https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86747
Bug ID: 86747
Summary: [8/9 Regression] rejects-valid with redundant friend
declaration
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: mpolacek at gcc dot gnu.org
Target Milestone: ---
template <class> class A {
typedef A vector_type;
template <void (vector_type::*)()> class C;
template <void (vector_type::*)()> friend class C;
};
int main() { A<double> a; }
is rejected starting with r255780 aka PR59930 fix.
f.C: In instantiation of ‘class A<double>’:
f.C:7:24: required from here
f.C:3:35: error: template parameter ‘void (A< <template-parameter-1-1> >::*
<anonymous>)()’
template <void (vector_type::*)()> class C;
^
f.C:4:51: error: redeclared here as ‘void (A<double>::* <anonymous>)()’
template <void (vector_type::*)()> friend class C;
^
The friend declaration is redundant but we used to accept this, and so does
clang.
