be used for associating data to graph items. + /// The standard graph maps must conform to the ReferenceMap concept. + template + class GraphMap : public ReferenceMap { + typedef ReferenceMap Parent; + public: - typedef ReadWriteMap<_Item, _Value> Parent; + /// The key type of the map. + typedef K Key; + /// The value type of the map. + typedef V Value; + /// The reference type of the map. + typedef Value& Reference; + /// The const reference type of the map. + typedef const Value& ConstReference; - /// 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; + // The reference map tag. + typedef True ReferenceMapTag; /// \brief Construct a new map. /// /// Construct a new map for the graph. - explicit GraphMap(const Graph&) {} + explicit GraphMap(const GR&) {} /// \brief Construct a new map with default value. /// - /// Construct a new map for the graph and initalise the values. - GraphMap(const Graph&, const Value&) {} + /// Construct a new map for the graph and initalize the values. + GraphMap(const GR&, const Value&) {} private: /// \brief Copy constructor. @@ -1012,9 +1026,9 @@ /// Copy Constructor. GraphMap(const GraphMap&) : Parent() {} - /// \brief Assign operator. + /// \brief Assignment operator. /// - /// Assign operator. It does not mofify the underlying graph, + /// Assignment 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 @@ -1027,53 +1041,55 @@ template struct Constraints { void constraints() { - checkConcept, _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); + checkConcept + , _Map>(); + _Map m1(g); + _Map m2(g,t); + + // Copy constructor + // _Map m3(m); + // Assignment operator // ReadMap cmap; - // b = cmap; + // m3 = cmap; - ignore_unused_variable_warning(a); - ignore_unused_variable_warning(a2); - // ignore_unused_variable_warning(b); + ignore_unused_variable_warning(m1); + ignore_unused_variable_warning(m2); + // ignore_unused_variable_warning(m3); } - const _Map &c; - const Graph &g; + const _Map &m; + const GR &g; const typename GraphMap::Value &t; }; }; - /// \brief An empty mappable digraph class. + /// \brief Skeleton class for mappable directed graphs. /// - /// This class provides beside the core digraph features - /// map interface for the digraph structure. + /// This class describes the interface of mappable directed graphs. + /// It extends \ref BaseDigraphComponent with the standard digraph + /// map classes, namely \c NodeMap and \c ArcMap. /// This concept is part of the Digraph concept. - template - class MappableDigraphComponent : public _Base { + template + class MappableDigraphComponent : public BAS { public: - typedef _Base Base; + typedef BAS Base; typedef typename Base::Node Node; typedef typename Base::Arc Arc; typedef MappableDigraphComponent Digraph; - /// \brief ReadWrite map of the nodes. + /// \brief Standard graph map for the nodes. /// - /// ReadWrite map of the nodes. - /// - template - class NodeMap : public GraphMap { + /// Standard graph map for the nodes. + /// It conforms to the ReferenceMap concept. + template + class NodeMap : public GraphMap { + typedef GraphMap Parent; + public: - typedef GraphMap Parent; - /// \brief Construct a new map. /// /// Construct a new map for the digraph. @@ -1082,8 +1098,8 @@ /// \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) + /// Construct a new map for the digraph and initalize the values. + NodeMap(const MappableDigraphComponent& digraph, const V& value) : Parent(digraph, value) {} private: @@ -1092,26 +1108,26 @@ /// Copy Constructor. NodeMap(const NodeMap& nm) : Parent(nm) {} - /// \brief Assign operator. + /// \brief Assignment operator. /// - /// Assign operator. + /// Assignment operator. template NodeMap& operator=(const CMap&) { - checkConcept, CMap>(); + checkConcept, CMap>(); return *this; } }; - /// \brief ReadWrite map of the arcs. + /// \brief Standard graph map for the arcs. /// - /// ReadWrite map of the arcs. - /// - template - class ArcMap : public GraphMap { + /// Standard graph map for the arcs. + /// It conforms to the ReferenceMap concept. + template + class ArcMap : public GraphMap { + typedef GraphMap Parent; + public: - typedef GraphMap Parent; - /// \brief Construct a new map. /// /// Construct a new map for the digraph. @@ -1120,8 +1136,8 @@ /// \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) + /// Construct a new map for the digraph and initalize the values. + ArcMap(const MappableDigraphComponent& digraph, const V& value) : Parent(digraph, value) {} private: @@ -1130,12 +1146,12 @@ /// Copy Constructor. ArcMap(const ArcMap& nm) : Parent(nm) {} - /// \brief Assign operator. + /// \brief Assignment operator. /// - /// Assign operator. + /// Assignment operator. template ArcMap& operator=(const CMap&) { - checkConcept, CMap>(); + checkConcept, CMap>(); return *this; } @@ -1182,33 +1198,34 @@ } } - _Digraph& digraph; + const _Digraph& digraph; }; }; - /// \brief An empty mappable base bipartite graph class. + /// \brief Skeleton class for mappable undirected graphs. /// - /// This class provides beside the core graph features - /// map interface for the graph structure. + /// This class describes the interface of mappable undirected graphs. + /// It extends \ref MappableDigraphComponent with the standard graph + /// map class for edges (\c EdgeMap). /// This concept is part of the Graph concept. - template - class MappableGraphComponent : public MappableDigraphComponent<_Base> { + template + class MappableGraphComponent : public MappableDigraphComponent { public: - typedef _Base Base; + typedef BAS Base; typedef typename Base::Edge Edge; typedef MappableGraphComponent Graph; - /// \brief ReadWrite map of the edges. + /// \brief Standard graph map for the edges. /// - /// ReadWrite map of the edges. - /// - template - class EdgeMap : public GraphMap { + /// Standard graph map for the edges. + /// It conforms to the ReferenceMap concept. + template + class EdgeMap : public GraphMap { + typedef GraphMap Parent; + public: - typedef GraphMap Parent; - /// \brief Construct a new map. /// /// Construct a new map for the graph. @@ -1217,8 +1234,8 @@ /// \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) + /// Construct a new map for the graph and initalize the values. + EdgeMap(const MappableGraphComponent& graph, const V& value) : Parent(graph, value) {} private: @@ -1227,12 +1244,12 @@ /// Copy Constructor. EdgeMap(const EdgeMap& nm) : Parent(nm) {} - /// \brief Assign operator. + /// \brief Assignment operator. /// - /// Assign operator. + /// Assignment operator. template EdgeMap& operator=(const CMap&) { - checkConcept, CMap>(); + checkConcept, CMap>(); return *this; } @@ -1249,7 +1266,7 @@ }; void constraints() { - checkConcept, _Graph>(); + checkConcept, _Graph>(); { // int map test typedef typename _Graph::template EdgeMap IntEdgeMap; @@ -1266,35 +1283,35 @@ } } - _Graph& graph; + const _Graph& graph; }; }; - /// \brief An empty extendable digraph class. + /// \brief Skeleton class for extendable directed graphs. /// - /// 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 - class ExtendableDigraphComponent : public _Base { + /// This class describes the interface of extendable directed graphs. + /// It extends \ref BaseDigraphComponent with functions for adding + /// nodes and arcs to the digraph. + /// This concept requires \ref AlterableDigraphComponent. + template + class ExtendableDigraphComponent : public BAS { public: - typedef _Base Base; + typedef BAS Base; - typedef typename _Base::Node Node; - typedef typename _Base::Arc Arc; + typedef typename Base::Node Node; + typedef typename Base::Arc Arc; - /// \brief Adds a new node to the digraph. + /// \brief Add a new node to the digraph. /// - /// Adds a new node to the digraph. - /// + /// This function adds a new node to the digraph. Node addNode() { return INVALID; } - /// \brief Adds a new arc connects the given two nodes. + /// \brief Add a new arc connecting the given two nodes. /// - /// Adds a new arc connects the the given two nodes. + /// This function adds a new arc connecting the given two nodes + /// of the digraph. Arc addArc(const Node&, const Node&) { return INVALID; } @@ -1314,33 +1331,32 @@ }; }; - /// \brief An empty extendable base undirected graph class. + /// \brief Skeleton class for extendable undirected graphs. /// - /// 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 - class ExtendableGraphComponent : public _Base { + /// This class describes the interface of extendable undirected graphs. + /// It extends \ref BaseGraphComponent with functions for adding + /// nodes and edges to the graph. + /// This concept requires \ref AlterableGraphComponent. + template + class ExtendableGraphComponent : public BAS { public: - typedef _Base Base; - typedef typename _Base::Node Node; - typedef typename _Base::Edge Edge; + typedef BAS Base; + typedef typename Base::Node Node; + typedef typename Base::Edge Edge; - /// \brief Adds a new node to the graph. + /// \brief Add a new node to the digraph. /// - /// Adds a new node to the graph. - /// + /// This function adds a new node to the digraph. Node addNode() { return INVALID; } - /// \brief Adds a new arc connects the given two nodes. + /// \brief Add a new edge connecting the given two nodes. /// - /// Adds a new arc connects the the given two nodes. - Edge addArc(const Node&, const Node&) { + /// This function adds a new edge connecting the given two nodes + /// of the graph. + Edge addEdge(const Node&, const Node&) { return INVALID; } @@ -1359,39 +1375,38 @@ }; }; - /// \brief An empty erasable digraph class. + /// \brief Skeleton class for erasable directed graphs. /// - /// 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 - class ErasableDigraphComponent : public _Base { + /// This class describes the interface of erasable directed graphs. + /// It extends \ref BaseDigraphComponent with functions for removing + /// nodes and arcs from the digraph. + /// This concept requires \ref AlterableDigraphComponent. + template + class ErasableDigraphComponent : public BAS { public: - typedef _Base Base; + typedef BAS 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. + /// This function erases the given node from the digraph and all arcs + /// connected to the node. void erase(const Node&) {} /// \brief Erase an arc from the digraph. /// - /// Erase an arc from the digraph. - /// + /// This function erases the given arc from the digraph. void erase(const Arc&) {} template struct Constraints { void constraints() { checkConcept(); - typename _Digraph::Node node; + const typename _Digraph::Node node(INVALID); digraph.erase(node); - typename _Digraph::Arc arc; + const typename _Digraph::Arc arc(INVALID); digraph.erase(arc); } @@ -1399,39 +1414,38 @@ }; }; - /// \brief An empty erasable base undirected graph class. + /// \brief Skeleton class for erasable undirected graphs. /// - /// 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 - class ErasableGraphComponent : public _Base { + /// This class describes the interface of erasable undirected graphs. + /// It extends \ref BaseGraphComponent with functions for removing + /// nodes and edges from the graph. + /// This concept requires \ref AlterableGraphComponent. + template + class ErasableGraphComponent : public BAS { public: - typedef _Base Base; + typedef BAS 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. + /// This function erases the given node from the graph and all edges + /// connected to the node. void erase(const Node&) {} - /// \brief Erase an arc from the graph. + /// \brief Erase an edge from the digraph. /// - /// Erase an arc from the graph. - /// + /// This function erases the given edge from the digraph. void erase(const Edge&) {} template struct Constraints { void constraints() { checkConcept(); - typename _Graph::Node node; + const typename _Graph::Node node(INVALID); graph.erase(node); - typename _Graph::Edge edge; + const typename _Graph::Edge edge(INVALID); graph.erase(edge); } @@ -1439,22 +1453,21 @@ }; }; - /// \brief An empty clearable base digraph class. + /// \brief Skeleton class for clearable directed graphs. /// - /// 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 - class ClearableDigraphComponent : public _Base { + /// This class describes the interface of clearable directed graphs. + /// It extends \ref BaseDigraphComponent with a function for clearing + /// the digraph. + /// This concept requires \ref AlterableDigraphComponent. + template + class ClearableDigraphComponent : public BAS { public: - typedef _Base Base; + typedef BAS Base; /// \brief Erase all nodes and arcs from the digraph. /// - /// Erase all nodes and arcs from the digraph. - /// + /// This function erases all nodes and arcs from the digraph. void clear() {} template @@ -1464,29 +1477,35 @@ digraph.clear(); } - _Digraph digraph; + _Digraph& digraph; }; }; - /// \brief An empty clearable base undirected graph class. + /// \brief Skeleton class for clearable undirected graphs. /// - /// 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 - class ClearableGraphComponent : public ClearableDigraphComponent<_Base> { + /// This class describes the interface of clearable undirected graphs. + /// It extends \ref BaseGraphComponent with a function for clearing + /// the graph. + /// This concept requires \ref AlterableGraphComponent. + template + class ClearableGraphComponent : public ClearableDigraphComponent { public: - typedef _Base Base; + typedef BAS Base; + + /// \brief Erase all nodes and edges from the graph. + /// + /// This function erases all nodes and edges from the graph. + void clear() {} template struct Constraints { void constraints() { - checkConcept, _Graph>(); + checkConcept(); + graph.clear(); } - _Graph graph; + _Graph& graph; }; };