gcc/testsuite/gcc.dg/c23-nullptr-6.c

   1 /* PR c/108424 */
   2 /* { dg-options "-std=c23" } */
   3
   4 struct S {
   5   int i;
   6   int : nullptr; /* { dg-error "not an integer constant" } */
   7 };
   8
   9 enum E { X = nullptr }; /* { dg-error "not an integer constant" } */
  10
  11 alignas(nullptr) int g; /* { dg-error "not an integer constant" } */
  12
  13 int arr[10] = { [nullptr] = 1 }; /* { dg-error "not of integer type" } */
  14
  15 _Static_assert (nullptr, "nullptr"); /* { dg-error "not an integer" } */
  16
  17 void f (int n)
  18 {
  19   switch (n) {
  20   case nullptr: /* { dg-error "an integer constant" } */
  21   default:
  22   }
  23
  24   switch (n) {
  25   case 1 ... nullptr: /* { dg-error "an integer constant" } */
  26   default:
  27   }
  28
  29   switch (n) {
  30   case nullptr ... 2: /* { dg-error "an integer constant" } */
  31   default:
  32   }
  33 }