undiGraph.h

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 *       - Christophe GONZALES(_at_AMU)                                     *
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 *       - Pierre-Henri WUILLEMIN(_at_LIP6)                                 *
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#ifndef GUM_UNDIGRAPH_H
#define GUM_UNDIGRAPH_H
 
#include <iostream>
#include <optional>
#include <utility>
 
#include <agrum/agrum.h>
 
#include <agrum/base/graphs/graphConcepts.h>
#include <agrum/base/graphs/parts/edgeGraphPart.h>
#include <agrum/base/graphs/parts/nodeGraphPart.h>
 
namespace gum {
 
  /* ===========================================================================
   */
  /* ===          BASE CLASS FOR MANIPULATING ALL UNDIRECTED GRAPHS          ===
   */
  /* ===========================================================================
   */
  /* ===========================================================================
   */
 
  class UndiGraph: public virtual NodeGraphPart, public EdgeGraphPart {
    public:
    // ############################################################################
    // ############################################################################


    explicit UndiGraph(Size nodes_size          = HashTableConst::default_size,
                       bool nodes_resize_policy = true,
                       Size edges_size          = HashTableConst::default_size,
                       bool edges_resize_policy = true);


    UndiGraph(const UndiGraph& g);

    UndiGraph(UndiGraph&& g);

    ~UndiGraph() override;

    static UndiGraph completeGraph(int n);

 
    // ############################################################################
    // ############################################################################


    UndiGraph& operator=(const UndiGraph& g);

    UndiGraph& operator=(UndiGraph&& g);


    // not virtual : it is a feature !!! :)
    bool operator==(const UndiGraph& g) const;

    // ############################################################################
    // ############################################################################


    void addEdge(NodeId first, NodeId second) override;


    void eraseNode(NodeId id) override;

    void clear() override;

    std::string toString() const override;

    virtual std::string toDot() const;

    bool hasUndirectedCycle() const;

    virtual UndiGraph partialUndiGraph(NodeSet nodes);

    NodeProperty< NodeId > chainComponents() const;

    NodeProperty< NodeId > connectedComponents() const;

    std::optional< std::vector< NodeId > > undirectedPath(NodeId node1, NodeId node2) const;

    bool hasUndirectedPath(NodeId n1, NodeId n2) const;


    bool hasUndirectedPath(NodeId n1, NodeId n2, const NodeSet& except) const;

    bool hasUndirectedPath(const NodeSet& n1, const NodeSet& n2, const NodeSet& except) const;

  };

  std::ostream& operator<<(std::ostream&, const UndiGraph&);
 
} /* namespace gum */
 
static_assert(gum::GUM_UndiGraphable< gum::UndiGraph >);
 
#ifndef GUM_NO_INLINE
#  include <agrum/base/graphs/undiGraph_inl.h>
#endif   // GU%_NO_INLINE
 
#endif   /* GUM_UNDIGRAPH_H */