1  /* Test diagnostics for arithmetic on void and function pointers.
       2     Test with no special options.  */
       3  /* Origin: Joseph Myers <joseph@codesourcery.com> */
       4  /* { dg-do compile } */
       5  /* { dg-options "" } */
       6  
       7  void *p;
       8  void (*f)(void);
       9  
      10  void
      11  g (void)
      12  {
      13    p + 0;
      14    p + 1;
      15    0 + p;
      16    1 + p;
      17    p - 0;
      18    p - 1;
      19    p += 0;
      20    p += 1;
      21    p -= 0;
      22    p -= 1;
      23    f + 0;
      24    f + 1;
      25    0 + f;
      26    1 + f;
      27    f - 0;
      28    f - 1;
      29    f += 0;
      30    f += 1;
      31    f -= 0;
      32    f -= 1;
      33    p[0]; /* { dg-warning "dereferencing 'void \\*' pointer" } */
      34    0[p]; /* { dg-warning "dereferencing 'void \\*' pointer" } */
      35    f[0]; /* { dg-error "subscripted value is pointer to function" } */
      36    0[f]; /* { dg-error "subscripted value is pointer to function" } */
      37    p - p;
      38    f - f;
      39  }