mi32/bool3.h

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#ifndef  INC_MI32_BOOL3_H
#define  INC_MI32_BOOL3_H


enum BOOL3_VALUE {
   BOOL3_Unknown = -1,     
   BOOL3_False = 0,        
   BOOL3_True = 1          
   };

inline BOOL3_VALUE operator! (BOOL3_VALUE rhs)
   { return ((rhs == BOOL3_False) ? BOOL3_True : (rhs == BOOL3_True) ? BOOL3_False : BOOL3_Unknown); }

inline BOOL3_VALUE operator&& (BOOL3_VALUE lhs, BOOL3_VALUE rhs)
   { return ((lhs == BOOL3_False || rhs == BOOL3_False) ? BOOL3_False : (lhs == BOOL3_True && rhs == BOOL3_True) ? BOOL3_True : BOOL3_Unknown); }

inline BOOL3_VALUE operator|| (BOOL3_VALUE lhs, BOOL3_VALUE rhs)
   { return ((lhs == BOOL3_True || rhs == BOOL3_True) ? BOOL3_True : (lhs == BOOL3_False && rhs == BOOL3_False) ? BOOL3_False : BOOL3_Unknown); }


class BOOL3 {
   public:

      BOOL3 (
         BOOL3_VALUE value = BOOL3_Unknown      
         ) : m_value(static_cast<signed char>(value)) { }

      BOOL3 (
         bool value                             
         ) : m_value(value ? 1 : 0) { }

      BOOL3& operator= (
         BOOL3_VALUE value                      
         ) { m_value = static_cast<signed char>(value); return (*this); }

      BOOL3& operator= (
         bool value                             
         ) { m_value = (value ? 1 : 0); return (*this); }

      operator BOOL3_VALUE (
         ) const { return (static_cast<BOOL3_VALUE>(m_value)); }

   private:
      #ifndef GENERATING_DOXYGEN_OUTPUT
      signed char m_value;
      #endif
   };

#endif   // INC_MI32_BOOL3_H

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