/usr/include/dune/grid/onedgrid/onedgridentityseed.hh is in libdune-grid-dev 2.3.1-1.
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// vi: set et ts=4 sw=2 sts=2:
#ifndef DUNE_ONE_D_GRID_ENTITY_SEED_HH
#define DUNE_ONE_D_GRID_ENTITY_SEED_HH
#include "onedgridentity.hh"
#include <dune/common/nullptr.hh>
/** \file
* \brief Implementation of EntitySeed for the OneDGrid grid manager
*/
namespace Dune {
/** \brief Store a reference to an entity with a minimal memory footprint
*/
template<int codim, class GridImp>
class OneDGridEntitySeed
{
// grid dimension
enum { dim = GridImp::dimension };
public:
enum { codimension = codim };
//! default construct an invalid entity seed
OneDGridEntitySeed ()
: target_(nullptr)
{}
//! construct entity seed from entity
OneDGridEntitySeed (const OneDGridEntity<codim,dim,GridImp>& entity)
: target_(entity.target_)
{}
//! check whether the EntitySeed refers to a valid Entity
bool isValid() const
{
return target_ != nullptr;
}
/** \brief Access to the underlying OneDGrid data structure */
OneDEntityImp<dim-codim>* target() const
{
return target_;
}
private:
/** \brief Plain old pointer to the corresponding OneDGrid data structure */
OneDEntityImp<dim-codim>* target_;
};
} // end namespace Dune
#endif
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