220 13640 article Path: news.gmane.org!not-for-mail From: Zhihao Yuan Newsgroups: gmane.comp.lang.c++.isocpp.proposals Subject: Re: 'with' revisited Date: Fri, 3 Oct 2014 18:38:40 -0400 Lines: 107 Approved: news@gmane.org Message-ID: References: Reply-To: std-proposals@isocpp.org NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: multipart/alternative; boundary="089e0115f0480d3ca805048c6592" X-Trace: ger.gmane.org 1412375936 29041 80.91.229.3 (3 Oct 2014 22:38:56 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Fri, 3 Oct 2014 22:38:56 +0000 (UTC) To: "std-proposals@isocpp.org" Original-X-From: std-proposals+bncBCSKRWMD4EHBB46KXSQQKGQE3B2IR3Y@isocpp.org Sat Oct 04 00:38:50 2014 Return-path: Envelope-to: gclcip-std-proposals@m.gmane.org Original-Received: from mail-vc0-f199.google.com ([209.85.220.199]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1XaBUr-0006H3-73 for gclcip-std-proposals@m.gmane.org; Sat, 04 Oct 2014 00:38:45 +0200 Original-Received: by mail-vc0-f199.google.com with SMTP id le20sf2120510vcb.10 for ; Fri, 03 Oct 2014 15:38:44 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:in-reply-to:references:date :message-id:subject:from:to:sender:x-original-sender :x-original-authentication-results:reply-to:precedence:mailing-list :list-id:list-post:list-help:list-archive:list-subscribe :list-unsubscribe:content-type; bh=w5sJtsHQ0rlSL2JVcdQMO+voRIvoS/pBQwgCg5xzV5g=; b=kKzBHYayeDvl7GD7EDnY+fO8Y1vv11Yv58a6VsyAY5c8eYCzq2YNRe/JUUjJ3108Zo LBZOSfzzuYknXbl59HSNf+KiUOptj6Qb/lEU2uUo9/drKb4TVfN5BFvLYVdMY9gR2u/H SAf90NMB9h8AkIpxUniCGIJP2Pn+T8d+cSHLK6fj3UZWWSSGpFjF9QSB+V395zInuUb3 fNmhdaacJmviL/o+wRUNYNuPhTnDoGkTeo9hkpZYkTdjgLALImBGhJzM8728HxJtAhSt Kuqk0Ut/NWnr+cLCTkKHBCb54XOE+HT8+fCS3nY5aOJH55KFZz8oGendv9i3vPG8jwlU OiZg== X-Gm-Message-State: ALoCoQk8eE9pmWgsofYs63qPxfLM2pK49P8kr46om89SRUMmbJEdyd3+/fEpVUGVptV26SNGF9ID X-Received: by 10.236.24.225 with SMTP id x61mr1003996yhx.43.1412375924171; Fri, 03 Oct 2014 15:38:44 -0700 (PDT) X-BeenThere: std-proposals@isocpp.org Original-Received: by 10.140.34.168 with SMTP id l37ls1408015qgl.46.gmail; Fri, 03 Oct 2014 15:38:43 -0700 (PDT) X-Received: by 10.220.162.73 with SMTP id u9mr3234650vcx.33.1412375923419; Fri, 03 Oct 2014 15:38:43 -0700 (PDT) Original-Received: from mail-s68.mailgun.info (mail-s68.mailgun.info. [184.173.153.196]) by mx.google.com with ESMTPS id jt10si5069038vdb.65.2014.10.03.15.38.43 for (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Fri, 03 Oct 2014 15:38:43 -0700 (PDT) Received-SPF: pass (google.com: domain of bounce+3f9131.69110-std-proposals=isocpp.org@miator.net designates 184.173.153.196 as permitted sender) client-ip=184.173.153.196; Original-Received: from mail-vc0-f175.google.com (mail-vc0-f175.google.com [209.85.220.175]) by mxa.mailgun.org with ESMTP id 542f2571.7f74e81a3db0-in3; Fri, 03 Oct 2014 22:38:41 -0000 (UTC) Original-Received: by mail-vc0-f175.google.com with SMTP id id10so1276320vcb.20 for ; Fri, 03 Oct 2014 15:38:40 -0700 (PDT) X-Received: by 10.52.52.136 with SMTP id t8mr5204657vdo.21.1412375920849; Fri, 03 Oct 2014 15:38:40 -0700 (PDT) Original-Received: by 10.220.132.193 with HTTP; Fri, 3 Oct 2014 15:38:40 -0700 (PDT) In-Reply-To: X-Mailgun-Sid: WyI3MTBkYiIsICJzdGQtcHJvcG9zYWxzQGlzb2NwcC5vcmciLCAiNjkxMTAiXQ== Original-Sender: zy@miator.net X-Original-Sender: zy@miator.net X-Original-Authentication-Results: mx.google.com; spf=pass (google.com: domain of bounce+3f9131.69110-std-proposals=isocpp.org@miator.net designates 184.173.153.196 as permitted sender) smtp.mail=bounce+3f9131.69110-std-proposals=isocpp.org@miator.net; dkim=pass header.i=@miator.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:13640 Archived-At: --089e0115f0480d3ca805048c6592 Content-Type: text/plain; charset=UTF-8 On Fri, Oct 3, 2014 at 6:22 PM, Matthew Woehlke < mw_triad@users.sourceforge.net> wrote: > > // Example 4 > #define synchronized(lock) using (std::lock_guard(lock)) > Exclude this example if you want to write a paper; the transnational memory TS reserved this keyword. > > It was also requested to allow: > > class Foo { ... }; > Foo::Foo(...) using(std::lock_guard(...) > : ...initializers... > { > ... > } > > ...although I personally am less convinced of the need. (OTOH, I think > this would be a use case that is not currently possible, unlike the > others which are mainly syntatic sugar.) > I raised it for consistency. I can imagine some use cases, like opening a tempfile for initializing members, and close it after the object is constructed. I'm good with the `using` keyword. -- Zhihao Yuan, ID lichray The best way to predict the future is to invent it. ___________________________________________________ 4BSD -- http://bit.ly/blog4bsd -- --- 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. Visit this group at http://groups.google.com/a/isocpp.org/group/std-proposals/. --089e0115f0480d3ca805048c6592 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable
On Fri, Oct 3, 2014 at 6:22 PM, Matthew Woehlke <mw_triad@users.sourceforge.net> wrote:
=C2=A0 // Example 4
=C2=A0 #define synchronized(lock) using (std::lock_guard(lock))

Exclude this example if you want to write a paper;= the transnational
memory TS reserved this keyword.
=
=C2=A0

It was also requested to allow:

=C2=A0 class Foo { ... };
=C2=A0 Foo::Foo(...) using(std::lock_guard(...)
=C2=A0 =C2=A0 : ...initializers...
=C2=A0 {
=C2=A0 =C2=A0 ...
=C2=A0 }

....although I personally am less convinced of the need. (OTOH, I think
this would be a use case that is not currently possible, unlike the
others which are mainly syntatic sugar.)

I raised it = for consistency.=C2=A0 I can imagine some use cases, like
opening a temp= file for initializing members, and close it after the
object is construc= ted.

I'm good with the `using` keyword.
--
Zhihao Yuan, ID lichray
The best way to predict the = future is to invent it.
________________________________________________= ___
4BSD -- http://= bit.ly/blog4bsd

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