Function enum_bit_xor

3rdparty/cppzmq/zmq.hpp:1017–1022

    return static_cast<T>(static_cast<U>(a) & static_cast<U>(b));
}
template<class T> constexpr T enum_bit_xor(T a, T b) noexcept
{
    static_assert(std::is_enum<T>::value, "must be enum");
    using U = typename std::underlying_type<T>::type;
    return static_cast<T>(static_cast<U>(a) ^ static_cast<U>(b));
}
template<class T> constexpr T enum_bit_not(T a) noexcept
{
    static_assert(std::is_enum<T>::value, "must be enum");