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(C++) Tribool

Technical facts

./CppTribool/CppTribool.pri


INCLUDEPATH += \

    ../../Classes/CppTribool



SOURCES += \

    ../../Classes/CppTribool/tribool.cpp



HEADERS  += \

    ../../Classes/CppTribool/tribool.h



OTHER_FILES += \

    ../../Classes/CppTribool/Licence.txt

./CppTribool/tribool.h


#ifndef TRIBOOL_H

#define TRIBOOL_H



#include <iosfwd>



namespace ribi {



///Class similar to Boost.Tribool,

///except that this version does not surprise me as often

enum class Tribool { True, False, Indeterminate };



std::ostream& operator<<(std::ostream& os, const Tribool tribool);



} //~namespace ribi



#endif // TRIBOOL_H

./CppTribool/tribool.cpp


#include "tribool.h"



#include <ostream>



std::ostream& ribi::operator<<(std::ostream& os, const Tribool tribool)

{



  switch (tribool)

  {

    case Tribool::False: os << '0'; break;

    case Tribool::Indeterminate: os << '?'; break;

    case Tribool::True: os << '1'; break;

  }

  return os;

}

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