enumAsBitmask.h

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#ifndef __enumAsBitmask_h_
#define __enumAsBitmask_h_
#include<type_traits>
 
template <typename T> class enumAsBitmask {
    typename std::underlying_type<T>::type bits;
  public:
    typedef T enumType;
    enumAsBitmask() :
        bits(0) {
    }
    enumAsBitmask(const T& aBits) :
        bits(static_cast<decltype(bits)>(aBits)) {
    }
    typename std::underlying_type<T>::type asBits() const {
        return bits;
    }
    enumAsBitmask operator&(const T& aBits) const {
        enumAsBitmask state;
        state.bits = this->bits & static_cast<decltype(bits)>(aBits);
        return state;
    }
    enumAsBitmask operator|(const enumAsBitmask& rhs) {
        bits |= rhs.bits;
        return *this;
    }
    enumAsBitmask operator|=(const T& aBits) {
        this->bits |= static_cast<decltype(bits)>(aBits);
        return *this;
    }
    void clear(const T aBits) {
        this->bits &= ~static_cast<decltype(bits)>(aBits);
    }
    void set(const T aBits) {
        this->bits |= static_cast<decltype(bits)>(aBits);
    }
    operator bool() const {
        return this->bits  != 0;
    }
};
 
#endif