* Syntax question for experts
@ 2008-05-23 6:48 Sébastien Vauban
2008-05-23 8:34 ` Thierry Volpiatto
2008-05-23 8:37 ` David Hansen
0 siblings, 2 replies; 3+ messages in thread
From: Sébastien Vauban @ 2008-05-23 6:48 UTC (permalink / raw)
To: help-gnu-emacs-mXXj517/zsQ
Hi,
A quick question...
I've seen both
--8<---------------cut here---------------start------------->8---
(add-hook 'shell-mode-hook
(lambda ()
(whatever)))
--8<---------------cut here---------------end--------------->8---
and
--8<---------------cut here---------------start------------->8---
(add-hook 'shell-mode-hook
'(lambda ()
(whatever)))
--8<---------------cut here---------------end--------------->8---
(see the quote in front of lambda).
What is the best writing? With or without the quote?
By "best", I mean more portable (XEmacs, etc.), or with a longer
life-time (won't become erroneous in a couple of years), etc.
Best regards,
Seb
--
Sébastien Vauban
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: Syntax question for experts
2008-05-23 6:48 Syntax question for experts Sébastien Vauban
@ 2008-05-23 8:34 ` Thierry Volpiatto
2008-05-23 8:37 ` David Hansen
1 sibling, 0 replies; 3+ messages in thread
From: Thierry Volpiatto @ 2008-05-23 8:34 UTC (permalink / raw)
To: Sébastien Vauban; +Cc: help-gnu-emacs
Sébastien Vauban <zthjwsqqafhv@spammotel.com> writes:
> Hi,
>
> A quick question...
>
> I've seen both
>
> (add-hook 'shell-mode-hook
> (lambda ()
> (whatever)))
>
> and
>
> (add-hook 'shell-mode-hook
> '(lambda ()
> (whatever)))
>
> (see the quote in front of lambda).
>
> What is the best writing? With or without the quote?
Without, read that:
http://www.emacswiki.org/cgi-bin/wiki/QuotedLambda
> By "best", I mean more portable (XEmacs, etc.), or with a longer
> life-time (won't become erroneous in a couple of years), etc.
>
> Best regards,
> Seb
If you want to quote the lambda , quote it like:
,----
| #'(lambda ()...)
`----
that is the same as
,----
| (function (lambda ()...))
`----
--
A + Thierry
Pub key: http://pgp.mit.edu
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: Syntax question for experts
2008-05-23 6:48 Syntax question for experts Sébastien Vauban
2008-05-23 8:34 ` Thierry Volpiatto
@ 2008-05-23 8:37 ` David Hansen
1 sibling, 0 replies; 3+ messages in thread
From: David Hansen @ 2008-05-23 8:37 UTC (permalink / raw)
To: help-gnu-emacs
On Fri, 23 May 2008 08:48:25 +0200 Sébastien Vauban wrote:
> (add-hook 'shell-mode-hook
> (lambda ()
> (whatever)))
>
> and
>
> (add-hook 'shell-mode-hook
> '(lambda ()
> (whatever)))
>
> (see the quote in front of lambda).
>
> What is the best writing? With or without the quote?
First one is better if you byte compile the code (the quoted expression
isn't byte compiled). Note that `lambda' is actually a macro that
expands to (function (lambda ...)).
Longer answer here:
http://www.emacswiki.org/cgi-bin/wiki/QuotedLambda
David
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2008-05-23 6:48 Syntax question for experts Sébastien Vauban
2008-05-23 8:34 ` Thierry Volpiatto
2008-05-23 8:37 ` David Hansen
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