objc-act.c (adjust_type_for_id_default): Do not allow an object as parameter.

      * objc/objc-act.c (adjust_type_for_id_default): Do not allow an
        object as parameter. Prevent something like 'NSObject' to be
        used as the type for a method argument.

      testsuite:
      * objc.dg/param-1.m: New test.

From-SVN: r55197

gcc/ChangeLog

+
+2002-07-02 Devang Patel <dpatel@apple.com
+	* objc/objc-act.c (adjust_type_for_id_default): Do not allow an
+	  object as parameter. Prevent something like 'NSObject' to be
+	  used as the type for a method argument.
+
 2002-07-03  Neil Booth  <neil@daikokuya.co.uk>
 
 	* cpptrad.c: Update comment.

gcc/objc/objc-act.c

@@ -4465,6 +4465,10 @@ adjust_type_for_id_default (type)
        chain;
        chain = TREE_CHAIN (chain))
     {
+      if (TREE_CODE (TREE_VALUE (chain)) == RECORD_TYPE
+          && !(TREE_VALUE (type) 
+               && TREE_CODE (TREE_VALUE (type)) == INDIRECT_REF))
+        error ("can not use an object as parameter to a method\n");
       if (!is_objc_type_qualifier (TREE_VALUE (chain)))
 	return type;
     }

gcc/testsuite/ChangeLog

+2002-07-02 Devang Patel <dpatel@apple.com>
+	* objc.dg/param-1.m: New test.
+
 2002-07-03  Neil Booth  <neil@daikokuya.co.uk>
 
 	* gcc.dg/cpp/trad/directive.c: Add test.

gcc/testsuite/objc.dg/param-1.m

+/* Test if compiler detects object as an parameter to a method
+   or not. It is not valid.  */
+/* { dg-do compile } */
+
+@interface foo
+@end
+
+@implementation foo
+@end
+
+@interface bar
+-(void) my_method:(foo) my_param; /* { dg-error "can not use an object as parameter to a method" } */
+@end
+
+@implementation bar
+-(void) my_method:(foo) my_param /* { dg-error "can not use an object as parameter to a method" } */
+{
+}
+@end
+