ptr_and_long
register struct ptr_and_long *pl_array = (ptr_and_long*)_arrays;
register struct ptr_and_long *pl_array = (ptr_and_long*)_arrays;
static struct ptr_and_long&
register struct ptr_and_long *array = (ptr_and_long*)io._arrays;
register struct ptr_and_long *new_array
= new ptr_and_long[1 + new_length];