tristate.h

// Description: Fuzzy 3-state logic

#ifndef PASTELSYS_TRISTATE_H
#define PASTELSYS_TRISTATE_H

namespace Pastel
{

    //! A triple state variable.
    enum class TriState : integer
    {
        False = 0,
        Negative = 0,
        True = 1,
        Positive = 1,
        Maybe = 2,
        Both = 2,
        Neither = 2,
        Zero = 2
    };

    void swap(TriState& left, TriState& right);

    TriState triNot(TriState that);
    TriState triMix(TriState left, TriState right);
    TriState triEqual(TriState left, TriState right);
    TriState triNotEqual(TriState left, TriState right);
    TriState triAnd(TriState left, TriState right);
    TriState triOr(TriState left, TriState right);
    TriState triXor(TriState left, TriState right);

    template <typename Type>
    TriState triLess(
        const Type& left, const Type& right);

}

#include "pastel/sys/tristate/tristate.hpp"

#endif