220 23734 article Path: news.gmane.org!not-for-mail From: Matthew Woehlke Newsgroups: gmane.comp.lang.c++.isocpp.proposals Subject: Re: invoke and unpacking tuple-like type instances Date: Fri, 15 Jan 2016 09:47:49 -0500 Lines: 48 Approved: news@gmane.org Message-ID: References: <56914870.3020407@wanadoo.fr> <56981E8C.1000703@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 Content-Transfer-Encoding: quoted-printable X-Trace: ger.gmane.org 1452869296 1712 80.91.229.3 (15 Jan 2016 14:48:16 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Fri, 15 Jan 2016 14:48:16 +0000 (UTC) To: std-proposals@isocpp.org Original-X-From: std-proposals+bncBC37LBFWUIFBBJEN4S2AKGQEXA77HZQ@isocpp.org Fri Jan 15 15:48:06 2016 Return-path: Envelope-to: gclcip-std-proposals@m.gmane.org Original-Received: from mail-wm0-f69.google.com ([74.125.82.69]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1aK5fZ-000093-TJ for gclcip-std-proposals@m.gmane.org; Fri, 15 Jan 2016 15:48:05 +0100 Original-Received: by mail-wm0-f69.google.com with SMTP id u188sf6732845wmu.3 for ; Fri, 15 Jan 2016 06:48:05 -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:content-transfer-encoding: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=zrI1bEvhTOL02ScKFjNzI4t7TB+22KSNH4cHkk3ooew=; b=EaVl5q8XLkJcHfi5nNg0MQ6bhcIh+G9S3s2655GyJOnTOmJRY9DwzhtY0k6wJI2DyI ZC0Srj2Abkf0blgtexRQbM+PbPanhrkZ0YB+fAAgo5ojY5grq5rGEDwJ2/djsg9Zpih4 1xW1RMxE6xJKIgR7sBjBi70YEtP44rAt6JcG8dEt4fCd26nABrTpMZ+weqtI2K0dEHT2 /vnBF15KqGEv4NtPZiV0JJ7+uv4wA1qRq8X+ee0GQgAdoYvF3piRkHiK4mQQFKtN0rkk c11i7ft9AuHOdbTl+nI5oRTTkjzCsZVQafyAb12Xk46zo8V3F6STYaz 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:content-transfer-encoding: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=zrI1bEvhTOL02ScKFjNzI4t7TB+22KSNH4cHkk3ooew=; b=cEXaI2jSZV7/MT427hZHiC5LdlvtVpKp/UHAh9TcfCbgyAuaCn//E0HaIQ/OD39RpI D8wq15X/J3SLwm0wHl9jNXZxAgu4BxPwRj39HGNCu7gA12vYInN7vGhTIiqSg+TcrzTK 5Tj9tTH65vo8uMBKvIrHoR5HIDY1VktEHW6b37fyX4VAKMSKLv2sZqk4Pn+Nq5tWfXjd Wl1eEU5peAZfnIB0mdm55NbcLOoGnVQ0QeHBF62skM0s3G3OJ6nE5Nvbrh9n4JZSwgQh bdYpcVyJRR9R71OHZHUmzcqZgxwOt2ME4iXMKxQmSALjnpxwnuj X-Gm-Message-State: ALoCoQkNX//Tv2qxudge58yjrQFWIIrs3F41Wbbdh4TZiv9FwV9/gJa4JXpPKTqhecmQ+aakfHfLsXHX5taSltKX0a+rBmN8rA== X-Received: by 10.112.161.232 with SMTP id xv8mr1264097lbb.16.1452869285467; Fri, 15 Jan 2016 06:48:05 -0800 (PST) X-BeenThere: std-proposals@isocpp.org Original-Received: by 10.25.87.194 with SMTP id l185ls177244lfb.96.gmail; Fri, 15 Jan 2016 06:48:03 -0800 (PST) X-Received: by 10.25.24.195 with SMTP id 64mr2909523lfy.156.1452869283527; Fri, 15 Jan 2016 06:48:03 -0800 (PST) Original-Received: from plane.gmane.org (plane.gmane.org. [80.91.229.3]) by mx.google.com with ESMTPS id ar4si5832811lbc.183.2016.01.15.06.48.03 for (version=TLS1 cipher=AES128-SHA bits=128/128); Fri, 15 Jan 2016 06:48:03 -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 1aK5fQ-0008TF-7r for std-proposals@isocpp.org; Fri, 15 Jan 2016 15:47:56 +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 ; Fri, 15 Jan 2016 15:47:56 +0100 Original-Received: from mwoehlke.floss by tripoint.kitware.com with local (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Fri, 15 Jan 2016 15:47:56 +0100 X-Injected-Via-Gmane: http://gmane.org/ Original-Lines: 35 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: <56981E8C.1000703@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:23734 Archived-At: On 2016-01-14 17:17, Vicente J. Botet Escriba wrote: > Le 14/01/2016 18:00, Matthew Woehlke a =C3=A9crit : >> On 2016-01-09 12:50, Vicente J. Botet Escriba wrote: >>> I would like to have some feedback on a function that acts as unpacking >>> tuple-like classes in the context of the invoke function. This was >>> presented already with the name args(t) as an alternative library >>> solution to unpack tuple in the thread "[std-discussion] Distinction >>> between Argument packs and tuples" [1] where an operator... on tuple wa= s >>> proposed. The proposed operator... introduced breaking changes and so >>> another operator would be needed. >>> >>> [...bunches of examples...] >> >> Ugh, is the benefit of not adding a language feature *really* worth all >> the ugliness, difficulties, and limitations entailed in using the >> suggested library feature? > > I will be happy to review a concrete proposal ;-) Yeah... I should probably write one... >> Not to mention that there is now a magic type >> that behaves differently in certain functions? > > Which type? unpacked... or did I completely misunderstand your approach? > See my proposal as an incentive for you to write the language-like based > unpack proposal. :-) --=20 Matthew --=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/. .