re PR c++/61327 (Problem with friend template object)

2019-04-04  Paolo Carlini  <paolo.carlini@oracle.com>

	PR c++/61327
	* g++.dg/cpp0x/friend4.C: New.
	* g++.dg/cpp0x/friend5.C: Likewise.

From-SVN: r270145

gcc/testsuite/ChangeLog

 2019-04-04  Paolo Carlini  <paolo.carlini@oracle.com>
 
+	PR c++/61327
+	* g++.dg/cpp0x/friend4.C: New.
+	* g++.dg/cpp0x/friend5.C: Likewise.
+
+2019-04-04  Paolo Carlini  <paolo.carlini@oracle.com>
+
 	PR c++/56643
 	* g++.dg/cpp0x/noexcept40.C: New.
 

gcc/testsuite/g++.dg/cpp0x/friend4.C

+// PR c++/61327
+// { dg-do compile { target c++11 } }
+
+template<typename... T>
+struct A;
+
+template<typename T>
+struct A<T>
+{
+  template<typename U>
+  void f(U* u) {
+    u->T::g();
+  }
+};
+
+struct B {
+protected:
+  void g() { }
+};
+
+struct C : B {
+  template<typename...> friend struct A;
+};
+
+int main()
+{
+  C c;
+  A<B> a;
+  a.f(&c);
+}

gcc/testsuite/g++.dg/cpp0x/friend5.C

+// PR c++/61327
+// { dg-do compile { target c++11 } }
+
+class B {
+protected:
+  void f() {}
+};
+
+template <typename...>
+struct S;
+
+template <typename R>
+struct S<R>{
+    template <typename T>
+    static void caller(T *p) {p->B::f();}
+};
+
+class Q : B{
+template <typename...> friend struct S;
+};
+
+int main(){
+    Q q;
+    S<int>::caller(&q);
+    return 0;
+}