From: Juri Linkov <juri@linkov.net>
To: Davis Herring <herring@lanl.gov>
Cc: Drew Adams <drew.adams@oracle.com>, emacs-devel@gnu.org
Subject: Re: char equivalence classes in search - why not symmetric?
Date: Wed, 02 Sep 2015 01:45:45 +0300 [thread overview]
Message-ID: <87fv2xpxll.fsf@mail.linkov.net> (raw)
In-Reply-To: <55E5F112.3090908@lanl.gov> (Davis Herring's message of "Tue, 01 Sep 2015 12:40:18 -0600")
> I'm sorry: I thought it was obvious. For case folding, there are three
> sets of characters that might be considered a match: [a], [A], and [aA].
> The default Emacs behavior is to make "a" mean [aA] and "A" mean [A].
> For the (relatively rare) case in which [a] is desired, one can turn
> case-fold-search off (e.g., with M-c). Then you gain [a] and lose [aA]
> as a choice (you can't have all three from just two characters!).
Or in a brief table:
‘C-s a’ matches [aA]
‘C-s a M-c’ matches [a]
‘C-s A’ matches [A]
‘C-s A M-c’ matches [aA]
Substituting ‘A’ into ‘ä’ (other equivalent chars omitted for brevity):
‘C-s a’ matches [aä]
‘C-s a M-'’ matches [a]
‘C-s ä’ matches [ä]
‘C-s ä M-'’ matches [aä]
I see no problem implementing the same.
BTW, could this scheme be applied to whitespace matching as well?
‘C-s SPC’ matches [SPC TAB]
‘C-s SPC M-s SPC’ matches [SPC]
‘C-s TAB’ matches [TAB]
‘C-s TAB M-s SPC’ matches [SPC TAB]
> How did that upper-case letter get there? Commands like C-w are careful
> not to add uppercase letters if there aren't already some. So the user
> must have typed it explicitly, and so they were paying attention to case
> and have no need for a case-insensitive search. The only harm is if
> they are inconsistent in their typing -- during something as brief as
> isearch.
Yanking a string with upper-case letters into Isearch does more harm
by converting them into lower-case. I believe yanking a string
should not strip diacritics either.
next prev parent reply other threads:[~2015-09-01 22:45 UTC|newest]
Thread overview: 86+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-09-01 15:46 char equivalence classes in search - why not symmetric? Drew Adams
2015-09-01 15:52 ` Davis Herring
2015-09-01 16:51 ` Stefan Monnier
2015-09-01 17:51 ` Drew Adams
2015-09-01 18:40 ` Davis Herring
2015-09-01 19:09 ` Drew Adams
2015-09-01 22:45 ` Juri Linkov [this message]
2015-09-02 0:33 ` Drew Adams
2015-09-01 20:10 ` Stephen J. Turnbull
2015-09-01 16:16 ` Eli Zaretskii
[not found] ` <<38061f42-eaf1-47c6-b74d-f676ac952b18@default>
[not found] ` <<83r3miatvl.fsf@gnu.org>
[not found] ` <<21998.29683.916211.867479@a1i15.kph.uni-mainz.de>
[not found] ` <<9A972800-D8F0-4DA8-877E-07D5BDC2E1F9@gmail.com>
2015-09-01 17:50 ` Drew Adams
2015-09-01 18:15 ` Eli Zaretskii
2015-09-01 18:46 ` Drew Adams
2015-09-01 19:19 ` Eli Zaretskii
2015-09-01 20:15 ` Drew Adams
2015-09-08 5:36 ` Ulrich Mueller
2015-09-08 6:04 ` Jean-Christophe Helary
2015-09-08 13:31 ` Stephen J. Turnbull
2015-09-08 14:24 ` Drew Adams
2015-09-08 15:21 ` Stephen J. Turnbull
2015-09-08 16:58 ` Drew Adams
2015-09-08 17:38 ` Stephen J. Turnbull
2015-09-09 22:52 ` Drew Adams
2015-09-10 3:12 ` Drew Adams
2015-09-10 21:46 ` Drew Adams
2015-09-08 20:15 ` Richard Stallman
2015-09-08 20:15 ` Richard Stallman
2015-09-08 21:25 ` Drew Adams
2015-09-09 15:07 ` Richard Stallman
2015-09-09 15:21 ` Drew Adams
2015-09-10 2:03 ` Richard Stallman
2015-09-10 3:23 ` Drew Adams
2015-09-11 10:28 ` Richard Stallman
2015-09-11 13:28 ` Stefan Monnier
2015-09-11 16:33 ` Drew Adams
2015-09-11 20:59 ` Juri Linkov
2015-09-11 23:11 ` Drew Adams
2015-09-12 15:28 ` Richard Stallman
2015-09-11 16:31 ` Drew Adams
2015-09-11 10:28 ` Richard Stallman
2015-09-11 16:31 ` Drew Adams
2015-09-12 15:29 ` Richard Stallman
[not found] ` <<8cf269bc-69d8-4752-8506-de8d992512e1@default>
[not found] ` <<E1ZZPIS-0005rf-DJ@fencepost.gnu.org>
2015-09-08 21:46 ` Drew Adams
[not found] ` <<E1ZZPIT-0005s6-ST@fencepost.gnu.org>
[not found] ` <<da54a6cb-90eb-481d-aa20-acfad612e709@default>
[not found] ` <<E1ZZgxz-0006X2-Bg@fencepost.gnu.org>
[not found] ` <<cb107072-7f90-41fb-9aff-075d50eb65bb@default>
[not found] ` <<E1ZZrCm-0001x4-9a@fencepost.gnu.org>
[not found] ` <<4f3b1db3-d3d2-480f-8662-fbf7c74aa67f@default>
[not found] ` <<E1ZaLZR-0002Bf-8q@fencepost.gnu.org>
[not found] ` <<e77f8e7b-581f-436d-816a-c8daed734ff5@default>
[not found] ` <<E1ZamkM-0005d4-RN@fencepost.gnu.org>
2015-09-12 15:59 ` Drew Adams
2015-09-08 13:39 ` Drew Adams
2015-09-08 21:19 ` Juri Linkov
2015-09-09 15:07 ` Richard Stallman
2015-09-08 15:47 ` Eli Zaretskii
2015-09-08 16:57 ` Drew Adams
2015-09-08 21:20 ` Juri Linkov
2015-09-09 2:42 ` Eli Zaretskii
2015-09-09 11:23 ` Artur Malabarba
2015-09-09 13:32 ` Drew Adams
2015-09-09 15:12 ` Richard Stallman
2015-09-11 20:50 ` Juri Linkov
[not found] ` <<CAAdUY-JMQVsRFku8nwX8JcA9k6Y9sHWoVL6ZC60RHnjoj0cd+Q@mail.gmail.com>
[not found] ` <<E1ZZh2a-0003u6-Fj@fencepost.gnu.org>
2015-09-09 15:22 ` Drew Adams
2015-09-10 2:03 ` Richard Stallman
2015-09-10 3:15 ` Drew Adams
2015-09-10 6:57 ` David Kastrup
2015-09-10 15:02 ` Drew Adams
2015-09-10 15:50 ` Richard Stallman
2015-09-08 20:09 ` Richard Stallman
2015-09-08 21:00 ` Drew Adams
2015-09-09 15:06 ` Richard Stallman
2015-09-08 21:47 ` Ulrich Mueller
2015-09-02 15:34 ` Richard Stallman
2015-09-02 15:56 ` Drew Adams
2015-09-02 16:05 ` Eli Zaretskii
2015-09-02 21:51 ` Jean-Christophe Helary
2015-09-02 22:15 ` Drew Adams
2015-09-03 15:37 ` Richard Stallman
2015-09-03 2:41 ` Eli Zaretskii
2015-09-03 3:08 ` Jean-Christophe Helary
2015-09-03 7:28 ` Artur Malabarba
2015-09-03 17:15 ` Drew Adams
2015-09-07 13:52 ` Nix
2015-09-07 17:07 ` Drew Adams
2015-09-07 23:23 ` Nix
2015-09-08 2:17 ` Richard Stallman
2015-09-03 14:33 ` Eli Zaretskii
2015-09-03 15:00 ` Stefan Monnier
2015-09-03 16:15 ` Drew Adams
2015-09-03 16:23 ` Eli Zaretskii
2015-09-03 16:46 ` Drew Adams
2015-09-02 16:10 ` Artur Malabarba
2015-09-03 19:49 ` Pip Cet
[not found] <<2a7b9134-af2a-462d-af6c-d02bad60bbe8@default>
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=87fv2xpxll.fsf@mail.linkov.net \
--to=juri@linkov.net \
--cc=drew.adams@oracle.com \
--cc=emacs-devel@gnu.org \
--cc=herring@lanl.gov \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
Code repositories for project(s) associated with this external index
https://git.savannah.gnu.org/cgit/emacs.git
https://git.savannah.gnu.org/cgit/emacs/org-mode.git
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.