220 16783 article Path: news.gmane.org!not-for-mail From: Ville Voutilainen Newsgroups: gmane.comp.lang.c++.isocpp.general,gmane.comp.lang.c++.isocpp.proposals Subject: Re: Re: [c++std-core-27199] Re: [std-proposals] Re: Re: An implementation of enhanced auto deduction and abbreviated template syntax using Clang Date: Fri, 6 Mar 2015 01:52:39 +0200 Lines: 25 Approved: news@gmane.org Message-ID: References: <7c7d06ea-1e25-4720-9486-ec068b514ea6@isocpp.org> <322c42f4-8a77-4d25-8874-029666dc29d9@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 X-Trace: ger.gmane.org 1425599562 2865 80.91.229.3 (5 Mar 2015 23:52:42 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Thu, 5 Mar 2015 23:52:42 +0000 (UTC) Cc: std-proposals@isocpp.org, Faisal Vali To: "std-discussion@isocpp.org" Original-X-From: std-discussion+bncBC5JHI7A7ALRBR6Y4OTQKGQEUQJVOWY@isocpp.org Fri Mar 06 00:52:41 2015 Return-path: Envelope-to: gclcig-std-discussion@m.gmane.org Original-Received: from mail-pa0-f72.google.com ([209.85.220.72]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1YTfZI-00043s-QT for gclcig-std-discussion@m.gmane.org; Fri, 06 Mar 2015 00:52:41 +0100 Original-Received: by padet14 with SMTP id et14sf125346729pad.2 for ; Thu, 05 Mar 2015 15:52:39 -0800 (PST) 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:cc: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=YruBm1ssogZxPqZl8n/JvU9fYJVuGMAp9bvTuPb96WM=; b=mmh3fn78obe49h4UbqWdwYycu79bSrtctXfPGXlBxNNTrKGayamYezx1m/8LwTQ48L B9XB/vO2vvGsRAbovUwIfqE8UqdKS9lJ8qeWx1d6I/Rq/02pOgMLmQnw2Hi4rpEtesXc kg0DjKZnW9fF61/E4yzhhBUxk1fMYrtcJ42MBV+QrkfZNW8+cB/GSqsUXMcEGyAG6QZN RmtCsurvdhz4jxHVcSAcPPqU0u0WeMl3X6VwsIsSe2sUOGe4aeelKZdW784SYkgPmYcF 4mZCyw5Zx1HcSHceBf4F8eDUcerBEbMivlD0P010+/LWtcGoyJt+O0EoUb+NAwJxTTKL MwgA== X-Gm-Message-State: ALoCoQndHEdSnRf7vKuq9Ga0crU2OBfbIL7NbGkWoQA6rPYiO8jNXrQiamQk8qkUup20OgiHhu/j X-Received: by 10.67.15.103 with SMTP id fn7mr12609707pad.24.1425599559893; Thu, 05 Mar 2015 15:52:39 -0800 (PST) X-BeenThere: std-discussion@isocpp.org Original-Received: by 10.50.29.108 with SMTP id j12ls93245igh.35.gmail; Thu, 05 Mar 2015 15:52:39 -0800 (PST) X-Received: by 10.51.17.7 with SMTP id ga7mr8098411igd.42.1425599559495; Thu, 05 Mar 2015 15:52:39 -0800 (PST) Original-Received: from mail-ie0-x233.google.com (mail-ie0-x233.google.com. [2607:f8b0:4001:c03::233]) by mx.google.com with ESMTPS id h1si10194182igh.3.2015.03.05.15.52.39 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Thu, 05 Mar 2015 15:52:39 -0800 (PST) Received-SPF: pass (google.com: domain of ville.voutilainen@gmail.com designates 2607:f8b0:4001:c03::233 as permitted sender) client-ip=2607:f8b0:4001:c03::233; Original-Received: by iecvy18 with SMTP id vy18so17261951iec.9; Thu, 05 Mar 2015 15:52:39 -0800 (PST) X-Received: by 10.107.26.80 with SMTP id a77mr23985474ioa.78.1425599559343; Thu, 05 Mar 2015 15:52:39 -0800 (PST) Original-Received: by 10.36.86.209 with HTTP; Thu, 5 Mar 2015 15:52:39 -0800 (PST) In-Reply-To: <322c42f4-8a77-4d25-8874-029666dc29d9@isocpp.org> X-Original-Sender: ville.voutilainen@gmail.com X-Original-Authentication-Results: mx.google.com; spf=pass (google.com: domain of ville.voutilainen@gmail.com designates 2607:f8b0:4001:c03::233 as permitted sender) smtp.mail=ville.voutilainen@gmail.com; dkim=pass header.i=@gmail.com; dmarc=pass (p=NONE dis=NONE) header.from=gmail.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:4989 gmane.comp.lang.c++.isocpp.proposals:16783 Archived-At: On 6 March 2015 at 01:43, Matthew Fioravante wrote: >> void frob(auto t) >> { >> // if I want to use 'T' here, I need to do a decltype(t) to get at it >> } > You may need remove pointer, ref, and/or cv qualifiers if you use auto*, > auto&& (perfect forwarding), const auto&, etc.. using type_traits. If the > signature changes, you'll have to remember to fix the traits you used. Yes. Not that the "signature changes" is all that much different from an old-skool template. > If your implementation needs to express type T, it might be better to use > the old template syntax. Perhaps so. That may be a fairly big "if". -- --- 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/. .