Comment by tialaramex

> C++ actually did end up evolving the ability to define a zero-sized class without a unique memory address

Did it? Are you talking about the no_unique_address attribute (I had to go look that up because WG21 apparently doesn't care about consistently using or not using separators in attribute names) ? That attribute lets you do the same trick as empty base class but without the ceremony, however it doesn't let you make ZSTs.