re PR c++/53009 (pointer to static member function of template class is…

re PR c++/53009 (pointer to static member function of template class is “invalid” as a template argument of another template class)

	PR c++/53009
	* g++.dg/cpp0x/nontype3.C: New test.

From-SVN: r274027

gcc/testsuite/ChangeLog

 2019-08-02  Marek Polacek  <polacek@redhat.com>
 
+	PR c++/53009
+	* g++.dg/cpp0x/nontype3.C: New test.
+
+2019-08-02  Marek Polacek  <polacek@redhat.com>
+
 	PR c++/77575
 	* g++.dg/cpp0x/nontype2.C: New test.
 

gcc/testsuite/g++.dg/cpp0x/nontype3.C

+// PR c++/53009
+// { dg-do compile { target c++11 } }
+
+template<typename T, T> class function_proxy;
+
+template<typename Return, typename Obj, Return(*func)(Obj)>
+struct function_proxy<Return(*)(Obj), func>
+{
+    static void wrapper(){ }
+};
+
+template<typename CT, CT> class member_helper;
+
+template<typename Class, void(Class::*fun)()>
+struct member_helper<void(Class::*)(), fun>
+{
+    static void as_free(Class& obj){ }
+
+    static void worker(){
+        (void) function_proxy<decltype(&as_free), &as_free>::wrapper;
+    }
+};
+
+struct Test
+{
+    void test(){ }
+};
+
+int main()
+{
+    member_helper<decltype(&Test::test), &Test::test>::worker();
+}