[pcre-dev] [Bug 1208] Case folding in PCRE

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Author: Philip Hazel
Date:  
To: pcre-dev
Subject: [pcre-dev] [Bug 1208] Case folding in PCRE
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http://bugs.exim.org/show_bug.cgi?id=1208




--- Comment #8 from Philip Hazel <ph10@???> 2012-02-10 12:28:42 ---
On Fri, 10 Feb 2012, Petr Pisar wrote:

> I'm not sure if this is relevant and how Unicode defines it, but Greek has two
> variants of lower-case sigma (σ, ς) while there is only one upper-case Σ. If
> I were a Greek I would like to match bot of them.


This does seem to be covered in the Unicode SpecialCasing document.

> Regarding confusion of average user: Average (non-Greek) user cannot write
> upper-cased Greek letters so he does not need to deal with Greek letters
> either.


Indeed, but one doesn't want to make everybody else spend resources
checking special cases when it is not needed. And likewise one doesn't
want to get non-Germans tangled up with ß and "ss".


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