220 14095 article Path: news.gmane.org!not-for-mail From: Farid Mehrabi Newsgroups: gmane.comp.lang.c++.isocpp.proposals Subject: Re: Re: Reconstruct function idea Date: Tue, 21 Oct 2014 22:24:01 +0330 Lines: 117 Approved: news@gmane.org Message-ID: 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=001a11c3a16af740060505f35b07 X-Trace: ger.gmane.org 1413917668 28496 80.91.229.3 (21 Oct 2014 18:54:28 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Tue, 21 Oct 2014 18:54:28 +0000 (UTC) To: std-proposals Original-X-From: std-proposals+bncBC27JR6ERAOBBXWXTKRAKGQEBQLFPHY@isocpp.org Tue Oct 21 20:54:23 2014 Return-path: Envelope-to: gclcip-std-proposals@m.gmane.org Original-Received: from mail-ee0-f69.google.com ([74.125.83.69]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1XgeZb-0003Vy-6g for gclcip-std-proposals@m.gmane.org; Tue, 21 Oct 2014 20:54:23 +0200 Original-Received: by mail-ee0-f69.google.com with SMTP id b57sf760572eek.8 for ; Tue, 21 Oct 2014 11:54:22 -0700 (PDT) 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: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=ciqeZ5Qr33kdUrLgG0MTpz3Uf/6m07FtAnPvuBl0lmg=; b=Ie9uWOOsUU9NwZKtU/g19aK1gS+BbXnMLc0zMB3V2EQ/sSqRDtQZtUrT95gmIQNnxK mOVF4vfx6vtMDKaRnS69O9YA/pobP5zTSdz08ZFlun8lsV8LGgN8OFvCodnblmCkiTUJ trOqSDeGhdN59/7yegQf299az9r0hbI1fR17iFInmVRRv6dIi/jqiN5ulujg7pQSwVYO OWFUfAtq0P0sBKsL2f+5RglC+DgmJE2bC5xV+yIWpb+b3ELdQsTkpigvCGMET3vgjH8W HUUgTYe3VsWiVsLLsuUeazSVjsLGuGsxdgQEeBBb6qkKNBuJDpYOBpI+5OcsVCnIHgOt dl1A== X-Gm-Message-State: ALoCoQleeNS7o4G2KH9FXF4RifOIbh8PD+yP5YG9G97uKKaBDA8iz0B92seLubF7nTA5BmExoNaZ X-Received: by 10.180.76.42 with SMTP id h10mr21348wiw.6.1413917662870; Tue, 21 Oct 2014 11:54:22 -0700 (PDT) X-BeenThere: std-proposals@isocpp.org Original-Received: by 10.180.93.132 with SMTP id cu4ls163355wib.2.gmail; Tue, 21 Oct 2014 11:54:21 -0700 (PDT) X-Received: by 10.180.21.163 with SMTP id w3mr97578wie.66.1413917661964; Tue, 21 Oct 2014 11:54:21 -0700 (PDT) Original-Received: from mail-wi0-x22a.google.com (mail-wi0-x22a.google.com. [2a00:1450:400c:c05::22a]) by mx.google.com with ESMTPS id wi7si15880336wjb.150.2014.10.21.11.54.21 for (version=TLSv1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Tue, 21 Oct 2014 11:54:21 -0700 (PDT) Received-SPF: pass (google.com: domain of farid.mehrabi@gmail.com designates 2a00:1450:400c:c05::22a as permitted sender) client-ip=2a00:1450:400c:c05::22a; Original-Received: by mail-wi0-f170.google.com with SMTP id hi2so11852599wib.1 for ; Tue, 21 Oct 2014 11:54:21 -0700 (PDT) X-Received: by 10.180.207.77 with SMTP id lu13mr205560wic.12.1413917661673; Tue, 21 Oct 2014 11:54:21 -0700 (PDT) Original-Received: by 10.217.41.5 with HTTP; Tue, 21 Oct 2014 11:54:01 -0700 (PDT) In-Reply-To: X-Original-Sender: farid.mehrabi@gmail.com X-Original-Authentication-Results: mx.google.com; spf=pass (google.com: domain of farid.mehrabi@gmail.com designates 2a00:1450:400c:c05::22a as permitted sender) smtp.mail=farid.mehrabi@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:14095 Archived-At: --001a11c3a16af740060505f35b07 Content-Type: text/plain; charset=UTF-8 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!!! -- --- You received this message because you are subscribed to the Google Groups "ISO C++ Standard - Future Proposals" group. 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2014-10-16 23:46 GMT+03:30 Rich= ard Smith <richard@metafoo.co.uk>:
=
On W= ed, Oct 15, 2014 at 11:40 PM, Markus Grech <markus.grech@gmail.com> wrote:
I'm very surpr= ised that nobody here knows how to write copy&swap correctly.
T&<= span style=3D"color:rgb(0,0,0)"> = operator =3D(T rhs<= span style=3D"color:rgb(102,102,0)">)
{
=C2=A0 =C2=A0 swap(rhs);
=C2= =A0 =C2=A0 return *this;
}


what is the point = in that link? why so much verbosity?
simpler code is = easier to=C2=A0= maintain and=C2=A0Markus`s code generates optimal code for most case= s(assuming improbability of self assignment).

regards,
FM.

=C2=A0
--
how am I s= upposed to end the twisted road of=C2=A0 your hair in the dark night??
u= nless the candle of your face does turn a lamp up on my way!!!

--

---
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