From owner-sc22wg14+sc22wg14-domo2=www.open-std.org@open-std.org Fri Oct 21 15:45:36 2016 Return-Path: X-Original-To: sc22wg14-domo2 Delivered-To: sc22wg14-domo2@www.open-std.org Received: by www.open-std.org (Postfix, from userid 521) id C45EF35889E; Fri, 21 Oct 2016 15:45:36 +0200 (CEST) Delivered-To: sc22wg14@open-std.org Received: from mga04.intel.com (mga04.intel.com [192.55.52.120]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by www.open-std.org (Postfix) with ESMTP id D5778357227 for ; Fri, 21 Oct 2016 15:45:25 +0200 (CEST) Received: from fmsmga002.fm.intel.com ([10.253.24.26]) by fmsmga104.fm.intel.com with ESMTP; 21 Oct 2016 06:45:25 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.31,376,1473145200"; d="scan'208";a="1073722131" Received: from orsmsx110.amr.corp.intel.com ([10.22.240.8]) by fmsmga002.fm.intel.com with ESMTP; 21 Oct 2016 06:45:23 -0700 Received: from orsmsx155.amr.corp.intel.com (10.22.240.21) by ORSMSX110.amr.corp.intel.com (10.22.240.8) with Microsoft SMTP Server (TLS) id 14.3.248.2; Fri, 21 Oct 2016 06:45:23 -0700 Received: from orsmsx103.amr.corp.intel.com ([169.254.5.152]) by ORSMSX155.amr.corp.intel.com ([10.22.240.21]) with mapi id 14.03.0248.002; Fri, 21 Oct 2016 06:45:23 -0700 From: "Nelson, Clark" To: ISO C Subject: Suggested TC for DR 494 Thread-Topic: Suggested TC for DR 494 Thread-Index: AdIroVszfhVtAQVdTgWq4jPtiegu8w== Date: Fri, 21 Oct 2016 13:45:22 +0000 Message-ID: <38C37E44FD352B44ABFC58410B0790D0ABC52B04@ORSMSX103.amr.corp.intel.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [10.22.254.139] Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Sender: owner-sc22wg14@open-std.org Precedence: bulk Currently, the last sentence of 6.7.6.2p5 is: Where a size expression is part of the operand of a sizeof operator and changing the value of the size expression would not affect the result of the operator, it is unspecified whether or not the size expression is evaluated. I propose to add a new sentence immediately after it: Where a size expression is part of the operand of an _Alignof operator, that expression is not evaluated. As a reminder, the main question about whether the expression is evaluated at all is relevant only if the expression has any side effects. Clark