GNU bug report logs - #63398
28.2; Doc or behavior of replacement commands (e.g. `replace-string')

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Package: emacs;

Reported by: Drew Adams <drew.adams <at> oracle.com>

Date: Tue, 9 May 2023 20:14:01 UTC

Severity: normal

Found in version 28.2

Done: Eli Zaretskii <eliz <at> gnu.org>

Bug is archived. No further changes may be made.

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From: Juri Linkov <juri <at> linkov.net>
To: Drew Adams <drew.adams <at> oracle.com>
Cc: Eli Zaretskii <eliz <at> gnu.org>, "63398 <at> debbugs.gnu.org" <63398 <at> debbugs.gnu.org>
Subject: bug#63398: 28.2; Doc or behavior of replacement commands (e.g. `replace-string')
Date: Thu, 11 May 2023 09:23:00 +0300

>> The rules of replacement case-folding are more complex than documented.
>> `replace-match' checks if the initial is a caseless word constituent
>> like "0", and treats that like a lowercase initial.
>>
>> So  "test a → test b" replaces "Test A" with "Test B",
>> but "test 0 → test 1" replaces "Test 0" with "test 1".
>
> Can we fix this?  Should the behavior be changed?

I guess the default should never change.
But maybe the rules could be customized.

> Should the behavior remain like this and the doc
> be changed?

The current implementation of rules is quite complex.
No sure if all details can be documented succinctly.
This bug report was last modified 2 years and 12 days ago.

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