https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86876
Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Last reconfirmed| |2018-8-7
CC| |jason at gcc dot gnu.org,
| |marxin at gcc dot gnu.org,
| |nathan at gcc dot gnu.org
--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
Note that both clang++ and ICC reject as well:
$ clang++ pr86876.cpp -c
pr86876.cpp:12:22: error: expected a qualified name after 'typename'
friend typename X; // g++ fail
^
1 error generated.
$ source>(12): error: a class or namespace qualified name is required
friend typename X; // g++ fail
^
<source>(6): error #308: member "B<T>::a [with T=int]" (declared at line 15) is
inaccessible
void foo(U* p) { printf("p->a = %d\n", p->a); }
^
detected during instantiation of "void A<T>::X<U>::foo(U *) [with
T=int, U=B<int>]" at line 19
compilation aborted for <source> (code 2)
Compiler returned: 2
