220 24316 <527A609D-8ACD-4C41-8AA2-4AC22BA0FE8C@gmail.com> article Path: news.gmane.org!not-for-mail From: David Krauss Newsgroups: gmane.comp.lang.c++.isocpp.proposals Subject: Re: variant construction/assignment from braced value Date: Thu, 11 Feb 2016 17:54:14 +0800 Lines: 106 Approved: news@gmane.org Message-ID: <527A609D-8ACD-4C41-8AA2-4AC22BA0FE8C@gmail.com> References: <9A41B088-08C0-4222-8558-FA734F61BDE5@gmail.com> <56BC51E9.10200@cern.ch> Reply-To: std-proposals@isocpp.org NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 (Mac OS X Mail 9.1 \(3096.5\)) Content-Type: multipart/alternative; boundary="Apple-Mail=_8938B3E1-FEEA-4978-AEDB-89E5358AF857" X-Trace: ger.gmane.org 1455184466 15374 80.91.229.3 (11 Feb 2016 09:54:26 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Thu, 11 Feb 2016 09:54:26 +0000 (UTC) Cc: =?utf-8?Q?Agust=C3=ADn_K-ballo_Berg=C3=A9?= , ISO C++ Standard - Future Proposals To: Axel Naumann Original-X-From: std-proposals+bncBCW25A7E3QCRBS5U6G2QKGQE6UTEFHA@isocpp.org Thu Feb 11 10:54:21 2016 Return-path: Envelope-to: gclcip-std-proposals@m.gmane.org Original-Received: from mail-yk0-f197.google.com ([209.85.160.197]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1aTnx6-00027d-Kj for gclcip-std-proposals@m.gmane.org; Thu, 11 Feb 2016 10:54:20 +0100 Original-Received: by mail-yk0-f197.google.com with SMTP id z7sf68836128yka.2 for ; Thu, 11 Feb 2016 01:54:20 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=isocpp-org.20150623.gappssmtp.com; s=20150623; h=content-type:mime-version:subject:from:in-reply-to:date:cc :message-id:references: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=ThxN3tjwAZw9fWHqGjlGgqeIzsCrG6Jgw/kahuuUJOU=; b=E0iAJSjsd868syKu5Y9rs0MneI4Ovon0/ajgbY7gSjKo6yaiI0+9q3fGHxmPyzTfxi L1DXlo1Yg3Ncqg45JZgu4RtNq0hOPVD0i0DZgHFiCwsBczS/UUZJBnresfLpbdAIO+pg 6Rgl2KLNBEEVCB2yce9cvan398D4Ahw45P0GyC60wAFkCxGSFwwxO0GLf//pJT4MKlhZ 6P8tshkmw51OC9O3ge1xqAoDbRaFh7m8IguesVu/NaMPxhWk9zudbFtOyX+HMTt5akoT tzSzLo/1BY9RiRsjZXoMSnE3kVSxEpj/f6LEVk7VhLbHwD3PhG3etJ/fC9mBKyrX/nR2 XzdA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:content-type:mime-version:subject:from :in-reply-to:date:cc:message-id:references: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=ThxN3tjwAZw9fWHqGjlGgqeIzsCrG6Jgw/kahuuUJOU=; b=DPk6v4MtabBw5xl3mk0agCPcW8/9J/NSxtMg7/5EOlLm7JWfYtEkHMTEQvklKB6VL3 8ZzjjP6pZVOHuk7ecE+r6me0RPYfpKSgpDduz9n4XY04BecdTFp1PycaNqW1LdmUpijy Y03/YVq26CYr76jGS/Qmw+034krTVIy6+K/elAw+c8+KdAL8FrvFBbXlNLTfYCMa15We F+aVJxETxJgDv6irHiUud+7goSz8E5F9B5IpDGIu1Y1zf+xsX/MyJIebfrH0kEfgFJKs n/mm8LN0XOwTZFfcxD8clqmOR+o//YeCYoTLmzxhP3sWmsZRNY1Q2V0uGSfPu5yfNxjN omlw== X-Gm-Message-State: AG10YOQP/wQJpyxSkPcxoi/HA5ABRngbdz5rA3CMsbc6yXbvnAf7J3r0twM5lkxUf2CONA== X-Received: by 10.129.109.197 with SMTP id i188mr40506601ywc.8.1455184459768; Thu, 11 Feb 2016 01:54:19 -0800 (PST) X-BeenThere: std-proposals@isocpp.org Original-Received: by 10.107.129.9 with SMTP id c9ls465647iod.26.gmail; Thu, 11 Feb 2016 01:54:18 -0800 (PST) X-Received: by 10.98.70.28 with SMTP id t28mr34952922pfa.110.1455184458836; Thu, 11 Feb 2016 01:54:18 -0800 (PST) Original-Received: from mail-pa0-x22e.google.com (mail-pa0-x22e.google.com. [2607:f8b0:400e:c03::22e]) by mx.google.com with ESMTPS id g14si11580899pfd.189.2016.02.11.01.54.18 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Thu, 11 Feb 2016 01:54:18 -0800 (PST) Received-SPF: pass (google.com: domain of potswa@gmail.com designates 2607:f8b0:400e:c03::22e as permitted sender) client-ip=2607:f8b0:400e:c03::22e; Original-Received: by mail-pa0-x22e.google.com with SMTP id yy13so26465894pab.3 for ; Thu, 11 Feb 2016 01:54:18 -0800 (PST) X-Received: by 10.66.254.99 with SMTP id ah3mr7542716pad.134.1455184458743; Thu, 11 Feb 2016 01:54:18 -0800 (PST) Original-Received: from [172.20.10.2] ([121.54.54.52]) by smtp.gmail.com with ESMTPSA id u84sm10974934pfa.57.2016.02.11.01.54.16 (version=TLSv1/SSLv3 cipher=OTHER); Thu, 11 Feb 2016 01:54:18 -0800 (PST) In-Reply-To: <56BC51E9.10200@cern.ch> X-Mailer: Apple Mail (2.3096.5) X-Original-Sender: potswa@gmail.com X-Original-Authentication-Results: mx.google.com; spf=pass (google.com: domain of potswa@gmail.com designates 2607:f8b0:400e:c03::22e as permitted sender) smtp.mailfrom=potswa@gmail.com; dkim=pass header.i=@gmail.com; dmarc=pass (p=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-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:24316 Archived-At: --Apple-Mail=_8938B3E1-FEEA-4978-AEDB-89E5358AF857 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=UTF-8 I suppose I can write a paper for Oulu, but it=E2=80=99s looking a little d= oubtful that I=E2=80=99ll get anything at all submitted for Jacksonville. A= prototype would probably be in order. Is this certainly a design matter? Perhaps it could be handled as a defect = report regarding implementation latitude. Switching from templates to non-t= emplates should only break operator@() function calls with template argu= ment lists. Un-blessing that particular usage might be a small enough chang= e to avoid holding up the TS. Then, a valid TS implementation could use tem= plates or pre-computed overloads. - D > On 2016=E2=80=9302=E2=80=9311, at 5:18 PM, Axel Naumann wrote: >=20 > Hi David, >=20 > Thank you, that's a good argument. Would you mind writing a paper on this= ? I don't want to halt the LWG process for this. The current variant will h= opefully end up in a TS at some point; before we vote that out we can have = your improvement in. >=20 > I'd rather not stop the current variant by going back to LEWG and re-open= ing the design discussion at this stage. I'd prefer it to arrive in the TS,= even at the cost of a only partially perfect (-ly forwarding) variant. >=20 > Cheers, Axel. --=20 ---=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. Visit this group at https://groups.google.com/a/isocpp.org/group/std-propos= als/. --Apple-Mail=_8938B3E1-FEEA-4978-AEDB-89E5358AF857 Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset=UTF-8 I suppose I can wr= ite a paper for Oulu, but it=E2=80=99s looking a little doubtful that I=E2= =80=99ll get anything at all submitted for Jacksonville. A prototype would = probably be in order.

I= s this certainly a design matter? Perhaps it could be handled as a defect r= eport regarding implementation latitude. Switching from templates to non-te= mplates should only break operator@&= lt;T>() function calls with template argument lists. Un-bles= sing that particular usage might be a small enough change to avoid holding = up the TS. Then, a valid TS implementation could use templates or pre-compu= ted overloads.

- D


=
On 2016=E2=80=930= 2=E2=80=9311, at 5:18 PM, Axel Naumann <Axel.Naumann@cern.ch> wrote:

=20 =20
Hi David,

Thank you, that's a good argument. Would you mind writing a paper on this? I don't want to halt the LWG process for this. The current variant will hopefully end up in a TS at some point; before we vote that out we can have your improvement in.

I'd rather not stop the current variant by going back to LEWG and re-opening the design discussion at this stage. I'd prefer it to arrive in the TS, even at the cost of a only partially perfect (-ly forwarding) variant.

Cheers, Axel.

--

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