gcc/testsuite/gcc.dg/c23-unproto-3.c

   1 /* Test that declaring a function with () is the same as (void) in C23.  Valid
   2    use cases.  */
   3 /* { dg-do compile } */
   4 /* { dg-options "-std=c23 -pedantic-errors -Wstrict-prototypes" } */
   5
   6 void f1 ();
   7 void f1 (void);
   8
   9 void f2 (void);
  10 void f2 ();
  11
  12 typedef void T1 ();
  13 typedef void T1 (void);
  14
  15 void f3 ();
  16
  17 _Static_assert (_Generic (f3,
  18                           void (*) (int) : 1,
  19                           void (*) (void) : 2,
  20                           default : 3) == 2);