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Troolean.h
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Troolean.h
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#pragma once
//
// FILE: Troolean.h
// AUTHOR: Rob Tillaart
// VERSION: 0.1.8
// PURPOSE: Arduino Library for a three state logic data type supporting {true false unknown}
// URL: https://github.com/RobTillaart/Troolean
// https://en.wikipedia.org/wiki/Three-valued_logic
// Kleene and Priest logics
#include "Arduino.h"
#include "Printable.h"
#define TROOLEAN_LIB_VERSION (F("0.1.8"))
// VALUE MEANING
// 0 = false
// -1 = unknown
// other = true
#define unknown -1
class Troolean: public Printable
{
public:
Troolean();
Troolean(const int8_t); // 0 = false, -1 = unknown anything else = true
Troolean(const Troolean&);
// PRINTING
size_t printTo(Print&) const;
// EQUALITIES
bool operator == (const Troolean&);
bool operator == (const bool&);
bool operator == (const int&);
bool operator != (const Troolean&);
bool operator != (const bool&);
bool operator != (const int&);
operator bool() const;
// NEGATE
Troolean operator ! (); // not, negate
// LOGICAL OPERATORS
Troolean operator && (const Troolean&);
Troolean operator && (const bool&);
Troolean operator || (const Troolean&);
Troolean operator || (const bool&);
bool isTrue();
bool isFalse();
bool isUnknown();
private:
int8_t _value;
};
// -- END OF FILE --