https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94051
--- Comment #1 from CVS Commits <cvs-commit at gcc dot gnu.org> --- The master branch has been updated by Jonathan Wakely <r...@gcc.gnu.org>: https://gcc.gnu.org/g:6a7052832a4791047b0ff4f18dcbb55c93a7336c commit r10-7044-g6a7052832a4791047b0ff4f18dcbb55c93a7336c Author: Jonathan Wakely <jwak...@redhat.com> Date: Thu Mar 5 16:46:28 2020 +0000 libstdc++: allow string_view insertion to work with <iosfwd> (PR 94051) I don't think this is actually required to compile, because using operator<< without a definition of the ostream doesn't seem valid to me. But it's easy to make it work. PR libstdc++/94051 * include/std/string_view: Include <bits/ostream_insert.h>. * testsuite/21_strings/basic_string_view/inserters/94051.cc: New test.
