C++ enum class实现& | ^ ~等操作

最新推荐文章于 2025-12-01 19:24:00 发布

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#c++

enum class FutureState {
    ASYNC = 0x01,
    DEFERRED = 0x02,
};

inline FutureState operator&(FutureState el, FutureState er)
{
    return static_cast<FutureState>(static_cast<int>(el) & static_cast<int>(er));
}

inline FutureState operator|(FutureState el, FutureState er)
{
    return static_cast<FutureState>(static_cast<int>(el) | static_cast<int>(er));
}

inline FutureState operator^(FutureState el, FutureState er)
{
    return static_cast<FutureState>(static_cast<int>(el) ^ static_cast<int>(er));
}

inline FutureState operator~(FutureState el)
{
    return static_cast<FutureState>(~static_cast<int>(el));
}

inline FutureState& operator&=(FutureState& el, FutureState er)
{
    return el = el & er;
}

inline FutureState& operator|=(FutureState& el, FutureState er)
{
    return el = el | er;
}

inline FutureState& operator^=(FutureState& el, FutureState er)
{
    return el = el ^ er;
}

int main(int argc, char **argv)
{
    FutureState state1 = FutureState::ASYNC & FutureState::DEFERRED;
    FutureState state2 = FutureState::ASYNC | FutureState::DEFERRED;
    FutureState state3 = ~state1;
    FutureState state4 = state1 ^ state2;

    state3 &= state1;
    state4 |= state2;
    state4 ^= state2;
    return 0;
}