https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78829
--- Comment #1 from joseph at codesourcery dot com <joseph at codesourcery dot com> --- Note that some of these (e.g. VLAs) are extensions in C++ as well. And some include features beyond the standard ones (e.g. _Complex is standard C99, but the syntax for complex constants, and __real__ and __imag__ (which are also lvalues) and ~ for complex conjugation, are all extensions, so still need documenting as such).
