220 24016 article Path: news.gmane.org!not-for-mail From: Matthew Woehlke Newsgroups: gmane.comp.lang.c++.isocpp.proposals Subject: Re: RFC: Unpacking tuples to value sequences Date: Mon, 25 Jan 2016 12:20:05 -0500 Lines: 35 Approved: news@gmane.org Message-ID: References: <6f3ece34-e302-4d95-afd0-4c1924e8a780@isocpp.org> <6ad65a24-8a2e-4053-b9c9-80d296d98e7d@isocpp.org> <72de7daf-93af-4e55-95ea-67898bd2a5f6@isocpp.org> <29e7b2a0-05fb-46e2-92bc-2a83f8a1e53c@isocpp.org> 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 1453742425 6836 80.91.229.3 (25 Jan 2016 17:20:25 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Mon, 25 Jan 2016 17:20:25 +0000 (UTC) To: std-proposals@isocpp.org Original-X-From: std-proposals+bncBC37LBFWUIFBBTVSTG2QKGQEKG676MY@isocpp.org Mon Jan 25 18:20:16 2016 Return-path: Envelope-to: gclcip-std-proposals@m.gmane.org Original-Received: from mail-lb0-f198.google.com ([209.85.217.198]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1aNkoJ-0005HF-JR for gclcip-std-proposals@m.gmane.org; Mon, 25 Jan 2016 18:20:15 +0100 Original-Received: by mail-lb0-f198.google.com with SMTP id zr1sf46808289lbb.1 for ; Mon, 25 Jan 2016 09:20:15 -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=qbAPe7Nv8POcF2etegHvKbhNA2l/a19kTCOhmpl+q0k=; b=wg011XsQjqNTWVJrBZhre+Nw5TIwy8r1jN/oi6MsB/rQd7zqFnvnxXNcbhXYRzcE15 ZlSoQ8sPM8R5L9l0cWmxgHIpS3y4gOSDGp0KNJJYNgvbgEW/dw2Hu9KYp+ivrvzAju19 VmlUPv36RyenuvF+vpXq2eBzeoNEPjDlSZLEQiXtteJkjGPkZhcMWQ4hCS3W3VwCerkS C6I3KFwhj7fbF50tjBUVe74hDxtOeQelh2JusnzAjUCD2Kcra6Dcp2t3J5c2kdptz5gI lHiX2THmkKXZKoucEwKcqmQMqLJUV795TIRcoFmaO/tg1zJ4vkTQJ7Yexuqb5C7WcP3S uH2 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=qbAPe7Nv8POcF2etegHvKbhNA2l/a19kTCOhmpl+q0k=; b=HYXHgUW9TlAEKau2c4vdPwqho/6+hPdStTYpibkggkcx2NSy8Pj8D9I6Su5ONDaDpv qwX7OQ8WRFvJRW7o8eMle0k543sIw/nRS9A6yK9uxoJoYEsgxzY2SxZCebkjRGnzOr1z CWiIyhnYTaa2kKfUDfGLPCrSIYPag/WGIJQUdfhpzjDu/YmPKtnzBTJB6hbfwZfdkoq6 uA9BiEIr0lDtlN+FIKPghCXANCRP+duvoGVS4RV4iyFp0lua5iRS4o9BAtybsVk6j70G W3tQxNotNLPFJ48Kq0iupx9mZtSbQL+RQHZrFQsWyGY7gKvM+KbuIqrgIhK2JyEtYjrM X-Gm-Message-State: AG10YOTRr49Wa+/vXA6/Pj/yBxDUbCBStxZOuNfgR/nruFSI0CO9nQ/wIO0ExTBnaczIgA== X-Received: by 10.112.138.98 with SMTP id qp2mr2343166lbb.4.1453742415235; Mon, 25 Jan 2016 09:20:15 -0800 (PST) X-BeenThere: std-proposals@isocpp.org Original-Received: by 10.25.87.194 with SMTP id l185ls468144lfb.96.gmail; Mon, 25 Jan 2016 09:20:13 -0800 (PST) X-Received: by 10.25.83.209 with SMTP id h200mr7003142lfb.129.1453742413419; Mon, 25 Jan 2016 09:20:13 -0800 (PST) Original-Received: from plane.gmane.org (plane.gmane.org. [80.91.229.3]) by mx.google.com with ESMTPS id dw8si10338994lbc.59.2016.01.25.09.20.13 for (version=TLS1 cipher=AES128-SHA bits=128/128); Mon, 25 Jan 2016 09:20:13 -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 1aNkoG-0005F2-BL for std-proposals@isocpp.org; Mon, 25 Jan 2016 18:20:12 +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 ; Mon, 25 Jan 2016 18:20:12 +0100 Original-Received: from mwoehlke.floss by tripoint.kitware.com with local (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Mon, 25 Jan 2016 18:20:12 +0100 X-Injected-Via-Gmane: http://gmane.org/ Original-Lines: 26 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: 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:24016 Archived-At: On 2016-01-25 11:25, Ville Voutilainen wrote: > On 25 January 2016 at 17:32, Matthew Woehlke wrote: >> But if that's the case, then what's the problem here? Arthur originally >> said: >> >> On 2016-01-20 18:13, Arthur O'Dwyer wrote: >>> would [mpl::vector] *not* be "tuple-like" because you couldn't use >>> std::get on it at runtime? >> >> ...but then, I don't understand why that would be true? >> >> Back to that question, yes, the idea as I understand it is that >> "tuple-like" <=> "can use get". Why is that an issue? > > > mpl::vector is a container of types, not values. get is a value-getter. Ah. Um... how would you then *use* an mpl::vector in any context that you would use a tuple-like? A std::tuple is certainly a value collection. By extension, a tuple-like is also a value collection. So... different premise, but same question; is there a problem here (and if so, why)? -- 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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