1  /* Test diagnostic for GNU extension: omitting middle term of
       2     conditional expression.  Test with -pedantic.  */
       3  /* Origin: Joseph Myers <joseph@codesourcery.com> */
       4  /* { dg-do compile } */
       5  /* { dg-options "-std=gnu99 -pedantic" } */
       6  
       7  int a, b, c;
       8  
       9  void
      10  f (void)
      11  {
      12    c = (++a ? : b); /* { dg-warning "ISO C forbids omitting the middle term of a '\\?:' expression" } */
      13  }