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