@@ -984,6 +984,10 @@ maybe_process_partial_specialization (tree type)
if (CLASS_TYPE_P (type) && CLASSTYPE_LAMBDA_EXPR (type))
return type;
+ /* An injected-class-name is not a specialization. */
+ if (DECL_SELF_REFERENCE_P (TYPE_NAME (type)))
+ return type;
+
if (TREE_CODE (type) == BOUND_TEMPLATE_TEMPLATE_PARM)
{
error ("name of class shadows template template parameter %qD",
new file mode 100644
@@ -0,0 +1,9 @@
+// PR c++/52625
+
+template<class>
+class base {};
+
+class derived : public base<derived>
+{
+ template<class> friend class base;
+};