From: Xiyue Deng <manphiz@gmail.com>
To: Eli Zaretskii <eliz@gnu.org>
Cc: 67669@debbugs.gnu.org
Subject: bug#67669: 29.1; Drop text suggesting using `and' to replace `if'
Date: Thu, 07 Dec 2023 01:08:51 -0800 [thread overview]
Message-ID: <87r0jytm58.fsf@debian-hx90.lan> (raw)
In-Reply-To: <83sf4e34s8.fsf@gnu.org> (Eli Zaretskii's message of "Thu, 07 Dec 2023 08:28:23 +0200")
Hi Eli,
Eli Zaretskii <eliz@gnu.org> writes:
>> From: Xiyue Deng <manphiz@gmail.com>
>> Date: Wed, 06 Dec 2023 13:47:02 -0800
>>
>>
>> In section "the `kill-new' function" - the third last paragraph to be
>> precise - there are some texts in parentheses that discusses potentially
>> using an `and' to replace the `if' statement being discussed. It looks
>> like to be referring to an earlier version of the code example[1] before
>> using the version from Emacs 22. Meanwhile, it looks like relying on
>> the side effect of `and' to emulate an `if' may not be a good idea
>> nowadays. So is it OK to drop this advice?
>
> AFAIU, the relevant fragment is:
>
> The expression looks like this:
>
> (if interprogram-cut-function
> (funcall interprogram-cut-function string (not replace))))
>
> If an ‘interprogram-cut-function’ exists, then Emacs executes
> ‘funcall’, which in turn calls its first argument as a function and
> passes the remaining arguments to it. (Incidentally, as far as I can
> see, this ‘if’ expression could be replaced by an ‘and’ expression
> similar to the one in the first part of the function.)
>
> I don't see anything wrong here. Can you elaborate on why you think
> the text in parentheses is inaccurate or incorrect or unclear?
Sorry I wasn't very clear. I was referring to the part "... could be
replaced by an ‘and’ expression similar to _the one in the first part of
the function_." But when I tried to search for `and' in the example
code of that section I found no `and' usage at all, which confused me a
bit. It was not until I looked at the texi source that I noticed that
the original example code did use `and' which I linked in my first
email, and it was later replace by the current one from Emacs 22 which
no longer used `and'. Thus I would consider the text in the parentheses
you quoted to be obsolete.
And of course as I mentioned in the previous email, IMHO it is probably
not a good advice to use `and' to emulate `if'.
>
> Thanks.
--
Xiyue Deng
next prev parent reply other threads:[~2023-12-07 9:08 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-12-06 21:47 bug#67669: 29.1; Drop text suggesting using `and' to replace `if' Xiyue Deng
[not found] ` <handler.67669.B.170189926211616.ack@debbugs.gnu.org>
2023-12-06 22:08 ` Xiyue Deng
2023-12-07 6:28 ` Eli Zaretskii
2023-12-07 9:08 ` Xiyue Deng [this message]
2023-12-07 10:16 ` Eli Zaretskii
2023-12-07 17:49 ` Xiyue Deng
2023-12-07 17:56 ` Eli Zaretskii
2023-12-07 19:54 ` Xiyue Deng
2023-12-07 20:22 ` Eli Zaretskii
2023-12-07 20:37 ` Xiyue Deng
2023-12-07 21:29 ` Drew Adams
2023-12-08 9:11 ` Xiyue Deng
2023-12-08 6:25 ` Eli Zaretskii
2023-12-08 9:07 ` Xiyue Deng
2023-12-08 15:37 ` Drew Adams
2023-12-07 19:37 ` Drew Adams
2023-12-07 20:00 ` Xiyue Deng
2023-12-08 10:45 ` Sean Whitton
2023-12-08 22:41 ` Xiyue Deng
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