220 24343 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: Sat, 13 Feb 2016 09:44:57 +0100 Lines: 99 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=089e013a089692b6ea052ba2cd89 X-Trace: ger.gmane.org 1455353125 22289 80.91.229.3 (13 Feb 2016 08:45:25 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Sat, 13 Feb 2016 08:45:25 +0000 (UTC) To: std-proposals@isocpp.org Original-X-From: std-proposals+bncBCLZHP5J7MHRBHO27O2QKGQE4WYPAVA@isocpp.org Sat Feb 13 09:45:24 2016 Return-path: Envelope-to: gclcip-std-proposals@m.gmane.org Original-Received: from mail-qk0-f197.google.com ([209.85.220.197]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1aUVpT-0002G0-Kh for gclcip-std-proposals@m.gmane.org; Sat, 13 Feb 2016 09:45:23 +0100 Original-Received: by mail-qk0-f197.google.com with SMTP id x1sf157887184qkc.1 for ; Sat, 13 Feb 2016 00:45:23 -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=T6M64Z3I4DwALMRqkHfbtQ4bnB3N8CbtKXgX9pGkZes=; b=gn3o+EVclMmGhbkEkjGgKGjN9UftUhaYlK+0uqVN6u1aCk72+ubsUs6vJoQLMUruYh WAAak1RPHFi/fNuZ4mjFplgMEyAP0fJHJrgrOPJ+AxuJHrWjUKdelhTd1OsJXAFYh5+O 7/V+jz2m2hEHZfEzDq+NcuiGCMDYMFcmoj15g+WRjRtw7HQ0VwihMh3Mysw1I1PpxWAq BsdRK/o+6fPKi7gMV3RNpUan3Ca8a6egESjsVPUHlCazUSTB6KCSbbIhX21zQYOSr6Or rSBGS0HtQInIaDe75k7Iu55dGA2jWSqtwNGfd2Xsx3886EFuX74ADJ0Onk+OWpBefXY7 XZCw== 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=T6M64Z3I4DwALMRqkHfbtQ4bnB3N8CbtKXgX9pGkZes=; b=IThtDDVzahVfgXLUgpOy0pDX0r3ohFFAgJN5n1ajSSAh7ExxdpQGlC/KKnBlpO5eKa z0HFx+weHmseIqbxNC6MHhGL+GWtGkaCKZwpFmyF9V4hPrHO6fS/uQq4W7hljVjPbesr 2J1nyZFec9UCxSISLGdXPIKyeaNtXRKKlLbFn78BQFPP5zdy/MFrWNTxwv7gg/zBeSXm f1RvsPZhZvo2d+dn+CaLja6U9ibYQ9vunabTe2l36XG8ksuFRy85zcAJ0PzAkVkf8Qum a+avAdjltKFj2lAf5vaN7vL7vHAPDEkBoN06sSU+X1I9PynLD3ASrGPX0EKvD3ywq6BA axEg== X-Gm-Message-State: AG10YOQ/DjbGvKCDrv+E8p8kJOgcwoA967yhwkrreklRBkaLWxyBp3Ago9iGczaWZiWOMA== X-Received: by 10.13.226.84 with SMTP id l81mr5608828ywe.16.1455353122672; Sat, 13 Feb 2016 00:45:22 -0800 (PST) X-BeenThere: std-proposals@isocpp.org Original-Received: by 10.182.236.2 with SMTP id uq2ls1049876obc.11.gmail; Sat, 13 Feb 2016 00:45:17 -0800 (PST) X-Received: by 10.182.48.130 with SMTP id l2mr5075031obn.49.1455353117364; Sat, 13 Feb 2016 00:45:17 -0800 (PST) Original-Received: from mail-ob0-x229.google.com (mail-ob0-x229.google.com. [2607:f8b0:4003:c01::229]) by mx.google.com with ESMTPS id i2si1313773obz.47.2016.02.13.00.45.17 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Sat, 13 Feb 2016 00:45:17 -0800 (PST) Received-SPF: pass (google.com: domain of oliver.kowalke@gmail.com designates 2607:f8b0:4003:c01::229 as permitted sender) client-ip=2607:f8b0:4003:c01::229; Original-Received: by mail-ob0-x229.google.com with SMTP id wb13so153862758obb.1 for ; Sat, 13 Feb 2016 00:45:17 -0800 (PST) X-Received: by 10.182.27.98 with SMTP id s2mr4777355obg.50.1455353117192; Sat, 13 Feb 2016 00:45:17 -0800 (PST) Original-Received: by 10.76.90.170 with HTTP; Sat, 13 Feb 2016 00:44:57 -0800 (PST) In-Reply-To: <7e08b6c5-853c-471e-b248-a9df7e8e27be@isocpp.org> 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::229 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:24343 Archived-At: --089e013a089692b6ea052ba2cd89 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable 016-02-13 1:28 GMT+01:00 Arthur O'Dwyer : > (Also, I'm assuming that Oliver made some typos in his original post =E2= =80=94 > notice I've flipped the "tpl" and "tpl1" in the second line above.) > correct > Also, of course, head(x) should logically return get<0>(x), not some weir= d > synonym for reverse(tail(reverse(x))). > head(x) should return the part from the source tuple's head that fits into tuple x, same applies to tail(x) > But that's just poor naming. The underlying operation here is either > "splice" > I'm only interested in the functionality, not in the naming. One of my project requires such functionality and I was wondering that neither the standard provides such manipulators nor could I find a proposal. tuple ~... and tuple [:] require a language modification - but I need a solution now; so I've written head()/tail() (even if the naming is not perfect). --=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/. --089e013a089692b6ea052ba2cd89 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable
016-= 02-13 1:28 GMT+01:00 Arthur O'Dwyer <arthur.j.odwyer@gmail.com= >:
(Also, I'm assuming that Oliver ma= de some typos in his original post =E2=80=94 notice I've flipped the &q= uot;tpl" and "tpl1" in the second line above.)

correct
=C2=A0
Also, of= course, head(x) should logically return get<0>(x), not some weird sy= nonym for reverse(tail(reverse(x))).

head(x) should return the part from the source tuple's head that= fits into tuple x, same applies to tail(x)
=C2=A0
But that= 's just poor naming. The underlying operation here is either "spli= ce"

I'm only interested in the functionality, not in the naming. One o= f my project requires such functionality and I was wondering that neither t= he standard
provides such manipulators = nor could I find a proposal.

tuple ~... and tuple [:] require a language mo= dification - but I need a solution now; so I've written head()/tail() (= even if the naming is not perfect).

--

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