Why should I prefer static constexpr int in a class over enum for class-level integral constants?

Question

C++17 Update: static constexpr variables are implicitly inline so there\'s no external definition necessary.

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Original qu

Answer 1

One difference is that you can take the address of a static constexpr but not of an enum.

Another is that constexpr isn't supported by older versions of the language (it was introduced in C++11).

I'd use enum only if the values belong together. I'd also give the enum a name that describes that relationship. I wouldn't use an enum for defining unrelated constants.