GNU bug report logs - #52459
28.0.90; prin1-to-string does not escape bidi control characters despite print-escape-control-characters=t

Previous Next

Full log

View this message in rfc822 format

From: Daniel Mendler <mail <at> daniel-mendler.de>
To: Dmitry Gutov <dgutov <at> yandex.ru>, Eli Zaretskii <eliz <at> gnu.org>
Cc: 52459 <at> debbugs.gnu.org
Subject: bug#52459: 28.0.90; prin1-to-string does not escape bidi control characters despite print-escape-control-characters=t
Date: Tue, 14 Dec 2021 19:32:47 +0100

On 12/14/21 7:23 PM, Dmitry Gutov wrote:
> I just did a little testing, and it seems 
> 'print-escape-control-characters' only affects 'prin1-to-string' and 
> 'prin1' but not 'message' or 'format'.

No, `print-escape-multibyte` also applies to `format  and `message`. Try
the following:

(let ((print-escape-multibyte t))
  (format "%S" bidi-directional-controls-chars)
  (message "%S" bidi-directional-controls-chars))

Anyway Eli's criticism does not apply to my proposal of the addition of
such a configuration variable. The variable would have the same scope as
`print-escape-multiple` and the other `print-escape-*` variables. My
proposal does not introduce an inconsistency or any other kind of
incoherence.

> Is that a problem?
> 
> If not, adding a new variable which makes the same distinction seems 
> consistent with the current design.

Exactly. My proposal is consistent with the current design.

Daniel

Previous Next

GNU bug tracking system
Copyright (C) 1999 Darren O. Benham, 1997,2003 nCipher Corporation Ltd, 1994-97 Ian Jackson.