GNU bug report logs - #57325
27.1; functions in ff-other-file-alist

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Message #26 received at 57325 <at> debbugs.gnu.org (full text, mbox):

From: Felician Nemeth <felician.nemeth <at> gmail.com>
To: Eli Zaretskii <eliz <at> gnu.org>
Cc: 57325 <at> debbugs.gnu.org
Subject: Re: bug#57325: 27.1; functions in ff-other-file-alist
Date: Mon, 29 Aug 2022 16:27:13 +0200

>> Also, when the function returns an absolute file name, then the
>> returned file should be already opened, otherwise ff-find-other-file
>> cannot find it.
>
> Hmm... not sure how this is relevant.  The function should return a
> list of extensions, not a file name.  What am I missing?

In my case, the related file of foo.toml is bar.json.  From an extension
it is not possible to guess whether the related file is bar.json or
baz.json.  find-file.el of Emacs 27.1 has this in the Commentary
section:

;; These functions must return a list consisting of the possible names of the
;; corresponding file, with or without path.

That's why I thought my function could return an absolute file name.

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