On Mon, 10 Jun 2019 at 02:53, Ed Smith-Rowland <3dw4rd@verizon.net> wrote: > Darn it, I had those constexpr lib patches in tree. > Attached are what I just committed to gcc-9 and passes there. Those > std::copy didn't really add anything anyway. They added a test that *i++ = *j++ works, and that i != j works.