Hi, why is enum class inheritance not allowed? I have faced up a problem that I need to extend the enum class for each system. However, there is no good tool to do it in C++ as far as I know. 

Let me explain more briefly, assume that there are more than one subsystems that are using the same common base system. The common system contains such as memory, time management controllers and these controllers consist of two-part. One of them is a common one and the other one is system-dependent. I want to keep their name and id in the enum class. Although I can extend functionalities with inheritance, I cannot extend their enums. To do this, I have two options. The first one is putting the all enums same enum class or duplicate names for each sub-system. As you guess, these solutions are not good solutions to remove dependencies or duplications. As a reason for it, what about adding the inheritance for enum classes?

Maybe it can be;

enum class CommonSystem {

    T1,

    T2,

    T3,

};

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