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Re: Bug #22983 (syntax-ppss returns wrong result) is still open. Could w
From: |
Clément Pit--Claudel |
Subject: |
Re: Bug #22983 (syntax-ppss returns wrong result) is still open. Could we fix it before the release, please. |
Date: |
Sun, 12 Jun 2016 21:44:35 -0400 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.8.0 |
On 2016-06-12 18:58, Dmitry Gutov wrote:
>> I have encountered no such problems in over 15 years of hacking
>> Emacs. I think you're seeing problems somewhere and blaming
>> narrow-to-region/widen, when the real problem is somewhere else.
>
> It's been a known problem for a while, and it has come up in multiple
> discussions over the last years.
>
> The "real problem" is a matter of perspective. Some might argue that
> trying to use narrowing at all, for any purpose, is a bad idea, and
> then, of course, the right choice would be to use something else.
I can share one instance of running into issues with narrow-to-region. I was
implementing a simple ‘presenter’ mode, such that special comments were used to
delimit ‘slides’. The mode functioned by narrowing the buffer to regions
delimited by these special comments. It was a very convenient way to page
through code in front of an audience.
Unfortunately, this approach was not robust. I ran into issues with modes using
(point-min) and (point-max) without widening, and thereby misplacing overlays.
In the end things kept breaking, and I ended up implementing the same feature
using two overlays with an invisible property, hiding everything before
(respectively after) the region being shown. It was a pain.
Not sure whether this is a useful contribution :) In any case, that's one
problem I ran into.
Clément.
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- Bug #22983 (syntax-ppss returns wrong result) is still open. Could we fix it before the release, please., Alan Mackenzie, 2016/06/07
- Re: Bug #22983 (syntax-ppss returns wrong result) is still open. Could we fix it before the release, please., Dmitry Gutov, 2016/06/07
- Re: Bug #22983 (syntax-ppss returns wrong result) is still open. Could we fix it before the release, please., Alan Mackenzie, 2016/06/07
- Re: Bug #22983 (syntax-ppss returns wrong result) is still open. Could we fix it before the release, please., Dmitry Gutov, 2016/06/07
- Re: Bug #22983 (syntax-ppss returns wrong result) is still open. Could we fix it before the release, please., Alan Mackenzie, 2016/06/11
- Re: Bug #22983 (syntax-ppss returns wrong result) is still open. Could we fix it before the release, please., Dmitry Gutov, 2016/06/11
- Re: Bug #22983 (syntax-ppss returns wrong result) is still open. Could we fix it before the release, please., Alan Mackenzie, 2016/06/11
- Re: Bug #22983 (syntax-ppss returns wrong result) is still open. Could we fix it before the release, please., Dmitry Gutov, 2016/06/11
- Re: Bug #22983 (syntax-ppss returns wrong result) is still open. Could we fix it before the release, please., Alan Mackenzie, 2016/06/12
- Re: Bug #22983 (syntax-ppss returns wrong result) is still open. Could we fix it before the release, please., Dmitry Gutov, 2016/06/12
- Re: Bug #22983 (syntax-ppss returns wrong result) is still open. Could we fix it before the release, please.,
Clément Pit--Claudel <=
- Re: Bug #22983 (syntax-ppss returns wrong result) is still open. Could we fix it before the release, please., Alan Mackenzie, 2016/06/13
- Re: Bug #22983 (syntax-ppss returns wrong result) is still open. Could we fix it before the release, please., Stefan Monnier, 2016/06/13
- RE: Bug #22983 (syntax-ppss returns wrong result) is still open. Could we fix it before the release, please., Drew Adams, 2016/06/13
- Re: Bug #22983 (syntax-ppss returns wrong result) is still open. Could we fix it before the release, please., Dmitry Gutov, 2016/06/13
- Re: Bug #22983 (syntax-ppss returns wrong result) is still open. Could we fix it before the release, please., Alan Mackenzie, 2016/06/14
- Re: Bug #22983 (syntax-ppss returns wrong result) is still open. Could we fix it before the release, please., John Wiegley, 2016/06/13
- Re: Bug #22983 (syntax-ppss returns wrong result) is still open. Could we fix it before the release, please., John Wiegley, 2016/06/13
Re: Bug #22983 (syntax-ppss returns wrong result) is still open. Could we fix it before the release, please., Stefan Monnier, 2016/06/08