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  }