GNU bug report logs - #5193
23.1; single-key-description problem

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Message #5 received at submit <at> emacsbugs.donarmstrong.com (full text, mbox):

From: "Drew Adams" <drew.adams <at> oracle.com>
To: <bug-gnu-emacs <at> gnu.org>
Subject: 23.1; single-key-description problem
Date: Sat, 12 Dec 2009 08:03:33 -0800

[Message part 1 (text/plain, inline)]

emacs -Q
 
The character range (128 . 4194303) is bound to `self-insert-command'.
 
(single-key-description 128) gives "\200"
(single-key-description 4194303) gives "\377"
 
However, in the former case, "\200" is a string with one character,
\200. In the latter case, "\377" is a string with four characters, \,
3, 7, and 7.
 
In GNU Emacs 23.1.1 (i386-mingw-nt5.1.2600)
 of 2009-07-29 on SOFT-MJASON
Windowing system distributor `Microsoft Corp.', version 5.1.2600
configured using `configure --with-gcc (4.4)'
 
 

[Message part 2 (text/html, inline)]

Message #8 received at 5193 <at> debbugs.gnu.org (full text, mbox):

From: Lars Magne Ingebrigtsen <larsi <at> gnus.org>
To: "Drew Adams" <drew.adams <at> oracle.com>
Cc: 5193 <at> debbugs.gnu.org
Subject: Re: 23.1; single-key-description problem
Date: Sun, 18 Sep 2011 11:56:23 +0200

"Drew Adams" <drew.adams <at> oracle.com> writes:

> The character range (128 . 4194303) is bound to `self-insert-command'.
>  
> (single-key-description 128) gives "\200"
> (single-key-description 4194303) gives "\377"
>  
> However, in the former case, "\200" is a string with one character,
> \200. In the latter case, "\377" is a string with four characters, \,
> 3, 7, and 7.

Something seems to have changed here:

(single-key-description 128) => "€"
(single-key-description 4194303) => "\301\277"

But it's essentially still the same -- the 128 is a string of one
character, and the other one is a string of 8 characters.

I have no idea whether this is a bug or a feature, though.

-- 
(domestic pets only, the antidote for overdose, milk.)
  bloggy blog http://lars.ingebrigtsen.no/

Message #11 received at 5193 <at> debbugs.gnu.org (full text, mbox):

From: Stefan Monnier <monnier <at> iro.umontreal.ca>
To: Lars Magne Ingebrigtsen <larsi <at> gnus.org>
Cc: 5193 <at> debbugs.gnu.org, Drew Adams <drew.adams <at> oracle.com>
Subject: Re: bug#5193: 23.1; single-key-description problem
Date: Mon, 19 Sep 2011 14:52:09 -0400

>> The character range (128 . 4194303) is bound to `self-insert-command'.
>> (single-key-description 128) gives "\200"
>> (single-key-description 4194303) gives "\377"
>> However, in the former case, "\200" is a string with one character,
>> \200. In the latter case, "\377" is a string with four characters, \,
>> 3, 7, and 7.
> Something seems to have changed here:
> (single-key-description 128) => "€"

This change is just the result of the switch from emacs-mule in
Emacs-22 to emacs-unicode in Emacs≥23 (i.e. 128 doesn't mean the same
char any more).

> (single-key-description 4194303) => "\301\277"
> But it's essentially still the same -- the 128 is a string of one
> character, and the other one is a string of 8 characters.
> I have no idea whether this is a bug or a feature, though.

Showing the internal representation of byte characters is clearly a bug.
I.e. (single-key-description 4194303) could/should return something like
"\377" either as a single char or as 4 chars.


        Stefan

Message #16 received at 5193-done <at> debbugs.gnu.org (full text, mbox):

From: Andreas Schwab <schwab <at> linux-m68k.org>
To: Stefan Monnier <monnier <at> iro.umontreal.ca>
Cc: Lars Magne Ingebrigtsen <larsi <at> gnus.org>, 5193-done <at> debbugs.gnu.org
Subject: Re: bug#5193: 23.1; single-key-description problem
Date: Mon, 19 Sep 2011 23:23:14 +0200

Stefan Monnier <monnier <at> iro.umontreal.ca> writes:

> Showing the internal representation of byte characters is clearly a bug.

Fixed on emacs-23.

> I.e. (single-key-description 4194303) could/should return something like
> "\377" either as a single char or as 4 chars.

The four char form is just the print representation and has nothing to
do with single-key-description.

Andreas.

-- 
Andreas Schwab, schwab <at> linux-m68k.org
GPG Key fingerprint = 58CA 54C7 6D53 942B 1756  01D3 44D5 214B 8276 4ED5
"And now for something completely different."

Message #17 received at 5193-done <at> debbugs.gnu.org (full text, mbox):

From: Stefan Monnier <monnier <at> iro.umontreal.ca>
To: Andreas Schwab <schwab <at> linux-m68k.org>
Cc: Lars Magne Ingebrigtsen <larsi <at> gnus.org>, 5193-done <at> debbugs.gnu.org
Subject: Re: bug#5193: 23.1; single-key-description problem
Date: Mon, 19 Sep 2011 21:39:45 -0400

>> Showing the internal representation of byte characters is clearly a bug.
> Fixed on emacs-23.

Thank you.

>> I.e. (single-key-description 4194303) could/should return something like
>> "\377" either as a single char or as 4 chars.
> The four char form is just the print representation and has nothing to
> do with single-key-description.

I just meant to say that I do not think it would be an error if
single-key-description chose to use the print representation.


        Stefan

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