GNU bug report logs - #23833
24.5; assoc-string with CASE-FOLD may fail

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From: help-debbugs <at> gnu.org (GNU bug Tracking System)
To: ynyaaa <at> gmail.com
Subject: bug#23833: closed (Re: bug#23833: 24.5; assoc-string with
 CASE-FOLD may fail)
Date: Thu, 23 Jun 2016 15:13:02 +0000

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

Your bug report

#23833: 24.5; assoc-string with CASE-FOLD may fail

which was filed against the emacs package, has been closed.

The explanation is attached below, along with your original report.
If you require more details, please reply to 23833 <at> debbugs.gnu.org.

-- 
23833: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=23833
GNU Bug Tracking System
Contact help-debbugs <at> gnu.org with problems

[Message part 2 (message/rfc822, inline)]

From: Eli Zaretskii <eliz <at> gnu.org>
To: Noam Postavsky <npostavs <at> users.sourceforge.net>
Cc: ynyaaa <at> gmail.com, 23833-done <at> debbugs.gnu.org
Subject: Re: bug#23833: 24.5; assoc-string with CASE-FOLD may fail
Date: Thu, 23 Jun 2016 18:11:34 +0300

> From: Noam Postavsky <npostavs <at> users.sourceforge.net>
> Date: Thu, 23 Jun 2016 08:26:22 -0400
> Cc: 23833 <at> debbugs.gnu.org
> 
> assoc-string uses compare-strings, which uses upcase to ignore case,
> but upcase is not always the inverse of downcase:
> 
> (upcase (downcase "DZ")) ;=> "Dz"
> ;; Or to put it another way
> (= (upcase (downcase ?\u01F1)) ?\u01F2) ;=> t
> 
> Same behaviour seen in emacs-25 and master

Thanks.

This is a documentation issue: both 'assoc-string' and
'compare-strings' had inaccuracies in their doc strings.  I fixed this
on the emacs-25 branch, and I'm marking this bug done.

[Message part 3 (message/rfc822, inline)]

From: ynyaaa <at> gmail.com
To: bug-gnu-emacs <at> gnu.org
Subject: 24.5; assoc-string with CASE-FOLD may fail
Date: Thu, 23 Jun 2016 21:01:03 +0900

`assoc-string' called with non-nil CASE-FOLD argument may fail to match
with downcased key.

(let (l)
  (dotimes (c (max-char))
    (or (let ((s (string c)))
          (assoc-string (downcase s) (list s) t))
        (setq l (cons c l))))
  l)
=>(497 458 455 452)



In GNU Emacs 24.5.1 (i686-pc-mingw32)
 of 2015-04-11 on LEG570
Windowing system distributor `Microsoft Corp.', version 6.0.6002
Configured using:
 `configure --prefix=/c/usr --host=i686-pc-mingw32'

Important settings:
  value of $LANG: JPN
  locale-coding-system: cp932

Major mode: Lisp Interaction

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  font-lock-mode: t
  blink-cursor-mode: t
  auto-composition-mode: t
  auto-encryption-mode: t
  auto-compression-mode: t
  line-number-mode: t
  transient-mark-mode: t

Recent messages:

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Memory information:
((conses 8 76911 6828)
 (symbols 32 17601 0)
 (miscs 32 34 127)
 (strings 16 11124 3996)
 (string-bytes 1 279109)
 (vectors 8 10463)
 (vector-slots 4 464483 4962)
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