IOSTREAM question : should ends manipulator flush buffer?

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Article #4057

#4057

From: Stuart Maclean
Date: Tue, 16 Apr 1996 12:27

31 lines
1666 bytes

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-)

Any help gratefully appreciated.

Stuart

-- 
Stuart
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From: S.D.Maclean@ecs.soton.ac.uk (Stuart Maclean)
Message-ID: <sdm-1604961139410001@galois.ecs.soton.ac.uk>
X-Original-Date: Tue, 16 Apr 1996 11:39:41 +0000
Path: arc1-ca.pugleaf.net!in2.uu.net!bounce-back
Date: 16 Apr 96 12:27:03 GMT
Approved: fjh@cs.mu.oz.au
Newsgroups: comp.std.c++
Subject: IOSTREAM question : should ends manipulator flush buffer?
Organization: University of Southampton
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