From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 15116 invoked by alias); 11 Jan 2014 12:30:57 -0000 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 Received: (qmail 15102 invoked by uid 48); 11 Jan 2014 12:30:53 -0000 From: "giecrilj at stegny dot 2a.pl" To: gcc-bugs@gcc.gnu.org Subject: [Bug libstdc++/59687] The description of ios::noreplace is hilarious Date: Sat, 11 Jan 2014 12:30:00 -0000 X-Bugzilla-Reason: CC X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: gcc X-Bugzilla-Component: libstdc++ X-Bugzilla-Version: 4.8.1 X-Bugzilla-Keywords: documentation X-Bugzilla-Severity: normal X-Bugzilla-Who: giecrilj at stegny dot 2a.pl X-Bugzilla-Status: UNCONFIRMED X-Bugzilla-Priority: P3 X-Bugzilla-Assigned-To: unassigned at gcc dot gnu.org X-Bugzilla-Target-Milestone: 4.9.0 X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: bug_status resolution Message-ID: In-Reply-To: References: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: http://gcc.gnu.org/bugzilla/ Auto-Submitted: auto-generated MIME-Version: 1.0 X-SW-Source: 2014-01/txt/msg01228.txt.bz2 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D59687 Christopher Yeleighton changed: What |Removed |Added ---------------------------------------------------------------------------- Status|RESOLVED |UNCONFIRMED Resolution|FIXED |--- --- Comment #4 from Christopher Yeleighton -= -- (In reply to Jonathan Wakely from comment #2) > Author: redi > Date: Fri Jan 10 14:30:27 2014 > New Revision: 206525 > trunk/libstdc++-v3/doc/xml/manual/backwards_compatibility.xml You: Because iostream modes correspond to fopen(3) modes these flags are not supported. Me: The implication is 1=E2=87=921, so this is formally valid. But correlation= is not causation; in this case, you have (fopen (path, "wx")) both implemented in = GNU and standardised. So your statement is misleading, at least for (noreplace= ). You: If you need to check for existence and open a file as a single operation then you will need to use OS-specific facilities outside the C++ standard library, such as open(2) Me: Maybe it would be worth mentioning how you can construct a stream from a fi= le descriptor so as to avoid a resource leak (the constructor must not throw f= or this scheme to work).=20=20 It seems (noreplace) is more important in practice than (nocreate). Now th= at it is standardised, could you consider providing (__noreplace) instead? See also Meta: I admit the bug is sort-of fixed but still I tentatively reopen to see if y= ou would reconsider the text given the remarks above. Please forgive me if it= is too much disruption for you. >>From gcc-bugs-return-440087-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Jan 11 12:55:40 2014 Return-Path: Delivered-To: listarch-gcc-bugs@gcc.gnu.org Received: (qmail 28959 invoked by alias); 11 Jan 2014 12:55:40 -0000 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 Delivered-To: mailing list gcc-bugs@gcc.gnu.org Received: (qmail 28940 invoked by uid 48); 11 Jan 2014 12:55:36 -0000 From: "redi at gcc dot gnu.org" To: gcc-bugs@gcc.gnu.org Subject: [Bug libstdc++/59687] The description of ios::noreplace is hilarious Date: Sat, 11 Jan 2014 12:55:00 -0000 X-Bugzilla-Reason: CC X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: gcc X-Bugzilla-Component: libstdc++ X-Bugzilla-Version: 4.8.1 X-Bugzilla-Keywords: documentation X-Bugzilla-Severity: normal X-Bugzilla-Who: redi at gcc dot gnu.org X-Bugzilla-Status: RESOLVED X-Bugzilla-Priority: P3 X-Bugzilla-Assigned-To: unassigned at gcc dot gnu.org X-Bugzilla-Target-Milestone: 4.9.0 X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: bug_status resolution Message-ID: In-Reply-To: References: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 7bit X-Bugzilla-URL: http://gcc.gnu.org/bugzilla/ Auto-Submitted: auto-generated MIME-Version: 1.0 X-SW-Source: 2014-01/txt/msg01229.txt.bz2 Content-length: 669 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59687 Jonathan Wakely changed: What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |RESOLVED Resolution|--- |FIXED --- Comment #5 from Jonathan Wakely --- I'm not spending any more time on documentation for features that we don't support, and that most compilers have not supported since last century. That chapter of the libstdc++ manual is not the place for people to learn how to write correct programs.