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.)
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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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