https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108260
--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> --- (In reply to rhalbersma from comment #0) > I'm a happy user of std::views::zip in gcc-latest but AFAICS the feature > test macro __cpp_lib_ranges_zip is not yet defined, neither in <ranges>, > <tuple>, <utility>, nor in <version>. This makes it hard #ifdedf my code on > this feature. I'm not sure if the feature is actually complete yet. It wasn't all done in a single patch. > Just for my curiosity: is it generally the case that feature test macros are > being added along with the feature completeness? Or should I condition my > mixed C++20/C++23 code in another way? This should be pretty obvious from looking at <version>. GCC has always led the way in defining feature test macros.
