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