220 33747 article Path: news.gmane.org!.POSTED!not-for-mail From: Tony V E Newsgroups: gmane.comp.lang.c++.isocpp.proposals Subject: Re: Re: A more advanced switch Date: Wed, 9 Aug 2017 16:37:09 -0400 Lines: 89 Approved: news@gmane.org Message-ID: References: <41733595.o4GQ0c89LU@tjmaciei-mobl1> <1532678.cu6QfydWbQ@tjmaciei-mobl1> Reply-To: std-proposals@isocpp.org NNTP-Posting-Host: blaine.gmane.org Mime-Version: 1.0 Content-Type: multipart/alternative; boundary="001a114cb1b84e36da0556580b0c" X-Trace: blaine.gmane.org 1502311035 32196 195.159.176.226 (9 Aug 2017 20:37:15 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Wed, 9 Aug 2017 20:37:15 +0000 (UTC) To: Standard Proposals Original-X-From: std-proposals+bncBCUZ5QWKNQIPNZFNZQCRUBDWEXBOQ@isocpp.org Wed Aug 09 22:37:08 2017 Return-path: Envelope-to: gclcip-std-proposals@m.gmane.org Original-Received: from mail-pg0-f72.google.com ([74.125.83.72]) by blaine.gmane.org with esmtp (Exim 4.84_2) (envelope-from ) id 1dfXiz-0007wX-Qr for gclcip-std-proposals@m.gmane.org; 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[2607:f8b0:400d:c09::233]) by mx.google.com with ESMTPS id o31si4119451qko.202.2017.08.09.13.37.10 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Wed, 09 Aug 2017 13:37:10 -0700 (PDT) Received-SPF: pass (google.com: domain of tvaneerd@gmail.com designates 2607:f8b0:400d:c09::233 as permitted sender) client-ip=2607:f8b0:400d:c09::233; Original-Received: by mail-qk0-x233.google.com with SMTP id z18so42607877qka.4 for ; Wed, 09 Aug 2017 13:37:10 -0700 (PDT) X-Received: by 10.55.93.197 with SMTP id r188mr11922923qkb.277.1502311030336; Wed, 09 Aug 2017 13:37:10 -0700 (PDT) Original-Received: by 10.237.42.10 with HTTP; Wed, 9 Aug 2017 13:37:09 -0700 (PDT) In-Reply-To: <1532678.cu6QfydWbQ@tjmaciei-mobl1> X-Original-Sender: tvaneerd@gmail.com X-Original-Authentication-Results: mx.google.com; dkim=pass header.i=@gmail.com header.s=20161025 header.b=AuK6q3qj; spf=pass (google.com: domain of tvaneerd@gmail.com designates 2607:f8b0:400d:c09::233 as permitted sender) smtp.mailfrom=tvaneerd@gmail.com; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=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:33747 Archived-At: --001a114cb1b84e36da0556580b0c Content-Type: text/plain; charset="UTF-8" On Wed, Aug 9, 2017 at 4:29 PM, Thiago Macieira wrote: > On quarta-feira, 9 de agosto de 2017 13:17:07 PDT Tony V E wrote: > > yep, basically. > > > > Once upon a time some compiler compiled that, and I agree, I wouldn't > > guarantee what it returned. > > (I think the idea was that hitting the "A" case was an optimization, and > > case default was to do a strcmp()) > > Like multicharacter literals? > int v = 'abcd'; > > GCC and ICC warn about that by default. Clang only warns at -Wpedantic. > MSVC > does not warn even at -W4. > > No really, case "a literal string": It was the wild west of compiling, before even C was a standard. So really, maybe this isn't pertinent information to the current discussion, but it has been stuck in my head all these years. -- Be seeing you, Tony -- 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 email 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/CAOHCbitVe3%2BTZNqcdSyhORbjxABddavdZ5EGyi4zcO025t%2BcjQ%40mail.gmail.com. --001a114cb1b84e36da0556580b0c Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable


On Wed, Aug 9, 2017 at 4:29 PM, Thiago Macieira <<= a href=3D"mailto:thiago@macieira.org" target=3D"_blank">thiago@macieira.org= > wrote:
O= n quarta-feira, 9 de agosto de 2017 13:17:07 PDT Tony V E wrote:
> yep, basically.
>
> Once upon a time some compiler compiled that, and I agree, I wouldn= 9;t
> guarantee what it returned.
> (I think the idea was that hitting the "A" case was an optim= ization, and
> case default was to do a strcmp())

Like multicharacter literals?
=C2=A0 =C2=A0 =C2=A0 =C2=A0 int v =3D 'abcd';

GCC and ICC warn about that by default. Clang only warns at -Wpedantic. MSV= C
does not warn even at -W4.


No really, cas= e "a literal string":
It was the wild west of comp= iling, before even C was a standard.

So re= ally, maybe this isn't pertinent information to the current discussion,= but it has been stuck in my head all these years.
--
Be seeing you,
Tony

--
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