Dear Veronica, what about your mentioned alternative of anonymous unions and structs? They could be made standard-compliant. And would need less language changes.   Would they have problems with UB due to which element is the active one? When used in your use case?   Best regards, Sebastian   -----Ursprüngliche Nachricht----- Von:veronica alphonso via Std-Proposals <std-proposals_at_[hidden]> Gesendet:Do 07.03.2024 23:55 Betreff:[std-proposals] Subscript aliasing An:std-proposals_at_[hidden]; CC:veronica alphonso <verodeving_at_[hidden]>; In C++ there isn't a standard-compliant way of creating named aliases of c-like array elements. In certain contexts, it is preferred to access these these array elements with a named identifier that is bounded to that particular array entry, e.g: union {     float my_vec[3];     struct     {         float x, y, z;     }; }; However, anonymous structs/classes are only -- Std-Proposals mailing list Std-Proposals_at_[hidden] https://lists.isocpp.org/mailman/listinfo.cgi/std-proposals