Subject: Changes to Unicode UTS #18, Unicode Regular Expressions, level 3 (tailoring) dropped.
From: Tom Honermann (tom_at_[hidden])
Date: 2021-01-22 09:45:04
Thanks to Peter Brett for pointing this out to me the other day. The
latest revision of the Unicode UTS#18
<https://www.unicode.org/reports/tr18/> covering regular expressions has
some significant changes.Â In particular, the level 3 specification
covering tailoring has been dropped.
The current version of the UTS is available at
Diff marks relative to the prior version can be viewed at
These changes appear to have been approved at UTC meeting #162 in May,
2020.Â Minutes are available at
https://www.unicode.org/L2/L2020/20015.htm; search for "UTS #18".Â The
relevant papers covering the changes appear to be:
Feedback on Proposed Update UTS #18, Markus Scherer, 2010-10-08.
* L2/20-017 <http://www.unicode.org/L2/L2020/20017-pubrev.html>,
Comments on Public Review Issues.
o See the link to issue 404
for review, Mark Davis and Andy Heninger, 2019-11-08.
Response to feedback on UTS18, Mark Davis, 2020-01-14.
The upshot for us is that, when we get back around to looking at
std::regex replacements, we won't have to spend time worrying about
support for tailoring.
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