Re: Bit shift oddity?

[Douglas Lewan]

Thanks. I see the same behavior with (ash).

On 10/19/20 3:06 AM, tomas@tuxteam.de wrote:
> On Sun, Oct 18, 2020 at 08:19:24PM -0400, Douglas Lewan wrote:
> > I see the following:
> >
> >     ELISP> (= (lsh -1 (lognot 0)) (lsh -2 (lognot 0)))
> >
> >     t
> >
> >     ELISP> (= (lsh -1 (lognot 0)) (lsh -3 (lognot 0)))
> >
> >     nil
> >
> > The first seems odd to me. Is it really what's expected?
> The manual for lsh talks about "quirky behaviour" of lsh when
> both arguments are negative, in the name of backward-compatibility
> and suggests resorting to ash. Cf. the Emacs lisp manual "3.8
> Bitwise Operations on Integers"
>
> Cheers
>   - t

--
,Doug
d.lewan2000@gmail.com
(908) 720 7908

You know, it's amazing how much closer to 0 that 8 067 332 is than 15 is. (2020 
Oct 18)