next

/*
 *  call-seq:
 *     int.next    => integer
 *     int.succ    => integer
 *
 *  Returns the <code>Integer</code> equal to <i>int</i> + 1.
 *
 *     1.next      #=> 2
 *     (-1).next   #=> 0
 */

static VALUE
int_succ(num)
    VALUE num;
{
    if (FIXNUM_P(num)) {
        long i = FIX2LONG(num) + 1;
        return LONG2NUM(i);
    }
    return rb_funcall(num, '+', 1, INT2FIX(1));
}