https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101527
--- Comment #3 from 康桓瑋 <hewillk at gmail dot com> ---
(In reply to Jonathan Wakely from comment #2)
> I find it surprising, but the CWG consensus seems to be that a friend
> defined inline in the class body is "a member declaration of the befriended
> class".
Hey Jonathan, I just found out that std::counted_iterator also has the same
friend access issue.
#include <iterator>
int main() {
std::counted_iterator<int*> it1;
std::counted_iterator<const int*> it2;
return it1 == it2;
}
https://godbolt.org/z/jGT5jhbWz
