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bug#65536: 30.0.50; replace-regexp-in-string documentation does not ment
From: |
Eli Zaretskii |
Subject: |
bug#65536: 30.0.50; replace-regexp-in-string documentation does not mention it saves match data |
Date: |
Sat, 26 Aug 2023 09:09:11 +0300 |
> Date: Fri, 25 Aug 2023 18:56:15 +0200
> From: Jens Schmidt <jschmidt4gnu@vodafonemail.de>
> Cc: 65536@debbugs.gnu.org
>
> On 2023-08-25 17:26, Jens Schmidt wrote:
> > On 2023-08-25 16:18, Eli Zaretskii wrote:
> >>> Date: Fri, 25 Aug 2023 15:16:29 +0200
> >>> From: Jens Schmidt via "Bug reports for GNU Emacs,
> >>> the Swiss army knife of text editors" <bug-gnu-emacs@gnu.org>
> >
> >>> Maybe this should be explicitly documented in its doc string and/or
> >>> the Emacs Lisp manual ((elisp) Search and Replace) so that users of
> >>> the function can rely on that fact?
> >>
> >> Is it important to promise never to clobber match-data in this
> >> function?
> >
> > Not sure whether the following is convincing enough ...
>
> OTOH, I just found the following in the doc string of
> `save-match-data', which means that `replace-regexp-in-string'
> is actually not "convention-conforming":
>
> NOTE: The convention in Elisp is that any function, except for a few
> exceptions like car/assoc/+/goto-char, can clobber the match data,
> so ‘save-match-data’ should normally be used to save *your* match data
> rather than your caller’s match data.
>
> The final decision is yours ...
I think it's okay to leave things as they are.
Stefan, WDYT?