https://gcc.gnu.org/bugzilla/show_bug.cgi?id=120305
--- Comment #13 from aneris <aneris at disroot dot org> --- (In reply to Jonathan Wakely from comment #12) > tl;dr if you want to compile with strict -std=c++20 -pedantic settings, you > need to strictly follow the rules of the standard. I understand, though, at the very least, couldn't this be made a warning for -pedantic? I think that would be immensely useful. On another note, this code does compile with Clang. Apparently godbolt defaults to libstdc++ for clang instead of libc++ and that caused all the confusion. Here: https://godbolt.org/z/j6fYMdjeo I did some digging and this is because std::is_integral_v<__int128_t> is unconditionally true in libc++, unlike in libstdc++ where it's only true when the GNU extensions are enabled. So I was wondering, is it really out of the question to promote __int128_t to an integer type by default like Clang? It'd make some code more compatible.
