* bug#5373: Example in font-lock-add-keywords should use shy subgroup
@ 2010-01-13 10:26 Lennart Borgman
2010-01-13 15:18 ` Stefan Monnier
0 siblings, 1 reply; 6+ messages in thread
From: Lennart Borgman @ 2010-01-13 10:26 UTC (permalink / raw)
To: emacs-pretest-bug
Should not the second regexp in
(font-lock-add-keywords 'c-mode
'(("\\<\\(FIXME\\):" 1 font-lock-warning-face prepend)
("\\<\\(and\\|or\\|not\\)\\>" . font-lock-keyword-face)))
use a shy subgroup like in
(font-lock-add-keywords 'c-mode
'(("\\<\\(FIXME\\):" 1 font-lock-warning-face prepend)
("\\<\\(?:and\\|or\\|not\\)\\>" . font-lock-keyword-face)))
Same problem with the second example.
^ permalink raw reply [flat|nested] 6+ messages in thread
* bug#5373: Example in font-lock-add-keywords should use shy subgroup
2010-01-13 10:26 bug#5373: Example in font-lock-add-keywords should use shy subgroup Lennart Borgman
@ 2010-01-13 15:18 ` Stefan Monnier
2010-01-13 15:19 ` Lennart Borgman
0 siblings, 1 reply; 6+ messages in thread
From: Stefan Monnier @ 2010-01-13 15:18 UTC (permalink / raw)
To: Lennart Borgman; +Cc: 5373
> Should not the second regexp in
> (font-lock-add-keywords 'c-mode
> '(("\\<\\(FIXME\\):" 1 font-lock-warning-face prepend)
> ("\\<\\(and\\|or\\|not\\)\\>" . font-lock-keyword-face)))
> use a shy subgroup like in
> (font-lock-add-keywords 'c-mode
> '(("\\<\\(FIXME\\):" 1 font-lock-warning-face prepend)
> ("\\<\\(?:and\\|or\\|not\\)\\>" . font-lock-keyword-face)))
It could. But the use of a normal group is harmless.
Stefan
^ permalink raw reply [flat|nested] 6+ messages in thread
* bug#5373: Example in font-lock-add-keywords should use shy subgroup
2010-01-13 15:18 ` Stefan Monnier
@ 2010-01-13 15:19 ` Lennart Borgman
2010-01-13 16:01 ` Chong Yidong
0 siblings, 1 reply; 6+ messages in thread
From: Lennart Borgman @ 2010-01-13 15:19 UTC (permalink / raw)
To: Stefan Monnier; +Cc: 5373
On Wed, Jan 13, 2010 at 4:18 PM, Stefan Monnier
<monnier@iro.umontreal.ca> wrote:
>> Should not the second regexp in
>
>> (font-lock-add-keywords 'c-mode
>> '(("\\<\\(FIXME\\):" 1 font-lock-warning-face prepend)
>> ("\\<\\(and\\|or\\|not\\)\\>" . font-lock-keyword-face)))
>
>> use a shy subgroup like in
>
>> (font-lock-add-keywords 'c-mode
>> '(("\\<\\(FIXME\\):" 1 font-lock-warning-face prepend)
>> ("\\<\\(?:and\\|or\\|not\\)\\>" . font-lock-keyword-face)))
>
> It could. But the use of a normal group is harmless.
I thought it was slower?
^ permalink raw reply [flat|nested] 6+ messages in thread
* bug#5373: Example in font-lock-add-keywords should use shy subgroup
2010-01-13 15:19 ` Lennart Borgman
@ 2010-01-13 16:01 ` Chong Yidong
2010-01-13 16:08 ` Lennart Borgman
0 siblings, 1 reply; 6+ messages in thread
From: Chong Yidong @ 2010-01-13 16:01 UTC (permalink / raw)
To: Lennart Borgman; +Cc: 5373
Lennart Borgman <lennart.borgman@gmail.com> writes:
>> It could. But the use of a normal group is harmless.
>
> I thought it was slower?
No, it's not. Maybe you're thinking about greedy matching? Anyway, I'm
going to close this bug.
^ permalink raw reply [flat|nested] 6+ messages in thread
* bug#5373: Example in font-lock-add-keywords should use shy subgroup
2010-01-13 16:01 ` Chong Yidong
@ 2010-01-13 16:08 ` Lennart Borgman
2010-01-13 18:58 ` bug#5373: Example in font-lock-add-keywords should use shy Stefan Monnier
0 siblings, 1 reply; 6+ messages in thread
From: Lennart Borgman @ 2010-01-13 16:08 UTC (permalink / raw)
To: Chong Yidong; +Cc: 5373
On Wed, Jan 13, 2010 at 5:01 PM, Chong Yidong <cyd@stupidchicken.com> wrote:
> Lennart Borgman <lennart.borgman@gmail.com> writes:
>
>>> It could. But the use of a normal group is harmless.
>>
>> I thought it was slower?
>
> No, it's not. Maybe you're thinking about greedy matching? Anyway, I'm
> going to close this bug.
No, I was not. I just thought finding the extra match data was a bit slower.
Thanks for telling.
^ permalink raw reply [flat|nested] 6+ messages in thread
* bug#5373: Example in font-lock-add-keywords should use shy
2010-01-13 16:08 ` Lennart Borgman
@ 2010-01-13 18:58 ` Stefan Monnier
0 siblings, 0 replies; 6+ messages in thread
From: Stefan Monnier @ 2010-01-13 18:58 UTC (permalink / raw)
To: Lennart Borgman; +Cc: Chong Yidong, 5373
>>>> It could. But the use of a normal group is harmless.
>>> I thought it was slower?
>> No, it's not. Maybe you're thinking about greedy matching? Anyway, I'm
>> going to close this bug.
> No, I was not. I just thought finding the extra match data was a bit slower.
> Thanks for telling.
Well, it is marginally slower, but you'd be hard pressed to measure
the difference.
Stefan
^ permalink raw reply [flat|nested] 6+ messages in thread
end of thread, other threads:[~2010-01-13 18:58 UTC | newest]
Thread overview: 6+ messages (download: mbox.gz follow: Atom feed
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2010-01-13 10:26 bug#5373: Example in font-lock-add-keywords should use shy subgroup Lennart Borgman
2010-01-13 15:18 ` Stefan Monnier
2010-01-13 15:19 ` Lennart Borgman
2010-01-13 16:01 ` Chong Yidong
2010-01-13 16:08 ` Lennart Borgman
2010-01-13 18:58 ` bug#5373: Example in font-lock-add-keywords should use shy Stefan Monnier
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