[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
bug#59275: Unexpected return value of `string-collate-lessp' on Mac
From: |
Eli Zaretskii |
Subject: |
bug#59275: Unexpected return value of `string-collate-lessp' on Mac |
Date: |
Sun, 27 Nov 2022 16:23:50 +0200 |
> From: Maxim Nikulin <m.a.nikulin@gmail.com>
> Date: Sun, 27 Nov 2022 21:00:50 +0700
> Cc: 59275@debbugs.gnu.org
>
> Concerning Org, my point is that caseless sorting should be uniform.
You need to work hard to get that. Just using 'downcase' is not enough, and
neither is using 'string-collate-equalp'.
> >> https://nullprogram.com/blog/2014/06/13/ that mentioned something
> >> similar about caveats with composition.
> >
> > I don't see there anything about sorting or collation. What did I miss?
>
> Does not composed/decomposed representation affect comparison result?
They are different texts, so yes, they do, and they should.
If you want to treat such strings as equivalent, you need to work even
harder, since Emacs currently doesn't have enough infrastructure to do it
right in all cases.
>
> Emacs-devel thread mentioned earlier in this bug contains a link
> describing enough issues with string comparison:
>
> https://stackoverflow.com/questions/319426/how-do-i-do-a-case-insensitive-string-comparison
This is about Python, no?
> From my point of view e.g. case transformation rule for Turkish I is a
> minor issue
Why, Org doesn't want to support Turkish users?
> My argument against `downcase' in `string-collate-lessp' is that it may
> add noticeable performance penalty.
I'd worry about correctness before performance.
> Interestingly `compare-strings' uses upcase conversion when the
> IGNORE-CASE argument is true. I believed that some implementations
> (unrelated to Emacs) may have problems with e.g. ß and considered
> downcase as a safer option.
Case conversions always have problems.
- bug#59275: Unexpected return value of `string-collate-lessp' on Mac, (continued)
- bug#59275: Unexpected return value of `string-collate-lessp' on Mac, Eli Zaretskii, 2022/11/22
- bug#59275: Unexpected return value of `string-collate-lessp' on Mac, Ihor Radchenko, 2022/11/23
- bug#59275: Unexpected return value of `string-collate-lessp' on Mac, Eli Zaretskii, 2022/11/23
- bug#59275: Unexpected return value of `string-collate-lessp' on Mac, Ihor Radchenko, 2022/11/23
- bug#59275: Unexpected return value of `string-collate-lessp' on Mac, Eli Zaretskii, 2022/11/24
- bug#59275: Unexpected return value of `string-collate-lessp' on Mac, Ihor Radchenko, 2022/11/25
- bug#59275: Unexpected return value of `string-collate-lessp' on Mac, Eli Zaretskii, 2022/11/26
- bug#59275: Unexpected return value of `string-collate-lessp' on Mac, Ihor Radchenko, 2022/11/26
- bug#59275: Unexpected return value of `string-collate-lessp' on Mac, Eli Zaretskii, 2022/11/26
- bug#59275: Unexpected return value of `string-collate-lessp' on Mac, Maxim Nikulin, 2022/11/27
- bug#59275: Unexpected return value of `string-collate-lessp' on Mac,
Eli Zaretskii <=
- bug#59275: Unexpected return value of `string-collate-lessp' on Mac, Maxim Nikulin, 2022/11/27
- bug#59275: Unexpected return value of `string-collate-lessp' on Mac, Eli Zaretskii, 2022/11/27