From: Eli Zaretskii <eliz@gnu.org>
To: Stefan Monnier <monnier@iro.umontreal.ca>
Cc: emacs-devel@gnu.org
Subject: Re: emacs-26 8f18d12: Improve documentation of decoding into a unibyte buffer
Date: Tue, 28 May 2019 21:58:03 +0300 [thread overview]
Message-ID: <83muj6z9s4.fsf@gnu.org> (raw)
In-Reply-To: <jwv7eaav6d3.fsf-monnier+emacs@gnu.org> (message from Stefan Monnier on Tue, 28 May 2019 13:43:47 -0400)
> From: Stefan Monnier <monnier@iro.umontreal.ca>
> Cc: emacs-devel@gnu.org
> Date: Tue, 28 May 2019 13:43:47 -0400
>
> > (let* ((str1 (string-as-multibyte (string char)))
> > (str2 (string-as-multibyte (string char char)))
>
> Why on earth do we call string-as-multibyte here? AFAIK, the only cases
> where `string` returns a unibyte string is when char <128 (it could make
> sense to also do that for char ≥128 and <160, but we don't seem to do
> that currently) and these are better turned into multibyte via
> string-TO-unibyte (tho here we don't even need that, since the unibyte
> string works just as well for what we do) than string-AS-unibyte.
>
> I think this is an error. The patch below seems in order.
I'm not sure. Be sure to read the comments about the tricky business
of this function, and the method it employs to solve it, and be sure
you understand all of the subtleties there.
> > I didn't think enough about this to figure out if there can be less
> > trivial use cases. If you can describe all the cases where
> > find-coding-systems-string will return a list whose 'car' is
> > 'undecided', my hat off to you.
>
> AFAIK it only happens for pure-ASCII strings.
What is your reasoning?
next prev parent reply other threads:[~2019-05-28 18:58 UTC|newest]
Thread overview: 50+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20190525191039.14136.23307@vcs0.savannah.gnu.org>
[not found] ` <20190525191040.CCD6C207F5@vcs0.savannah.gnu.org>
2019-05-25 19:41 ` [Emacs-diffs] emacs-26 8f18d12: Improve documentation of decoding into a unibyte buffer Stefan Monnier
2019-05-25 19:59 ` Eli Zaretskii
2019-05-25 20:15 ` Eli Zaretskii
2019-05-25 21:11 ` Stefan Monnier
2019-05-25 21:27 ` Stefan Monnier
2019-05-26 2:37 ` Eli Zaretskii
2019-05-27 9:47 ` Robert Pluim
2019-05-27 12:24 ` Stefan Monnier
2019-05-27 13:02 ` Robert Pluim
2019-05-27 13:32 ` Stefan Monnier
2019-05-27 13:49 ` Robert Pluim
2019-05-27 16:53 ` Eli Zaretskii
2019-05-28 6:23 ` Robert Pluim
2019-05-28 14:57 ` Eli Zaretskii
2019-05-28 3:08 ` Stefan Monnier
2019-05-28 4:40 ` Eli Zaretskii
2019-05-28 11:55 ` Stefan Monnier
2019-05-28 15:18 ` Eli Zaretskii
2019-05-28 17:43 ` Stefan Monnier
2019-05-28 18:58 ` Eli Zaretskii [this message]
2019-05-28 19:35 ` Eli Zaretskii
2019-05-28 23:44 ` Stefan Monnier
2019-05-29 14:33 ` Eli Zaretskii
2019-05-27 16:51 ` Eli Zaretskii
2019-05-27 19:17 ` Stefan Monnier
2019-05-28 2:30 ` Eli Zaretskii
2019-05-28 2:56 ` Stefan Monnier
2019-05-28 4:17 ` Eli Zaretskii
2019-05-28 6:21 ` Robert Pluim
2019-05-28 11:53 ` Stefan Monnier
2019-05-28 11:54 ` Stefan Monnier
2019-05-28 15:11 ` Eli Zaretskii
2019-05-28 17:25 ` Stefan Monnier
2019-05-28 18:51 ` Eli Zaretskii
2019-05-28 23:39 ` Stefan Monnier
2019-05-29 2:45 ` Eli Zaretskii
2019-05-29 16:28 ` Stefan Monnier
2019-05-29 18:19 ` Eli Zaretskii
2019-05-29 18:58 ` Stefan Monnier
2019-05-29 19:09 ` Eli Zaretskii
2019-05-29 19:50 ` Stefan Monnier
2019-05-27 16:43 ` Eli Zaretskii
2019-05-27 16:42 ` Eli Zaretskii
2019-05-27 19:13 ` Stefan Monnier
2019-05-27 16:40 ` Eli Zaretskii
2019-05-27 20:17 ` Richard Stallman
2019-05-28 2:36 ` Eli Zaretskii
2019-05-28 7:06 ` Robert Pluim
2019-05-28 14:59 ` Eli Zaretskii
2019-05-28 15:11 ` Robert Pluim
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=83muj6z9s4.fsf@gnu.org \
--to=eliz@gnu.org \
--cc=emacs-devel@gnu.org \
--cc=monnier@iro.umontreal.ca \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
Code repositories for project(s) associated with this external index
https://git.savannah.gnu.org/cgit/emacs.git
https://git.savannah.gnu.org/cgit/emacs/org-mode.git
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.