1  /* { dg-do compile } */
       2  /* { dg-options "-Wc++-compat" } */
       3  
       4  typedef struct A { int i; } B;
       5  typedef struct T { int i; } *T; /* { dg-warning "using 'T' as both a typedef and a tag is invalid" } */
       6  typedef const float TFA;
       7  typedef TFA TFB;
       8  typedef TFB TFC;
       9  typedef int IA[];
      10  typedef IA *IAP;
      11  extern IAP arr[];
      12  
      13  void fn1 (B *); /* { dg-message "expected 'B \\*' {aka 'struct A \\*'} but argument is of type 'struct B \\*'" } */
      14  void fn2 (TFC *);
      15  
      16  void 
      17  bar (B *b, int *i)
      18  {
      19    fn1 ((struct B *) b); /* { dg-warning "passing argument" } */
      20    fn2 (i); /* { dg-warning "passing argument" } */
      21    sizeof (arr); /* { dg-error "invalid application of .sizeof. to incomplete type .int \\(\\*\\\[\\\]\\)\\\[\\\]." } */
      22  }
      23  
      24  int
      25  foo (void *a)
      26  {
      27    T t = a; /* { dg-warning "request for implicit conversion from 'void \\*' to 'T' {aka 'struct T \\*'} not" } */
      28    return t->i;
      29  }