//Microsoft (R) C/C++ Optimizing Compiler Version 19.00.23506 for x64

​

#include <iostream>

​

namespace rang {   

​

        enum class stream { Auto = 0, Ansi = 1, Off = 2 };

        namespace rang_implementation {

            inline int internalStreamModeIndex()

            {

                static const int xindex = std::ios_base::xalloc();

                return xindex;

            }

        }

        template <typename CharT, typename Traits>

        inline void setStreamMode(std::basic_ostream<CharT, Traits> &os, stream mode)

        {

            using namespace rang_implementation;

            long &curVal = os.iword(internalStreamModeIndex());

            curVal = static_cast<long>(mode);

        }

        template <typename CharT, typename Traits>

        inline stream streamMode(std::basic_ostream<CharT, Traits> &os)

        {

            using namespace rang_implementation;

            // Default iword is 0, so it's means that Auto should be 0

            long curVal = os.iword(internalStreamModeIndex());

            return static_cast<stream>(curVal);

        }

}

​

int main()

{