220 29346 article Path: news.gmane.org!.POSTED!not-for-mail From: Tom Honermann Newsgroups: gmane.comp.lang.c++.isocpp.proposals Subject: Re: Re: std::byte thoughts Date: Wed, 2 Nov 2016 10:18:47 -0400 Lines: 101 Approved: news@gmane.org Message-ID: References: <7da80620-e4bd-40eb-a4ec-4f3c2dcb2c98@isocpp.org> <2128372.NTAZafObDQ@tjmaciei-mobl1> <2145466f-4680-4489-8728-258fd4374aff@isocpp.org> <3804442.N9iLZUPZCD@tjmaciei-mobl1> Reply-To: std-proposals@isocpp.org NNTP-Posting-Host: blaine.gmane.org Mime-Version: 1.0 Content-Type: multipart/alternative; boundary="------------8146AE986B0E1291A31F2AB4" X-Trace: blaine.gmane.org 1478096345 25698 195.159.176.226 (2 Nov 2016 14:19:05 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Wed, 2 Nov 2016 14:19:05 +0000 (UTC) User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.2.0 To: std-proposals@isocpp.org Original-X-From: std-proposals+bncBDBNXSHG6UDBBSHL47AAKGQEM4UBULY@isocpp.org Wed Nov 02 15:19:00 2016 Return-path: Envelope-to: gclcip-std-proposals@m.gmane.org Original-Received: from mail-yw0-f197.google.com ([209.85.161.197]) by blaine.gmane.org with esmtp (Exim 4.84_2) (envelope-from ) id 1c1wNK-0004Bv-Gb for gclcip-std-proposals@m.gmane.org; Wed, 02 Nov 2016 15:18:46 +0100 Original-Received: by mail-yw0-f197.google.com with SMTP id s68sf24483632ywg.7 for ; Wed, 02 Nov 2016 07:18:49 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=isocpp-org.20150623.gappssmtp.com; s=20150623; h=subject:to:references:from:message-id:date:user-agent:mime-version :in-reply-to:x-original-sender:x-original-authentication-results :reply-to:precedence:mailing-list:list-id:x-spam-checked-in-group :list-post:list-help:list-archive:list-subscribe:list-unsubscribe; bh=MMiYntnxpATwSuh0TPBqVCSn4krlbLaX4ZoJ1N5tRgw=; b=kZaJL/OEb1RXo0I4W8dxmfkQ5zOZA78KrPBYvLx5QlRB8dntO8czeAD0qnU1TrBZRW HheJF2WJq6A44JHNueDu57Rmr/FzW/Imz+OFfEhGmmdpKkfpQI1bqZffHMW3xJzy9ijh 5Fh06yQ8W9mO4pesb4Wps6cM+SCnwzqWg5vjJ9g6CaxJgbaoHR+B3orcgx2hNkVv3tUn wYnJVvwuCTTEriZzIcAbP0zVMoGBwzwHQWN6uUAeArFT/BVZPzD9Uppd65efjcph2UIt Arr25d6oru2IuFP5h97fyFTJEyO6c9fOabpoCIafk5mpRf/tEQ9/cDk7oJy7xyehQOGx pyfw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:subject:to:references:from:message-id:date :user-agent:mime-version:in-reply-to:x-original-sender :x-original-authentication-results:reply-to:precedence:mailing-list :list-id:x-spam-checked-in-group:list-post:list-help:list-archive :list-subscribe:list-unsubscribe; bh=MMiYntnxpATwSuh0TPBqVCSn4krlbLaX4ZoJ1N5tRgw=; b=dGXS3lfFUJvs0IqyKwoDgVPDiVl7D8M2KdM7zmIDINbcFXUAD/LA42j/8XY30C/jIz crnLmuPbPc052cF8EJWwxoZ1eRm2U9F6d2DIwKUABeNMbzoAY+0ijF+Igk8M3tllob4r SsSzk+gdJE+bmakzM8AiT6I6X4bw6tMpO+P6dLQBlx+87U1nihC/hoFc/8l5bDjGkJ8j rZj7AQ86yiRttk9YW08Pmjl+Lr5QmvBEWki67TIOQmxOf6x/ZhkhNdLghhigLxZclr2i 44hl4vWNapeG4nOGVn7j/rNE2sbdzVBDDRbOoc/H3YWD67D9v3eyVQKqJMEGLW7jXb/I HhXQ== X-Gm-Message-State: ABUngvdqIeC+VTImEEO03SJQ+Mf0YCTiE6BOFyRQk3fYBhqw6/R/YCB5dVKyzYOaCmmZuA== X-Received: by 10.129.58.12 with SMTP id h12mr922895ywa.160.1478096328885; Wed, 02 Nov 2016 07:18:48 -0700 (PDT) X-BeenThere: std-proposals@isocpp.org Original-Received: by 10.157.41.69 with SMTP id d63ls5281865otb.48.gmail; Wed, 02 Nov 2016 07:18:48 -0700 (PDT) X-Received: by 10.55.6.12 with SMTP id 12mr3281172qkg.182.1478096327962; Wed, 02 Nov 2016 07:18:47 -0700 (PDT) Original-Received: from smtp83.iad3a.emailsrvr.com (smtp83.iad3a.emailsrvr.com. [173.203.187.83]) by mx.google.com with ESMTPS id j44si1328624qtf.139.2016.11.02.07.18.47 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Wed, 02 Nov 2016 07:18:47 -0700 (PDT) Received-SPF: neutral (google.com: 173.203.187.83 is neither permitted nor denied by best guess record for domain of tom@honermann.net) client-ip=173.203.187.83; Original-Received: from smtp3.relay.iad3a.emailsrvr.com (localhost [127.0.0.1]) by smtp3.relay.iad3a.emailsrvr.com (SMTP Server) with ESMTP id 6C1B6250CC for ; Wed, 2 Nov 2016 10:18:47 -0400 (EDT) X-Auth-ID: tom@honermann.net Original-Received: by smtp3.relay.iad3a.emailsrvr.com (Authenticated sender: tom-AT-honermann.net) with ESMTPSA id 5476D250CB for ; Wed, 2 Nov 2016 10:18:47 -0400 (EDT) X-Sender-Id: tom@honermann.net Original-Received: from [192.168.1.16] (pool-71-176-249-9.rcmdva.fios.verizon.net [71.176.249.9]) (using TLSv1.2 with cipher DHE-RSA-AES128-SHA) by 0.0.0.0:587 (trex/5.7.7); Wed, 02 Nov 2016 10:18:47 -0400 In-Reply-To: <3804442.N9iLZUPZCD@tjmaciei-mobl1> X-Original-Sender: tom@honermann.net X-Original-Authentication-Results: mx.google.com; spf=neutral (google.com: 173.203.187.83 is neither permitted nor denied by best guess record for domain of tom@honermann.net) smtp.mailfrom=tom@honermann.net Precedence: list Mailing-list: list std-proposals@isocpp.org; contact std-proposals+owners@isocpp.org List-ID: 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:29346 Archived-At: This is a multi-part message in MIME format. --------------8146AE986B0E1291A31F2AB4 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: quoted-printable On 11/02/2016 10:10 AM, Thiago Macieira wrote: > Em quarta-feira, 2 de novembro de 2016, =C3=A0s 06:55:29 PDT, Nicol Bolas= escreveu: >> You must not do much UTF-8 work. Because `char` can be signed or unsigne= d, >> the only reasonable way to manipulate UTF-8 code units is to use `unsign= ed >> char`. While a signed `char` is required to be able to store UTF-8 code >> units, you don't want to invoke implementation-defined behavior when >> bitshifting signed types. So you have to use `unsigned char`. >> >> So it's hardly unreasonable to pass UTF-8 strings around via `unsigned >> char*`, rather than `char*`. > I didn't respond to that part of the email, about UTF-8, because I though= t we > were getting char8_t (see Tom Honermann's email). I'd like for that to happen, but P0482R0=20 =20 has not yet been presented nor received any discussion. I hope to=20 present/discuss in Issaquah, time permitting. Tom. --=20 You received this message because you are subscribed to the Google Groups "= ISO C++ Standard - Future Proposals" group. To unsubscribe from this group and stop receiving emails from it, send an e= mail to std-proposals+unsubscribe@isocpp.org. To post to this group, send email to std-proposals@isocpp.org. To view this discussion on the web visit https://groups.google.com/a/isocpp= ..org/d/msgid/std-proposals/e48c78ed-3044-ddda-1efe-f7ee0122dad5%40honermann= ..net. --------------8146AE986B0E1291A31F2AB4 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable
On 11/02/2016 10:10 AM, Thiago Macieira wrote:
Em quarta-feira, 2 de novembro de 2016, =C3=A0s 06:55:=
29 PDT, Nicol Bolas escreveu:

You must not do much UTF-8 work. Because `char` can =
be signed or unsigned,
the only reasonable way to manipulate UTF-8 code units is to use `unsigned
char`. While a signed `char` is required to be able to store UTF-8 code
units, you don't want to invoke implementation-defined behavior when
bitshifting signed types. So you have to use `unsigned char`.

So it's hardly unreasonable to pass UTF-8 strings around via `unsigned
char*`, rather than `char*`.

I didn't respond to that part of the email, about UTF-8, because I thought =
we=20
were getting char8_t (see Tom Honermann's email).
I'd like for that to happen, but P0482R0 has not yet been presented nor received any discussion.=C2=A0 I hope to present/discuss in Issaquah, time permitting.

Tom.

--
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To unsubscribe from this group and stop receiving emails from it, send an e= mail to std-proposa= ls+unsubscribe@isocpp.org.
To post to this group, send email to std-proposals@isocpp.org.
To view this discussion on the web visit https://groups.goog= le.com/a/isocpp.org/d/msgid/std-proposals/e48c78ed-3044-ddda-1efe-f7ee0122d= ad5%40honermann.net.
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