gcc/testsuite/gcc.dg/c99-bool-3.c

   1 /* Test for _Bool bit-fields.  They have the semantics of _Bool, at
   2    least for now (DR#335 Spring 2007 discussion).  */
   3 /* Origin: Joseph Myers <joseph@codesourcery.com> */
   4 /* { dg-do run } */
   5 /* { dg-options "-std=iso9899:1999 -pedantic-errors" } */
   6 struct foo
   7 {
   8   _Bool a : 1;
   9 } sf;
  10
  11 extern void abort (void);
  12 extern void exit (int);
  13
  14 int
  15 main (void)
  16 {
  17   int i;
  18   for (i = 0; i < sizeof (struct foo); i++)
  19     *((unsigned char *)&sf + i) = (unsigned char) -1;
  20   sf.a = 2;
  21   if (sf.a != 1)
  22     abort ();
  23   sf.a = 0;
  24   if (sf.a != 0)
  25     abort ();
  26   sf.a = 0.2;
  27   if (sf.a != 1)
  28     abort ();
  29   sf.a = &sf;
  30   if (sf.a != 1)
  31     abort ();
  32   exit (0);
  33 }