gcc/testsuite/gcc.dg/c90-anon-struct-1.c

   1 /* Test for anonymous structures and unions not permitted in C90.  */
   2 /* { dg-do compile } */
   3 /* { dg-options "-std=iso9899:1990 -pedantic-errors" } */
   4
   5 struct s
   6 {
   7   int a;
   8   struct
   9   {
  10     int b;
  11   }; /* { dg-error "unnamed structs" } */
  12 };