From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 32581 invoked by alias); 11 Jan 2012 15:26:02 -0000 Received: (qmail 32546 invoked by uid 22791); 11 Jan 2012 15:26:01 -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; Wed, 11 Jan 2012 15:25:44 +0000 From: "redi at gcc dot gnu.org" To: gcc-bugs@gcc.gnu.org Subject: [Bug libstdc++/51823] [DR 198] reverse iterator returns uninitialized values Date: Wed, 11 Jan 2012 15:26:00 -0000 X-Bugzilla-Reason: CC X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: gcc X-Bugzilla-Component: libstdc++ X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: redi at gcc dot gnu.org X-Bugzilla-Status: NEW X-Bugzilla-Priority: P3 X-Bugzilla-Assigned-To: unassigned at gcc dot gnu.org X-Bugzilla-Target-Milestone: --- X-Bugzilla-Changed-Fields: Summary 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: 2012-01/txt/msg01274.txt.bz2 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51823 Jonathan Wakely changed: What |Removed |Added ---------------------------------------------------------------------------- Summary|reverse iterator |[DR 198] reverse iterator |instantiated with POD type |returns uninitialized |returns uninitialized |values |values + work around | --- Comment #8 from Jonathan Wakely 2012-01-11 15:25:42 UTC --- Thanks, Marc, I'd failed to find the relevant DR number http://www.open-std.org/jtc1/sc22/wg21/docs/lwg-defects.html#198 We could specialize reverse_iterator on a trait that says the extra member isn't needed, and then make that trait true for all iterator types defined in the library. The size would still change for reverse_iterator but I don't see how else to meet the requirement.