https://gcc.gnu.org/bugzilla/show_bug.cgi?id=51437
Jonathan Wakely <redi at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |redi at gcc dot gnu.org --- Comment #17 from Jonathan Wakely <redi at gcc dot gnu.org> --- (In reply to Josh Triplett from comment #5) > I'd like to see this as well. While issuing such a warning by default would > cause numerous warnings with existing code, having it as an opt-in > -Wreserved-identifiers would help greatly. Clang does this now, with -Wreserved-identifier (N.B. singular, not "identifiers") > Also, the rules for C prohibit a leading underscore followed by a capital > letter, or two adjacent underscores *anywhere* in the identifier. So, for > example, this__identifier, or_this_identifier__. No, that's only in C++. C allows two adjacent underscores anywhere except the start. C++ does not.