* bug#46274: 28.0.50; Inconsistent doc for syntax-propertize-function
@ 2021-02-03 20:04 Filipp Gunbin
2021-02-04 8:34 ` Lars Ingebrigtsen
0 siblings, 1 reply; 6+ messages in thread
From: Filipp Gunbin @ 2021-02-03 20:04 UTC (permalink / raw)
To: 46274
C-h v syntax-propertize-function contains this text:
--8<---------------cut here---------------start------------->8---
The specified function may call `syntax-ppss' on any position
before END, but if it calls `syntax-ppss' on some
position and later modifies the buffer on some earlier position,
then it is its responsibility to call `syntax-ppss-flush-cache' to flush
the now obsolete ppss info from the cache.
--8<---------------cut here---------------end--------------->8---
But (info "(elisp) Syntax Properties") has a different view:
--8<---------------cut here---------------start------------->8---
It is allowed to call ‘syntax-ppss’ on any position before END.
However, it should not call ‘syntax-ppss-flush-cache’; so, it is not
allowed to call ‘syntax-ppss’ on some position and later modify the
buffer at an earlier position.
--8<---------------cut here---------------end--------------->8---
Which is the right one?
Thanks.
In GNU Emacs 28.0.50 (build 1, x86_64-apple-darwin20.2.0, NS appkit-2022.20 Version 11.1 (Build 20C69))
of 2021-02-03 built on fgunbin.local
Repository revision: 20e48b6fd6cade60e468140a66127d326abfb8ff
Repository branch: master
System Description: macOS 11.1
^ permalink raw reply [flat|nested] 6+ messages in thread
* bug#46274: 28.0.50; Inconsistent doc for syntax-propertize-function
2021-02-03 20:04 bug#46274: 28.0.50; Inconsistent doc for syntax-propertize-function Filipp Gunbin
@ 2021-02-04 8:34 ` Lars Ingebrigtsen
2021-02-04 16:23 ` Stefan Monnier
2021-02-04 20:34 ` Stefan Monnier
0 siblings, 2 replies; 6+ messages in thread
From: Lars Ingebrigtsen @ 2021-02-04 8:34 UTC (permalink / raw)
To: 46274; +Cc: Stefan Monnier
Filipp Gunbin <fgunbin@fastmail.fm> writes:
> C-h v syntax-propertize-function contains this text:
>
> The specified function may call `syntax-ppss' on any position
> before END, but if it calls `syntax-ppss' on some
> position and later modifies the buffer on some earlier position,
> then it is its responsibility to call `syntax-ppss-flush-cache' to flush
> the now obsolete ppss info from the cache.
>
> But (info "(elisp) Syntax Properties") has a different view:
>
> It is allowed to call ‘syntax-ppss’ on any position before END.
> However, it should not call ‘syntax-ppss-flush-cache’; so, it is not
> allowed to call ‘syntax-ppss’ on some position and later modify the
> buffer at an earlier position.
>
> Which is the right one?
Good question. Stefan M added to the CCs.
--
(domestic pets only, the antidote for overdose, milk.)
bloggy blog: http://lars.ingebrigtsen.no
^ permalink raw reply [flat|nested] 6+ messages in thread
* bug#46274: 28.0.50; Inconsistent doc for syntax-propertize-function
2021-02-04 8:34 ` Lars Ingebrigtsen
@ 2021-02-04 16:23 ` Stefan Monnier
2021-02-05 8:38 ` Lars Ingebrigtsen
2021-02-04 20:34 ` Stefan Monnier
1 sibling, 1 reply; 6+ messages in thread
From: Stefan Monnier @ 2021-02-04 16:23 UTC (permalink / raw)
To: Lars Ingebrigtsen; +Cc: 46274
>> C-h v syntax-propertize-function contains this text:
>>
>> The specified function may call `syntax-ppss' on any position
>> before END, but if it calls `syntax-ppss' on some
>> position and later modifies the buffer on some earlier position,
>> then it is its responsibility to call `syntax-ppss-flush-cache' to flush
>> the now obsolete ppss info from the cache.
>>
>> But (info "(elisp) Syntax Properties") has a different view:
>>
>> It is allowed to call ‘syntax-ppss’ on any position before END.
>> However, it should not call ‘syntax-ppss-flush-cache’; so, it is not
>> allowed to call ‘syntax-ppss’ on some position and later modify the
>> buffer at an earlier position.
>>
>> Which is the right one?
>
> Good question. Stefan M added to the CCs.
Great question. Thanks for asking.
Stefan
^ permalink raw reply [flat|nested] 6+ messages in thread* bug#46274: 28.0.50; Inconsistent doc for syntax-propertize-function
2021-02-04 16:23 ` Stefan Monnier
@ 2021-02-05 8:38 ` Lars Ingebrigtsen
2021-02-05 14:59 ` Filipp Gunbin
0 siblings, 1 reply; 6+ messages in thread
From: Lars Ingebrigtsen @ 2021-02-05 8:38 UTC (permalink / raw)
To: Stefan Monnier; +Cc: 46274
Stefan Monnier <monnier@iro.umontreal.ca> writes:
>> Good question. Stefan M added to the CCs.
>
> Great question. Thanks for asking.
You're welcome, I'm sure.
Stefan Monnier <monnier@iro.umontreal.ca> writes:
> I think the docstring is the one that's more right (especially since
> there is a fair number of syntax-propertize-functions which do call
> ‘syntax-ppss-flush-cache’).
OK, I've now updated the manual in Emacs 28 (by just copying the bit
from the doc string and tweaking it slightly).
--
(domestic pets only, the antidote for overdose, milk.)
bloggy blog: http://lars.ingebrigtsen.no
^ permalink raw reply [flat|nested] 6+ messages in thread
* bug#46274: 28.0.50; Inconsistent doc for syntax-propertize-function
2021-02-04 8:34 ` Lars Ingebrigtsen
2021-02-04 16:23 ` Stefan Monnier
@ 2021-02-04 20:34 ` Stefan Monnier
1 sibling, 0 replies; 6+ messages in thread
From: Stefan Monnier @ 2021-02-04 20:34 UTC (permalink / raw)
To: Lars Ingebrigtsen; +Cc: 46274
>> C-h v syntax-propertize-function contains this text:
>>
>> The specified function may call `syntax-ppss' on any position
>> before END, but if it calls `syntax-ppss' on some
>> position and later modifies the buffer on some earlier position,
>> then it is its responsibility to call `syntax-ppss-flush-cache' to flush
>> the now obsolete ppss info from the cache.
>>
>> But (info "(elisp) Syntax Properties") has a different view:
>>
>> It is allowed to call ‘syntax-ppss’ on any position before END.
>> However, it should not call ‘syntax-ppss-flush-cache’; so, it is not
>> allowed to call ‘syntax-ppss’ on some position and later modify the
>> buffer at an earlier position.
>>
>> Which is the right one?
>
> Good question. Stefan M added to the CCs.
I think the docstring is the one that's more right (especially since
there is a fair number of syntax-propertize-functions which do call
‘syntax-ppss-flush-cache’).
Stefan
^ permalink raw reply [flat|nested] 6+ messages in thread
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2021-02-03 20:04 bug#46274: 28.0.50; Inconsistent doc for syntax-propertize-function Filipp Gunbin
2021-02-04 8:34 ` Lars Ingebrigtsen
2021-02-04 16:23 ` Stefan Monnier
2021-02-05 8:38 ` Lars Ingebrigtsen
2021-02-05 14:59 ` Filipp Gunbin
2021-02-04 20:34 ` Stefan Monnier
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