geometrygrid/capabilities.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_GEOGRID_CAPABILITIES_HH
#define DUNE_GEOGRID_CAPABILITIES_HH
 
#include <cassert>
#include <type_traits>
#include <utility>
 
#include <dune/common/hybridutilities.hh>
 
#include <dune/grid/common/capabilities.hh>
#include <dune/grid/geometrygrid/declaration.hh>
 
namespace Dune
{
 
  // Capabilities
  // ------------
 
  namespace Capabilities
  {
 
    // Capabilities from dune-grid
    // ---------------------------
 
    template< class HostGrid, class CoordFunction, class Allocator >
    struct hasSingleGeometryType< GeometryGrid< HostGrid, CoordFunction, Allocator > >
    {
      static const bool v = hasSingleGeometryType< HostGrid > :: v;
      static const unsigned int topologyId = hasSingleGeometryType< HostGrid > :: topologyId;
    };
 
 
    template< class HostGrid, class CoordFunction, class Allocator, int codim >
    struct hasEntity< GeometryGrid< HostGrid, CoordFunction, Allocator >, codim >
    {
      static const bool v = true;
    };
 
 
    template< class HostGrid, class CoordFunction, class Allocator, int codim >
    struct hasEntityIterator< GeometryGrid< HostGrid, CoordFunction, Allocator >, codim >
    {
      static const bool v = hasEntityIterator<HostGrid, codim>::v;
    };
 
 
    template< class HostGrid, class CoordFunction, class Allocator, int codim >
    struct canCommunicate< GeometryGrid< HostGrid, CoordFunction, Allocator >, codim >
    {
      static const bool v = canCommunicate< HostGrid, codim >::v && hasEntity< HostGrid, codim >::v;
    };
 
 
    template< class HostGrid, class CoordFunction, class Allocator >
    struct hasBackupRestoreFacilities< GeometryGrid< HostGrid, CoordFunction, Allocator > >
    {
      static const bool v = hasBackupRestoreFacilities< HostGrid >::v && std::is_default_constructible< CoordFunction >::value;
    };
 
    template< class HostGrid, class CoordFunction, class Allocator >
    struct isLevelwiseConforming< GeometryGrid< HostGrid, CoordFunction, Allocator > >
    {
      static const bool v = isLevelwiseConforming< HostGrid >::v;
    };
 
    template< class HostGrid, class CoordFunction, class Allocator >
    struct isLeafwiseConforming< GeometryGrid< HostGrid, CoordFunction, Allocator > >
    {
      static const bool v = isLeafwiseConforming< HostGrid >::v;
    };
 
    template< class HostGrid, class CoordFunction, class Allocator >
    struct threadSafe< GeometryGrid< HostGrid, CoordFunction, Allocator > >
    {
      static const bool v = false;
    };
 
    template< class HostGrid, class CoordFunction, class Allocator >
    struct viewThreadSafe< GeometryGrid< HostGrid, CoordFunction, Allocator > >
    {
      static const bool v = false;
    };
 
 
 
 
    // hasHostEntity
    // -------------
 
    template< class Grid, int codim >
    struct hasHostEntity;
 
    template< class Grid, int codim >
    struct hasHostEntity< const Grid, codim >
    {
      static const bool v = hasHostEntity< Grid, codim >::v;
    };
 
    template< class HostGrid, class CoordFunction, class Allocator, int codim >
    struct hasHostEntity< GeometryGrid< HostGrid, CoordFunction, Allocator >, codim >
    {
      static const bool v = hasEntity< HostGrid, codim >::v;
    };
 
 
 
    // CodimCache
    // ----------
 
    template< class Grid >
    class CodimCache
    {
      static const int dimension = Grid::dimension;
 
      bool hasHostEntity_[ Grid::dimension + 1 ];
 
      CodimCache ()
      {
        Hybrid::forEach( std::make_index_sequence< dimension+1 >{},
          [ & ]( auto i ){ hasHostEntity_[ i ] = Capabilities::hasHostEntity< Grid, i >::v; } );
      }
 
      static CodimCache &instance ()
      {
        static CodimCache singleton;
        return singleton;
      }
 
    public:
      static bool hasHostEntity ( int codim )
      {
        assert( (codim >= 0) && (codim <= dimension) );
        return instance().hasHostEntity_[ codim ];
      }
    };
 
  } // namespace Capabilities
 
} // namespace Dune
 
#endif // #ifndef DUNE_GEOGRID_CAPABILITIES_HH