https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79442
--- Comment #4 from Jonathan Wakely <redi at gcc dot gnu.org> --- (In reply to Ose Pedro from comment #0) > GCC 5 is supposed to provide full support for N3652, but the code below does > not compile under GCC 5.4 (it does, however, compile under GCC 6.1). It compiles fine using any 5.x release, even 5.1.0, what error do you get? You need to use -std=gnu++14 or -std=c++14, because N3652 is a C++14 feature. I don't see a problem with the C++ status page.