gcc/testsuite/gcc.dg/c23-tag-composite-5.c

   1 /* { dg-do compile }
   2  * { dg-options "-std=c23" }
   3  */
   4
   5 // anonymous structs / unions
   6
   7 extern struct foo { int (*x)[]; struct { int y; }; } a;
   8 extern struct foo { int (*x)[]; struct { int y; }; } a;
   9 extern struct bar { int (*x)[]; union { int y; }; } b;
  10 extern struct bar { int (*x)[]; union { int y; }; } b;
  11
  12 void f(void)
  13 {
  14         struct foo { int (*x)[1]; struct { int y; }; } c;
  15         extern typeof(*(1 ? &a : &c)) a;
  16         a.y;
  17
  18         struct bar { int (*x)[1]; union { int y; }; } d;
  19         extern typeof(*(1 ? &b : &d)) b;
  20         b.y;
  21 }
  22
  23
  24 struct foo { int (*x)[]; union { int y; }; };           /* { dg-error "redefinition" } */
  25