/usr/include/dune/grid/common/entityseed.hh is in libdune-grid-dev 2.5.1-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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// vi: set et ts=4 sw=2 sts=2:
#ifndef DUNE_GRID_ENTITY_SEED_HH
#define DUNE_GRID_ENTITY_SEED_HH
#include <dune/grid/common/grid.hh>
/** \file
* \brief Interface class EntitySeed
*/
namespace Dune {
/** \brief Store a reference to an entity with a minimal memory footprint
*
* The EntitySeed provides a light-weight way to store an entity. It is supposed
* to be implemented as memory-efficiently as possible. To get back the actual
* entity, you need the corresponding grid.
* On the grid, there is the method entity(const EntitySeed&), which
* gives you an Entity in exchange for an EntitySeed.
*/
template<class GridImp, class EntitySeedImp>
class EntitySeed
{
public:
//! codimension of underlying entity
enum { codimension = EntitySeedImp::codimension };
//! Export the implementation type
typedef EntitySeedImp Implementation;
/** \brief Construct an empty (i.e. isValid() == false) seed */
EntitySeed()
{}
/** \brief Construct from implementation class */
EntitySeed(const EntitySeedImp& implementation)
: implementation_(implementation)
{}
/** \brief check whether it is safe to create an Entity from this Seed */
bool isValid() const
{
return implementation_.isValid();
}
#if DUNE_GRID_EXPERIMENTAL_GRID_EXTENSIONS
public:
#else
protected:
// give the GridDefaultImplementation class access to the impl
friend class GridDefaultImplementation<
GridImp::dimension, GridImp::dimensionworld,
typename GridImp::ctype,
typename GridImp::GridFamily> ;
#endif
/** \brief Access to the actual implementation */
Implementation& impl()
{
return implementation_;
}
/** \brief const Access to the actual implementation */
const Implementation& impl() const
{
return implementation_;
}
private:
/** \brief The actual implementation class */
EntitySeedImp implementation_;
};
} // end namespace Dune
#endif
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