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From: "Eli Zaretskii" <eliz@is.elta.co.il>
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Subject: Re: regex and case-fold-search problem
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> From: Kenichi Handa <handa@etl.go.jp>
> Date: Fri, 23 Aug 2002 15:25:42 +0900 (JST)
> 
> This problem is not specific to non-ASCII chars, it's just
> rarer to face such a sitution in ASCII chars.
> 
> (let ((case-fold-search nil))
>   (string-match "[A-_]" "A")) => 0
> (let ((case-fold-search t))
>   (string-match "[A-_]" "A")) => nil
> (let ((case-fold-search t))
>   (string-match "[A_]" "A")) => 0

Does that happen because under case-fold-search non-nil the
characters on the range specification are downcased?

> In my opinion, specifying ranges by chars are nonsense
> because there should be no semantics in the order of
> characters codes.

Sorry, I don't understand: how would one specify a range _except_
with two characters and a dash between them?  What am I missing?