* non-nil not valid any more?
@ 2020-06-11 16:54 Andreas Röhler
2020-06-11 17:06 ` tomas
2020-06-11 18:10 ` Michael Heerdegen
0 siblings, 2 replies; 14+ messages in thread
From: Andreas Röhler @ 2020-06-11 16:54 UTC (permalink / raw)
To: Help GNU Emacs
Hi,
IIRC it was possible to write something like
(if non-nil (message "%s" "Wahr")(message "%s" "Falsch"))
Now get
Debugger entered--Lisp error: (void-variable non-nil)
GNU Emacs 28.0.50 (build 1, x86_64-pc-linux-gnu, GTK+ Version 2.24.32,
cairo version 1.16.0) of 2020-06-10
Thanks,
Andreas
^ permalink raw reply [flat|nested] 14+ messages in thread
* Re: non-nil not valid any more?
2020-06-11 16:54 non-nil not valid any more? Andreas Röhler
@ 2020-06-11 17:06 ` tomas
2020-06-11 17:14 ` Eli Zaretskii
2020-06-11 18:10 ` Michael Heerdegen
1 sibling, 1 reply; 14+ messages in thread
From: tomas @ 2020-06-11 17:06 UTC (permalink / raw)
To: help-gnu-emacs
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On Thu, Jun 11, 2020 at 06:54:23PM +0200, Andreas Röhler wrote:
> Hi,
>
> IIRC it was possible to write something like
>
> (if non-nil (message "%s" "Wahr")(message "%s" "Falsch"))
Hm. I didn't know about this one. "My" Emacs calls it `t' ;-)
Now more seriously: what would be the difference between
`non-nil' and '?
Cheers
-- t
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^ permalink raw reply [flat|nested] 14+ messages in thread
* Re: non-nil not valid any more?
2020-06-11 17:06 ` tomas
@ 2020-06-11 17:14 ` Eli Zaretskii
2020-06-11 17:41 ` Michael Albinus
0 siblings, 1 reply; 14+ messages in thread
From: Eli Zaretskii @ 2020-06-11 17:14 UTC (permalink / raw)
To: help-gnu-emacs
> Date: Thu, 11 Jun 2020 19:06:13 +0200
> From: <tomas@tuxteam.de>
>
> > IIRC it was possible to write something like
> >
> > (if non-nil (message "%s" "Wahr")(message "%s" "Falsch"))
>
> Hm. I didn't know about this one. "My" Emacs calls it `t' ;-)
Isn't `t` an obsolete alias for `non-nil`?
^ permalink raw reply [flat|nested] 14+ messages in thread
* Re: non-nil not valid any more?
2020-06-11 17:14 ` Eli Zaretskii
@ 2020-06-11 17:41 ` Michael Albinus
2020-06-11 17:58 ` Stefan Monnier
0 siblings, 1 reply; 14+ messages in thread
From: Michael Albinus @ 2020-06-11 17:41 UTC (permalink / raw)
To: Eli Zaretskii; +Cc: help-gnu-emacs
Eli Zaretskii <eliz@gnu.org> writes:
>> Date: Thu, 11 Jun 2020 19:06:13 +0200
>> From: <tomas@tuxteam.de>
>>
>> > IIRC it was possible to write something like
>> >
>> > (if non-nil (message "%s" "Wahr")(message "%s" "Falsch"))
>>
>> Hm. I didn't know about this one. "My" Emacs calls it `t' ;-)
>
> Isn't `t` an obsolete alias for `non-nil`?
Not obsolete. It's already removed in master.
^ permalink raw reply [flat|nested] 14+ messages in thread
* Re: non-nil not valid any more?
2020-06-11 17:41 ` Michael Albinus
@ 2020-06-11 17:58 ` Stefan Monnier
2020-06-11 18:00 ` Drew Adams
0 siblings, 1 reply; 14+ messages in thread
From: Stefan Monnier @ 2020-06-11 17:58 UTC (permalink / raw)
To: help-gnu-emacs
>> Isn't `t` an obsolete alias for `non-nil`?
> Not obsolete. It's already removed in master.
... which was hence renamed `maser`.
Sefan
^ permalink raw reply [flat|nested] 14+ messages in thread* RE: non-nil not valid any more?
2020-06-11 17:58 ` Stefan Monnier
@ 2020-06-11 18:00 ` Drew Adams
2020-06-11 18:44 ` tomas
0 siblings, 1 reply; 14+ messages in thread
From: Drew Adams @ 2020-06-11 18:00 UTC (permalink / raw)
To: Stefan Monnier, help-gnu-emacs
> >> Isn't `t` an obsolete alias for `non-nil`?
> > Not obsolete. It's already removed in master.
>
> ... which was hence renamed `maser`.
So `masnon-niler' is no longer supported? ;-)
^ permalink raw reply [flat|nested] 14+ messages in thread
* Re: non-nil not valid any more?
2020-06-11 18:00 ` Drew Adams
@ 2020-06-11 18:44 ` tomas
2020-06-11 19:18 ` Drew Adams
0 siblings, 1 reply; 14+ messages in thread
From: tomas @ 2020-06-11 18:44 UTC (permalink / raw)
To: help-gnu-emacs
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On Thu, Jun 11, 2020 at 11:00:46AM -0700, Drew Adams wrote:
> > >> Isn't `t` an obsolete alias for `non-nil`?
> > > Not obsolete. It's already removed in master.
> >
> > ... which was hence renamed `maser`.
>
> So `masnon-niler' is no longer supported? ;-)
Hey, folks -- you managed to confuse the hell out of me ;-)
Cheers
-- t
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^ permalink raw reply [flat|nested] 14+ messages in thread
* RE: non-nil not valid any more?
2020-06-11 18:44 ` tomas
@ 2020-06-11 19:18 ` Drew Adams
2020-06-11 20:23 ` tomas
0 siblings, 1 reply; 14+ messages in thread
From: Drew Adams @ 2020-06-11 19:18 UTC (permalink / raw)
To: tomas, help-gnu-emacs
> > > >> Isn't `t` an obsolete alias for `non-nil`?
> > > > Not obsolete. It's already removed in master.
> > >
> > > ... which was hence renamed `maser`.
> >
> > So `masnon-niler' is no longer supported? ;-)
>
> Hey, folks -- you managed to confuse the hell out of me ;-)
Sorry. I think Stefan was making a joke about
the letter `t' having been removed. Mine was
just to replace `t' with `non-nil'. Ignore...
^ permalink raw reply [flat|nested] 14+ messages in thread
* Re: non-nil not valid any more?
2020-06-11 19:18 ` Drew Adams
@ 2020-06-11 20:23 ` tomas
2020-06-11 21:19 ` Stefan Monnier
0 siblings, 1 reply; 14+ messages in thread
From: tomas @ 2020-06-11 20:23 UTC (permalink / raw)
To: Drew Adams; +Cc: help-gnu-emacs
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On Thu, Jun 11, 2020 at 12:18:26PM -0700, Drew Adams wrote:
> > > > >> Isn't `t` an obsolete alias for `non-nil`?
> > > > > Not obsolete. It's already removed in master.
> > > >
> > > > ... which was hence renamed `maser`.
> > >
> > > So `masnon-niler' is no longer supported? ;-)
> >
> > Hey, folks -- you managed to confuse the hell out of me ;-)
>
> Sorry. I think Stefan was making a joke about
> the letter `t' having been removed. Mine was
> just to replace `t' with `non-nil'. Ignore...
No need to apologize: though initially confused, I had my fun, too :)
Cheers
-- t
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^ permalink raw reply [flat|nested] 14+ messages in thread
* Re: non-nil not valid any more?
2020-06-11 20:23 ` tomas
@ 2020-06-11 21:19 ` Stefan Monnier
2020-06-12 7:43 ` tomas
2020-06-13 9:36 ` Michael Heerdegen
0 siblings, 2 replies; 14+ messages in thread
From: Stefan Monnier @ 2020-06-11 21:19 UTC (permalink / raw)
To: help-gnu-emacs
Hi omas,
> No need o apologize: hough iniially confused, I had my fun, oo :)
Wha?
Sefan
^ permalink raw reply [flat|nested] 14+ messages in thread* Re: non-nil not valid any more?
2020-06-11 21:19 ` Stefan Monnier
@ 2020-06-12 7:43 ` tomas
2020-06-13 9:36 ` Michael Heerdegen
1 sibling, 0 replies; 14+ messages in thread
From: tomas @ 2020-06-12 7:43 UTC (permalink / raw)
To: help-gnu-emacs
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On Thu, Jun 11, 2020 at 05:19:40PM -0400, Stefan Monnier wrote:
> Hi omas,
>
> > No need o apologize: hough iniially confused, I had my fun, oo :)
>
> Wha?
;-D
-- omás
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^ permalink raw reply [flat|nested] 14+ messages in thread
* Re: non-nil not valid any more?
2020-06-11 21:19 ` Stefan Monnier
2020-06-12 7:43 ` tomas
@ 2020-06-13 9:36 ` Michael Heerdegen
1 sibling, 0 replies; 14+ messages in thread
From: Michael Heerdegen @ 2020-06-13 9:36 UTC (permalink / raw)
To: Stefan Monnier; +Cc: help-gnu-emacs
Stefan Monnier <monnier@iro.umontreal.ca> writes:
> Sefan
So we can think of you as a part of Emacs? Good to know!
Michael.
^ permalink raw reply [flat|nested] 14+ messages in thread
* Re: non-nil not valid any more?
2020-06-11 16:54 non-nil not valid any more? Andreas Röhler
2020-06-11 17:06 ` tomas
@ 2020-06-11 18:10 ` Michael Heerdegen
2020-06-12 10:48 ` Andreas Röhler
1 sibling, 1 reply; 14+ messages in thread
From: Michael Heerdegen @ 2020-06-11 18:10 UTC (permalink / raw)
To: help-gnu-emacs
Andreas Röhler <andreas.roehler@easy-emacs.de> writes:
> Hi,
>
> IIRC it was possible to write something like
>
> (if non-nil (message "%s" "Wahr")(message "%s" "Falsch"))
>
> Now get
>
> Debugger entered--Lisp error: (void-variable non-nil)
Are you sure it wasn't quoted:
(if 'non-nil (message "%s" "Wahr")(message "%s" "Falsch"))
or did you define the symbol `non-nil' as a variable (with a non-nil
value)? :non-nil would work, too.
Michael.
^ permalink raw reply [flat|nested] 14+ messages in thread
* Re: non-nil not valid any more?
2020-06-11 18:10 ` Michael Heerdegen
@ 2020-06-12 10:48 ` Andreas Röhler
0 siblings, 0 replies; 14+ messages in thread
From: Andreas Röhler @ 2020-06-12 10:48 UTC (permalink / raw)
To: help-gnu-emacs
On 11.06.20 20:10, Michael Heerdegen wrote:
> Andreas Röhler <andreas.roehler@easy-emacs.de> writes:
>
>> Hi,
>>
>> IIRC it was possible to write something like
>>
>> (if non-nil (message "%s" "Wahr")(message "%s" "Falsch"))
>>
>> Now get
>>
>> Debugger entered--Lisp error: (void-variable non-nil)
> Are you sure it wasn't quoted:
>
> (if 'non-nil (message "%s" "Wahr")(message "%s" "Falsch"))
>
> or did you define the symbol `non-nil' as a variable (with a non-nil
> value)? :non-nil would work, too.
>
> Michael.
>
Seems that was a long living mistake. As `t' is a common char, assumed
in earlier lisp existed nil and non-nil as symbols for true and false.
^ permalink raw reply [flat|nested] 14+ messages in thread
end of thread, other threads:[~2020-06-13 9:36 UTC | newest]
Thread overview: 14+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2020-06-11 16:54 non-nil not valid any more? Andreas Röhler
2020-06-11 17:06 ` tomas
2020-06-11 17:14 ` Eli Zaretskii
2020-06-11 17:41 ` Michael Albinus
2020-06-11 17:58 ` Stefan Monnier
2020-06-11 18:00 ` Drew Adams
2020-06-11 18:44 ` tomas
2020-06-11 19:18 ` Drew Adams
2020-06-11 20:23 ` tomas
2020-06-11 21:19 ` Stefan Monnier
2020-06-12 7:43 ` tomas
2020-06-13 9:36 ` Michael Heerdegen
2020-06-11 18:10 ` Michael Heerdegen
2020-06-12 10:48 ` Andreas Röhler
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