On Sun, 8 Nov 2020, 03:20 Ming Cheng via Gcc-help, <gcc-help@gcc.gnu.org> wrote: > Hi, > > starting from which version, g++ will support > std::from_chars/std::to_chars . Now seems g++ (GCC) 7.3.1 20180303 does not > support it. > GCC 11 will support it.