http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51437
--- Comment #13 from Josh Triplett <josh at joshtriplett dot org> 2012-02-19 18:56:28 UTC --- (In reply to comment #11) > (In reply to comment #10) > > (In reply to comment #9) > > > (Some of the other reserved identifier categories, such as E[A-Z0-9].*, > > > is[a-z].*, to[a-z].*, and mem[a-z].* should go under some separate, more > > > pedantic warning option.) > > > > I don't see why this should happen at all. There's nothing special about > > these > > general names? > > See comment #3, they are reserved in C99 ยง7.26 "Future library directions" > (although those patterns aren't quite right). I wrote those patterns based on C11 section 7.30 "Future library directions". 7.30.3 says "Macros that begin with E and a digit or E and an uppercase letter may be added to the declarations in the <errno.h> header.". 7.30.2 says "Function names that begin with either is or to, and a lowercase letter may be added to the declarations in the <ctype.h> header."; 7.30.12 also reserves those two for <wctype.h>. 7.30.11 says "Function names that begin with str, mem, or wcs and a lowercase letter may be added to the declarations in the <string.h> header." AFAICT, those reservations match the regexes I gave.
