On 04.04.22 13:39, Jonathan Wakely wrote:
> Nice, thanks. I'll get this committed in time for GCC 12 (and backport
> it to release branches too).

I've attached a rebased patch for trunk and tested it on x86_64-linux.
I also backported it for the release branches, gcc-11 tests also pass, 
on gcc-10 the prettyprinters testsuite reports "unsupported", and gcc-9 
didn't have std::span yet.