220 23713 article Path: news.gmane.org!not-for-mail From: Matthew Woehlke Newsgroups: gmane.comp.lang.c++.isocpp.proposals Subject: Re: Default tuple-like access Date: Thu, 14 Jan 2016 12:30:54 -0500 Lines: 30 Approved: news@gmane.org Message-ID: References: <569583AD.9050208@wanadoo.fr> Reply-To: std-proposals@isocpp.org NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 X-Trace: ger.gmane.org 1452792703 6329 80.91.229.3 (14 Jan 2016 17:31:43 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Thu, 14 Jan 2016 17:31:43 +0000 (UTC) To: std-proposals@isocpp.org Original-X-From: std-proposals+bncBC37LBFWUIFBB4NW362AKGQE73YR6NA@isocpp.org Thu Jan 14 18:31:34 2016 Return-path: Envelope-to: gclcip-std-proposals@m.gmane.org Original-Received: from mail-wm0-f72.google.com ([74.125.82.72]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1aJlkB-0001nh-19 for gclcip-std-proposals@m.gmane.org; Thu, 14 Jan 2016 18:31:31 +0100 Original-Received: by mail-wm0-f72.google.com with SMTP id b14sf107467946wmb.2 for ; Thu, 14 Jan 2016 09:31:30 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=isocpp-org.20150623.gappssmtp.com; s=20150623; h=to:from:subject:date:lines:message-id:references:mime-version :content-type:user-agent:in-reply-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=EtS4viZc07hRa2lLCjNXf9uCZvWppQytq0U3pXnI+WU=; b=FmshcHoD+kTgFGJguA39iIo6NYUwvujj03PqT3AS9LMKBa3D9mqea2yK4cG28cwVU8 ww+QrdXIIlI30bYDeT31VkIT5Vqp0/u/v+tLZ2H2Ge8oTEfT2Fu6Zaz+QfOdYMdsWbtS DIL+VE4gOiIqeZIL20WGG1QMe/2tCc867uSexUtnxYqssm+GgP5hmAgvqRl0E0toQFRg 2k9cnJbA/nRUoV7sMn2e5kgF7aplguLHPatPmyRjisvtXjmGs1lsum8sN0Gr5aDIn+D3 OaDJUkkngEqQLGLLivNHUC1V5e9sho3W4vniErCmTG4h3GM6XsxXEsWJx9lOOEOeoOoc AOp X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:to:from:subject:date:lines:message-id:references :mime-version:content-type:user-agent:in-reply-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=EtS4viZc07hRa2lLCjNXf9uCZvWppQytq0U3pXnI+WU=; b=j3ltPeZEaad5fRpo7eH65hLxU+hVTuv4q6ac43CZxcPFE0hyBVTNSecJ3YTmhX4Yiv kppiOjAXi4z4w4Qv8dE9If/wWMsxMdsgPdLJRXNbEglLCLMA6H0n5+ny79h2D9I7Kc2W Mi26kdfnfYFKKCN9eXgfWap/S5hdFj17oJM/o+uRKYmP4fy12nQ6eL8w/P02GhYgWRtR cQVOBjw7CniDQ91HhiaUcUMkvZzCHBHt/7lrr0U8qhTD81ozqxPrhyhITEU/th0MrFf4 m1YJusyvS5caBCYapUzsrKwTH8Vh7dd03H4gIQDniHjdtwj7qHCi+pVQo5WkxR3D9sE1 X-Gm-Message-State: ALoCoQnu4LNFKTLybbfh/+sX2UHPKfCzCtbYQB9o4vmeAZjXUzt6ESpigsETL1mWOvUjkdOCIEgw7SjLCErb79gqLyk2MAGlYA== X-Received: by 10.25.17.105 with SMTP id g102mr631754lfi.7.1452792690521; Thu, 14 Jan 2016 09:31:30 -0800 (PST) X-BeenThere: std-proposals@isocpp.org Original-Received: by 10.25.134.212 with SMTP id i203ls83339lfd.23.gmail; Thu, 14 Jan 2016 09:31:28 -0800 (PST) X-Received: by 10.25.20.221 with SMTP id 90mr1389284lfu.98.1452792688549; Thu, 14 Jan 2016 09:31:28 -0800 (PST) Original-Received: from plane.gmane.org (plane.gmane.org. [80.91.229.3]) by mx.google.com with ESMTPS id z8si3620870lfc.219.2016.01.14.09.31.28 for (version=TLS1 cipher=AES128-SHA bits=128/128); Thu, 14 Jan 2016 09:31:28 -0800 (PST) Received-SPF: pass (google.com: domain of gclcip-std-proposals@m.gmane.org designates 80.91.229.3 as permitted sender) client-ip=80.91.229.3; Original-Received: from list by plane.gmane.org with local (Exim 4.69) (envelope-from ) id 1aJlk3-0001h4-Ew for std-proposals@isocpp.org; Thu, 14 Jan 2016 18:31:23 +0100 Original-Received: from tripoint.kitware.com ([66.194.253.20]) by main.gmane.org with esmtp (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Thu, 14 Jan 2016 18:31:23 +0100 Original-Received: from mwoehlke.floss by tripoint.kitware.com with local (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Thu, 14 Jan 2016 18:31:23 +0100 X-Injected-Via-Gmane: http://gmane.org/ Original-Lines: 21 Original-X-Complaints-To: usenet@ger.gmane.org X-Gmane-NNTP-Posting-Host: tripoint.kitware.com User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Thunderbird/31.7.0 In-Reply-To: <569583AD.9050208@wanadoo.fr> X-Original-Sender: mwoehlke.floss@gmail.com X-Original-Authentication-Results: mx.google.com; spf=pass (google.com: domain of gclcip-std-proposals@m.gmane.org designates 80.91.229.3 as permitted sender) smtp.mailfrom=gclcip-std-proposals@m.gmane.org; dmarc=fail (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:23713 Archived-At: On 2016-01-12 17:52, Vicente J. Botet Escriba wrote: > I've been working on a proposal (see attached document) > > Default tuple-like access May not be relevant at this time, as you aren't proposing wording yet, but I'd still like to see the default implementation of tuple_size defined in terms of 'the largest value N for which all get<0..N>(C) are well formed' :-). Also, that tuple_size is defined for all C where get<0>(C) is well-formed (i.e. looser restrictions for implicit tuple_size than for implicit get). Explicit conversion to std::pair / std::tuple is not necessary if we have an unpacking operator :-). What's with the swap / hash_value stuff at the end? Copy/paste detritus? Thanks for working on this! -- Matthew -- --- 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. 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