bug#25480: 26.0.50; cc-mode: punctuation in comments can affect non-comment indentation

bug#25480: 26.0.50; cc-mode: punctuation in comments can affect non-comment indentation

[Dima Kogan]

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Hi. Found another possibly-obscure issue. I'm running a very recent
build of emacs: af3db69ee64

I have the attached minimized C source. If I

- load this source with emacs -Q
- move the point to 'struct'
- hit TAB

I would expect that line to be indented "correctly", with "correctly"
meaning starting at column 0 in this case. Instead, I see it indented to
column 2. This appears to be affected by the text in the preceding
comment. If I change "aaa)" to "aaa" then I get the desired behavior.

Thanks


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[-- Attachment #2: tst.h --]
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/*
aaa). bbb ccc <=
(dd >= f)
*/

struct S { int x; };

bug#25480: 26.0.50; cc-mode: punctuation in comments can affect non-comment indentation

[Noam Postavsky]

retitle 25480 cc-mode: open-paren-in-column-0 of comment affects non-comment indentation
quit

Dima Kogan <dima@secretsauce.net> writes:

> /*
> aaa). bbb ccc <=
> (dd >= f)
> */
>
> struct S { int x; };

Doing (setq open-paren-in-column-0-is-defun-start nil) fixes it.

Alternatively, keeping the open paren out of column 0:

/*
aaa). bbb ccc <=
 (dd >= f)
*/

struct S { int x; };

bug#25480: 26.0.50; cc-mode: punctuation in comments can affect non-comment indentation

[Dmitry Gutov]

On 11/29/17 5:24 AM, Noam Postavsky wrote:

> Doing (setq open-paren-in-column-0-is-defun-start nil) fixes it.
> 
> Alternatively, keeping the open paren out of column 0:
> 
> /*
> aaa). bbb ccc <=
>   (dd >= f)
> */
> 
> struct S { int x; };

Seems fixed on master (likely to be released as Emacs 27 someday)

bug#25480: 26.0.50; cc-mode: punctuation in comments can affect non-comment indentation

[Noam Postavsky]

close 25480
quit

Dmitry Gutov <dgutov@yandex.ru> writes:

> On 11/29/17 5:24 AM, Noam Postavsky wrote:
>
>> Doing (setq open-paren-in-column-0-is-defun-start nil) fixes it.
>>
>> Alternatively, keeping the open paren out of column 0:
>>
>> /*
>> aaa). bbb ccc <=
>>   (dd >= f)
>> */
>>
>> struct S { int x; };
>
> Seems fixed on master (likely to be released as Emacs 27 someday)

Actually, I can't reproduce it on emacs-26 now either.  Anyway, I don't
see any need to keep this open.