1  /* { dg-do compile } */
       2  /* { dg-options "-std=gnu99 -pedantic-errors -Wno-c99-c11-compat" } */
       3  
       4  struct S { int i; struct { int a; }; };
       5  _Noreturn void foo (void);
       6  typedef int A;
       7  typedef int A;
       8  _Thread_local int i;
       9  _Static_assert (1, "foo");
      10  _Atomic int a;
      11  _Alignas (int) int aa;
      12  enum e { E = _Alignof (double) };
      13  
      14  void
      15  fn (int n)
      16  {
      17    _Generic (n, int: 0);
      18  }