re PR c++/37140 (type inherited from base class not recognized)

2014-02-02  Fabien Chene  <fabien@gcc.gnu.org>
        PR c++/37140
        * parser.c (cp_parser_nonclass_name): Call strip_using_decl and
	move the code handling dependent USING_DECLs...
        * name-lookup.c (strip_using_decl): ...Here.

2014-02-02  Fabien Chene  <fabien@gcc.gnu.org>

        PR c++/37140
        * g++.dg/template/using27.C: New.
	* g++.dg/template/using28.C: New.
	* g++.dg/template/using29.C: New.

From-SVN: r207408

gcc/cp/parser.c

@@ -14812,25 +14812,7 @@ cp_parser_nonclass_name (cp_parser* parser)
   /* Look up the type-name.  */
   type_decl = cp_parser_lookup_name_simple (parser, identifier, token->location);
 
-  if (TREE_CODE (type_decl) == USING_DECL)
-    {
-      if (!DECL_DEPENDENT_P (type_decl))
-	type_decl = strip_using_decl (type_decl);
-      else if (USING_DECL_TYPENAME_P (type_decl))
-	{
-	  /* We have found a type introduced by a using
-	     declaration at class scope that refers to a dependent
-	     type.
-	     
-	     using typename :: [opt] nested-name-specifier unqualified-id ;
-	  */
-	  type_decl = make_typename_type (TREE_TYPE (type_decl),
-					  DECL_NAME (type_decl),
-					  typename_type, tf_error);
-	  if (type_decl != error_mark_node)
-	    type_decl = TYPE_NAME (type_decl);
-	}
-    }
+  type_decl = strip_using_decl (type_decl);
   
   if (TREE_CODE (type_decl) != TYPE_DECL
       && (objc_is_id (identifier) || objc_is_class_name (identifier)))

gcc/testsuite/g++.dg/template/using27.C

+// PR c++/37140
+
+struct X
+{
+  typedef int nested_type;
+};
+
+template <class T>
+struct A
+{
+  typedef X type;
+};
+
+template <class T>
+struct B : A<T>
+{
+  using typename A<T>::type;
+  typename type::nested_type x;
+};
+
+template <class T> 
+struct C : B<T>
+{
+  using typename B<T>::type;
+  typename type::nested_type y;
+};
+
+struct D : C<int>
+{
+  using C<int>::type;
+  type::nested_type z;
+};
+

gcc/testsuite/g++.dg/template/using28.C

+// PR c++/37140
+
+struct C
+{
+  static const int block_size = 1;
+};
+
+template <typename T> struct A {
+  typedef C type;
+};
+
+template <typename T> struct B : public A<T> {
+  using typename A<T>::type;
+  static const int block_size = type::block_size;
+};
+
+template class B<int>;

gcc/testsuite/g++.dg/template/using29.C

+// PR c++/58047
+
+template <int N>
+struct print_arg { };
+
+struct const_holder {
+  static const int CONSTANT = 42;
+};
+
+template <typename T>
+struct identity {
+  typedef T type;
+};
+
+template <class T>
+struct test_case : public identity<T> {
+  using typename identity<T>::type;
+  print_arg<type::CONSTANT> printer;
+};
+
+template struct test_case<const_holder>;