220 16772 <54F8BC59.3000702@coverity.com> article Path: news.gmane.org!not-for-mail From: Tom Honermann Newsgroups: gmane.comp.lang.c++.isocpp.general,gmane.comp.lang.c++.isocpp.proposals Subject: Re: [c++std-core-27199] Re: [std-proposals] Re: Re: An implementation of enhanced auto deduction and abbreviated template syntax using Clang Date: Thu, 5 Mar 2015 15:28:09 -0500 Lines: 46 Approved: news@gmane.org Message-ID: <54F8BC59.3000702@coverity.com> References: <7c7d06ea-1e25-4720-9486-ec068b514ea6@isocpp.org> Reply-To: std-discussion@isocpp.org NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed X-Trace: ger.gmane.org 1425587307 30732 80.91.229.3 (5 Mar 2015 20:28:27 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Thu, 5 Mar 2015 20:28:27 +0000 (UTC) Cc: "std-discussion@isocpp.org" , Faisal Vali To: , Original-X-From: std-discussion+bncBDBNXSHG6UDBBYPY4KTQKGQE24GCZDA@isocpp.org Thu Mar 05 21:28:19 2015 Return-path: Envelope-to: gclcig-std-discussion@m.gmane.org Original-Received: from mail-ie0-f198.google.com ([209.85.223.198]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1YTcNW-0003Lc-Tu for gclcig-std-discussion@m.gmane.org; Thu, 05 Mar 2015 21:28:19 +0100 Original-Received: by iecvy18 with SMTP id vy18sf48315906iec.1 for ; Thu, 05 Mar 2015 12:28:17 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:message-id:date:from:user-agent:mime-version:to :cc:subject:references:in-reply-to:content-type:x-original-sender :x-original-authentication-results:reply-to:precedence:mailing-list :list-id:list-post:list-help:list-archive:list-subscribe :list-unsubscribe; bh=YDxFMH7yITdlW2coxm3zeC8KtBuiizpN/Iigggaxgwc=; b=cA2hB0pRbJxuS52n6JULFalrhIx/33+EifKsvgiXBlAMPKUcgdFqEl/WNNBZofia1k xN6Ee/61QR9NjvAA7RP2mK5oM7U13WzHwJApZM7rf1cFR/s4WaHC+hU6VVegc8e/43tU WTh2s5qHZuY1lN2qF86AorUm4ySOlM5ycKJ8o87SKdAtx2oyVy4omMvPp6caYgJgKAc1 H+9Ljd4DIl9ydRKTY3fEgHhyr9M7yXB6LrWbfUyM1qiQnsYlWmN4Pebjq9akZK8WtEeU g5exZYcVZGleTBW5NCwGGJhjYaEn1ZM+H7li9ymqOHp/L5Db8nM5qFjJG+8y6p9MncSM /rlA== X-Gm-Message-State: ALoCoQkZs6fcKMZQ5gHSE7NkyaQe+LYtu6vNa1eprrxLfQ+8Oq3uPo3hpuVv7QKH/SQ3D9dZ1U1T X-Received: by 10.182.210.227 with SMTP id mx3mr12097554obc.27.1425587297713; Thu, 05 Mar 2015 12:28:17 -0800 (PST) X-BeenThere: std-discussion@isocpp.org Original-Received: by 10.140.33.130 with SMTP id j2ls1501127qgj.37.gmail; Thu, 05 Mar 2015 12:28:17 -0800 (PST) X-Received: by 10.140.165.209 with SMTP id l200mr15403255qhl.84.1425587297259; Thu, 05 Mar 2015 12:28:17 -0800 (PST) Original-Received: from na01-bn1-obe.outbound.protection.outlook.com (mail-bn1on0138.outbound.protection.outlook.com. [157.56.110.138]) by mx.google.com with ESMTPS id b79si6925524qge.107.2015.03.05.12.28.16 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Thu, 05 Mar 2015 12:28:17 -0800 (PST) Received-SPF: pass (google.com: domain of thonermann@coverity.com designates 157.56.110.138 as permitted sender) client-ip=157.56.110.138; Original-Received: from [192.168.1.13] (173.53.22.182) by CO2PR05MB714.namprd05.prod.outlook.com (10.141.228.148) with Microsoft SMTP Server (TLS) id 15.1.99.14; Thu, 5 Mar 2015 20:28:15 +0000 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Thunderbird/31.4.0 In-Reply-To: X-Originating-IP: [173.53.22.182] X-ClientProxiedBy: BLUPR07CA092.namprd07.prod.outlook.com (25.160.24.47) To CO2PR05MB714.namprd05.prod.outlook.com (10.141.228.148) X-Microsoft-Antispam: UriScan:;BCL:0;PCL:0;RULEID:;SRVR:CO2PR05MB714; X-Forefront-Antispam-Report: BMV:0;SFV:NSPM;SFS:(10019020)(6009001)(6049001)(377454003)(479174004)(33656002)(93886004)(76176999)(230783001)(59896002)(92566002)(42186005)(77096005)(2950100001)(50986999)(117156001)(86362001)(77156002)(50466002)(23676002)(87266999)(87976001)(122386002)(40100003)(62966003)(36756003)(46102003)(80316001)(54356999)(65956001)(47776003)(83506001)(66066001);DIR:OUT;SFP:1102;SCL:1;SRVR:CO2PR05MB714;H:[192.168.1.13];FPR:;SPF:None;MLV:sfv;LANG:en; X-Microsoft-Antispam-PRVS: X-Exchange-Antispam-Report-Test: UriScan:; X-Exchange-Antispam-Report-CFA-Test: BCL:0;PCL:0;RULEID:(601004)(5001007)(5005006);SRVR:CO2PR05MB714;BCL:0;PCL:0;RULEID:;SRVR:CO2PR05MB714; X-Forefront-PRVS: 05066DEDBB X-OriginatorOrg: coverity.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 05 Mar 2015 20:28:15.6155 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-Transport-CrossTenantHeadersStamped: CO2PR05MB714 X-Original-Sender: thonermann@coverity.com X-Original-Authentication-Results: mx.google.com; spf=pass (google.com: domain of thonermann@coverity.com designates 157.56.110.138 as permitted sender) smtp.mail=thonermann@coverity.com Precedence: list Mailing-list: list std-discussion@isocpp.org; contact std-discussion+owners@isocpp.org List-ID: X-Google-Group-Id: 495566654649 List-Post: , List-Help: , List-Archive: List-Subscribe: , List-Unsubscribe: , Xref: news.gmane.org gmane.comp.lang.c++.isocpp.general:4980 gmane.comp.lang.c++.isocpp.proposals:16772 Archived-At: On 03/05/2015 01:10 PM, 'Geoffrey Romer' via ISO C++ Standard - Future > I'm not aware of any code that will work with one form but not the > other. My point is simply that "auto" conveys less information to me as > a human reader than a named template parameter would. I've felt concerns about this as well, specifically with respect to behavioral differences observable in template functions vs non-template functions. We all know that there is one object with static storage duration defined by this function: void f(int i) { static int invoke_count; ++invoke_count; } And we all know that there are potentially many objects with static storage duration defined by this template function, one for each instantiation: template void f(int i) { static int invoke_count; ++invoke_count; } But, it is less apparent how many objects with static storage duration are defined by this function: void f(auto t) { static int invoke_count; ++invoke_count; } I don't know that this is a significant concern. But it is enough to give me pause. I've personally never minded the template boilerplate, but I guess I'm weird that way. Tom. -- --- You received this message because you are subscribed to the Google Groups "ISO C++ Standard - Discussion" group. To unsubscribe from this group and stop receiving emails from it, send an email to std-discussion+unsubscribe@isocpp.org. To post to this group, send email to std-discussion@isocpp.org. Visit this group at http://groups.google.com/a/isocpp.org/group/std-discussion/. .