From: Philip Kaludercic <philipk@posteo.net>
To: emacs-devel@gnu.org
Subject: Re: [ELPA] Add compat.el
Date: Thu, 07 Oct 2021 20:49:12 +0000 [thread overview]
Message-ID: <87y274mugn.fsf@posteo.net> (raw)
In-Reply-To: <87y278ieeh.fsf@posteo.net> (Philip Kaludercic's message of "Mon, 04 Oct 2021 23:00:38 +0000")
Philip Kaludercic <philipk@posteo.net> writes:
> Hello again,
>
> I have been working on compat.el over the last week, and have written a
> number of tests. The source code has been uploaded here:
>
> https://git.sr.ht/~pkal/compat
>
> The library should be usable in it's current state, but I'd be
> interested to hear from other people and developers too. There might be
> missing functions or macros, edge cases that could be added to the
> tests, etc. that could be improved.
An interesting issue I found when testing compat.el with older versions
is that string-replace and string-search fail, due to the same kind of
issue.
From Emacs 27 onwards, this works as expected:
(string-replace "\377" "x" "a\377b")
;; => "axb"
internally, the compatibility function for string-replace uses
replace-regexp-in-string.
The same code, when evaluated by a version of Emacs older than 27 fails
to replace the character
(string-replace "\377" "x" "a\377b")
;; => "a\377b"
For string-search, using string-match internally, the "unusual" byte
cannot be found:
(string-search (string-to-multibyte "\377") "ab\377c")
;; => nil
whereas the expected answer is 2.
I couldn't find anything in NEWS.27 to indicate that something had
changed, so I wonder if there was a bug that was fixed? Does anyone
know or remember why this behaviour changed?
--
Philip Kaludercic
next prev parent reply other threads:[~2021-10-07 20:49 UTC|newest]
Thread overview: 66+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-09-20 23:35 Proposal: Forwards-Compatibility Library for Emacs Philip Kaludercic
2021-09-21 0:30 ` Adam Porter
2021-09-21 4:10 ` Lars Ingebrigtsen
2021-09-21 8:28 ` Philip Kaludercic
2021-09-21 12:31 ` Stefan Monnier
2021-09-21 12:40 ` Eli Zaretskii
2021-09-21 12:50 ` Stefan Kangas
2021-09-21 13:38 ` Arthur Miller
2021-09-21 13:49 ` João Távora
2021-09-21 13:00 ` Philip Kaludercic
2021-09-21 13:12 ` Eli Zaretskii
2021-09-21 13:28 ` Philip Kaludercic
2021-09-21 13:24 ` João Távora
2021-09-21 13:29 ` Philip Kaludercic
2021-09-21 13:50 ` João Távora
2021-09-21 14:59 ` Lars Ingebrigtsen
2021-09-21 12:58 ` Philip Kaludercic
2021-09-21 13:37 ` Arthur Miller
2021-09-21 13:54 ` Philip Kaludercic
2021-09-21 14:18 ` Arthur Miller
2021-09-21 15:02 ` Lars Ingebrigtsen
2021-09-21 15:40 ` João Távora
2021-09-21 16:10 ` Philip Kaludercic
2021-09-21 16:22 ` João Távora
2021-09-21 17:22 ` Lars Ingebrigtsen
2021-09-21 17:29 ` João Távora
2021-09-21 19:24 ` Stefan Monnier
2021-09-21 21:06 ` Philip Kaludercic
2021-09-21 21:50 ` Stefan Monnier
2021-09-22 6:48 ` Philip Kaludercic
2021-09-22 17:53 ` Stefan Monnier
2021-09-22 18:54 ` Philip Kaludercic
2021-09-22 19:15 ` Stefan Monnier
2021-09-21 21:57 ` Lars Ingebrigtsen
2021-09-21 22:08 ` João Távora
2021-09-21 22:16 ` Lars Ingebrigtsen
2021-09-21 22:24 ` João Távora
2021-09-21 22:25 ` Lars Ingebrigtsen
2021-09-21 22:34 ` João Távora
2021-09-22 6:53 ` Philip Kaludercic
2021-09-22 7:12 ` João Távora
2021-09-22 7:14 ` Arthur Miller
2021-09-21 13:05 ` Philip Kaludercic
2021-09-21 13:27 ` Arthur Miller
2021-09-21 13:45 ` Philip Kaludercic
2021-09-21 14:05 ` Arthur Miller
2021-09-21 22:17 ` Richard Stallman
2021-09-21 22:24 ` Lars Ingebrigtsen
2021-09-22 9:54 ` Philip Kaludercic
2021-10-04 23:00 ` [ELPA] Add compat.el Philip Kaludercic
2021-10-07 7:03 ` Old (static) builds of Emacs Philip Kaludercic
2021-10-07 7:48 ` Michael Albinus
2021-10-07 7:56 ` Philip Kaludercic
2021-10-07 12:49 ` Stefan Monnier
2021-10-07 20:29 ` Philip Kaludercic
2021-10-07 21:21 ` Stefan Monnier
2021-11-30 21:21 ` Philip Kaludercic
2021-12-01 13:15 ` Stefan Monnier
2021-10-07 20:49 ` Philip Kaludercic [this message]
2021-10-08 5:56 ` [ELPA] Add compat.el Eli Zaretskii
2021-10-08 9:59 ` Philip Kaludercic
2021-10-08 11:10 ` Eli Zaretskii
2021-10-08 11:35 ` Philip Kaludercic
2021-10-08 7:45 ` Mattias Engdegård
2021-10-08 10:00 ` Philip Kaludercic
2021-10-15 19:08 ` Philip Kaludercic
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