GNU bug report logs - #11314
24.1.50; Regression: incorrect Lisp indentation for `if' with `@@@@@@'

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From: Andreas Schwab <schwab <at> linux-m68k.org>
To: Stefan Kangas <stefan <at> marxist.se>
Cc: 11314 <at> debbugs.gnu.org, Drew Adams <drew.adams <at> oracle.com>
Subject: bug#11314: 24.1.50; Regression: incorrect Lisp indentation for `if' with `@@@@@@'
Date: Fri, 01 Nov 2019 21:44:48 +0100

On Nov 01 2019, Stefan Kangas wrote:

> found 11314 27.0.50
> thanks
>
> "Drew Adams" <drew.adams <at> oracle.com> writes:
>
>> emacs -Q
>>  
>> Type this into an Emacs Lisp buffer:
>>  
>> (if (alpha beta) C-j aaaaaa C-j bbbbbb
>>  
>> You get this:
>>  
>> (if (alpha beta)
>>     aaaaaa
>>   bbbbbb
>>  
>> That is correct.  bbbbbb is indented correctly.
>>  
>> Now do the same thing, using @@@@@@ instead of aaaaaa.  This is the
>> result - bbbbbb is indented incorrectly.
>>  
>> (if (alpha beta)
>>     @@@@@@
>>     bbbbbb
>>  
>> Yet @@@@@@ is a perfectly good symbol/variable name etc.
>>  
>> This regression was introduced in Emacs 22.
>
> I can reproduce this on current master.

That's because @ has the prefix syntax flag (for ,@).

Andreas.

-- 
Andreas Schwab, schwab <at> linux-m68k.org
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