From: Robert Pluim <rpluim@gmail.com>
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: Mon, 27 May 2019 15:49:50 +0200 [thread overview]
Message-ID: <m2ftp09fcx.fsf@gmail.com> (raw)
In-Reply-To: <jwva7f8owp7.fsf-monnier+emacs@gnu.org> (Stefan Monnier's message of "Mon, 27 May 2019 09:32:11 -0400")
>>>>> On Mon, 27 May 2019 09:32:11 -0400, Stefan Monnier <monnier@iro.umontreal.ca> said:
>> If I take a string of say "β", and replace string-as-unibyte with
>> (encode-coding-string 'emacs-internal), `encoded-string-description'
>> prints "#xCE #xB2", which is the correct UTF-8 encoded
>> value. 'raw-text works too. Iʼm certain that there are subtle
>> differences between the two that I donʼt understand.
Stefan> But "β" is not a "STR that is encoded by CODING-SYSTEM", so this output
Stefan> is neither correct nor incorrect in any case.
It matches the current output of encoded-string-description, though.
Stefan> I think the right thing to do here is one of:
Stefan> - signal an error if `str` is multibyte.
Stefan> - signal an error if `str` is multibyte and contains non-byte chars.
Stefan> - if multibyte, encode `str` with `coding-system`.
Stefan> - just don't bother looking at whether `str` is unibyte or not, just
Stefan> pass it as is to `mapconcat`.
Stefan> - just don't bother looking at whether `str` is unibyte or not, just
Stefan> pass it as is to `mapconcat` but in the lambda, do catch the case
Stefan> where `x` is an "eight bit raw-byte char" and if so pass it to
Stefan> multibyte-char-to-unibyte.
Stefan> - ...
Since this is the underlying code that displays the 'buffer code'
section of 'C-u C-x =', I donʼt think barfing on multibyte is the
right thing to do. Nor is passing it on as is.
Stefan> But encoding `str` with any coding system like raw-text or
Stefan> emacs-internal doesn't seem to make much sense.
Then what is the correct way to say 'give me the raw byte version
of this character'? (or maybe we should just let sleeping encodings
lie :-) )
Robert
next prev parent reply other threads:[~2019-05-27 13:49 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 [this message]
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
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
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