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https://github.com/RobTillaart/Arduino.git
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67 lines
1.3 KiB
C++
67 lines
1.3 KiB
C++
#pragma once
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//
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// FILE: Troolean.h
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// AUTHOR: Rob Tillaart
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// VERSION: 0.1.7
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// PURPOSE: Arduino Library for a three state logic datatype supporting {true false unknown}
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// URL: https://github.com/RobTillaart/Troolean
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// https://en.wikipedia.org/wiki/Three-valued_logic
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// Kleene and Priest logics
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#include "Arduino.h"
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#include "Printable.h"
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#define TROOLEAN_LIB_VERSION (F("0.1.7"))
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// VALUE MEANING
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// 0 = false
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// -1 = unknown
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// other = true
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#define unknown -1
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class Troolean: public Printable
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{
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public:
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Troolean();
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Troolean(const int8_t); // 0 = false, -1 = unknown anything else = true
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Troolean(const Troolean&);
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// PRINTING
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size_t printTo(Print&) const;
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// EQUALITIES
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bool operator == (const Troolean&);
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bool operator == (const bool&);
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bool operator == (const int&);
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bool operator != (const Troolean&);
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bool operator != (const bool&);
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bool operator != (const int&);
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operator bool() const;
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// NEGATE
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Troolean operator ! (); // not, negate
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// LOGICAL OPERATORS
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Troolean operator && (const Troolean&);
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Troolean operator && (const bool&);
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Troolean operator || (const Troolean&);
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Troolean operator || (const bool&);
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bool isTrue();
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bool isFalse();
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bool isUnknown();
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private:
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int8_t _value;
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};
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// -- END OF FILE --
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