220 36361 article Path: news.gmane.org!.POSTED!not-for-mail From: Ville Voutilainen Newsgroups: gmane.comp.lang.c++.isocpp.proposals Subject: Re: Default assignment operators for std::pair and std::tuple Date: Tue, 26 Dec 2017 21:35:59 +0200 Lines: 16 Approved: news@gmane.org Message-ID: References: <4110e47f-a021-4ccc-9e03-53e4ebdb8c21@isocpp.org> <4605434.q3o9RnjlYE@tjmaciei-mobl1> <5300cf40-f7db-4eb6-ad36-4742855124ae@isocpp.org> Reply-To: std-proposals@isocpp.org NNTP-Posting-Host: blaine.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset="UTF-8" X-Trace: blaine.gmane.org 1514316845 8516 195.159.176.226 (26 Dec 2017 19:34:05 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Tue, 26 Dec 2017 19:34:05 +0000 (UTC) To: "ISO C++ Standard - Future Proposals" Original-X-From: std-proposals+bncBC5JHI7A7ALRBIGJRLJAKGQEMVW5AMQ@isocpp.org Tue Dec 26 20:34:01 2017 Return-path: Envelope-to: gclcip-std-proposals@m.gmane.org Original-Received: from mail-ot0-f199.google.com ([74.125.82.199]) by blaine.gmane.org with esmtp (Exim 4.84_2) (envelope-from ) id 1eTuz8-0001fl-CH for gclcip-std-proposals@m.gmane.org; Tue, 26 Dec 2017 20:33:58 +0100 Original-Received: by mail-ot0-f199.google.com with SMTP id z32sf9816002ota.5 for ; Tue, 26 Dec 2017 11:36:01 -0800 (PST) ARC-Seal: i=2; a=rsa-sha256; t=1514316960; cv=pass; d=google.com; s=arc-20160816; b=LJ3MDOfbaEYbOBB9CjUvKfWdeYqJT+qVGtALxRGJ1KJEMgmvE2mieLfsr3Jjn5Cf+U 0CdigS5fUofdKtOACXcM9xJ5IOukSfTRqJBggIjkmqJXZmV5j5k1oGyjOIuAf2Ebm1zl EI0Vmr5UlKIKA30yGyVbfuNY2uioVhIHCOqSOFFTV7bt84dSSzlKH3amD9QOqpridUCf j3dbJvO5lC+4To5G/9GIoydqtl483D/c4PfMqTOrW/6YfhTGY4/WmHuQ6T60fyYUds0O 2UEYGHF2v0NpYcigut2N6eIYFvfG/3Gua6W/x6zS3eu1zxdgbkzz8D+Xx5Pa57oLqbfe a+YQ== ARC-Message-Signature: i=2; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-unsubscribe:list-subscribe:list-archive:list-help:list-post :list-id:mailing-list:precedence:reply-to:to:subject:message-id:date :from:references:in-reply-to:mime-version:arc-authentication-results :arc-message-signature:dkim-signature:arc-authentication-results; bh=mAeXG/bD4GhZRvu8ErYUw9DsmNt/E8A61OZB+mUjpQg=; b=LyJnjwmT+LPIjmYxgAIqyjURicpBr9f63CgUdAIDpLMwfmc8RyL4E353WufcmJmFon efPjd1O2OTey16WpHS7GFe8Nd8LJvGghmc0L+7maChaw0uV5z8TLsUYKYwlx5WWAMsEP AwCDazA92I3X/nC638+GP2AKTmGggngsKUF/7EIB485dWivWFWCWrWcXbajfp4QwTJ+Z b8+dGq4IG+9BLwAwbcfoxD1eLjWu1j3n8RimBFpZARupzO4n/kptERroc//3+vLDfdXJ kdAPzEHwVd0LzZng9ilFGY/X0425KZdlSYJbD58dqYjNauSmvbP50Wrd6owhkYsIh/EK G9sg== ARC-Authentication-Results: i=2; mx.google.com; dkim=pass header.i=@gmail.com header.s=20161025 header.b=AV6FkWhs; spf=pass (google.com: domain of ville.voutilainen@gmail.com designates 209.85.220.41 as permitted sender) smtp.mailfrom=ville.voutilainen@gmail.com; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=gmail.com DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=isocpp-org.20150623.gappssmtp.com; s=20150623; h=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; bh=mAeXG/bD4GhZRvu8ErYUw9DsmNt/E8A61OZB+mUjpQg=; b=UaTyCzsmieiY05+u3BM2FXUYp7PiWXYi/4ZC1yLXdrx20Zvxioh8bzErx1qSUkvakh Zi5l4BkT+zXeNz7mFZbGbjX1Kkusa7EjAQmruN5NPLBv8ekTiFegwLKKmwDcoPJRBSxo wL93jWwcvX9G3wVTeHb1ryml6kqIxPyeHoG8vHHQ6ui6iMccsN2YfUcca9YG/Q4clExg GVMJbjzADedCsmT9GTH+jq00sIm6dcHpGfEgKqJmQOzuaCQaRZrZwd+n0YoWmMsHjUJe r/Iv2Cz/XwAtt1jHQN43izRdwFdy/5rnyR3ZPwIB8UFqljxJkSI4D0Q23gnOseZSyPAo tJBA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; 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:x-spam-checked-in-group:list-post:list-help:list-archive :list-subscribe:list-unsubscribe; bh=mAeXG/bD4GhZRvu8ErYUw9DsmNt/E8A61OZB+mUjpQg=; b=UCMBQbs5XN46bZXZzeknlwqq2IaBrbDjb9vs0yZodRrzG0SBCNpkqwYzaZf9mDu/07 gEVIvKMQ1lFo9iMlnuj1VQF5cdpFmJRa3Bue1pma4ozFpO2PYw9SC8gs017rFBmunh06 e5g2/J6KfdI1L4fBN1DJMLAzB1iwEPQpS03C2w3Ld6C3+dxSxOa0iIuPwxZwEno6Z4fF Jnaj4PIwx61wKGgNK29wQYC8shG+TAGBW+jv+CClrzNaGTjNxGRKjNbDKE98g34MlEln 8kJOzB4yCnPkgra5w/3/BUFqm451lOwHZYbysi7NpNLnkGCFeDpZa37p+m9j70vdoo3H 4MIg== X-Gm-Message-State: AKGB3mJM6XSbwMQMxG1BtTeu89p9Dyomf4X5okExNpmhkCE7TgwcVd+F ZD0PyZXjr/xABe1c5GQ3+gLBDA== X-Google-Smtp-Source: ACJfBoudWQx3Nrk/qw2FJsN07kufUstltfWZa7IRYRL69z35Z9hdJRXP42EyH5mUDM8eAMbkujuG6w== X-Received: by 10.157.31.33 with SMTP id x30mr10146539otd.10.1514316960880; Tue, 26 Dec 2017 11:36:00 -0800 (PST) X-BeenThere: std-proposals@isocpp.org Original-Received: by 10.157.49.28 with SMTP id e28ls3258624otc.19.gmail; Tue, 26 Dec 2017 11:36:00 -0800 (PST) X-Received: by 10.157.17.136 with SMTP id v8mr21380540otf.84.1514316960134; Tue, 26 Dec 2017 11:36:00 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1514316960; cv=none; d=google.com; s=arc-20160816; b=qFlS0nLQGloSBJ+q/UliIqNpYQ0OqrkP+YBcubxv6NO2e5+f93CtUWo2kvEcHl7h0n /f5NPGpOMF1DFeqSyI0XB6TEHOItAdaDnr3++mYZlsURI3EghcbfX9C+HP2o6QnTuGLx aGsqnnJtvl44Z4AtSNDgSeGPRkHXBb5POUVSOcsqrQ7t+2bGGA2d5AReWWOvCyaoxF4a dv2orpaRXEXAdNDI90WHQIt99x9JXbEuR/eGfADecpvZfBwvl0WEVvULiA0Ud0+T/SvR tVXfDLbHIIkru5zKk3IjTa+siKwQaIL9WLxC+9HokYZCoQD0rtWKl9r8CXGAIXOhwTsX ejbg== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=to:subject:message-id:date:from:references:in-reply-to:mime-version :dkim-signature:arc-authentication-results; bh=P9sl+qyPblDsKEgQci041U/Q9+HnUaJ2JOlt4WBpYbs=; b=yCxWs40TCw1EqO5maRioQemtrQa/OMviQHpY9S+dF2cRZH5a0igX2qme2XFDw29fTH O2Fp+SOgp8lP0p+7fHIHgDhT5KZwPXE200vplUuOXuLJerusO8AMWHXSvVGzI6mtEjpv cOPXANJW4dO9Jkf8IGlN8hQdT8o/xLYGb2bT2co/EP/Mcw1noJt5eTxg690tkb0QscIO coDaPdehHjfcwvprdLRv1IsJnIjhbv3pJKaVkXtNBvQb40gHTpY4sV+28ts7H4I4W5iR LYWCgBFE7Qoj/jRCcVA1sD14qpOHZLDW4451TKrhYZes5UD/usCHpdU7tJDmjVXndZ4n FDBQ== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@gmail.com header.s=20161025 header.b=AV6FkWhs; spf=pass (google.com: domain of ville.voutilainen@gmail.com designates 209.85.220.41 as permitted sender) smtp.mailfrom=ville.voutilainen@gmail.com; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=gmail.com Original-Received: from mail-sor-f41.google.com (mail-sor-f41.google.com. [209.85.220.41]) by mx.google.com with SMTPS id c189sor9451048oib.112.2017.12.26.11.36.00 for (Google Transport Security); Tue, 26 Dec 2017 11:36:00 -0800 (PST) Received-SPF: pass (google.com: domain of ville.voutilainen@gmail.com designates 209.85.220.41 as permitted sender) client-ip=209.85.220.41; X-Received: by 10.202.81.79 with SMTP id f76mr18319860oib.7.1514316959621; Tue, 26 Dec 2017 11:35:59 -0800 (PST) Original-Received: by 10.157.43.248 with HTTP; Tue, 26 Dec 2017 11:35:59 -0800 (PST) In-Reply-To: <5300cf40-f7db-4eb6-ad36-4742855124ae@isocpp.org> X-Original-Sender: ville.voutilainen@gmail.com X-Original-Authentication-Results: mx.google.com; dkim=pass header.i=@gmail.com header.s=20161025 header.b=AV6FkWhs; spf=pass (google.com: domain of ville.voutilainen@gmail.com designates 209.85.220.41 as permitted sender) smtp.mailfrom=ville.voutilainen@gmail.com; dmarc=pass (p=NONE sp=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-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:36361 Archived-At: On 26 December 2017 at 20:37, mrpi via ISO C++ Standard - Future Proposals wrote: > How would it be an ABI break/change if the standard never specified if it > was trivially copyable or not? In the first place, the discrepancy between The point is that tuple is not a trivially copyable type in libstdc++ today. Making it trivially copyable would be an ABI break. -- 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/CAFk2RUaPfYJCxWTB54eFNBw559Av6XKaLUciixB77by3uLb6eQ%40mail.gmail.com. .