220 24399 article Path: news.gmane.org!not-for-mail From: Oliver Kowalke Newsgroups: gmane.comp.lang.c++.isocpp.proposals Subject: Re: Re: [tuple] extracting tuples out of a tuple Date: Mon, 15 Feb 2016 20:12:25 +0100 Lines: 73 Approved: news@gmane.org Message-ID: References: <7e08b6c5-853c-471e-b248-a9df7e8e27be@isocpp.org> Reply-To: std-proposals@isocpp.org NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: multipart/alternative; boundary=001a11c182ae373722052bd3cd68 X-Trace: ger.gmane.org 1455563567 15195 80.91.229.3 (15 Feb 2016 19:12:47 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Mon, 15 Feb 2016 19:12:47 +0000 (UTC) To: std-proposals@isocpp.org Original-X-From: std-proposals+bncBCLZHP5J7MHRBLGGRC3AKGQEIRK344Y@isocpp.org Mon Feb 15 20:12:46 2016 Return-path: Envelope-to: gclcip-std-proposals@m.gmane.org Original-Received: from mail-ig0-f198.google.com ([209.85.213.198]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1aVOZi-0004fF-Jy for gclcip-std-proposals@m.gmane.org; Mon, 15 Feb 2016 20:12:46 +0100 Original-Received: by mail-ig0-f198.google.com with SMTP id hb3sf248689617igb.1 for ; Mon, 15 Feb 2016 11:12:46 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=isocpp-org.20150623.gappssmtp.com; s=20150623; h=mime-version:in-reply-to:references:from:date:message-id:subject:to :content-type: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=rOXI0sOdJQdhMosfP2hrPRuNjww6+S0KW2Lm48hOLT8=; b=VmIg2zl7tgNrQf33AVQOxvnRnlw/G5tTJs99rfvzLFxhHWwJ1/kPBwgdWOhKCESciv LPBvTktuz/8+N7uUBab1CxaLeaplZxqaK43BKdNYj/KOgLeKcReidS6qfIzx3aiBbUNE vHYw5gAjXNIlWassUlSwESSwj4y5YuBaNte8ZcUp7OA1YsgQmJZRUsVyDKv9VxXjVOvW AM1xcKEcHGh0faOnIOWZEoxVVrpCD6irDUwi1g6ET7tuCi8hdXF708BQZ/GluVeiR/VJ JT/SUiSZ3+0U1wh+lmjj9A3wnNZzQ1DgebfhXTKInRlQ+ymjRW1mLkKUEoFPM7H/2WRc +zew== 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:from:date :message-id:subject:to:content-type: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=rOXI0sOdJQdhMosfP2hrPRuNjww6+S0KW2Lm48hOLT8=; b=RHAxTTmUNy+/euja4hc9SaUub6ySCJk+VqtcdRKHeV1sXq4KIf6EwrwNuIWl9PxFVg IOgjVApjxyJADbefuYcQyCWkG067UwqOyPFhWdklsJyXFRee/jyIRC7lmG8k2cz3riGU WHaV8PE53hp83hGFhfYyCr8Vv/uxKrPqBRnABfIpJJbSnczbclfWcns7VWhOSbASBjJp 3U0rO1U/TC5JPwfi+a71V9jbSajGaFtDx5bqmFjM6udbJ342Ns+wBgUcss8is7LkqCNt mjwLJd8wImvby2gISsWuio0gN9sG5dg9JiAENhEjnWiFEMsxp3xk4ZkXRqL03UboWTYs Lb1Q== X-Gm-Message-State: AG10YORUWTyjyCDc8qaR7Cj8AQs45upyg6k4tFRMlPAU78sMRdoYKCGQCRh5SIZ0tIDCIA== X-Received: by 10.182.33.42 with SMTP id o10mr12341963obi.12.1455563565708; Mon, 15 Feb 2016 11:12:45 -0800 (PST) X-BeenThere: std-proposals@isocpp.org Original-Received: by 10.182.49.166 with SMTP id v6ls1455950obn.72.gmail; Mon, 15 Feb 2016 11:12:44 -0800 (PST) X-Received: by 10.202.78.21 with SMTP id c21mr11903026oib.136.1455563564766; Mon, 15 Feb 2016 11:12:44 -0800 (PST) Original-Received: from mail-ob0-x230.google.com (mail-ob0-x230.google.com. [2607:f8b0:4003:c01::230]) by mx.google.com with ESMTPS id v126si18679994oib.124.2016.02.15.11.12.44 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Mon, 15 Feb 2016 11:12:44 -0800 (PST) Received-SPF: pass (google.com: domain of oliver.kowalke@gmail.com designates 2607:f8b0:4003:c01::230 as permitted sender) client-ip=2607:f8b0:4003:c01::230; Original-Received: by mail-ob0-x230.google.com with SMTP id gc3so124311735obb.3 for ; Mon, 15 Feb 2016 11:12:44 -0800 (PST) X-Received: by 10.202.201.216 with SMTP id z207mr13279811oif.98.1455563564593; Mon, 15 Feb 2016 11:12:44 -0800 (PST) Original-Received: by 10.76.81.1 with HTTP; Mon, 15 Feb 2016 11:12:25 -0800 (PST) In-Reply-To: X-Original-Sender: oliver.kowalke@gmail.com X-Original-Authentication-Results: mx.google.com; spf=pass (google.com: domain of oliver.kowalke@gmail.com designates 2607:f8b0:4003:c01::230 as permitted sender) smtp.mailfrom=oliver.kowalke@gmail.com; dkim=pass header.i=@gmail.com; dmarc=pass (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:24399 Archived-At: --001a11c182ae373722052bd3cd68 Content-Type: text/plain; charset=UTF-8 2016-02-15 16:54 GMT+01:00 Matthew Woehlke : > > Then proposing a standard library modification is not going to help you > either; in both cases, you'll need to implement a work-around until at > least C++20. actually I was asking for an existing proposal - but I couldn't found one > General splicing (i.e. `[:]`) can do the same tasks as your > proposed library features, but it does them *better* (not limited to > std::tuple), and it does *a whole lot more*. > the '[:] ' - syntax looks ugly for me - I would prefer a library solution (which could support std::array too). -- --- You received this message because you are subscribed to the Google Groups "ISO C++ Standard - Future Proposals" group. 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2016= -02-15 16:54 GMT+01:00 Matthew Woehlke <mwoehlke.floss@gmail.com>:

Then proposing a standard library modification is not going to help = you
either; in both cases, you'll need to implement a work-around until at<= br> least C++20.

actually I was asking for an e= xisting proposal - but I couldn't found one
=C2=A0
<= blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px= #ccc solid;padding-left:1ex">General splicing (i.e. `[:]`) can do the same= tasks as your
proposed library features, but it does them *better* (not limited to
std::tuple), and it does *a whole lot more*.

the '[:] ' - syntax looks ugly for me = - I would prefer a library solution (which could support
std::array too).

--

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