===================================================================
@@ -1864,13 +1864,19 @@ defaultable_fn_check (tree fn)
}
else
{
- tree t = FUNCTION_FIRST_USER_PARMTYPE (fn);
- for (; t && t != void_list_node; t = TREE_CHAIN (t))
+ for (tree t = FUNCTION_FIRST_USER_PARMTYPE (fn);
+ t && t != void_list_node; t = TREE_CHAIN (t))
if (TREE_PURPOSE (t))
{
error ("defaulted function %q+D with default argument", fn);
break;
}
+
+ /* Avoid do_warn_unused_parameter warnings. */
+ for (tree p = FUNCTION_FIRST_USER_PARM (fn); p; p = DECL_CHAIN (p))
+ if (DECL_NAME (p))
+ TREE_NO_WARNING (p) = 1;
+
if (TYPE_BEING_DEFINED (DECL_CONTEXT (fn)))
/* Defer checking. */;
else if (!processing_template_decl)
===================================================================
@@ -0,0 +1,23 @@
+// PR c++/57211
+// { dg-options "-std=c++11 -Wunused-parameter" }
+
+template <class T> T&& move(T&);
+
+struct A
+{
+ struct B
+ {
+ B& operator=(B&&);
+ };
+
+ B f;
+
+ A& operator=(A&& p) = default;
+};
+
+int main()
+{
+ A a;
+ A b;
+ b = move(a);
+}