From 2153585148359846858 X-Google-Thread: f78e5,f5fa8c2235f87223,start X-Google-NewGroupId: yes X-Google-Attributes: gid7894ca11fe,domainid0,public,usenet X-Google-Language: ENGLISH,ASCII-7-bit Path: g2news2.google.com!news1.google.com!Xl.tags.giganews.com!border1.nntp.dca.giganews.com!nntp.giganews.com!local2.nntp.dca.giganews.com!news.giganews.com.POSTED!not-for-mail NNTP-Posting-Date: Wed, 31 Mar 2010 18:10:05 -0500 Return-Path: To: (Usenet) From: Scott Meyers Newsgroups: comp.std.c++ Subject: Trivial copy/move operations Organization: albasani.net Sender: cppmods@cs.rpi.edu Approved: austern@google.com Message-ID: Content-Type: text/plain; charset=ISO-8859-1; format=flowed X-Original-Date: Tue, 30 Mar 2010 11:37:00 -0700 X-Submission-Address: std-c++@netlab.cs.rpi.edu Date: Wed, 31 Mar 2010 18:00:23 CST Lines: 20 X-Usenet-Provider: http://www.giganews.com X-Trace: sv3-2IJ15fFO/rGQtAbm8x3SwNjovdgH0G5GMbOhLFqWBrJoVS7FVcMvNpwzUxOd6GaDvoGNQqyWv/3zTrn!7EVx1grQxxjctTVjAmQzZ29lSgBaURgLX1NijOMF9A6Uy0flBv1a7fQz X-Complaints-To: abuse@giganews.com X-DMCA-Notifications: http://www.giganews.com/info/dmca.html X-Abuse-and-DMCA-Info: Please be sure to forward a copy of ALL headers X-Abuse-and-DMCA-Info: Otherwise we will be unable to process your complaint properly X-Postfilter: 1.3.40 Xref: g2news2.google.com comp.std.c++:2343 N3053 (about implicitly-generated move functions) says "Unions have implicit deleted moves if a members has a non-trivial moves. This rule is the same as for copy, and means that a user-defined union copy will not shadow a move." Can somebody please summarize for me what it means for a move or copy operation to be trivial? Thanks, Scott -- [ comp.std.c++ is moderated. To submit articles, try just posting with ] [ your news-reader. If that fails, use mailto:std-c++@netlab.cs.rpi.edu ] [ --- Please see the FAQ before posting. --- ] [ FAQ: http://www.comeaucomputing.com/csc/faq.html ]