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On Tue, Dec 4, 2012 at 10:28 AM, spir <denis.spir@gmail.com> wrote:
> Hello,
>
> I'm running into an unexpected issue for the design of a text matching lib,
> which among other weird points is supposed to work with utf8-encoded Unicode
> source

You do not cite UTS 18, so I assume you are not aware of it:
http://www.unicode.org/reports/tr18/

Unicode Technical Standard #18  "Unicode Regular Expressions"
"Summary: This document describes guidelines for how to adapt regular
expression engines to use Unicode."

HTH
P.