gcc/testsuite/gcc.dg/anon-struct-13.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-fplan9-extensions" } */
   3
   4 /* Test for ambiguity when using the Plan 9 extensions.  */
   5
   6 struct A {
   7   char a;               /* { dg-error "duplicate member" } */
   8 };
   9
  10 struct B
  11 {
  12   struct A;
  13   struct A;
  14 };
  15
  16 char
  17 f1 (struct B *p)
  18 {
  19   return p->a;          /* { dg-error "no member" } */
  20 }
  21
  22 void
  23 f2 (struct A *p)        /* { dg-message "expected" } */
  24 {
  25 }
  26
  27 void
  28 f3 (struct B *p)
  29 {
  30   f2 (p);               /* { dg-warning "incompatible pointer type" } */
  31 }
  32
  33 struct C
  34 {
  35   char c;               /* { dg-error "duplicate member" } */
  36 };
  37
  38 struct D
  39 {
  40   struct C;
  41 };
  42
  43 struct E
  44 {
  45   struct C;
  46   struct D;
  47 };
  48
  49 char
  50 f4 (struct E *p)
  51 {
  52   return p->c;          /* { dg-error "no member" } */
  53 }
  54
  55 void
  56 f6 (struct C *p)        /* { dg-message "expected" } */
  57 {
  58 }
  59
  60 void
  61 f7 (struct E *p)
  62 {
  63   f6 (p);               /* { dg-warning "incompatible pointer type" } */
  64 }
  65
  66 struct A
  67 f8 (struct B *p)
  68 {
  69   return p->A;          /* { dg-error "no member" } */
  70 }
  71
  72 struct C
  73 f9 (struct E *p)
  74 {
  75   return p->C;          /* { dg-error "no member" } */
  76 }