From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!.POSTED!not-for-mail From: Paul Eggert Newsgroups: gmane.emacs.devel Subject: Re: Why named structs and unions? C11 supports anonymous structs and unions Date: Sun, 11 Feb 2018 23:28:03 -0800 Organization: UCLA Computer Science Department Message-ID: References: <223f1299-8dd8-4c0f-9aed-b216fa913042@email.android.com> NNTP-Posting-Host: blaine.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: quoted-printable X-Trace: blaine.gmane.org 1518420552 7677 195.159.176.226 (12 Feb 2018 07:29:12 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Mon, 12 Feb 2018 07:29:12 +0000 (UTC) User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.6.0 Cc: Emacs Development To: Daniel Colascione Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Mon Feb 12 08:29:07 2018 Return-path: Envelope-to: ged-emacs-devel@m.gmane.org Original-Received: from lists.gnu.org ([208.118.235.17]) by blaine.gmane.org with esmtp (Exim 4.84_2) (envelope-from ) id 1el8Xb-0000FZ-Kg for ged-emacs-devel@m.gmane.org; Mon, 12 Feb 2018 08:28:43 +0100 Original-Received: from localhost ([::1]:49215 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1el8Zd-0007sF-7e for ged-emacs-devel@m.gmane.org; Mon, 12 Feb 2018 02:30:49 -0500 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:42899) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1el8X5-0006Hb-PP for Emacs-devel@gnu.org; Mon, 12 Feb 2018 02:28:12 -0500 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1el8X1-0003YF-Hx for Emacs-devel@gnu.org; Mon, 12 Feb 2018 02:28:11 -0500 Original-Received: from zimbra.cs.ucla.edu ([131.179.128.68]:48164) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1el8X1-0003XB-Bg for Emacs-devel@gnu.org; Mon, 12 Feb 2018 02:28:07 -0500 Original-Received: from localhost (localhost [127.0.0.1]) by zimbra.cs.ucla.edu (Postfix) with ESMTP id 21A56160156; Sun, 11 Feb 2018 23:28:05 -0800 (PST) Original-Received: from zimbra.cs.ucla.edu ([127.0.0.1]) by localhost (zimbra.cs.ucla.edu [127.0.0.1]) (amavisd-new, port 10032) with ESMTP id 8u9x6gCYt_8A; Sun, 11 Feb 2018 23:28:04 -0800 (PST) Original-Received: from localhost (localhost [127.0.0.1]) by zimbra.cs.ucla.edu (Postfix) with ESMTP id 2BC74160186; Sun, 11 Feb 2018 23:28:04 -0800 (PST) X-Virus-Scanned: amavisd-new at zimbra.cs.ucla.edu Original-Received: from zimbra.cs.ucla.edu ([127.0.0.1]) by localhost (zimbra.cs.ucla.edu [127.0.0.1]) (amavisd-new, port 10026) with ESMTP id CZJBfBgS1Gsf; Sun, 11 Feb 2018 23:28:04 -0800 (PST) Original-Received: from [192.168.1.9] (unknown [47.154.30.119]) by zimbra.cs.ucla.edu (Postfix) with ESMTPSA id 0BE25160156; Sun, 11 Feb 2018 23:28:04 -0800 (PST) In-Reply-To: <223f1299-8dd8-4c0f-9aed-b216fa913042@email.android.com> Content-Language: en-US X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x [fuzzy] X-Received-From: 131.179.128.68 X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: "Emacs development discussions." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Original-Sender: "Emacs-devel" Xref: news.gmane.org gmane.emacs.devel:222678 Archived-At: Daniel Colascione wrote: > I feel like being stuck on C99 and not being able to use C11 would be > much rarer. Besides: C99 compilers usually supported anonymous structs = and > unions as an extension. One counterexample is the vendor-supplied compiler on the main server of = our=20 department, which is running Solaris 5.10 (circa 2005). This compiler is = Sun C=20 5.9 (circa 2009). Although more recent versions of this compiler do suppo= rt=20 anonymous structs and unions, bug reports are still being filed about the= =20 feature, e.g., https://community.oracle.com/thread/4106986 dated December= 2017.=20 So I would say it's still a bit dicey in more-recent versions. If it were really important to require this C11 feature I suppose we coul= d forge=20 ahead and do it and tell laggards to upgrade their compilers or use GCC. = But my=20 impression is that the feature is mostly just a nicety, at least for Emac= s.