https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86015
--- Comment #6 from Josh Marshall <joshua.r.marshall.1991 at gmail dot com> --- There is a kind of legacy manual specification, and a reason for that was for tracking usage. What I'm working on is adapted from David Musser's 1997 code which was using proposed and developmental stdlib code. So this functionality was intended at one point, and there is some limited use in the greater functionality.
