dof_iterator_selector.h

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// ------------------------------------------------------------------------
//
// SPDX-License-Identifier: LGPL-2.1-or-later
// Copyright (C) 2002 - 2023 by the deal.II authors
//
// This file is part of the deal.II library.
//
// Part of the source code is dual licensed under Apache-2.0 WITH
// LLVM-exception OR LGPL-2.1-or-later. Detailed license information
// governing the source code and code contributions can be found in
// LICENSE.md and CONTRIBUTING.md at the top level directory of deal.II.
//
// ------------------------------------------------------------------------
 
#ifndef dealii_dof_iterators_h
#define dealii_dof_iterators_h
 
#include <deal.II/base/config.h>
 
 
DEAL_II_NAMESPACE_OPEN
 
// Forward declarations
#ifndef DOXYGEN
template <int, int, int>
class DoFInvalidAccessor;
 
template <int structdim, int dim, int spacedim, bool lda>
class DoFAccessor;
template <int dim, int spacedim, bool lda>
class DoFCellAccessor;
 
template <int dim, int spacedim>
DEAL_II_CXX20_REQUIRES((concepts::is_valid_dim_spacedim<dim, spacedim>))
class DoFHandler;
 
template <typename Accessor>
class TriaRawIterator;
template <typename Accessor>
class TriaIterator;
template <typename Accessor>
class TriaActiveIterator;
#endif
 
namespace internal
{
  namespace DoFHandlerImplementation
  {
    template <int dim, int spacedim, bool lda = false>
    struct Iterators;
 
 
    template <int spacedim, bool lda>
    struct Iterators<1, spacedim, lda>
    {
      using CellAccessor = ::DoFCellAccessor<1, spacedim, lda>;
      using FaceAccessor = ::DoFAccessor<0, 1, spacedim, lda>;
 
      using raw_line_iterator    = TriaRawIterator<CellAccessor>;
      using line_iterator        = TriaIterator<CellAccessor>;
      using active_line_iterator = TriaActiveIterator<CellAccessor>;
 
      using raw_quad_iterator =
        TriaRawIterator<DoFInvalidAccessor<2, 1, spacedim>>;
      using quad_iterator = TriaIterator<DoFInvalidAccessor<2, 1, spacedim>>;
      using active_quad_iterator =
        TriaActiveIterator<DoFInvalidAccessor<2, 1, spacedim>>;
 
      using raw_hex_iterator =
        TriaRawIterator<DoFInvalidAccessor<3, 1, spacedim>>;
      using hex_iterator = TriaIterator<DoFInvalidAccessor<3, 1, spacedim>>;
      using active_hex_iterator =
        TriaActiveIterator<DoFInvalidAccessor<3, 1, spacedim>>;
 
      using raw_cell_iterator    = raw_line_iterator;
      using cell_iterator        = line_iterator;
      using active_cell_iterator = active_line_iterator;
 
      using raw_face_iterator    = TriaRawIterator<FaceAccessor>;
      using face_iterator        = TriaIterator<FaceAccessor>;
      using active_face_iterator = TriaActiveIterator<FaceAccessor>;
    };
 
 
 
    template <int spacedim, bool lda>
    struct Iterators<2, spacedim, lda>
    {
      using CellAccessor = ::DoFCellAccessor<2, spacedim, lda>;
      using FaceAccessor = ::DoFAccessor<1, 2, spacedim, lda>;
 
      using raw_line_iterator    = TriaRawIterator<FaceAccessor>;
      using line_iterator        = TriaIterator<FaceAccessor>;
      using active_line_iterator = TriaActiveIterator<FaceAccessor>;
 
      using raw_quad_iterator    = TriaRawIterator<CellAccessor>;
      using quad_iterator        = TriaIterator<CellAccessor>;
      using active_quad_iterator = TriaActiveIterator<CellAccessor>;
 
      using raw_hex_iterator =
        TriaRawIterator<DoFInvalidAccessor<3, 2, spacedim>>;
      using hex_iterator = TriaIterator<DoFInvalidAccessor<3, 2, spacedim>>;
      using active_hex_iterator =
        TriaActiveIterator<DoFInvalidAccessor<3, 2, spacedim>>;
 
      using raw_cell_iterator    = raw_quad_iterator;
      using cell_iterator        = quad_iterator;
      using active_cell_iterator = active_quad_iterator;
 
      using raw_face_iterator    = raw_line_iterator;
      using face_iterator        = line_iterator;
      using active_face_iterator = active_line_iterator;
    };
 
 
 
    template <int spacedim, bool lda>
    struct Iterators<3, spacedim, lda>
    {
      using CellAccessor = ::DoFCellAccessor<3, spacedim, lda>;
      using FaceAccessor = ::DoFAccessor<2, 3, spacedim, lda>;
 
      using raw_line_iterator =
        TriaRawIterator<::DoFAccessor<1, 3, spacedim, lda>>;
      using line_iterator =
        TriaIterator<::DoFAccessor<1, 3, spacedim, lda>>;
      using active_line_iterator =
        TriaActiveIterator<::DoFAccessor<1, 3, spacedim, lda>>;
 
      using raw_quad_iterator    = TriaRawIterator<FaceAccessor>;
      using quad_iterator        = TriaIterator<FaceAccessor>;
      using active_quad_iterator = TriaActiveIterator<FaceAccessor>;
 
      using raw_hex_iterator    = TriaRawIterator<CellAccessor>;
      using hex_iterator        = TriaIterator<CellAccessor>;
      using active_hex_iterator = TriaActiveIterator<CellAccessor>;
 
      using raw_cell_iterator    = raw_hex_iterator;
      using cell_iterator        = hex_iterator;
      using active_cell_iterator = active_hex_iterator;
 
      using raw_face_iterator    = raw_quad_iterator;
      using face_iterator        = quad_iterator;
      using active_face_iterator = active_quad_iterator;
    };
  } // namespace DoFHandlerImplementation
} // namespace internal
 
DEAL_II_NAMESPACE_CLOSE
 
#endif // dealii_dof_iterator_selector_h