How to check if enum value is valid?

Question

I am reading an enum value from a binary file and would like to check if the value is really part of the enum values. How can I do it?

Answer 1

The only way I ever found to make it 'easy', was to create (macro) a sorted array of the enums and checking with that.

The switch trick fail with enums because an enum may have more than one enumerator with a given value.

It's an annoying issue, really.