GNU bug report logs - #61281
“`(a \, b)” equals to “`(a . ,b)”

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Message #47 received at 61281 <at> debbugs.gnu.org (full text, mbox):

From: Jim Porter <jporterbugs <at> gmail.com>
To: Michael Heerdegen <michael_heerdegen <at> web.de>
Cc: Xie Shynur <one.last.kiss <at> outlook.com>,
 "61281 <at> debbugs.gnu.org" <61281 <at> debbugs.gnu.org>,
 Drew Adams <drew.adams <at> oracle.com>
Subject: Re: bug#61281: “`(a \, b)” equals to “`(a . , b)”
Date: Sun, 5 Feb 2023 17:14:52 -0800

On 2/5/2023 4:18 PM, Michael Heerdegen wrote:
> Michael Heerdegen <michael_heerdegen <at> web.de> writes:
> 
>> You mean the reader should emit a warning?  Note that at least
>> expressions printed by Emacs itself might be printed like this, e.g.
>>
>>    (nth 1 '`(a . ,b)) ==> (a \, b)
>>
>> so you would get warnings for automatically generated code.
> 
> An example is even in the original report.

Well, that's what I get for trying to send a message shortly before 
going to sleep.

> Maybe the printer could be taught to print (... . ,X) in this form
> instead of (... \, X).

This would probably be nice though (assuming it's sufficiently easy). 
The current printing form would likely confuse a novice programmer if 
they encountered it.

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