220 37544 <20180328160928.5083219.57460.48482@gmail.com> article Path: news.gmane.org!.POSTED!not-for-mail From: Tony V E Newsgroups: gmane.comp.lang.c++.isocpp.proposals Subject: Re: Re: Unicode support by extending std::locale. Can we make it by 2020? 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[70.50.121.47]) by smtp.gmail.com with ESMTPSA id i137sm2825617ioi.44.2018.03.28.09.09.28 for (version=TLS1 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Wed, 28 Mar 2018 09:09:28 -0700 (PDT) X-Mailer: BlackBerry Email (10.3.3.2205) In-Reply-To: X-Original-Sender: tvaneerd@gmail.com X-Original-Authentication-Results: mx.google.com; dkim=pass header.i=@gmail.com header.s=20161025 header.b=fXfCUh+S; spf=pass (google.com: domain of tvaneerd@gmail.com designates 209.85.220.41 as permitted sender) smtp.mailfrom=tvaneerd@gmail.com; dmarc=pass (p=NONE sp=QUARANTINE dis=NONE) header.from=gmail.com Precedence: list Mailing-list: list std-proposals@isocpp.org; contact std-proposals+owners@isocpp.org List-ID: X-Spam-Checked-In-Group: std-proposals@isocpp.org X-Google-Group-Id: 399137483710 List-Post: , List-Help: , List-Archive: List-Subscribe: , List-Unsubscribe: , Xref: news.gmane.org gmane.comp.lang.c++.isocpp.proposals:37544 Archived-At: =
Yes, we could add this partial level of support.
But there are people currently working on f= ull unicode support. (or 'fuller'. Hard to say if complete support is possi= ble)

So would we want this partial support, that _mig= ht_ make C++20, or full support that will probably make C++23?=
=

= = =
Sent = from my BlackBerry portable Babbage Device
= = =
=
From: =D0=94=D0=B8=D0=BC=D0=B8=D1=82=D1=80=D0=B8=D1=98 =D0=9C=D0=B8= =D1=98=D0=BE=D1=81=D0=BA=D0=B8
Sent: Wednesday, March 28, = 2018 11:42 AM
To: std-proposals@isocpp.org
Re= ply To: std-proposals@isocpp.org
Subject: Re: [std-pro= posals] Re: Unicode support by extending std::locale. Can we make it by 202= 0?

1. For the sake of backward compatibility and easier port= ing, ctype<char32_t> should be provided. For that same reason ICU pro= vides u_islower(), u_isupper(), etc. u_tolower() even if Unicode provides m= ore fine grained character classification.
2. For the more fine gr= ained character classification other facets or free functions may be added.=
3. The simple case transformations are part of UnicodeData.txt an= d are good enough for large number of languages and they will serve the pur= pose.

Sometimes you may even do this:

if (languag= e uses simple case transformations completely) {
  = algorithm that uses
   simple case transformation, shou= ld be faster
  
}
else {
=    use string case
}

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