1 files changed, 56 insertions, 0 deletions
diff --git a/gcc/testsuite/obj-c++.dg/private-2.mm b/gcc/testsuite/obj-c++.dg/private-2.mm
new file mode 100644
index 000000000..3e6ff118d
--- /dev/null
+++ b/gcc/testsuite/obj-c++.dg/private-2.mm
@@ -0,0 +1,56 @@
+/* Test warnings for shadowing instance variables.  */
+/* Based on work by: Nicola Pero <nicola@brainstorm.co.uk>.  */
+
+/* { dg-do compile } */
+
+#include <objc/objc.h>
+
+@interface MySuperClass
+{
+@private
+  int _private;
+
+@protected
+  int _protected;
+
+@public
+  int _public;
+}
+- (void) test;
+@end
+
+@implementation MySuperClass
+- (void) test
+{
+  /* FIXME: I wonder if the warnings shouldn't be better generated
+     when the variable is declared, rather than used!  */
+  int _private = 12;
+  int _protected = 12;
+  int _public = 12;
+  int a;
+  
+  a = _private;    /* { dg-warning "hides instance variable" } */
+  a = _protected;  /* { dg-warning "hides instance variable" } */
+  a = _public;     /* { dg-warning "hides instance variable" } */
+}
+@end
+
+
+@interface MyClass : MySuperClass 
+@end
+
+@implementation MyClass
+- (void) test
+{
+  int _private = 12;
+  int _protected = 12;
+  int _public = 12;
+  int a;
+
+  /* The private variable can be shadowed without warnings, because
+   * it's invisible, and not accessible, to the subclass!  */
+  a = _private;   /* Ok  */
+  a = _protected; /* { dg-warning "hides instance variable" } */
+  a = _public;    /* { dg-warning "hides instance variable" } */
+}
+@end