gnu/dist/gcc4/gcc/testsuite/objc.dg/defs.m

   1 /* Check if the @defs() construct preserves the correct
   2    offsets of ivars.  */
   3 /* Contributed by Ziemowit Laski <zlaski@apple.com>.  */
   4 /* { dg-options "-lobjc" } */
   5 /* { dg-do run } */
   6
   7 #include <objc/objc.h>
   8 #include <objc/Object.h>
   9
  10 extern void abort(void);
  11
  12 #define CHECK_IF(expr) if(!(expr)) abort();
  13
  14 @interface Base: Object {
  15 @public
  16   int a;
  17   float b;
  18   char c;
  19 }
  20 @end
  21
  22 @interface Derived: Base {
  23 @public
  24   double d;
  25   unsigned e;
  26   id f;
  27 }
  28 - init;
  29 @end
  30
  31 struct Derived_defs {
  32   @defs(Derived);
  33 };
  34
  35 @implementation Base
  36 @end
  37 @implementation Derived
  38 - init {
  39   [super init];
  40   a = 123;
  41   b = 1.23;
  42   c = 'c';
  43   d = 123.456;
  44   e = 456;
  45   f = isa;
  46   return self;
  47 }
  48 @end
  49
  50 int main(void) {
  51   Derived *derived = [[Derived alloc] init];
  52   struct Derived_defs *derived_defs = (struct Derived_defs *)derived;
  53
  54   CHECK_IF(derived->a == derived_defs->a && derived_defs->a == 123);
  55   CHECK_IF(derived->b == derived_defs->b && derived_defs->b == (float)1.23);
  56   CHECK_IF(derived->c == derived_defs->c && derived_defs->c == 'c');
  57   CHECK_IF(derived->d == derived_defs->d && derived_defs->d == (double)123.456);
  58   CHECK_IF(derived->e == derived_defs->e && derived_defs->e == 456);
  59   CHECK_IF(derived->f == derived_defs->f && derived_defs->f == derived_defs->isa);
  60
  61   /* Try out the "inline" notation as well.  */
  62   CHECK_IF(((struct { @defs(Derived); } *)derived)->a == 123);
  63   CHECK_IF(((struct { @defs(Derived); } *)derived)->c == 'c');
  64   CHECK_IF(((struct { @defs(Derived); } *)derived)->e == 456);
  65
  66   return 0;
  67 }