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// PR c++/44778

enum Healpix_Ordering_Scheme { RING, NEST };

class Healpix_Base

  {

  protected:

    Healpix_Ordering_Scheme scheme_;

    int nest2ring (int pix) const;

    int ring2nest (int pix) const;

    typedef int (Healpix_Base::*swapfunc)(int pix) const;

  };

template class Healpix_Map: public Healpix_Base

  {

  public:

    void Import_nograde (const Healpix_Map &orig)

      {

        swapfunc swapper = (scheme_ == NEST) ?

          &Healpix_Map::ring2nest : &Healpix_Map::nest2ring;

      }

  };

int main()

  {

  Healpix_Map a,b;

  a.Import_nograde(b);

  }