From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 20726 invoked by alias); 6 Dec 2011 11:50:35 -0000 Received: (qmail 20716 invoked by uid 22791); 6 Dec 2011 11:50:34 -0000 X-SWARE-Spam-Status: No, hits=-2.9 required=5.0 tests=ALL_TRUSTED,AWL,BAYES_00 X-Spam-Check-By: sourceware.org Received: from localhost (HELO gcc.gnu.org) (127.0.0.1) by sourceware.org (qpsmtpd/0.43rc1) with ESMTP; Tue, 06 Dec 2011 11:50:22 +0000 From: "vanboxem.ruben at gmail dot com" To: gcc-bugs@gcc.gnu.org Subject: [Bug c/51437] GCC should warn on the use of reserved identifier/macro names Date: Tue, 06 Dec 2011 11:50:00 -0000 X-Bugzilla-Reason: CC X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: gcc X-Bugzilla-Component: c X-Bugzilla-Keywords: X-Bugzilla-Severity: enhancement X-Bugzilla-Who: vanboxem.ruben at gmail dot com X-Bugzilla-Status: UNCONFIRMED X-Bugzilla-Priority: P3 X-Bugzilla-Assigned-To: unassigned at gcc dot gnu.org X-Bugzilla-Target-Milestone: --- X-Bugzilla-Changed-Fields: Message-ID: In-Reply-To: References: X-Bugzilla-URL: http://gcc.gnu.org/bugzilla/ Auto-Submitted: auto-generated Content-Type: text/plain; charset="UTF-8" MIME-Version: 1.0 Mailing-List: contact gcc-bugs-help@gcc.gnu.org; run by ezmlm Precedence: bulk List-Id: List-Archive: List-Post: List-Help: Sender: gcc-bugs-owner@gcc.gnu.org X-SW-Source: 2011-12/txt/msg00560.txt.bz2 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51437 --- Comment #2 from Ruben Van Boxem 2011-12-06 11:50:18 UTC --- (In reply to comment #1) > (In reply to comment #0) > > For C and C++, Clang > > Ahem! > > > For C++ a single underscore is also reserved for the global namespace. > > That comes from C, not C++: > "All identifiers that begin with an underscore are always reserved for use as > identifiers with file scope in both the ordinary and tag name spaces." Fair enough. I warned you, I only quickly glanced at both standard documens :)