From: <tomas@tuxteam.de>
To: help-gnu-emacs@gnu.org
Subject: Re: let, let*, oh, why [was: Elisp - Function returning a list]
Date: Wed, 16 Dec 2020 21:34:48 +0100 [thread overview]
Message-ID: <20201216203448.GB5230@tuxteam.de> (raw)
In-Reply-To: <X9pokId/gshhBciA@protected.rcdrun.com>
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On Wed, Dec 16, 2020 at 11:05:36PM +0300, Jean Louis wrote:
> * Stefan Monnier <monnier@iro.umontreal.ca> [2020-12-16 22:05]:
> > >> That doesn't do what you usually want.
> > > Help me to understand why?
> >
> > https://lists.gnu.org/archive/html/emacs-devel/2020-11/msg00750.html
>
> Is it possible to show example that it will not work as expected?
Compose a file roughly like this:
(let ((canary 'lexical))
(defun test-binding ()
(insert (format "binding is %S" canary))))
(let ((canary 'dynamic))
(test-binding))
Now save it, say as /tmp/foo.el.
Next, from some buffer (say *scratch*), do M-x load-file <ENTER> /tmp/foo.el <ENTER>.
This will put in your buffer "binding is dynamic" (since that's the
default).
Now test again
(1) having inserted (setq lexical-binding t) at the top of the above
file
(2) having inserted -*- lexical-binding: t -*- at the top of the
above file.
Compare results. Discuss :-)
(Cheatsheet: in case (1), the variable `lexical-binding' has been set
in the buffer from which you called `load-file', which was, if you
chose the same setting as me, *scratch*. In the second case, the
setting of the lexical binding was effective for the source file
itself, i.e. foo.el)
Cheers
- t
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next prev parent reply other threads:[~2020-12-16 20:34 UTC|newest]
Thread overview: 60+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-12-16 3:25 Elisp - Function returning a list steve-humphreys
2020-12-16 4:09 ` Jean Louis
2020-12-16 4:17 ` Emanuel Berg via Users list for the GNU Emacs text editor
2020-12-16 5:04 ` steve-humphreys
2020-12-16 5:39 ` Emanuel Berg via Users list for the GNU Emacs text editor
2020-12-16 7:36 ` steve-humphreys
2020-12-16 8:55 ` Joost Kremers
2020-12-16 10:25 ` Emanuel Berg via Users list for the GNU Emacs text editor
2020-12-16 11:52 ` let, let*, oh, why [was: Elisp - Function returning a list] tomas
2020-12-16 14:13 ` Emanuel Berg via Users list for the GNU Emacs text editor
2020-12-16 15:10 ` Jean Louis
2020-12-16 15:58 ` Stefan Monnier
2020-12-16 18:37 ` Jean Louis
2020-12-16 19:04 ` Stefan Monnier
2020-12-16 20:05 ` Jean Louis
2020-12-16 20:34 ` tomas [this message]
2020-12-16 20:06 ` tomas
2020-12-18 15:08 ` Emanuel Berg via Users list for the GNU Emacs text editor
2020-12-18 14:27 ` Emanuel Berg via Users list for the GNU Emacs text editor
2020-12-18 17:42 ` Jean Louis
2020-12-18 20:57 ` Eli Zaretskii
2020-12-20 4:49 ` Emanuel Berg via Users list for the GNU Emacs text editor
2020-12-20 5:06 ` Thien-Thi Nguyen
2020-12-20 7:02 ` Emanuel Berg via Users list for the GNU Emacs text editor
2020-12-20 7:16 ` Thien-Thi Nguyen
2020-12-21 2:34 ` Emanuel Berg via Users list for the GNU Emacs text editor
2020-12-20 13:38 ` Jean Louis
2020-12-20 6:21 ` Jean Louis
2020-12-20 23:20 ` Drew Adams
2020-12-21 4:50 ` Jean Louis
2020-12-21 5:40 ` Emanuel Berg via Users list for the GNU Emacs text editor
2020-12-21 9:17 ` tomas
2020-12-21 15:20 ` Drew Adams
2020-12-21 15:50 ` tomas
2020-12-25 14:41 ` 황병희
2020-12-26 4:22 ` Emanuel Berg via Users list for the GNU Emacs text editor
2020-12-26 6:18 ` Jean Louis
2020-12-26 6:33 ` Emanuel Berg via Users list for the GNU Emacs text editor
2020-12-26 7:07 ` Christopher Dimech
2020-12-26 9:53 ` Jean Louis
2020-12-26 10:11 ` Emanuel Berg via Users list for the GNU Emacs text editor
2020-12-26 9:53 ` Jean Louis
2020-12-26 10:20 ` Emanuel Berg via Users list for the GNU Emacs text editor
2020-12-27 9:11 ` Byung-Hee HWANG
2020-12-27 11:52 ` Emanuel Berg via Users list for the GNU Emacs text editor
2020-12-27 11:56 ` Emanuel Berg via Users list for the GNU Emacs text editor
2020-12-26 6:44 ` Byung-Hee HWANG
2020-12-16 4:30 ` Elisp - Function returning a list steve-humphreys
2020-12-16 4:38 ` Yuri Khan
2020-12-16 4:48 ` Emanuel Berg via Users list for the GNU Emacs text editor
2020-12-16 5:20 ` steve-humphreys
2020-12-16 5:18 ` steve-humphreys
2020-12-16 5:33 ` Jean Louis
2020-12-16 5:42 ` Emanuel Berg via Users list for the GNU Emacs text editor
2020-12-16 8:01 ` Elisp - Function returning a sequence of times Jean Louis
2020-12-16 9:05 ` steve-humphreys
2020-12-16 9:20 ` Joost Kremers
2020-12-16 9:40 ` steve-humphreys
2020-12-16 21:54 ` Michael Heerdegen
2020-12-16 4:13 ` Elisp - Function returning a list Emanuel Berg via Users list for the GNU Emacs text editor
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