gcc/testsuite/objc.dg/private-2.m

   1 /* Test warnings for shadowing instance variables.  */
   2 /* Author: Nicola Pero <nicola@brainstorm.co.uk>.  */
   3 /* { dg-do compile } */
   4 #include <objc/objc.h>
   5
   6 @interface MySuperClass
   7 {
   8 @private
   9   int private;
  10
  11 @protected
  12   int protected;
  13
  14 @public
  15   int public;
  16 }
  17 - (void) test;
  18 @end
  19
  20 @implementation MySuperClass
  21 - (void) test
  22 {
  23   /* FIXME: I wonder if the warnings shouldn't be better generated
  24      when the variable is declared, rather than used!  */
  25   int private = 12;
  26   int protected = 12;
  27   int public = 12;
  28   int a;
  29
  30   a = private;    /* { dg-warning "hides instance variable" } */
  31   a = protected;  /* { dg-warning "hides instance variable" } */
  32   a = public;     /* { dg-warning "hides instance variable" } */
  33 }
  34 @end
  35
  36
  37 @interface MyClass : MySuperClass
  38 @end
  39
  40 @implementation MyClass
  41 - (void) test
  42 {
  43   int private = 12;
  44   int protected = 12;
  45   int public = 12;
  46   int a;
  47
  48   /* The private variable can be shadowed without warnings, because
  49    * it's invisible, and not accessible, to the subclass!  */
  50   a = private;   /* Ok  */
  51   a = protected; /* { dg-warning "hides instance variable" } */
  52   a = public;    /* { dg-warning "hides instance variable" } */
  53 }
  54 @end