https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77817
--- Comment #15 from Marc Mutz <marc.mutz at kdab dot com> --- (In reply to Jakub Jelinek from comment #13) > (In reply to Marc Mutz from comment #12) > > Is replacing a matching comment with __attribute__(fallthrough)) so > > complicated as to make this a wontfix? > > It is not really possible. > __attribute__((fallthrough)) has precise rules on where it can appear, while > /* FALLTHRU */ comments, being comments, can appear anywhere. Especially > with -Wimplicit-fallthrough=1 when all comments are considered fallthru > comments... I don't buy this. You don't need to use the 'official' attribute. You can invent an internal one, say __attribute__((__replaced_fallthrough_comment)), which does not have the limitations of [[fallthrough]]. It's just a way to preserve a comment over the preprocessor stage.
