220 19748 article Path: news.gmane.org!not-for-mail From: Matthew Woehlke Newsgroups: gmane.comp.lang.c++.isocpp.proposals Subject: Re: *** GMX Spamverdacht *** Re: Allow values of void Date: Mon, 10 Aug 2015 09:54:29 -0400 Lines: 44 Approved: news@gmane.org Message-ID: References: <4159b2c4-c03b-4086-9f71-fd5f78a4175c@isocpp.org> <0c973057-a1f2-485d-b8f4-8e0a7a641221@isocpp.org> <1549494.1QHixDtzqm@tjmaciei-mobl4> <6b885185-4217-40b4-a8cf-aa3591a655d4@isocpp.org> <55C542D7.5090500@gmx.de> Reply-To: std-proposals@isocpp.org NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 X-Trace: ger.gmane.org 1439214889 7826 80.91.229.3 (10 Aug 2015 13:54:49 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Mon, 10 Aug 2015 13:54:49 +0000 (UTC) To: std-proposals@isocpp.org Original-X-From: std-proposals+bncBC37LBFWUIFBBHW2UKXAKGQE6JLZBUQ@isocpp.org Mon Aug 10 15:54:40 2015 Return-path: Envelope-to: gclcip-std-proposals@m.gmane.org Original-Received: from mail-wi0-f199.google.com ([209.85.212.199]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1ZOnXD-0003Dd-RA for gclcip-std-proposals@m.gmane.org; Mon, 10 Aug 2015 15:54:39 +0200 Original-Received: by wilj18 with SMTP id j18sf38734870wil.0 for ; Mon, 10 Aug 2015 06:54:39 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:to:from:subject:date:lines:message-id:references :mime-version:content-type:user-agent:in-reply-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=idZPm1Y/DfldmmLjyPAQGNJo+PYFekbJb7JSwL3+NkM=; b=GFaPwOMjBvRQ5ktbXwVritXSr//78ZJHig2Nsx6tbo3ZOzPcD//23hYIgfNepN8S9W xf958Qdu9gBgWYuBE9hluhRzTf25V/BiH//XD5GpcSdpqxx+hZPmq7PH9xuD+FGMaCVX tociS49+TAAwHlcSz1qFn/DNoTcr9KE2qIsEGd2aF2ggdihU85u/+KzTyzWxBDUacFNc /4YPfSHba8fn3yfEKce0INQQ5XV5FJ8cFJXBlL2EKlhWdt684fHgvw/t1woY3X3Om2q6 MwNf+51IZ1cy7ZwIFHKTU+3OCnIj4WMS3qwf/4NV8lsZcvqjuF0dxll2s/B5esLje87o X-Gm-Message-State: ALoCoQknUjcFVcCaORbZIi+xj9D6iMWc5MRhV2qkXzT7ZYBhSm87CqoID0F+4XLYAB/2D3PnrIsJ X-Received: by 10.112.139.65 with SMTP id qw1mr6386042lbb.24.1439214879071; Mon, 10 Aug 2015 06:54:39 -0700 (PDT) X-BeenThere: std-proposals@isocpp.org Original-Received: by 10.152.21.3 with SMTP id r3ls818877lae.89.gmail; Mon, 10 Aug 2015 06:54:37 -0700 (PDT) X-Received: by 10.112.89.201 with SMTP id bq9mr19902437lbb.39.1439214877788; Mon, 10 Aug 2015 06:54:37 -0700 (PDT) Original-Received: from plane.gmane.org (plane.gmane.org. [80.91.229.3]) by mx.google.com with ESMTPS id j9si14098493lam.16.2015.08.10.06.54.37 for (version=TLSv1 cipher=RC4-SHA bits=128/128); Mon, 10 Aug 2015 06:54:37 -0700 (PDT) Received-SPF: pass (google.com: domain of gclcip-std-proposals@m.gmane.org designates 80.91.229.3 as permitted sender) client-ip=80.91.229.3; Original-Received: from list by plane.gmane.org with local (Exim 4.69) (envelope-from ) id 1ZOnX9-0003By-6n for std-proposals@isocpp.org; Mon, 10 Aug 2015 15:54:35 +0200 Original-Received: from tripoint.kitware.com ([66.194.253.20]) by main.gmane.org with esmtp (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Mon, 10 Aug 2015 15:54:35 +0200 Original-Received: from mwoehlke.floss by tripoint.kitware.com with local (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Mon, 10 Aug 2015 15:54:35 +0200 X-Injected-Via-Gmane: http://gmane.org/ Original-Lines: 35 Original-X-Complaints-To: usenet@ger.gmane.org X-Gmane-NNTP-Posting-Host: tripoint.kitware.com User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Thunderbird/31.7.0 In-Reply-To: <55C542D7.5090500@gmx.de> X-Original-Sender: mwoehlke.floss@gmail.com X-Original-Authentication-Results: mx.google.com; spf=pass (google.com: domain of gclcip-std-proposals@m.gmane.org designates 80.91.229.3 as permitted sender) smtp.mail=gclcip-std-proposals@m.gmane.org; dmarc=fail (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-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:19748 Archived-At: On 2015-08-07 19:44, Martin Molzer wrote: >> *RIGHT NOW*, 'void' is used to indicate the absence of a value - i.e. >> Basically, a void value is just ignored > > You are contradicting yourself here, an absent value can't be ignored, it's > just not there. Fine; "value" in the second sentence should have been in quotes. As in: void bar(); void foo() { return bar(); // the "value" here is ignored } > The only special rule we'd have to further analyse is that when a > void method doesn't return, void is returned implicitly. Not really; this code is already legal: int foo() { } (Results in UB, maybe, but legal. Which is absurd, if you ask me, but...) So there is no "need" for such a special rule unless we fix that non-void functions aren't required to explicitly return either. Anyway, since the void case does not produce a meaningful value, the UB is irrelevant for that case. -- Matthew -- --- 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/. .