220 38667 article Path: news.gmane.org!.POSTED!not-for-mail From: m.cencora@gmail.com Newsgroups: gmane.comp.lang.c++.isocpp.proposals Subject: Three way comparison of arrays Date: Fri, 15 Jun 2018 08:34:10 -0700 (PDT) Lines: 77 Approved: news@gmane.org Message-ID: Reply-To: std-proposals@isocpp.org NNTP-Posting-Host: blaine.gmane.org Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="----=_Part_7908_978029711.1529076850354" X-Trace: blaine.gmane.org 1529076725 8370 195.159.176.226 (15 Jun 2018 15:32:05 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Fri, 15 Jun 2018 15:32:05 +0000 (UTC) To: ISO C++ Standard - Future Proposals Original-X-From: std-proposals+bncBD7YFUMJRYMBB45YR7MQKGQEXFTZ64A@isocpp.org Fri Jun 15 17:32:01 2018 Return-path: Envelope-to: gclcip-std-proposals@m.gmane.org Original-Received: from mail-yw0-f198.google.com ([209.85.161.198]) by blaine.gmane.org with esmtp (Exim 4.84_2) (envelope-from ) id 1fTqhl-00021I-0x for gclcip-std-proposals@m.gmane.org; Fri, 15 Jun 2018 17:32:01 +0200 Original-Received: by mail-yw0-f198.google.com with SMTP id w7-v6sf7570676ywf.1 for ; Fri, 15 Jun 2018 08:34:12 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=isocpp-org.20150623.gappssmtp.com; s=20150623; h=date:from:to:message-id:subject:mime-version:x-original-sender :reply-to:precedence:mailing-list:list-id:list-post:list-help :list-archive:list-subscribe:list-unsubscribe; bh=2pmVINug90/5VuG/5TD3CTIkzK4UPAWG0S8/1iidzuY=; b=HZVY+KuHMDg+E/pW99Fb/2Cj4sKNIDlm4dgT8nsl/ecvPvH0z1JMPGRdJoO13VOMkJ rZ5AdT9EGLq0kHnOEQr/PLYe53cQV07xoCyzmhryPWhJ52day7BGgiWe211QtMWTxSyr VW84Lp/ugKW/XyGLTRoS8J1SZzga5JEKMgmJdYSTWdjdZ/FhdHmuR6M1F7BMcmRICj+6 +iGMK4ZHgZuIM6+SKFVvgBDugds15D53Ry8l6EEz15ehEn1tPpqfKCXvxJEbv9zBwhhd CDHF9uSOH6UT5QnqkiznlB4BqqTGnxwoLoC7G2NquUsplIZ/hVG+jxTF1EzMTqVUOZca tVQg== DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=date:from:to:message-id:subject:mime-version:x-original-sender :reply-to:precedence:mailing-list:list-id:list-post:list-help :list-archive:list-subscribe:list-unsubscribe; bh=2pmVINug90/5VuG/5TD3CTIkzK4UPAWG0S8/1iidzuY=; b=l8dXulfSSAlJAYWFLaINuxECcamEJ1JoaoUFV8TWfgvzr0NMLbo0AkFYVKBjJDPqCz t1Z9Ynp7RHES/iHNYTEwT6jCE430tOwbb2A6ty1OaNmRiznTGutkRBYQnQRK9ysxfUww 1DYwsQPsBvKpwXroSsQeNEo3+RFwE+szk6U1VUMGWqIq0vesLxahFSG7mRUJv7mqNCl+ nlxHgIvC/UPaGIpw3yanzvCjOOubDe1eRbJEZ/90vkIx4csL2n5RcJX4m97oaJ7k7H2h rW9DU3inQlZdNrTP0Cx76dNSPa4PE30enN1pIbfZdAcpTlX2Vg4vRgKusOJXij8hp+aC Bfvg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:message-id:subject:mime-version :x-original-sender:reply-to:precedence:mailing-list:list-id :x-spam-checked-in-group:list-post:list-help:list-archive :list-subscribe:list-unsubscribe; bh=2pmVINug90/5VuG/5TD3CTIkzK4UPAWG0S8/1iidzuY=; b=NHmDCRsq/adjQC4QWImfF7wRSePo+8S372cy2n1If3eDO2BtLZSRYi0vPs13eYH+Wo /C5JyX3D/fV3tPtk/PtioR0VjO6YLJTbfmfnqSauMLwC7d7FOtX241wyWXeKuPxfs9JM pTL57QWxZIvQtFwkp3IyVD1UjeH2hu0U1yJFdN28YtIgpZnR03YIA01nfnY4qFLbW59h KE5xFES5q3DF5EqnynHVSA7Do+4Vt9IBnIOr8pewQSGI6wSVQlutPkfPQRJ+j5bwbwjh MPptmRIQOPfTf7ffiiK6o+8JatX1qZofb/BtUWAX5A71fhPNQfo3YC2yLNXQBIqWkodl fKDA== X-Gm-Message-State: APt69E0+USdXyri/1cbPZtVNjmoUzJC2QYirc5aEYmsc7tW++gBtyvdx xNPz6aHpkNpMeA04I273i8sqQA== X-Google-Smtp-Source: ADUXVKIXUIwayG7tJ86AC2obdr0iLZdlunL8QaYKxNvyLGf+zPt4HRUWbakG868nDBA4lrzW/gXdLQ== X-Received: by 2002:a81:72d7:: with SMTP id n206-v6mr681917ywc.109.1529076852137; Fri, 15 Jun 2018 08:34:12 -0700 (PDT) X-BeenThere: std-proposals@isocpp.org Original-Received: by 2002:a25:e7cd:: with SMTP id e196-v6ls3150631ybh.0.gmail; Fri, 15 Jun 2018 08:34:11 -0700 (PDT) X-Received: by 2002:a25:d98a:: with SMTP id q132-v6mr107469ybg.0.1529076851058; Fri, 15 Jun 2018 08:34:11 -0700 (PDT) X-Original-Sender: m.cencora@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:38667 Archived-At: ------=_Part_7908_978029711.1529076850354 Content-Type: multipart/alternative; boundary="----=_Part_7909_337954557.1529076850354" ------=_Part_7909_337954557.1529076850354 Content-Type: text/plain; charset="UTF-8" Hi, can we finally write idiomatic comparison code for arrays with three way compare? bool foo() { int a1[4] = { 1, 2, 3, 4 }, a2[4] = { 1, 2, 3, 4 }; return (a1 <=> a2) == 0; } I really hope so, and that would we could compare arrays of different size too (always not equal) - useful for template code. Regards, Maciej -- 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. To post to this group, send email to std-proposals@isocpp.org. To view this discussion on the web visit https://groups.google.com/a/isocpp.org/d/msgid/std-proposals/d50deead-c460-414b-b356-a398772b8f69%40isocpp.org. ------=_Part_7909_337954557.1529076850354 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
Hi,

can we finally write idiomatic comp= arison code for arrays with three way compare?

bool=C2=A0foo= ()
{
=C2=A0 =C2=A0 int a1[4] =3D { 1, 2, 3, 4 },= a2[4] =3D { 1, 2, 3, 4 };
= =C2=A0 =C2=A0 return (a1 <=3D> a2) =3D=3D 0;
}


Regards,
Maciej

--
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