gcc/testsuite/gcc.dg/c23-attr-fallthrough-4.c

   1 /* Test C23 fallthrough attribute: duplicates (allowed after N2557).  */
   2 /* { dg-do compile } */
   3 /* { dg-options "-std=c23 -pedantic-errors" } */
   4
   5 int
   6 f (int a)
   7 {
   8   switch (a)
   9     {
  10     case 1:
  11       a++;
  12       [[fallthrough, __fallthrough__]]; /* { dg-warning "specified multiple times" } */
  13     case 2:
  14       a++;
  15       [[fallthrough]] [[fallthrough]]; /* { dg-warning "specified multiple times" } */
  16     case 3:
  17       a++;
  18     }
  19   return a;
  20 }