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/* Test null pointer constants: typedefs for void should be OK but not

   qualified void.  */

/* Origin: Joseph Myers <joseph@codesourcery.com> */

/* { dg-do compile } */

/* { dg-options "-std=iso9899:1990 -pedantic-errors" } */

typedef void V;

int *p;

long *q;

int j;

void (*fp)(void);

void

f (void)

{

  /* (V *)0 is a null pointer constant, so the assignment should be

     diagnosed.  */

  q = (j ? p : (V *)0); /* { dg-error "5:assignment from incompatible pointer type" } */

  q = (j ? p : (void *)0); /* { dg-error "5:assignment from incompatible pointer type" } */

  /* And this conversion should be valid.  */

  (void (*)(void))(V *)0;

  (void (*)(void))(void *)0;

  /* Pointers to qualified void are not valid null pointer

     constants.  */

  fp = (const void *)0; /* { dg-error "6:ISO C forbids assignment between function pointer and 'void \\*'" } */

  fp = (void *)0;

  fp = (V *)0;

  fp = 0;

  fp == 0;

  fp == (void *)0;

  (void *)0 == fp;

  fp == (V *)0;

  (V *)0 == fp;

  fp == (V *)1; /* { dg-error "6:ISO C forbids comparison of 'void \\*' with function pointer" } */

  (V *)1 == fp; /* { dg-error "10:ISO C forbids comparison of 'void \\*' with function pointer" } */

  fp == (const void *)0; /* { dg-error "6:ISO C forbids comparison of 'void \\*' with function pointer" } */

  (const void *)0 == fp; /* { dg-error "19:ISO C forbids comparison of 'void \\*' with function pointer" } */

}