LoHiSide.H

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// National Laboratory.  Permission is granted to reproduce
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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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