Base enum class inheritance


Question

Is there a pattern where I can inherit enum from another enum in C++??

Something like that:

enum eBase 
{
   one=1, two, three
};


enum eDerived: public eBase
{
   four=4, five, six
};
1
71
11/9/2018 5:35:40 PM

Accepted Answer

Not possible. There is no inheritance with enums.

You can instead use classes with named const ints.

Example:

class Colors
{
public:
  static const int RED = 1;
  static const int GREEN = 2;
};

class RGB : public Colors
{
  static const int BLUE = 10;
};


class FourColors : public Colors
{
public:
  static const int ORANGE = 100;
  static const int PURPLE = 101;
};
59
3/13/2009 9:23:16 PM

#include <iostream>
#include <ostream>

class Enum
{
public:
    enum
    {
        One = 1,
        Two,
        Last
    };
};

class EnumDeriv : public Enum
{
public:
    enum
    {
        Three = Enum::Last,
        Four,
        Five
    };
};

int main()
{
    std::cout << EnumDeriv::One << std::endl;
    std::cout << EnumDeriv::Four << std::endl;
    return 0;
}

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