interfaces.hh

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#ifndef DUNE_ALUGRID_INTERFACES_HH
#define DUNE_ALUGRID_INTERFACES_HH
 
#include <type_traits>
 
namespace Dune {
 
  struct HasObjectStream {};
 
  template <bool hasStream, class GridImp, class DefaultImp>
  struct GridObjectStreamOrDefaultHelper {
    typedef typename GridImp::InStreamType     InStreamType;
    typedef typename GridImp::OutStreamType    OutStreamType;
  };
 
  template <class GridImp, class DefaultImp>
  struct GridObjectStreamOrDefaultHelper<false, GridImp, DefaultImp> {
    typedef DefaultImp InStreamType;
    typedef DefaultImp OutStreamType;
  };
 
  template <class GridImp, class DefaultImp>
  struct GridObjectStreamOrDefault
  {
    typedef GridObjectStreamOrDefaultHelper<
                std::is_base_of< HasObjectStream, GridImp >::value,
                GridImp,
                DefaultImp> GridObjectStreamTraits;
 
    typedef typename GridObjectStreamTraits :: InStreamType   InStreamType;  //  read  stream
    typedef typename GridObjectStreamTraits :: OutStreamType  OutStreamType; //  write stream
  };
 
  struct IsDofManager {};
 
  struct HasHierarchicIndexSet {};
 
} // end namespace Dune
#endif