From: Tassilo Horn <tsdh@gnu.org>
To: Marcin Borkowski <mbork@mbork.pl>
Cc: emacs-devel@gnu.org
Subject: Re: [RFC]: replace-region-contents
Date: Sat, 02 Feb 2019 14:57:52 +0100 [thread overview]
Message-ID: <874l9mwavz.fsf@gnu.org> (raw)
In-Reply-To: <875zu2ttzw.fsf@mbork.pl> (Marcin Borkowski's message of "Sat, 02 Feb 2019 10:33:23 +0100")
Marcin Borkowski <mbork@mbork.pl> writes:
Hi Marcin,
>> --8<---------------cut here---------------start------------->8---
>> ;; in subr-x.el (or wherever you please)
>> (defun replace-region-contents (beg end extract-fn inject-fn)
>> "Replace the region between BEG and END using EXTRACT-FN and INJECT-FN.
>>
>> The current buffer is narrowed to the region between BEG and END,
>> then EXTRACT-FN is called in order to extract some value.
>> Thereafter, INJECT-FN is called with that value in a temporary
>> buffer which it should populate.
>>
>> Finally, the region in the source buffer is replaced with the
>> contents of the temporary buffer prepared by INJECT-FN using
>> `replace-buffer-contents'."
>
> It looks fairly interesting, and I can see quite a few uses for a
> function like this. The docstring doesn't seem to explain a lot to
> me, though. In particular, what are the arguments and return values
> of EXTRACT-FN and INJECT-FN?
EXTRACT-FN has no argument. It's just run in the source buffer.
Whatever it returns is passed as the argument to INJECT-FN which is run
in a temporary, empty buffer and which it should use to prepare the
temporary buffer whose contents will replace the original region in the
source buffer.
Bye,
Tassilo
next prev parent reply other threads:[~2019-02-02 13:57 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-02-01 21:20 [RFC]: replace-region-contents Tassilo Horn
2019-02-02 9:33 ` Marcin Borkowski
2019-02-02 13:57 ` Tassilo Horn [this message]
2019-02-02 15:42 ` Stefan Monnier
2019-02-04 5:23 ` Tassilo Horn
2019-02-05 2:56 ` Stefan Monnier
2019-02-05 5:57 ` Tassilo Horn
2019-02-05 13:21 ` Tassilo Horn
2019-02-05 16:36 ` Eli Zaretskii
2019-02-05 17:19 ` Tassilo Horn
2019-02-06 16:00 ` Eli Zaretskii
2019-02-06 17:02 ` Tassilo Horn
2019-02-06 17:33 ` Eli Zaretskii
2019-02-06 18:07 ` Tassilo Horn
2019-02-08 16:23 ` Tassilo Horn
2019-02-08 16:28 ` Stefan Monnier
2019-02-08 17:17 ` Tassilo Horn
2019-02-08 21:37 ` Eli Zaretskii
2019-02-08 21:53 ` Stefan Monnier
2019-02-08 21:27 ` Eli Zaretskii
2019-02-08 22:03 ` Tassilo Horn
2019-02-08 22:19 ` Eli Zaretskii
2019-02-09 0:00 ` Tassilo Horn
2019-02-09 8:26 ` Eli Zaretskii
2019-02-09 8:52 ` Tassilo Horn
2019-02-05 13:43 ` Stefan Monnier
2019-02-06 8:07 ` Tassilo Horn
2019-02-06 9:55 ` Marcin Borkowski
2019-02-06 11:10 ` Tassilo Horn
2019-02-06 14:09 ` Stefan Monnier
2019-02-05 16:11 ` Eli Zaretskii
2019-02-02 16:17 ` Stefan Monnier
2019-02-03 15:59 ` Eli Zaretskii
2019-02-03 17:05 ` Stefan Monnier
2019-02-03 17:18 ` Eli Zaretskii
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