identitygridhierarchiciterator.hh

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// SPDX-FileCopyrightText: Copyright (C) DUNE Project contributors, see file LICENSE.md in module root
// SPDX-License-Identifier: LicenseRef-GPL-2.0-only-with-DUNE-exception
// -*- tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*-
// vi: set et ts=4 sw=2 sts=2:
#ifndef DUNE_IDENTITYGRIDHIERITERATOR_HH
#define DUNE_IDENTITYGRIDHIERITERATOR_HH
 
namespace Dune {
 
 
  //**********************************************************************
  //
  template<class GridImp>
  class IdentityGridHierarchicIterator
  {
 
    // Type of the corresponding HierarchicIterator in the host grid
    typedef typename GridImp::HostGridType::template Codim<0>::Entity::HierarchicIterator HostGridHierarchicIterator;
 
  public:
 
    constexpr static int codimension = 0;
 
    typedef typename GridImp::template Codim<0>::Entity Entity;
 
    explicit IdentityGridHierarchicIterator(const GridImp* identityGrid, const Entity& startEntity, int maxLevel) :
      identityGrid_(identityGrid),
      hostHierarchicIterator_(startEntity.impl().hostEntity_.hbegin(maxLevel))
    {}
 
 
    explicit IdentityGridHierarchicIterator(const GridImp* identityGrid, const Entity& startEntity, int maxLevel, [[maybe_unused]] bool endDummy) :
      identityGrid_(identityGrid),
      hostHierarchicIterator_(startEntity.impl().hostEntity_.hend(maxLevel))
    {}
 
 
    void increment()
    {
      ++hostHierarchicIterator_;
    }
 
    Entity dereference() const {
      return Entity{{identityGrid_,*hostHierarchicIterator_}};
    }
 
    bool equals(const IdentityGridHierarchicIterator& i) const {
      return hostHierarchicIterator_ == i.hostHierarchicIterator_;
    }
 
  private:
    const GridImp* identityGrid_;
 
    HostGridHierarchicIterator hostHierarchicIterator_;
 
  };
 
 
}  // end namespace Dune
 
#endif