grid/entityseed.hh

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// -*- tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*-
// vi: set et ts=4 sw=2 sts=2:
#ifndef DUNE_MMESH_GRID_ENTITYSEED_HH
#define DUNE_MMESH_GRID_ENTITYSEED_HH
 
namespace Dune {
 
template <int codim, class GridImp>
class MMeshEntitySeed {
 protected:
  // Entity type of the hostgrid
  typedef typename GridImp::template HostGridEntity<codim> HostGridEntity;
 
 public:
  enum { codimension = codim };
 
  MMeshEntitySeed() {}
 
  MMeshEntitySeed(const HostGridEntity& hostEntity) : hostEntity_(hostEntity) {}
 
  MMeshEntitySeed& operator=(const MMeshEntitySeed<codim, GridImp>& seed) {
    if (this != &seed) hostEntity_ = seed.hostEntity_;
    return *this;
  }
 
  template <int cd = codim>
  std::enable_if_t<cd != 2 || GridImp::dimension != 3, bool> isValid() const {
    return hostEntity_ != HostGridEntity();
  }
 
  template <int cd = codim>
  std::enable_if_t<cd == 2 && GridImp::dimension == 3, bool> isValid() const {
    return hostEntity_.first != HostGridEntity().first;
  }
 
  const HostGridEntity& hostEntity() const { return hostEntity_; }
 
 private:
  HostGridEntity hostEntity_;
};
 
}  // namespace Dune
 
#endif