re PR c++/54325 (C++11 uniform initialization syntax for argument-less abstract…

re PR c++/54325 (C++11 uniform initialization syntax for argument-less abstract base class constructor fails)

	PR c++/54325
	* call.c (build_new_method_call_1): Don't use build_value_init for
	user-provided default constructors.

From-SVN: r194820

gcc/cp/ChangeLog

 2013-01-02  Jason Merrill  <jason@redhat.com>
 
+	PR c++/54325
+	* call.c (build_new_method_call_1): Don't use build_value_init for
+	user-provided default constructors.
+
 	* decl.c (check_default_argument): Use LOOKUP_IMPLICIT.
 
 	PR c++/55032

gcc/cp/call.c

@@ -7534,6 +7534,9 @@ build_new_method_call_1 (tree instance, tree fns, vec<tree, va_gc> **args,
 	 build_special_member_call.  */
       if (CONSTRUCTOR_NELTS (init_list) == 0
 	  && TYPE_HAS_DEFAULT_CONSTRUCTOR (basetype)
+	  /* For a user-provided default constructor, use the normal
+	     mechanisms so that protected access works.  */
+	  && !type_has_user_provided_default_constructor (basetype)
 	  && !processing_template_decl)
 	init = build_value_init (basetype, complain);
 

gcc/testsuite/g++.dg/cpp0x/initlist-protected.C

+// PR c++/54325
+// { dg-options -std=c++11 }
+
+class base
+{
+    protected:
+        base()
+        {}
+};
+
+class derived : public base
+{
+    public:
+        derived()
+            : base{} // <-- Note the c++11 curly brace syntax
+        {}
+};
+
+int main()
+{
+    derived d1;
+    return 0;
+}