From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 20654 invoked by alias); 19 Feb 2012 11:10:01 -0000 Received: (qmail 20613 invoked by uid 22791); 19 Feb 2012 11:10:00 -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; Sun, 19 Feb 2012 11:09:47 +0000 From: "potswa at mac dot com" To: gcc-bugs@gcc.gnu.org Subject: [Bug c/51437] GCC should warn on the use of reserved identifier/macro names Date: Sun, 19 Feb 2012 11:17:00 -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: potswa at mac 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" Content-Transfer-Encoding: quoted-printable 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: 2012-02/txt/msg01879.txt.bz2 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D51437 --- Comment #11 from David Krauss 2012-02-19 11:09:= 28 UTC --- (In reply to comment #10) > (In reply to comment #9) > > However, note that the standards also reserve various other classes of = names, > > such as types ending in _t, for which GCC should only flag definitions,= not > > uses. Only system headers should define new _t types, but user code ca= n *use* > > types like time_t or pid_t without warning. >=20 > These are only reserved for POSIX, and should not always be warned about! Yes, respecting POSIX would be overkill. In particular, it's OK and common = to define such types in C++ outside the global namespace. > > (Some of the other reserved identifier categories, such as E[A-Z0-9].*, > > is[a-z].*, to[a-z].*, and mem[a-z].* should go under some separate, more > > pedantic warning option.) >=20 > I don't see why this should happen at all. There's nothing special about = these > general names? See comment #3, they are reserved in C99 =C2=A77.26 "Future library directi= ons" (although those patterns aren't quite right).