// Copyright (c) 2006 Foundation for Research and Technology-Hellas (Greece).
// All rights reserved.
//
// This file is part of CGAL (www.cgal.org).
//
// $URL: https://github.com/CGAL/cgal/blob/v6.1/Voronoi_diagram_2/include/CGAL/Voronoi_diagram_2/Identity_rejectors.h $
// $Id: include/CGAL/Voronoi_diagram_2/Identity_rejectors.h b26b07a1242 $
// SPDX-License-Identifier: GPL-3.0-or-later OR LicenseRef-Commercial
//
//
// Author(s)     : Menelaos Karavelas <mkaravel@iacm.forth.gr>

#ifndef CGAL_VORONOI_DIAGRAM_2_IDENTITY_REJECTORS_H
#define CGAL_VORONOI_DIAGRAM_2_IDENTITY_REJECTORS_H 1

#include <CGAL/license/Voronoi_diagram_2.h>


#include <CGAL/Voronoi_diagram_2/basic.h>

namespace CGAL {

namespace VoronoiDiagram_2 { namespace Internal {

//=========================================================================
//=========================================================================

struct Rejector_base
{
  inline void clear() {}
  inline void swap(Rejector_base&) {}
  inline bool is_valid() const { return true; }
};

//=========================================================================
//=========================================================================

template<class DG>
struct Identity_edge_rejector
  : public Rejector_base
{
  typedef DG                  Delaunay_graph;
  typedef bool                result_type;

  typedef typename Delaunay_graph::Edge                   Edge;
  typedef typename Delaunay_graph::Face_handle            Face_handle;
  typedef typename Delaunay_graph::Edge_circulator        Edge_circulator;
  typedef typename Delaunay_graph::All_edges_iterator     All_edges_iterator;
  typedef typename Delaunay_graph::Finite_edges_iterator  Finite_edges_iterator;

  bool operator()(const Delaunay_graph& ,
                  const Face_handle& , int ) const {
    return false;
  }

  // handles Edge, All_edges_iterator, Finite_edges_iterator, Edge_circulator...
  // use a single template in case some of these types (typically All_edges_iterator
  // and Finite_edges_iterator) are equal

  template <typename E>
  bool operator()(const Delaunay_graph& , const E& ) const {
    return false;
  }
};

//=========================================================================
//=========================================================================

template<class DG>
struct Identity_face_rejector
  : public Rejector_base
{
  typedef DG                  Delaunay_graph;
  typedef bool                result_type;

  typedef typename Delaunay_graph::Vertex_handle  Vertex_handle;

  bool operator()(const Delaunay_graph&, const Vertex_handle&) const {
    return false;
  }
};

//=========================================================================
//=========================================================================


} } //namespace VoronoiDiagram_2::Internal

} //namespace CGAL


#endif // CGAL_VORONOI_DIAGRAM_2_IDENTITY_REJECTORS_H

