The enum in this case could have a std::pair<int, float> as fundamental type instead. Wouldn't that be simpler and more flexible, as this class (in this case std::pair) could provide added functionality, e.g. suitable constructors. -----Ursprüngliche Nachricht----- Von:Filip <fph2137_at_[hidden]> Gesendet:Fr 14.03.2025 12:33 Betreff:Re: [std-proposals] lambdas in enums An:std-proposals_at_[hidden]; CC:Sebastian Wittmeier <wittmeier_at_[hidden]>; std-proposals_at_[hidden]; sizeof an enum is essentially a sizeof its underlying type, so it should be the sum of sizeof of each type. C and D are valid. if the compiler can ( and should ) compare them and optimize the storage, then it could be optimized. However then you would ensure that operator== is implemented for it to be used. Cheers, Filip