gcc/testsuite/obj-c++.dg/private-2.mm

   1 /* Test warnings for shadowing instance variables.  */
   2 /* Based on work by: Nicola Pero <nicola@brainstorm.co.uk>.  */
   3
   4 /* { dg-do compile } */
   5
   6 #include <objc/objc.h>
   7
   8 @interface MySuperClass
   9 {
  10 @private
  11   int _private;
  12
  13 @protected
  14   int _protected;
  15
  16 @public
  17   int _public;
  18 }
  19 - (void) test;
  20 @end
  21
  22 @implementation MySuperClass
  23 - (void) test
  24 {
  25   /* FIXME: I wonder if the warnings shouldn't be better generated
  26      when the variable is declared, rather than used!  */
  27   int _private = 12;
  28   int _protected = 12;
  29   int _public = 12;
  30   int a;
  31
  32   a = _private;    /* { dg-warning "hides instance variable" } */
  33   a = _protected;  /* { dg-warning "hides instance variable" } */
  34   a = _public;     /* { dg-warning "hides instance variable" } */
  35 }
  36 @end
  37
  38
  39 @interface MyClass : MySuperClass
  40 @end
  41
  42 @implementation MyClass
  43 - (void) test
  44 {
  45   int _private = 12;
  46   int _protected = 12;
  47   int _public = 12;
  48   int a;
  49
  50   /* The private variable can be shadowed without warnings, because
  51    * it's invisible, and not accessible, to the subclass!  */
  52   a = _private;   /* Ok  */
  53   a = _protected; /* { dg-warning "hides instance variable" } */
  54   a = _public;    /* { dg-warning "hides instance variable" } */
  55 }
  56 @end