re PR c++/51148 ([C++0x] Unexpanded template param packs wrongly accepted in friend class declarations)

PR c++/51148
	* friend.c (make_friend_class): Call check_for_bare_parameter_packs.

From-SVN: r186495

gcc/cp/ChangeLog

@@ -1,3 +1,8 @@
+2012-04-16  Jason Merrill  <jason@redhat.com>
+
+	PR c++/51148
+	* friend.c (make_friend_class): Call check_for_bare_parameter_packs.
+
 2012-04-16  Jan Hubicka  <jh@suse.cz>
 
 	* decl2.c (collect_candidates_for_java_method_alias): Use FOR_EACH

gcc/cp/friend.c

@@ -239,6 +239,9 @@ make_friend_class (tree type, tree friend_type, bool complain)
 
   friend_type = cv_unqualified (friend_type);
 
+  if (check_for_bare_parameter_packs (friend_type))
+    return;
+
   if (friend_depth)
     /* If the TYPE is a template then it makes sense for it to be
        friends with itself; this means that each instantiation is

gcc/testsuite/ChangeLog

@@ -1,3 +1,8 @@
+2012-04-16  Jason Merrill  <jason@redhat.com>
+
+	PR c++/51148
+	* g++.dg/cpp0x/variadic127.C: New.
+
 2012-04-16  Rainer Orth  <ro@CeBiTec.Uni-Bielefeld.DE>
 
 	* lib/plugin-support.exp (plugin-test-execute): Properly determine

gcc/testsuite/g++.dg/cpp0x/variadic127.C

@@ -0,0 +1,15 @@
+// PR c++/51148
+// { dg-do compile { target c++11 } }
+
+template<typename... Types>
+struct S
+{};
+
+template<typename... Types>
+struct T
+{
+  friend class S<Types>;     // { dg-error "parameter packs not expanded" }
+};
+
+int main()
+{}