/* Traverse a complex number */
int
complex_traverse(vcomplex *c, int (*func)(void *ptr))
{
    int val;

    if ((val = func(c)) != 0)
        return val;

    if (v_traverse_seen(c))
        return 0;

    v_push_traverse(c);

    /* Internal pointer traversal would go here */

    v_pop_traverse();

    return 0;
}