220 8995 article Path: news.gmane.org!not-for-mail From: Ville Voutilainen Newsgroups: gmane.comp.lang.c++.isocpp.proposals Subject: Re: About implicit binary operator and user defined operators (was n3553 - Swap operator proposal) Date: Sun, 2 Feb 2014 15:55:35 +0200 Lines: 41 Approved: news@gmane.org Message-ID: References: <52EE4A48.9010006@wanadoo.fr> Reply-To: std-proposals@isocpp.org NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 X-Trace: ger.gmane.org 1391349330 14841 80.91.229.3 (2 Feb 2014 13:55:30 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Sun, 2 Feb 2014 13:55:30 +0000 (UTC) To: std-proposals@isocpp.org Original-X-From: std-proposals+bncBC5JHI7A7ALRBV44XGLQKGQE6NW3Q7A@isocpp.org Sun Feb 02 14:55:37 2014 Return-path: Envelope-to: gclcip-std-proposals@m.gmane.org Original-Received: from mail-ob0-f199.google.com ([209.85.214.199]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1W9xWL-0005kL-9e for gclcip-std-proposals@m.gmane.org; Sun, 02 Feb 2014 14:55:37 +0100 Original-Received: by mail-ob0-f199.google.com with SMTP id vb8sf24026061obc.2 for ; Sun, 02 Feb 2014 05:55:36 -0800 (PST) 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:date :message-id:subject:from:to:x-original-sender :x-original-authentication-results:reply-to:precedence:mailing-list :list-id:list-post:list-help:list-archive:list-subscribe :list-unsubscribe:content-type; bh=Mv69qcVs0BjIqmlrnxT6brq/MuUM3CcOzItTyMPoQ9Q=; b=GW04GYdEzmpIeGh4IHWSfqvZjkmcel9D+4cdDf7Vd5naBfd4PX8MIc/LPEqqS5b68T drlwKBfuXB0UW45aXjYpPfhKvtMD/9B6tqrLtKDBQYcfvhwmh50FJqaen6O+ZyvqYWo1 L7SgYRNIRWuiq3bsD44jZKlzzebNithxiggXA26DB8EMBfW4/NVsiHWF0tyvSNDNIhyZ cw5jcAo3bQPE7fWZbK2Ajn9KKVPYd09xoKcHk5ZDAKw058T+rpLCuUV4Fi2naGjixj67 myeikTrZ4WJqkLsPgYWiO/KDAx8VYssfEDouV5Ov7aXJ2Di8TQ9T+esoNLJCzzMnNrzp pCOA== X-Gm-Message-State: ALoCoQkj852qQfRc0nyTnOFhBKb3ORKR2btcZuSFCKSJju6zNfe83dsC9jS10o16JtyBkY89GM8N X-Received: by 10.182.246.39 with SMTP id xt7mr233167obc.40.1391349336103; Sun, 02 Feb 2014 05:55:36 -0800 (PST) X-BeenThere: std-proposals@isocpp.org Original-Received: by 10.140.91.110 with SMTP id y101ls1610749qgd.0.gmail; Sun, 02 Feb 2014 05:55:35 -0800 (PST) X-Received: by 10.224.124.133 with SMTP id u5mr48081865qar.79.1391349335190; Sun, 02 Feb 2014 05:55:35 -0800 (PST) Original-Received: from mail-qa0-x22f.google.com (mail-qa0-x22f.google.com [2607:f8b0:400d:c00::22f]) by mx.google.com with ESMTPS id c6si12604259qad.169.2014.02.02.05.55.35 for (version=TLSv1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Sun, 02 Feb 2014 05:55:35 -0800 (PST) Received-SPF: pass (google.com: domain of ville.voutilainen@gmail.com designates 2607:f8b0:400d:c00::22f as permitted sender) client-ip=2607:f8b0:400d:c00::22f; Original-Received: by mail-qa0-f47.google.com with SMTP id j5so8756425qaq.34 for ; Sun, 02 Feb 2014 05:55:35 -0800 (PST) X-Received: by 10.140.84.19 with SMTP id k19mr45366028qgd.98.1391349335077; Sun, 02 Feb 2014 05:55:35 -0800 (PST) Original-Received: by 10.224.49.65 with HTTP; Sun, 2 Feb 2014 05:55:35 -0800 (PST) In-Reply-To: <52EE4A48.9010006@wanadoo.fr> X-Original-Sender: ville.voutilainen@gmail.com X-Original-Authentication-Results: mx.google.com; spf=pass (google.com: domain of ville.voutilainen@gmail.com designates 2607:f8b0:400d:c00::22f as permitted sender) smtp.mail=ville.voutilainen@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-Google-Group-Id: 399137483710 List-Post: , List-Help: , List-Archive: List-Subscribe: , List-Unsubscribe: , Xref: news.gmane.org gmane.comp.lang.c++.isocpp.proposals:8995 Archived-At: On 2 February 2014 15:38, Vicente J. Botet Escriba wrote: > Haskell interpret any 'name' as a binary left associative operator, e.g. > > a 'swap' b; > > could mean > > swap(a,b); > > Maybe ':' would be more appropriated for C++. > > a :swap: b; > > An orthogonal feature could be to be able to define a user operator operator > :symbols:() (note the symbols are surrounded by two colons) that could allow > to define > > A& operator:=:(A&x,A&y); > A& operator:><:(A&x,A&y); > > and use it as > > a :=: b; > a :><: b; > > What are the pitfalls of such approaches? Operator overloading is supposed to make code more readable. I fail to see how that would be achieved by a :><: b;, and I don't see how a 'swap' b; is any more readable than swap(a, b); -- --- 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. Visit this group at http://groups.google.com/a/isocpp.org/group/std-proposals/. .