gcc/testsuite/gcc.dg/gnu-cond-expr-2.c

   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 }