Extending enums in C++?

Question

Is there a way in C++ to extend/\"inherit\" enums?

I.E:

enum Enum {A,B,C};
enum EnumEx : public Enum {D,E,F};

or at least define a

Answer 1

I do this '

'''
    enum OPC_t // frame Operation Codes
    {
      OPC_CVSND = 0 // Send CV value
    , OPC_CVREQ = 1 // Request CV (only valid for master app)
    , OPC_COMND = 2 // Command
    , OPC_HRTBT = 3 // Heart Beat
    };
    enum rxStatus_t     // this extends OPC_t
    {
      RX_CVSND = OPC_CVSND  // Send CV value
    , RX_CVREQ = OPC_CVREQ  // Request CV
    , RX_COMND = OPC_COMND  // Command
    , RX_HRTBT = OPC_HRTBT  // Heart Beat
    , RX_NONE       // No new Rx
    , RX_NEWCHIP        // new chip detected
    };
''''