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- Path: engnews1.Eng.Sun.COM!taumet!clamage
- From: kanze@lts.sel.alcatel.de (James Kanze US/ESC 60/3/141 #40763)
- Newsgroups: comp.std.c++
- Subject: Re: IOSTREAM question : should ends manipulator flush buffer?
- Date: 17 Apr 1996 14:57:41 GMT
- Organization: GABI Software, Sarl.
- Sender: news@lts.sel.alcatel.de
- Approved: clamage@eng.sun.com (comp.std.c++)
- Message-ID: <KANZE.96Apr17120619@slsvgqt.lts.sel.alcatel.de>
- References: <sdm-1604961139410001@galois.ecs.soton.ac.uk>
- NNTP-Posting-Host: taumet.eng.sun.com
- In-Reply-To: S.D.Maclean@ecs.soton.ac.uk's message of 16 Apr 96 12:27:03 GMT
- Apparently-To: std-c++@ncar.ucar.edu
- Content-Length: 1390
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- Originator: clamage@taumet
-
- In article <sdm-1604961139410001@galois.ecs.soton.ac.uk>
- S.D.Maclean@ecs.soton.ac.uk (Stuart Maclean) writes:
-
- |> Hi, I'm currently implementing a stream class where the external
- |> representation is a socket. Whilst playing with the following
-
- |> TCPSocket tcp;
- |> ....
- |> Sockstream ss( tcp );
-
- |> ss << "Hello World!" << endl;
- |> ss << "Hello World!" << ends;
-
- |> I noticed that manipulator "endl" synchronises with the external
- |> representation, but "ends" does not. Tracing our IOStream library,
- |> libg++-2.7.1, it indeed does not do a flush when using "ends". In C++PL2
- |> by Stroustrup, page 348 has a comment implying that "ends" should do a
- |> flush.
-
- |> Does anyone know the correct behaviour for "ends" in the Standard C++
- |> Library, whatever that is and whenever it may appear 8-)
-
- The draft standard says nothing about a possible flush.
-
- Given that ends means end of *string*, and the flush function is a
- no-op in ostringstream, it's possible that the standards committee
- simply felt that it wasn't necessary. (It's also possible that this is
- an oversight in the draft.)
- --
- James Kanze Tel.: (+33) 88 14 49 00 email: kanze@gabi-soft.fr
- GABI Software, Sarl., 8 rue des Francs-Bourgeois, F-67000 Strasbourg, France
- Conseils, Θtudes et rΘalisations en logiciel orientΘ objet --
- -- A la recherche d'une activitΘ dans une region francophone
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