gcc/testsuite/gcc.dg/transparent-union-3.c

   1 /* Test for ICEs on invalid transparent unions (empty or no named
   2    members).  Bug 21213.  */
   3 /* Origin: Joseph Myers <joseph@codesourcery.com> */
   4 /* { dg-do compile } */
   5 /* { dg-options "" } */
   6
   7 enum e { A };
   8
   9 union __attribute__((__transparent_union__)) ue1 { enum e; }; /* { dg-warning "warning: declaration does not declare anything" } */
  10 /* { dg-warning "warning: union cannot be made transparent" "" { target *-*-* } 9 } */
  11 union ue2 { enum e; } __attribute__((__transparent_union__)); /* { dg-warning "warning: declaration does not declare anything" } */
  12 /* { dg-warning "warning: union cannot be made transparent" "" { target *-*-* } 11 } */
  13
  14 union __attribute__((__transparent_union__)) ui1 { int; }; /* { dg-warning "warning: declaration does not declare anything" } */
  15 /* { dg-warning "warning: union cannot be made transparent" "" { target *-*-* } 14 } */
  16 union ui2 { int; } __attribute__((__transparent_union__)); /* { dg-warning "warning: declaration does not declare anything" } */
  17 /* { dg-warning "warning: union cannot be made transparent" "" { target *-*-* } 16 } */
  18
  19 union __attribute__((__transparent_union__)) u1 { };
  20 /* { dg-warning "warning: union cannot be made transparent" "" { target *-*-* } 19 } */
  21 union u2 { } __attribute__((__transparent_union__));
  22 /* { dg-warning "warning: union cannot be made transparent" "" { target *-*-* } 21 } */