gcc/testsuite/gcc.dg/c23-auto-2.c

   1 /* Test C23 auto.  Valid code, execution tests.  Based on auto-type-1.c.  */
   2 /* { dg-do run } */
   3 /* { dg-options "-std=c23 -pedantic-errors" } */
   4 /* { dg-require-effective-target alloca } */
   5
   6 extern void abort (void);
   7 extern void exit (int);
   8
   9 auto i = 1;
  10 extern int i;
  11 auto c = (char) 1;
  12 extern char c;
  13 static auto u = 10U;
  14 extern unsigned int u;
  15 const auto ll = 1LL;
  16 extern const long long ll;
  17
  18 int
  19 main (void)
  20 {
  21   if (i != 1 || c != 1 || u != 10U)
  22     abort ();
  23   auto ai = i;
  24   int *aip = &ai;
  25   if (ai != 1)
  26     abort ();
  27   auto p = (int (*) [++i]) 0;
  28   if (i != 2)
  29     abort ();
  30   if (sizeof (*p) != 2 * sizeof (int))
  31     abort ();
  32   int vla[u][u];
  33   int (*vp)[u] = &vla[0];
  34   auto vpp = ++vp;
  35   if (vp != &vla[1])
  36     abort ();
  37   exit (0);
  38 }