* bug#5422: syntax highlighting bug
@ 2010-01-19 12:21 Bartosz Lew
2011-10-03 20:59 ` Glenn Morris
0 siblings, 1 reply; 6+ messages in thread
From: Bartosz Lew @ 2010-01-19 12:21 UTC (permalink / raw)
To: bug-gnu-emacs
Hi,
This is just to report on some minor C++ syntax highlighting problem in emacs.
when I write:
if (a < b->c()) { do this; } else { do that; }
two two things go wrong:
1) parentheses matching doesn't work correctly
emacs matches the closing bracket of the if condition with the "<" - "smaller
than" sign in the if condition.
2) the automatic positioning of any code written below gets confused due to
this parentheses matching problem.
I use:
GNU Emacs 23.1.1 (i386-redhat-linux-gnu, GTK+ Version 2.16.6)
of 2009-09-29 on x86-7.fedora.phx.redhat.com
Hope this is of any use.
Cheers,
Bart
^ permalink raw reply [flat|nested] 6+ messages in thread* bug#5422: syntax highlighting bug
2010-01-19 12:21 bug#5422: syntax highlighting bug Bartosz Lew
@ 2011-10-03 20:59 ` Glenn Morris
2011-10-03 21:24 ` Bartosz Lew
2011-10-04 5:32 ` Jan Djärv
0 siblings, 2 replies; 6+ messages in thread
From: Glenn Morris @ 2011-10-03 20:59 UTC (permalink / raw)
To: blew; +Cc: 5422
Bartosz Lew wrote:
> This is just to report on some minor C++ syntax highlighting problem
> in emacs.
>
> when I write:
>
> if (a < b->c()) { do this; } else { do that; }
>
> two two things go wrong:
> 1) parentheses matching doesn't work correctly
> emacs matches the closing bracket of the if condition with the
> "<" - "smaller > than" sign in the if condition.
>
> 2) the automatic positioning of any code written below gets confused due to
> this parentheses matching problem.
>
> I use:
>
> GNU Emacs 23.1.1 (i386-redhat-linux-gnu, GTK+ Version 2.16.6)
> of 2009-09-29 on x86-7.fedora.phx.redhat.com
I am unable to reproduce this in any version of Emacs, including 23.1.
If you still see the problem in the latest release, please send a
complete example starting from emacs -Q.
(There seem to have been some fixes in this area, eg
http://debbugs.gnu.org/cgi/bugreport.cgi?bug=4847 )
^ permalink raw reply [flat|nested] 6+ messages in thread* bug#5422: syntax highlighting bug
2011-10-03 20:59 ` Glenn Morris
@ 2011-10-03 21:24 ` Bartosz Lew
2011-10-04 5:32 ` Jan Djärv
1 sibling, 0 replies; 6+ messages in thread
From: Bartosz Lew @ 2011-10-03 21:24 UTC (permalink / raw)
To: Glenn Morris
Thanks for the email.
Well, I don't see this behaviour now either but now I'm working
on
Emacs 23.2.1 (x86_64-redhat-linux-gnu, GTK+ Version 2.24.4)
of 2011-05-23 on x86-12.phx2.fedoraproject.org
installed on a new computer.
I sent the bug report one laptop ago and that computer has crushed,
so I cannot easily go back to that configuration without system reinstall.
Anyway, everything seems fine with my current version.
Thanks again.
Bartek.
On Monday 03 of October 2011 22:59:17 you wrote:
> Bartosz Lew wrote:
> > This is just to report on some minor C++ syntax highlighting problem
> > in emacs.
> >
> > when I write:
> > if (a < b->c()) { do this; } else { do that; }
> >
> > two two things go wrong:
> > 1) parentheses matching doesn't work correctly
> >
> > emacs matches the closing bracket of the if condition with the
> >
> > "<" - "smaller > than" sign in the if condition.
> >
> > 2) the automatic positioning of any code written below gets confused due
> > to this parentheses matching problem.
> >
> > I use:
> > GNU Emacs 23.1.1 (i386-redhat-linux-gnu, GTK+ Version 2.16.6)
> > of 2009-09-29 on x86-7.fedora.phx.redhat.com
>
> I am unable to reproduce this in any version of Emacs, including 23.1.
> If you still see the problem in the latest release, please send a
> complete example starting from emacs -Q.
>
> (There seem to have been some fixes in this area, eg
> http://debbugs.gnu.org/cgi/bugreport.cgi?bug=4847 )
^ permalink raw reply [flat|nested] 6+ messages in thread* bug#5422: syntax highlighting bug
2011-10-03 20:59 ` Glenn Morris
2011-10-03 21:24 ` Bartosz Lew
@ 2011-10-04 5:32 ` Jan Djärv
2011-10-04 13:11 ` Michael Welsh Duggan
2011-10-06 15:38 ` Alan Mackenzie
1 sibling, 2 replies; 6+ messages in thread
From: Jan Djärv @ 2011-10-04 5:32 UTC (permalink / raw)
To: Glenn Morris; +Cc: blew@astro.uni.torun.pl, 5422@debbugs.gnu.org
Hello.
3 okt 2011 kl. 22:59 skrev Glenn Morris <rgm@gnu.org>:
> Bartosz Lew wrote:
>
>> This is just to report on some minor C++ syntax highlighting problem
>> in emacs.
>>
>> when I write:
>>
>> if (a < b->c()) { do this; } else { do that; }
>>
>> two two things go wrong:
>> 1) parentheses matching doesn't work correctly
>> emacs matches the closing bracket of the if condition with the
>> "<" - "smaller > than" sign in the if condition.
>>
>> 2) the automatic positioning of any code written below gets confused due to
>> this parentheses matching problem.
>>
>> I use:
>>
>> GNU Emacs 23.1.1 (i386-redhat-linux-gnu, GTK+ Version 2.16.6)
>> of 2009-09-29 on x86-7.fedora.phx.redhat.com
>
> I am unable to reproduce this in any version of Emacs, including 23.1.
> If you still see the problem in the latest release, please send a
> complete example starting from emacs -Q.
>
> (There seem to have been some fixes in this area, eg
> http://debbugs.gnu.org/cgi/bugreport.cgi?bug=4847 )
>
This is one of the elusive cc-mode bugs that isn't easy to reproduce.
AFAIK it depends on some cache in cc-mode getting out of sync. So you are more likely to see it on a large file you have edited in several places. It might even depend on what kind of editing you have done. I think this is a symptom of some underlying bug.
I see this in 23.3 and the trunk at least 2-3 times per day when editing code with a lot of templates. The < and > are mistaken for start/end brace or parentesis.
Save the file, kill the buffer, and reopen the file usually fixes it.
Jan D.
^ permalink raw reply [flat|nested] 6+ messages in thread* bug#5422: syntax highlighting bug
2011-10-04 5:32 ` Jan Djärv
@ 2011-10-04 13:11 ` Michael Welsh Duggan
2011-10-06 15:38 ` Alan Mackenzie
1 sibling, 0 replies; 6+ messages in thread
From: Michael Welsh Duggan @ 2011-10-04 13:11 UTC (permalink / raw)
To: Jan Djärv; +Cc: blew@astro.uni.torun.pl, 5422@debbugs.gnu.org
Jan Djärv <jan.h.d@swipnet.se> writes:
> Hello.
>
>
> 3 okt 2011 kl. 22:59 skrev Glenn Morris <rgm@gnu.org>:
>
>> Bartosz Lew wrote:
>>
>>> This is just to report on some minor C++ syntax highlighting problem
>>> in emacs.
[...]
>>
>> I am unable to reproduce this in any version of Emacs, including 23.1.
>> If you still see the problem in the latest release, please send a
>> complete example starting from emacs -Q.
>>
>> (There seem to have been some fixes in this area, eg
>> http://debbugs.gnu.org/cgi/bugreport.cgi?bug=4847 )
>>
>
> This is one of the elusive cc-mode bugs that isn't easy to reproduce.
>
> AFAIK it depends on some cache in cc-mode getting out of sync. So you
> are more likely to see it on a large file you have edited in several
> places. It might even depend on what kind of editing you have done. I
> think this is a symptom of some underlying bug.
>
> I see this in 23.3 and the trunk at least 2-3 times per day when
> editing code with a lot of templates. The < and > are mistaken for
> start/end brace or parentesis.
>
> Save the file, kill the buffer, and reopen the file usually fixes it.
I have been having similar problems, and am really hoping this gets
fixed in the pretest. I have an open bug (9560) which contains
information which hopefully can reproduce at least one of these cache
inconsistency errors.
--
Michael Welsh Duggan
(md5i@md5i.com)
^ permalink raw reply [flat|nested] 6+ messages in thread
* bug#5422: syntax highlighting bug
2011-10-04 5:32 ` Jan Djärv
2011-10-04 13:11 ` Michael Welsh Duggan
@ 2011-10-06 15:38 ` Alan Mackenzie
1 sibling, 0 replies; 6+ messages in thread
From: Alan Mackenzie @ 2011-10-06 15:38 UTC (permalink / raw)
To: Jan Djärv; +Cc: blew@astro.uni.torun.pl, 5422@debbugs.gnu.org
On Tue, Oct 04, 2011 at 07:32:57AM +0200, Jan Djärv wrote:
> Hello.
> 3 okt 2011 kl. 22:59 skrev Glenn Morris <rgm@gnu.org>:
> > Bartosz Lew wrote:
> >> This is just to report on some minor C++ syntax highlighting problem
> >> in emacs.
> >> when I write:
> >> if (a < b->c()) { do this; } else { do that; }
> >> two two things go wrong:
> >> 1) parentheses matching doesn't work correctly
> >> emacs matches the closing bracket of the if condition with the
> >> "<" - "smaller > than" sign in the if condition.
> >> 2) the automatic positioning of any code written below gets confused due to
> >> this parentheses matching problem.
> >> I use:
> >> GNU Emacs 23.1.1 (i386-redhat-linux-gnu, GTK+ Version 2.16.6)
> >> of 2009-09-29 on x86-7.fedora.phx.redhat.com
> > I am unable to reproduce this in any version of Emacs, including 23.1.
> > If you still see the problem in the latest release, please send a
> > complete example starting from emacs -Q.
> > (There seem to have been some fixes in this area, eg
> > http://debbugs.gnu.org/cgi/bugreport.cgi?bug=4847 )
> This is one of the elusive cc-mode bugs that isn't easy to reproduce.
> AFAIK it depends on some cache in cc-mode getting out of sync. So you
> are more likely to see it on a large file you have edited in several
> places. It might even depend on what kind of editing you have done. I
> think this is a symptom of some underlying bug.
> I see this in 23.3 and the trunk at least 2-3 times per day when
> editing code with a lot of templates. The < and > are mistaken for
> start/end brace or parentesis.
The < and > are marked (with syntax-table text properties) as parens when
they "look like" template brackets, as they sort of do in the OP's code.
Many moons ago, < and > got marked as parens individually. Now they are
only marked in pairs.
This has quite likely fixed the OP's bug.
> Save the file, kill the buffer, and reopen the file usually fixes it.
Yes. But that "shouldn't" be necessary any more.
> Jan D.
--
Alan Mackenzie (Nuremberg, Germany).
^ permalink raw reply [flat|nested] 6+ messages in thread
end of thread, other threads:[~2011-10-06 15:38 UTC | newest]
Thread overview: 6+ messages (download: mbox.gz follow: Atom feed
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2010-01-19 12:21 bug#5422: syntax highlighting bug Bartosz Lew
2011-10-03 20:59 ` Glenn Morris
2011-10-03 21:24 ` Bartosz Lew
2011-10-04 5:32 ` Jan Djärv
2011-10-04 13:11 ` Michael Welsh Duggan
2011-10-06 15:38 ` Alan Mackenzie
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