GNU bug report logs - #4922
<control>

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Package: emacs; Reported by: Per Starbäck <per.starback <at> gmail.com>; Keywords: confirmed; dated Fri, 13 Nov 2009 21:05:06 UTC; Maintainer for emacs is bug-gnu-emacs <at> gnu.org.

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From: Stefan Monnier <monnier <at> iro.umontreal.ca>
To: Lars Magne Ingebrigtsen <larsi <at> gnus.org>
Subject: Re: bug#4922: <control>
Message-ID: <jwvwrd4jpci.fsf-monnier+emacs <at> gnu.org>
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	<m3bouiuskp.fsf <at> stories.gnus.org>
	<E1R5Drp-0004qG-Rj <at> fencepost.gnu.org>
	<m362kqqjc0.fsf <at> stories.gnus.org>
Date: Mon, 19 Sep 2011 15:40:28 -0400
In-Reply-To: <m362kqqjc0.fsf <at> stories.gnus.org> (Lars Magne Ingebrigtsen's
	message of "Sun, 18 Sep 2011 11:40:47 +0200")
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>>> > emacs -q
>>> >   C-x 8 RET < TAB RET
>>> > completes to "<control>" which inserts \237.
>> What _did_ you expect to see? why would you type `<' to begin with?
> If you just type TAB without the <, you also get <control> first.  Which
> doesn't seem very useful, I think.

Maybe it's not very useful (especially since this same name is used for
several characters), but it's what Unicode names characters 0-31 in its
UnicodeData.txt.  Should we really bother to do something special for them?


        Stefan
Information forwarded to bug-gnu-emacs <at> gnu.org:
bug#4922; Package emacs. Full text available.

Message received at 4922 <at> debbugs.gnu.org:


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From: Lars Magne Ingebrigtsen <larsi <at> gnus.org>
To: Eli Zaretskii <eliz <at> gnu.org>
Subject: Re: bug#4922: <control>
In-Reply-To: <E1R5Drp-0004qG-Rj <at> fencepost.gnu.org> (Eli Zaretskii's message of
	"Sun, 18 Sep 2011 05:40:53 -0400")
Date: Sun, 18 Sep 2011 11:40:47 +0200
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Eli Zaretskii <eliz <at> gnu.org> writes:

>> > emacs -q
>> >   C-x 8 RET < TAB RET
>> > completes to "<control>" which inserts \237.
>
> What _did_ you expect to see? why would you type `<' to begin with?

If you just type TAB without the <, you also get <control> first.  Which
doesn't seem very useful, I think.

-- 
(domestic pets only, the antidote for overdose, milk.)
  bloggy blog http://lars.ingebrigtsen.no/
Information forwarded to bug-gnu-emacs <at> gnu.org:
bug#4922; Package emacs. Full text available.

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In-reply-to: <m3bouiuskp.fsf <at> stories.gnus.org> (message from Lars Magne
	Ingebrigtsen on Sun, 18 Sep 2011 11:07:34 +0200)
Subject: Re: bug#4922: <control>
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	<m3bouiuskp.fsf <at> stories.gnus.org>
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> From: Lars Magne Ingebrigtsen <larsi <at> gnus.org>
> Date: Sun, 18 Sep 2011 11:07:34 +0200
> Cc: 4922 <at> debbugs.gnu.org
> 
> Per Starbäck <per.starback <at> gmail.com> writes:
> 
> > emacs -q
> >   C-x 8 RET < TAB RET
> > completes to "<control>" which inserts \237.

What _did_ you expect to see? why would you type `<' to begin with?
Information forwarded to bug-gnu-emacs <at> gnu.org:
bug#4922; Package emacs. Full text available.

Message received at 4922 <at> debbugs.gnu.org:


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To: Per =?iso-8859-1?Q?Starb=E4ck?= <per.starback <at> gmail.com>
Subject: Re: <control>
In-Reply-To: <912155b0911131258l4ca747fak13713f67db6ed60f <at> mail.gmail.com>
	("Per \=\?iso-8859-1\?Q\?Starb\=E4ck\=22's\?\= message of "Fri,
	13 Nov 2009 21:58:57 +0100")
Date: Sun, 18 Sep 2011 11:07:34 +0200
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References: <912155b0911131258l4ca747fak13713f67db6ed60f <at> mail.gmail.com>
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Per Starb=E4ck <per.starback <at> gmail.com> writes:

> emacs -q
>   C-x 8 RET < TAB RET
> completes to "<control>" which inserts \237.
>
> I didn't expect "<control>" to be a valid completion there.
>
> The reason is that control characters have "<control>" in the second fiel=
d in
> admin/unidata/UnicodeData.txt (and \237 is the last such character.
>
> Suggestion: Skip the <control> names in unidata-gen-table.

I can confirm that this problem still exists in Emacs 24.

I looked into fixing it, but the code that converts the UnicodeData.txt
into all the .el files look like black magic to me.  Or rather -- the
code looks straightforward, but it's somewhat unclear how to actually
run the functions.  :-)

For someone who's done it before it's probably a trivial problem to fix.

--=20
(domestic pets only, the antidote for overdose, milk.)
  bloggy blog http://lars.ingebrigtsen.no/
Information forwarded to bug-gnu-emacs <at> gnu.org:
bug#4922; Package emacs. Full text available.
Added tag(s) confirmed. Request was from Lars Magne Ingebrigtsen <larsi <at> gnus.org> to control <at> debbugs.gnu.org. Full text available.

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Message-ID: <912155b0911131258l4ca747fak13713f67db6ed60f <at> mail.gmail.com>
Subject: <control>
From: =?ISO-8859-1?Q?Per_Starb=E4ck?= <per.starback <at> gmail.com>
To: bug-gnu-emacs <at> gnu.org
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emacs -q
  C-x 8 RET < TAB RET
completes to "<control>" which inserts \237.

I didn't expect "<control>" to be a valid completion there.

The reason is that control characters have "<control>" in the second field in
admin/unidata/UnicodeData.txt (and \237 is the last such character.

Suggestion: Skip the <control> names in unidata-gen-table.

When I looked around for this I noticed a very minor thing in
ucs-names in mule-cmds.el.
It says
	      (dotimes-with-progress-reporter (c #xEFFFF)
but I think the limit ought to be #xF0000, which is where Plane 15
starts, since dotimes-with-progress-reporter
has that as an exclusive limit. (In practice it doesn't matter. At
least not for the time being.)
Acknowledgement sent to Per Starbäck <per.starback <at> gmail.com>:
New bug report received and forwarded. Copy sent to Emacs Bugs <bug-gnu-emacs <at> gnu.org>. Full text available.
Report forwarded to bug-submit-list <at> lists.donarmstrong.com, Emacs Bugs <bug-gnu-emacs <at> gnu.org>:
bug#4922; Package emacs. Full text available.
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