* bug#42384: octal escape sequences old fashioned
@ 2020-07-16 0:50 積丹尼 Dan Jacobson
2020-07-16 16:14 ` Robert Pluim
2020-07-16 16:42 ` Eli Zaretskii
0 siblings, 2 replies; 5+ messages in thread
From: 積丹尼 Dan Jacobson @ 2020-07-16 0:50 UTC (permalink / raw)
To: 42384; +Cc: rms
(info "(emacs) Text Display") says:
The raw bytes with codes ‘U+0080’ (octal 200) through ‘U+009F’ (octal
237) are displayed as “octal escape sequences”, with the ‘escape-glyph’
face. For instance, character code ‘U+0098’ (octal 230) is displayed as
‘\230’. If you change the buffer-local variable ‘ctl-arrow’ to ‘nil’,
the ASCII control characters are also displayed as octal escape
sequences instead of caret escape sequences.
OK but octal is rather old fashioned so the user should be given the
choice of hex, etc.
emacs-version "26.3"
^ permalink raw reply [flat|nested] 5+ messages in thread* bug#42384: octal escape sequences old fashioned
2020-07-16 0:50 bug#42384: octal escape sequences old fashioned 積丹尼 Dan Jacobson
@ 2020-07-16 16:14 ` Robert Pluim
2020-07-16 16:42 ` Eli Zaretskii
1 sibling, 0 replies; 5+ messages in thread
From: Robert Pluim @ 2020-07-16 16:14 UTC (permalink / raw)
To: 積丹尼 Dan Jacobson; +Cc: 42384, rms
>>>>> On Thu, 16 Jul 2020 08:50:28 +0800, 積丹尼 Dan Jacobson <jidanni@jidanni.org> said:
積丹尼> (info "(emacs) Text Display") says:
積丹尼> The raw bytes with codes ‘U+0080’ (octal 200) through ‘U+009F’ (octal
積丹尼> 237) are displayed as “octal escape sequences”, with the ‘escape-glyph’
積丹尼> face. For instance, character code ‘U+0098’ (octal 230) is displayed as
積丹尼> ‘\230’. If you change the buffer-local variable ‘ctl-arrow’ to ‘nil’,
積丹尼> the ASCII control characters are also displayed as octal escape
積丹尼> sequences instead of caret escape sequences.
積丹尼> OK but octal is rather old fashioned so the user should be given the
積丹尼> choice of hex, etc.
display-raw-bytes-as-hex is a variable defined in `C source code'.
Its value is t
Original value was nil
You can customize this variable.
This variable was introduced, or its default value was changed, in
version 26.1 of Emacs.
Probably introduced at or before Emacs version 26.1.
Documentation:
Non-nil means display raw bytes in hexadecimal format.
The default is to use octal format (200) whereas hexadecimal (x80)
may be more familiar to users.
(the manual in emacs-27 mentions this)
Robert
^ permalink raw reply [flat|nested] 5+ messages in thread* bug#42384: octal escape sequences old fashioned
2020-07-16 0:50 bug#42384: octal escape sequences old fashioned 積丹尼 Dan Jacobson
2020-07-16 16:14 ` Robert Pluim
@ 2020-07-16 16:42 ` Eli Zaretskii
2020-07-16 18:16 ` 積丹尼 Dan Jacobson
1 sibling, 1 reply; 5+ messages in thread
From: Eli Zaretskii @ 2020-07-16 16:42 UTC (permalink / raw)
To: 積丹尼 Dan Jacobson; +Cc: 42384, rms
> From: 積丹尼 Dan Jacobson
> <jidanni@jidanni.org>
> Date: Thu, 16 Jul 2020 08:50:28 +0800
> Cc: rms@gnu.org
>
> (info "(emacs) Text Display") says:
>
> The raw bytes with codes ‘U+0080’ (octal 200) through ‘U+009F’ (octal
> 237) are displayed as “octal escape sequences”, with the ‘escape-glyph’
> face. For instance, character code ‘U+0098’ (octal 230) is displayed as
> ‘\230’. If you change the buffer-local variable ‘ctl-arrow’ to ‘nil’,
> the ASCII control characters are also displayed as octal escape
> sequences instead of caret escape sequences.
>
> OK but octal is rather old fashioned so the user should be given the
> choice of hex, etc.
We have display-raw-bytes-as-hex for that very reason.
^ permalink raw reply [flat|nested] 5+ messages in thread
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2020-07-16 0:50 bug#42384: octal escape sequences old fashioned 積丹尼 Dan Jacobson
2020-07-16 16:14 ` Robert Pluim
2020-07-16 16:42 ` Eli Zaretskii
2020-07-16 18:16 ` 積丹尼 Dan Jacobson
2020-07-17 14:42 ` Eli Zaretskii
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