seriesstepper.h

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// include guard
#ifndef AFF_SERIESSTEPPER_H_VERSION

#define AFF_SERIESSTEPPER_H_VERSION \
  "AFF_SERIESSTEPPER_H   V1.2"

#include<aff/lib/types.h>

namespace aff {
namespace util {

  class SeriesStepper 
  {
    public:
      SeriesStepper(const LinearShape& shape):
        Mfirst_offset(shape.offset(shape.first())),
        Mlast_offset(shape.offset(shape.last())),
        Mbase(shape.base()),
        Mcurrent(Mfirst_offset), Mvalid(true) { }
      const Tsubscript& current() const { return(Mcurrent); }
      Tsubscript index() const { return(Mcurrent+Mbase); }
      SeriesStepper& incr();
      SeriesStepper& decr();
      bool more() const
      { return(Mcurrent<Mlast_offset); }
      bool less() const
      { return(Mcurrent>Mfirst_offset); }
      const bool& valid() const
      { return(Mvalid); }
      SeriesStepper& tofirst();
      SeriesStepper& tolast();
    private:
      Tsubscript Mfirst_offset, Mlast_offset;
      Tsubscript Mbase;
      Tsubscript Mcurrent;
      bool Mvalid;
  }; // class SeriesStepper

} // namespace util
} // namespace aff

#endif // AFF_SERIESSTEPPER_H_VERSION (includeguard)

/* ----- END OF seriesstepper.h ----- */