From: phillip.lord@newcastle.ac.uk (Phillip Lord)
To: Alexandre Oberlin <email_via_web@migo.info>
Cc: help-gnu-emacs@gnu.org
Subject: Re: Why is it not possible to use "nil" any more in init files ?
Date: Wed, 26 Nov 2014 14:18:42 +0000 [thread overview]
Message-ID: <87d28a3v0d.fsf@newcastle.ac.uk> (raw)
In-Reply-To: <op.xpv1vjumfjdmwo@tournesol> (Alexandre Oberlin's message of "Tue, 25 Nov 2014 17:10:21 +0100")
Alexandre Oberlin <email_via_web@migo.info> writes:
> On top of that, not having the explicit arguments work as once expected does
> not help. Really, ain’t it a bit confusing to have
> (cua-mode -1)
> return nil and
> (cua-mode nil)
> return t ?
Only if you actually do this. For instance,
(cua-mode -1)
(cua-mode 1)
works just fine and as expected.
Or even
(cua-mode 0)
(cua-mode 1)
Bottom line is that nil in lisp is overloaded. In this case,
it means both "explicit false" and "no argument supplied".
Life is a compromise, nil double so.
Phil
next prev parent reply other threads:[~2014-11-26 14:18 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-11-22 12:57 Why is it not possible to use "nil" any more in init files ? Alexandre Oberlin
2014-11-22 14:37 ` Stefan Monnier
[not found] ` <mailman.14325.1416667223.1147.help-gnu-emacs@gnu.org>
2014-11-25 13:19 ` Alexandre Oberlin
2014-11-25 13:50 ` Phillip Lord
2014-11-25 14:22 ` Stefan Monnier
[not found] ` <mailman.14536.1416925359.1147.help-gnu-emacs@gnu.org>
2014-11-25 16:10 ` Alexandre Oberlin
2014-11-26 14:18 ` Phillip Lord [this message]
[not found] ` <mailman.14663.1417011535.1147.help-gnu-emacs@gnu.org>
2014-11-26 14:39 ` Alexandre Oberlin
2014-11-26 21:12 ` Alexandre Oberlin
2015-01-19 10:31 ` WJ
2015-01-19 14:38 ` Stefan Monnier
[not found] ` <mailman.18143.1421678302.1147.help-gnu-emacs@gnu.org>
2015-01-19 14:56 ` Rusi
[not found] ` <mailman.14534.1416923435.1147.help-gnu-emacs@gnu.org>
2014-11-25 15:07 ` Alexandre Oberlin
2014-11-26 14:15 ` Phillip Lord
[not found] ` <mailman.14661.1417011326.1147.help-gnu-emacs@gnu.org>
2014-11-26 20:45 ` Alexandre Oberlin
2014-11-27 3:00 ` Stefan Monnier
2015-01-20 1:03 ` WJ
2015-01-21 6:50 ` Thien-Thi Nguyen
2014-11-25 15:07 ` Emacs User
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