gcc/testsuite/objc.dg/ivar-scope-4.m

   1 /* Test instance variable scope.  */
   2 /* Author: Dimitris Papavasiliou <dpapavas@gmail.com>.  */
   3 /* { dg-do run } */
   4 /* { dg-additional-options "-Wno-shadow-ivar -fno-local-ivars" } */
   5 #include "../objc-obj-c++-shared/runtime.h"
   6 #include <objc/objc.h>
   7
   8 extern void abort(void);
   9
  10 int someivar = 1;
  11
  12 /* The testsuite object depends on local variable scope so we need to
  13    implement our own minimal base object here. */
  14
  15 @interface MyClass
  16 {
  17   Class isa;
  18   int someivar;
  19 }
  20
  21 + (id) alloc;
  22 - (id) init;
  23 - (int) getGlobal;
  24 - (int) getInstance;
  25 - (int) getHidden;
  26 @end
  27
  28 @implementation MyClass
  29 + (id) alloc
  30 {
  31   return class_createInstance (self, 0);
  32 }
  33
  34 - (id) init
  35 {
  36   self->someivar = 2;
  37
  38   return self;
  39 }
  40
  41 - (int) getGlobal
  42 {
  43   return someivar;
  44 }
  45
  46 - (int) getInstance
  47 {
  48   return self->someivar;
  49 }
  50
  51 - (int) getHidden
  52 {
  53   int someivar = 3;
  54
  55   return someivar;
  56 }
  57 @end
  58
  59 int main(void)
  60 {
  61   id object;
  62
  63   object = [[MyClass alloc] init];
  64
  65   /* Check for aliasing between instance variable and global
  66      variable. */
  67
  68   if ([object getGlobal] != 1) {
  69     abort();
  70   }
  71
  72   if ([object getInstance] != 2) {
  73     abort();
  74   }
  75
  76   /* Check whether the local variable hides the instance variable. */
  77
  78   if ([object getHidden] != 3) {
  79     abort();
  80   }
  81
  82   return 0;
  83 }