identitygridleveliterator.hh

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// SPDX-FileCopyrightText: Copyright © 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_IDENTITYGRIDLEVELITERATOR_HH
#define DUNE_IDENTITYGRIDLEVELITERATOR_HH
 
#include <dune/grid/common/gridenums.hh>
 
namespace Dune {
 
  template<int codim, PartitionIteratorType pitype, class GridImp>
  class IdentityGridLevelIterator
  {
 
    typedef typename GridImp::HostGridType::Traits::template Codim<codim>::template Partition<pitype>::LevelIterator HostGridLevelIterator;
 
  public:
 
    constexpr static int codimension = codim;
 
    typedef typename GridImp::template Codim<codim>::Entity Entity;
 
    explicit IdentityGridLevelIterator(const GridImp* identityGrid, int level)
    : identityGrid_(identityGrid),
      hostLevelIterator_(identityGrid->hostgrid_->levelGridView(level).template begin<codim,pitype>())
    {}
 
 
    explicit IdentityGridLevelIterator(const GridImp* identityGrid, int level, [[maybe_unused]] bool endDummy)
    : identityGrid_(identityGrid),
      hostLevelIterator_(identityGrid->hostgrid_->levelGridView(level).template end<codim,pitype>())
    {}
 
 
    void increment() {
      ++hostLevelIterator_;
    }
 
    Entity dereference() const {
      return Entity{{identityGrid_,*hostLevelIterator_}};
    }
 
    bool equals(const IdentityGridLevelIterator& i) const {
      return hostLevelIterator_ == i.hostLevelIterator_;
    }
 
  private:
    const GridImp* identityGrid_;
 
    HostGridLevelIterator hostLevelIterator_;
  };
 
 
}  // namespace Dune
 
#endif