https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92546
--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> --- Currently <span> includes the whole of <array>, but we might be able to avoid that so that <span> is more lightweight: : | g++ -std=c++2a -P -E -x c++ - -include array | wc -l 7729 : | g++ -std=c++2a -P -E -x c++ - -include span | wc -l 9528
