220 14116 <54fa7b85-56dd-4778-8bd7-ad91c710807d@isocpp.org> article Path: news.gmane.org!not-for-mail From: Markus Grech Newsgroups: gmane.comp.lang.c++.isocpp.proposals Subject: Re: Re: Reconstruct function idea Date: Wed, 22 Oct 2014 03:27:13 -0700 (PDT) Lines: 148 Approved: news@gmane.org Message-ID: <54fa7b85-56dd-4778-8bd7-ad91c710807d@isocpp.org> References: <97aba3ad-71d1-46ef-88e5-ee00137df7fb@isocpp.org> Reply-To: std-proposals@isocpp.org NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_Part_5339_2026213848.1413973633846" X-Trace: ger.gmane.org 1413973642 8703 80.91.229.3 (22 Oct 2014 10:27:22 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Wed, 22 Oct 2014 10:27:22 +0000 (UTC) To: std-proposals@isocpp.org Original-X-From: std-proposals+bncBC44PYFDYAGRBAUNT2RAKGQEUQCOFDQ@isocpp.org Wed Oct 22 12:27:17 2014 Return-path: Envelope-to: gclcip-std-proposals@m.gmane.org Original-Received: from mail-qg0-f69.google.com ([209.85.192.69]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1Xgt8O-0000sy-1j for gclcip-std-proposals@m.gmane.org; Wed, 22 Oct 2014 12:27:16 +0200 Original-Received: by mail-qg0-f69.google.com with SMTP id z107sf7225174qgd.0 for ; Wed, 22 Oct 2014 03:27:15 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=date:from:to:message-id:in-reply-to:references:subject:mime-version :x-original-sender:reply-to:precedence:mailing-list:list-id :list-post:list-help:list-archive:list-subscribe:list-unsubscribe :content-type; bh=JjO3m9BcWWTkyRcUY0QEnUf9KUrpQzgE3oH3zw1pM2s=; b=RHSYaUnAGcgfWdug87gZm2JYgGmiXVhnaYVc62CNzRCdjePW+Fb4/9cdTM2lKuYhUk zeQ2YVx47Sf+ixsNV5hugc6e9ueVUaUjVpgO1vhgiP1q2k00JzNMGioX4NeTakGms3lU tAW9zk118Y7dO3pErjO/ms2jg7anygV01yXCSDQ9F5JQixDM9RuhJOA+D5cxFEXoY/J3 5k4xm8w33FL5z3jk6Gw4FsTKp7rFn3+LdRib/UebM+5Kqae/UHIZMl5qgEnUUjMNC7Bb ywj+iQiSZ1iccBwD6NiK0NAmj+SZHMD1nMQZvufgMKBelGonsZGaGFgbjvnHotshl87d 2jOA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:date:from:to:message-id:in-reply-to:references :subject:mime-version:x-original-sender:reply-to:precedence :mailing-list:list-id:list-post:list-help:list-archive :list-subscribe:list-unsubscribe:content-type; bh=JjO3m9BcWWTkyRcUY0QEnUf9KUrpQzgE3oH3zw1pM2s=; b=KEHHVIoxljp18dyfahOjTBWhXMaFkNwugLyBHw+HN1WjQkjZFt71zcN45YQnlip8xZ smaXLu1RiHuEhBtp0ORIYX/m0i+ToWzaLp1OZqIxm6XZwwHRHdFPGqaWv+gqKD1OUXV6 36bRqcBne2tgN35UwGe06DBXhjfT9E1VKS45IT82bnmrozgE0bCXeSErvD6lk3XzMiKK f6rwilD7HHylr6eoWvHFlfhYtn3piT1OMwqxuiuM1JXt6yF0N1eoOMPfJm8Q59GYoTcc 9d7chiY9XkJNhuH+7ZLjr0fmGNmqLslJAcE5SHTJTfbCJE8FxpfQkTEFfcohdhIQ1/iL p4+A== X-Gm-Message-State: ALoCoQn0GYECifhxv+6alzvfSpIA1izz7vytQPUHzAOWV9GHiSWolxLimmxwBBx2MeaaQBObN+ym X-Received: by 10.236.210.108 with SMTP id t72mr13098572yho.52.1413973635289; Wed, 22 Oct 2014 03:27:15 -0700 (PDT) X-BeenThere: std-proposals@isocpp.org Original-Received: by 10.140.105.227 with SMTP id c90ls656295qgf.52.gmail; Wed, 22 Oct 2014 03:27:14 -0700 (PDT) X-Received: by 10.140.85.212 with SMTP id n78mr6483qgd.21.1413973634527; Wed, 22 Oct 2014 03:27:14 -0700 (PDT) In-Reply-To: X-Original-Sender: markus.grech@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:14116 Archived-At: ------=_Part_5339_2026213848.1413973633846 Content-Type: text/plain; charset=UTF-8 On Tuesday, October 21, 2014 8:54:23 PM UTC+2, Farid Mehrabi wrote: > > > > 2014-10-16 23:46 GMT+03:30 Richard Smith >: > >> On Wed, Oct 15, 2014 at 11:40 PM, Markus Grech > > wrote: >> >>> I'm very surprised that nobody here knows how to write copy&swap >>> correctly. >>> T& operator =(T rhs) >>> { >>> swap(rhs); >>> return *this; >>> } >>> >> >> >> http://stackoverflow.com/questions/7458110/c-unified-assignment-operator-move-semantics/7458222#7458222 >> >> http://stackoverflow.com/questions/18303287/when-is-overloading-pass-by-reference-l-value-and-r-value-preferred-to-pass-by/18303787#18303787 >> > > what is the point in that link? why so much verbosity? > simpler code is easier to maintain and Markus`s code generates optimal > code for most cases(assuming improbability of self assignment). > > regards, > FM. > > > -- > how am I supposed to end the twisted road of your hair in the dark night?? > unless the candle of your face does turn a lamp up on my way!!! > There is no possibility of self assignment, because the parameter is always newly constructed. -- --- 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/. ------=_Part_5339_2026213848.1413973633846 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable


On Tuesday, October 21, 2014 8:54:23 PM UTC+2, Far= id Mehrabi wrote:


2014-10-16 23:46 GMT+03:30 Richard Smith <ric...@metafoo.co.uk>:
<= blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-l= eft-width:1px;border-left-color:rgb(204,204,204);border-left-style:solid;pa= dding-left:1ex">
On Wed, Oct 15, 2014 = at 11:40 PM, Markus Grech <markus...@gmail.com> wrote:
I'm very surprised that nobody here knows how to write copy&a= mp;swap correctly.
T& operator =3D(T rhs)
{
    swap<= span style=3D"color:rgb(102,102,0)">(rhs);
    return *this;
}
=


what is the point = in that link? why so much verbosity?
simpler code is = easier to = maintain and Markus`s code generates optimal code for most case= s(assuming improbability of self assignment).

regards,
FM.

 
--
how am I s= upposed to end the twisted road of  your hair in the dark night??
u= nless the candle of your face does turn a lamp up on my way!!!
There is no possibility of self assignment, beca= use the parameter is always newly constructed. 

--

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