220 29344 <3804442.N9iLZUPZCD@tjmaciei-mobl1> article Path: news.gmane.org!.POSTED!not-for-mail From: Thiago Macieira Newsgroups: gmane.comp.lang.c++.isocpp.proposals Subject: Re: Re: std::byte thoughts Date: Wed, 02 Nov 2016 07:10:51 -0700 Lines: 40 Approved: news@gmane.org Message-ID: <3804442.N9iLZUPZCD@tjmaciei-mobl1> References: <7da80620-e4bd-40eb-a4ec-4f3c2dcb2c98@isocpp.org> <2128372.NTAZafObDQ@tjmaciei-mobl1> <2145466f-4680-4489-8728-258fd4374aff@isocpp.org> Reply-To: std-proposals@isocpp.org NNTP-Posting-Host: blaine.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable X-Trace: blaine.gmane.org 1478095886 15655 195.159.176.226 (2 Nov 2016 14:11:26 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Wed, 2 Nov 2016 14:11:26 +0000 (UTC) User-Agent: KMail/5.3.2 (Linux/4.8.4-1-default; KDE/5.27.0; x86_64; ; ) To: std-proposals@isocpp.org Original-X-From: std-proposals+bncBCB4TK757YBRB3XH47AAKGQE57GJPVA@isocpp.org Wed Nov 02 15:11:19 2016 Return-path: Envelope-to: gclcip-std-proposals@m.gmane.org Original-Received: from mail-wm0-f72.google.com ([74.125.82.72]) by blaine.gmane.org with esmtp (Exim 4.84_2) (envelope-from ) id 1c1wFf-0000GN-UH for gclcip-std-proposals@m.gmane.org; Wed, 02 Nov 2016 15:10:51 +0100 Original-Received: by mail-wm0-f72.google.com with SMTP id p190sf13410286wmp.3 for ; Wed, 02 Nov 2016 07:10:55 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=isocpp-org.20150623.gappssmtp.com; s=20150623; h=from:to:subject:date:message-id:user-agent:in-reply-to:references :mime-version:content-transfer-encoding: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=/phJ8jicKvqAeGJJ0MjB/e7NFVNacPpQgFP3DIm4gNs=; b=bpLUaWjkbRJ1Q8rxqva+uN6bEudWo8eEQsjEvfMBK9A7pprnrGPNbYxNgIsWqVfTxg Nr8kA+7TEh+4Yw02O+Jss1DwvZzyULGMw0fQPXJgLY/MJw69RiN3AaPvPW3NuDk9hu8l yVtNIotlM9KAE5eKywdxJYY/WYnNhpJhx+WpBj54SWsSy04IxS8AwpF8/ippAbkjcVrr tnDRJc0w8KXuj3cCKO4BVk2sejtnjAzmknEnkz26+1Cqy2b69uuMZMEZCCxf8lC8Fn02 p3wvZsJloCtZUJ2i9ROsXtdckhCinGuUnlBOT+f69Q6XcoHBZ86OLzswroYzBBIjind8 X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:from:to:subject:date:message-id:user-agent :in-reply-to:references:mime-version:content-transfer-encoding :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=/phJ8jicKvqAeGJJ0MjB/e7NFVNacPpQgFP3DIm4gNs=; b=D5Xm0orGtzWlJNAyzDkT1hYJsNnsHS72AvoROF8bS0jq8l52P1KS3oKWAeENvLBfqe i48zQGXrIAsnhy5fs0O5I2Ws8gTY4J16ZsIsBhpjRl19PQ2LcFjIKNXlkTWCIqMIsB3l cawZ8aPzX3utROvxB31TVRbSr+19mm1wFGkp4O4LA3ldKXcJDD+v4Ihydo5rEw8AZD1l X46kG+Dk/24YsiFROZExNe1jmfmX2ccxSM8hyuefByrtrvBalqLu0Wp8iJ5c2RnmaSn+ W6CKyM7R/Gryy3ZFN7mvAYo25EuvHtysralhDfqF0F3lC2ZJNejvJPJ58vysQ9tFs4qu X-Gm-Message-State: ABUngvd+8ACQ0U2x9rMc+Io5+avfrKwFopVqZRsZjWf4wKlq11eaJbEY9nJRjdQSz8mDtQ== X-Received: by 10.28.215.206 with SMTP id o197mr417315wmg.2.1478095854950; Wed, 02 Nov 2016 07:10:54 -0700 (PDT) X-BeenThere: std-proposals@isocpp.org Original-Received: by 10.28.134.1 with SMTP id i1ls432043wmd.12.gmail; Wed, 02 Nov 2016 07:10:54 -0700 (PDT) X-Received: by 10.194.216.37 with SMTP id on5mr3040856wjc.162.1478095853986; Wed, 02 Nov 2016 07:10:53 -0700 (PDT) Original-Received: from gondolin.macieira.info (gondolin.macieira.info. [78.47.120.188]) by mx.google.com with ESMTP id b3si2744567wjy.202.2016.11.02.07.10.53 for ; Wed, 02 Nov 2016 07:10:53 -0700 (PDT) Received-SPF: pass (google.com: domain of thiago@macieira.org designates 78.47.120.188 as permitted sender) client-ip=78.47.120.188; Original-Received: from tjmaciei-mobl1.localnet (unknown [IPv6:2601:1c0:4501:5f9f:d130:7f7c:ebed:53ad]) by gondolin.macieira.info (Postfix) with ESMTPSA id 8598611B417 for ; Wed, 2 Nov 2016 07:10:53 -0700 (PDT) In-Reply-To: <2145466f-4680-4489-8728-258fd4374aff@isocpp.org> X-Original-Sender: thiago@macieira.org X-Original-Authentication-Results: mx.google.com; spf=pass (google.com: domain of thiago@macieira.org designates 78.47.120.188 as permitted sender) smtp.mailfrom=thiago@macieira.org 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:29344 Archived-At: Em quarta-feira, 2 de novembro de 2016, =C3=A0s 06:55:29 PDT, Nicol Bolas e= screveu: > 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 `unsigne= d > 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`. >=20 > 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). Why do we need: - char - unsigned char - char8_t - byte It seems to me we have one too many. Why do we need four? What are the four= =20 distinction types? --=20 Thiago Macieira - thiago (AT) macieira.info - thiago (AT) kde.org Software Architect - Intel Open Source Technology Center --=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/3804442.N9iLZUPZCD%40tjmaciei-mobl1. .