gcc/testsuite/gcc.dg/gnu23-tag-enum-1.c

   1 /*
   2  * { dg-do compile }
   3  * { dg-options "-std=gnu23" }
   4  */
   5
   6
   7
   8 void test2(void)
   9 {
  10   enum ee *a;
  11   enum ee { F = 2 } *b;
  12   b = a;
  13 }
  14
  15
  16
  17 enum A { B = 7 } y;
  18
  19 void g(void)
  20 {
  21         // incomplete during construction
  22         // this is a GNU extension because enum A is used
  23         // before the type is completed.
  24
  25         enum A { B = _Generic(&y, enum A*: 1, default: 7) };
  26         _Static_assert(7 == B, "");
  27 }
  28
  29