https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100285
--- 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:8aadb4fedb17e7a44583a7a5a4e96b1874e1ce98 commit r12-152-g8aadb4fedb17e7a44583a7a5a4e96b1874e1ce98 Author: Jonathan Wakely <jwak...@redhat.com> Date: Tue Apr 27 11:07:47 2021 +0100 libstdc++: Define net::socket_base::message_flags operators as friends [PR 100285] The overloaded operators for socket_base::message_flags should only be defined when the message_flags type itself is defined. Rather than duplicate the preprocessor conditional, this moves the operators into the same scope as the type, defining them as hidden friends. As well as fixing the bug, this has all the usual advantages of hidden friends (they are not visible to normal name lookup for unrelated types). For consistency, do the same for the resolver_base::flags bitmask operators too. libstdc++-v3/ChangeLog: PR libstdc++/100285 * include/experimental/internet (resolver_base::flags): Define overloaded operators as hidden friends. * include/experimental/socket (socket_base::message_flags): Likewise.
