220 29331 article Path: news.gmane.org!.POSTED!not-for-mail From: Nicol Bolas Newsgroups: gmane.comp.lang.c++.isocpp.proposals Subject: Re: Re: std::byte thoughts Date: Tue, 1 Nov 2016 20:10:28 -0700 (PDT) Lines: 91 Approved: news@gmane.org Message-ID: References: <7da80620-e4bd-40eb-a4ec-4f3c2dcb2c98@isocpp.org> <004be1ec-6455-4844-b704-7961ea745773@isocpp.org> <1549171.TC16PSHVVd@tjmaciei-mobl1> Reply-To: std-proposals@isocpp.org NNTP-Posting-Host: blaine.gmane.org Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="----=_Part_3054_1783250140.1478056228810" X-Trace: blaine.gmane.org 1478056251 5118 195.159.176.226 (2 Nov 2016 03:10:51 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Wed, 2 Nov 2016 03:10:51 +0000 (UTC) To: ISO C++ Standard - Future Proposals Original-X-From: std-proposals+bncBCEKFTV6ZUMBBJNS4XAAKGQEEI77PFQ@isocpp.org Wed Nov 02 04:10:46 2016 Return-path: Envelope-to: gclcip-std-proposals@m.gmane.org Original-Received: from mail-pa0-f71.google.com ([209.85.220.71]) by blaine.gmane.org with esmtp (Exim 4.84_2) (envelope-from ) id 1c1lwZ-0006qQ-P9 for gclcip-std-proposals@m.gmane.org; Wed, 02 Nov 2016 04:10:27 +0100 Original-Received: by mail-pa0-f71.google.com with SMTP id uc5sf1640545pab.4 for ; Tue, 01 Nov 2016 20:10:30 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=isocpp-org.20150623.gappssmtp.com; s=20150623; h=date:from:to:message-id:in-reply-to:references:subject:mime-version :x-original-sender:reply-to:precedence:mailing-list:list-id :x-spam-checked-in-group:list-post:list-help:list-archive :list-subscribe:list-unsubscribe; bh=o2UE/K60yWrsGCYr8Vy6g7WI+z6hMkJ9Q4ljVmr+EuY=; b=AGctJn6EhGncxF+xq4CoL231CeMs8VOog2VeU9AdZIsWJfE9BDJNVDuH2HQTnQGQgD A7UFOPZCMo5oSJVvoq0l5lYSvpGuJOAaxtK+PdKTeId5ju1barcymtc8P4xzPiHdCrLz ec0jv8+mCVbbHEgnxhL8/TVH/VsEAC/R4OF1MEn0SV3SZv6pogn1p+SwGiXrvS0/EmoN PFHfpePjmacnCKVkopzusmUJZfiZQrnnyj84TtPGKuDuGy3vZydn8DjntSA56lkFTsI6 W3wIMa6+NFYVewS2FuTlQQooDhA50zpPDCtZRtmtjpT/OgENkTn6LCF34stnS3MkwkVl TkzA== DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=date:from:to:message-id:in-reply-to:references:subject:mime-version :x-original-sender:reply-to:precedence:mailing-list:list-id :x-spam-checked-in-group:list-post:list-help:list-archive :list-subscribe:list-unsubscribe; bh=o2UE/K60yWrsGCYr8Vy6g7WI+z6hMkJ9Q4ljVmr+EuY=; b=pARsV53OunzdeQIv/55+yICag4un8IZODmgwgeFALx/Pd9YC/grreytDCYrpFxo7gC S12ePgQHmbg1eTdihgjh0hCGKaofyYrUtBoYKyoguGX2r4peTT+Cus+k4weTK78iGbiX wbEcvqDCZHZl5S9wxAvcH9gKa4YOSOIF+xR/Jh1jbd0xSCglavaV09YzC0W9eRYMZn7B y1ixbgD15Na9jOP0zulryGy/vQTt5tRfwaVCayvur5H2oSC7pcWk/dAGyJQJd12/p/3d ayL/D7oUrUMlI/4f7p3bOliQoKYZ2lzq1lpL83wd0ty+fupGG1xWb4GSLjYxYVP1L0bI NwLg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:date:from:to:message-id:in-reply-to:references :subject:mime-version:x-original-sender:reply-to:precedence :mailing-list:list-id:x-spam-checked-in-group:list-post:list-help :list-archive:list-subscribe:list-unsubscribe; bh=o2UE/K60yWrsGCYr8Vy6g7WI+z6hMkJ9Q4ljVmr+EuY=; b=eR2WD26J9u2ir/yHLnNrXcf6OJ+J5cqimhF7iC/hQ4v28rnjUoLQF19LHCC6W5CxZ4 1o+AYTj1BwTH055+R+uUv1P7vUGFYjnWSZpTU8WHbRFyrk7ijAmcLyK3hISLe34y0VjN c72q0zjwg47hWDGYfDyhPNb2w0FADLB+c83XpUBDPhOW3UsfdelfIks0mslyMaMjIY2Y gZ4ru9tu0X3Fx0YqlLRc+lx7bR2kiY8HvinJrCJpwtz1ThZO468WTkACLI0yDOiE8w25 Fb803MG5lLbfwGSaSc7+1STJw9GBrD5sz4tDKuAc9GN92DxZX3u8QTlBjZxwJ2nG+ErL b+0Q== X-Gm-Message-State: ABUngvcfiIz1vL7Qp9MwvsdQUbXwjZGkzazsWAiiHzjNL95AWuy2KpynoD7WBI1PYTAK6w== X-Received: by 10.98.43.20 with SMTP id r20mr360044pfr.35.1478056230160; Tue, 01 Nov 2016 20:10:30 -0700 (PDT) X-BeenThere: std-proposals@isocpp.org Original-Received: by 10.157.14.129 with SMTP id 1ls10811466otj.31.gmail; Tue, 01 Nov 2016 20:10:29 -0700 (PDT) X-Received: by 10.157.15.143 with SMTP id d15mr18593otd.2.1478056229326; Tue, 01 Nov 2016 20:10:29 -0700 (PDT) In-Reply-To: <1549171.TC16PSHVVd@tjmaciei-mobl1> X-Original-Sender: jmckesson@gmail.com 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:29331 Archived-At: ------=_Part_3054_1783250140.1478056228810 Content-Type: multipart/alternative; boundary="----=_Part_3055_1705258446.1478056228810" ------=_Part_3055_1705258446.1478056228810 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable On Tuesday, November 1, 2016 at 9:21:27 PM UTC-4, Thiago Macieira wrote: > > Em ter=C3=A7a-feira, 1 de novembro de 2016, =C3=A0s 21:28:21 PDT, Dejan= =20 > Milosavljevic=20 > escreveu:=20 > > In there is uint8_t.=20 > > So far it is optional.=20 > > In GCC and MSVS this type exists.=20 > > Bytes don't have to be 8 bits.=20 > > Note that we don't strictly need the typedef. It's just a convenience so= =20 > that=20 > you don't see "char" and get confused. > Actually, no. `std::byte` as proposed by P0298 is explicitly *not* a=20 typedef. It is a scoped enumeration whose underlying type is `unsigned=20 char`, but it is not a typedef. Granted, I can't agree with that design decision. I would much rather it be= =20 a genuine type, rather than using C++ enum chicanery to get strong aliases. --=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/d3d99972-8135-44d0-9674-69d94141d0fb%40isocpp.or= g. ------=_Part_3055_1705258446.1478056228810 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable


On Tuesday, November 1, 2016 at 9:21:27 PM UTC-4, = Thiago Macieira wrote:
Em ter= =C3=A7a-feira, 1 de novembro de 2016, =C3=A0s 21:28:21 PDT, Dejan Milosavlj= evic=20
escreveu:
> In <cstdint> there is uint8_t.
> So far it is optional.
> In GCC and MSVS this type exists.

Bytes don't have to be 8 bits.

Note that we don't strictly need the typedef. It's just a conve= nience so that=20
you don't see "char" and get confused.

Actually, no. `std::byte` as proposed by P0298 is explicitly not<= /i> a typedef. It is a scoped enumeration whose underlying type is `unsigne= d char`, but it is not a typedef.

Granted, I can't agree with th= at design decision. I would much rather it be a genuine type, rather than u= sing C++ enum chicanery to get strong aliases.

--
You received this message because you are subscribed to the Google Groups &= quot;ISO C++ Standard - Future Proposals" group.
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.google.= com/a/isocpp.org/d/msgid/std-proposals/d3d99972-8135-44d0-9674-69d94141d0fb= %40isocpp.org.
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