re PR c++/49042 ([C++0x] wrong "protected" when using template and decltype)

	PR c++/49042
	* pt.c (get_mostly_instantiated_function_type): Use
	push_deferring_access_checks rather than set flag_access_control.

From-SVN: r174151

gcc/cp/ChangeLog

+2011-05-24  Jason Merrill  <jason@redhat.com>
+
+	PR c++/49042
+	* pt.c (get_mostly_instantiated_function_type): Use
+	push_deferring_access_checks rather than set flag_access_control.
+
 2011-05-24  Nicola Pero  <nicola.pero@meta-innovation.com>,
 
 	* parser.c (cp_parser_objc_class_ivars): Deal gracefully with a

gcc/cp/pt.c

@@ -18045,7 +18045,7 @@ get_mostly_instantiated_function_type (tree decl)
     ;
   else
     {
-      int i, save_access_control;
+      int i;
       tree partial_args;
 
       /* Replace the innermost level of the TARGS with NULL_TREEs to
@@ -18060,8 +18060,7 @@ get_mostly_instantiated_function_type (tree decl)
 
       /* Disable access control as this function is used only during
 	 name-mangling.  */
-      save_access_control = flag_access_control;
-      flag_access_control = 0;
+      push_deferring_access_checks (dk_no_check);
 
       ++processing_template_decl;
       /* Now, do the (partial) substitution to figure out the
@@ -18076,7 +18075,7 @@ get_mostly_instantiated_function_type (tree decl)
       TREE_VEC_LENGTH (partial_args)--;
       tparms = tsubst_template_parms (tparms, partial_args, tf_error);
 
-      flag_access_control = save_access_control;
+      pop_deferring_access_checks ();
     }
 
   return fn_type;

gcc/testsuite/ChangeLog

+2011-05-24  Jason Merrill  <jason@redhat.com>
+
+	* g++.dg/cpp0x/access01.C: New.
+
 2011-05-24  Nicola Pero  <nicola.pero@meta-innovation.com>
 
 	PR libobjc/48177

gcc/testsuite/g++.dg/cpp0x/access01.C

+// PR c++/49042
+// { dg-options -std=c++0x }
+
+template <class T>
+class A
+{
+  T p;
+public:
+  template <class U> auto f() -> decltype(+p) { }
+};
+
+int main()
+{
+  A<int>().f<int>();
+}