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LoHiSide.H

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//
// This software is copyright (C) by the Lawrence Berkeley
// National Laboratory.  Permission is granted to reproduce
// this software for non-commercial purposes provided that
// this notice is left intact.
// 
// It is acknowledged that the U.S. Government has rights to
// this software under Contract DE-AC03-765F00098 between
// the U.S.  Department of Energy and the University of
// California.
//
// This software is provided as a professional and academic
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// documentation. By using this software, you acknowledge
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//

#ifndef _LOHISIDE_H_
#define _LOHISIDE_H_


class Side
{
public:

  enum LoHiSide {Invalid=-1, Lo=0, Hi, NUMSIDES};
  Side() {};
  ~Side() {};

  friend 
  Side::LoHiSide 
  flip(Side::LoHiSide side);

  static 
  Side::LoHiSide 
  flip(Side::LoHiSide side);


  friend
  int 
  sign(Side::LoHiSide side);


};




class SideIterator
{
public:



  SideIterator();


  ~SideIterator() {};



  void begin();


  void reset()
  {begin();}

  void next();


  void operator++();

   

  Side::LoHiSide operator() () const;


  bool ok() const;

private:
  int current;
};

#endif

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