In gcc/objc/: 2010-12-28 Nicola Pero <nicola.pero@meta-innovation.com>

In gcc/objc/:
2010-12-28  Nicola Pero  <nicola.pero@meta-innovation.com>

	* objc-act.c (objc_start_category_interface): Produce an error if
	a class extension is found after the class @implementation.

In gcc/testsuite/:
2010-12-28  Nicola Pero  <nicola.pero@meta-innovation.com>

	* objc.dg/class-extension-4.m: New.
	* obj-c++.dg/class-extension-4.mm: New.

From-SVN: r168294

gcc/objc/ChangeLog

 2010-12-28  Nicola Pero  <nicola.pero@meta-innovation.com>
 
+	* objc-act.c (objc_start_category_interface): Produce an error if
+	a class extension is found after the class @implementation.
+
+2010-12-28  Nicola Pero  <nicola.pero@meta-innovation.com>
+
 	PR objc/47073
 	* objc-act.c (encode_method_prototype): Fixed both location and
 	format string of error "type %qT does not have a known size".

gcc/objc/objc-act.c

@@ -763,6 +763,23 @@ objc_start_category_interface (tree klass, tree categ,
     {
       if (flag_objc1_only)
 	error_at (input_location, "class extensions are not available in Objective-C 1.0");
+      else
+	{
+	  /* Iterate over all the classes and categories implemented
+	     up to now in this compilation unit.  */
+	  struct imp_entry *t;
+
+	  for (t = imp_list; t; t = t->next)
+	    {
+	      /* If we find a class @implementation with the same name
+		 as the one we are extending, produce an error.  */
+	    if (TREE_CODE (t->imp_context) == CLASS_IMPLEMENTATION_TYPE
+		&& IDENTIFIER_POINTER (CLASS_NAME (t->imp_context)) == IDENTIFIER_POINTER (klass))
+	      error_at (input_location, 
+			"class extension for class %qE declared after its %<@implementation%>",
+			klass);
+	    }
+	}
     }
   objc_interface_context
     = start_class (CATEGORY_INTERFACE_TYPE, klass, categ, protos, NULL_TREE);

gcc/testsuite/ChangeLog

 2010-12-28  Nicola Pero  <nicola.pero@meta-innovation.com>
 
+	* objc.dg/class-extension-4.m: New.
+	* obj-c++.dg/class-extension-4.mm: New.
+
+2010-12-28  Nicola Pero  <nicola.pero@meta-innovation.com>
+
 	PR objc/47073
 	* objc.dg/incomplete-type-1.m: New test.
 

gcc/testsuite/obj-c++.dg/class-extension-4.mm

+/* Contributed by Nicola Pero <nicola.pero@meta-innovation.com>, December 2010.  */
+/* { dg-do compile } */
+
+/* This test tests you can not declare a class extension after the class @implementation.  */
+
+#include <objc/objc.h>
+
+@interface MyObject
+{
+  Class isa;
+}
+@end
+
+@implementation MyObject
+@end
+
+@interface MyObject () /* { dg-error "class extension for class .MyObject. declared after its ..implementation." } */
+- (void) test;
+@end

gcc/testsuite/objc.dg/class-extension-4.m

+/* Contributed by Nicola Pero <nicola.pero@meta-innovation.com>, December 2010.  */
+/* { dg-do compile } */
+
+/* This test tests you can not declare a class extension after the class @implementation.  */
+
+#include <objc/objc.h>
+
+@interface MyObject
+{
+  Class isa;
+}
+@end
+
+@implementation MyObject
+@end
+
+@interface MyObject ()
+- (void) test; /* { dg-error "class extension for class .MyObject. declared after its ..implementation." } */
+@end