gcc/testsuite/gcc.dg/gnu2y-generic-1.c

   1 /* Test C2Y _Generic features: __extension__ suppresses -Wc23-c2y-compat
   2    warnings (and the state is restored after __extension__).  */
   3 /* { dg-do compile } */
   4 /* { dg-options "-std=gnu2y -pedantic-errors -Wc23-c2y-compat" } */
   5
   6 _Static_assert (__extension__ _Generic (const int, int : 1, const int : 2) == 2);
   7 _Static_assert (_Generic (const int, int : 1, const int : 2) == 2); /* { dg-warning "use of type name" } */
   8
   9 _Static_assert (__extension__ _Generic (void, int : 1, void : 2) == 2);
  10 _Static_assert (_Generic (void, int : 1, void : 2) == 2); /* { dg-warning "use of type name" } */
  11 /* { dg-warning "incomplete type" "incomplete type" { target *-*-* } .-1 } */
  12
  13 _Static_assert (__extension__ _Generic (int (), int (*) () : 1, int () : 2) == 2);
  14 _Static_assert (_Generic (int (), int (*) () : 1, int () : 2) == 2); /* { dg-warning "use of type name" } */
  15 /* { dg-warning "function type" "function type" { target *-*-* } .-1 } */