[Boost-bugs] [Boost C++ Libraries] #4590: Flushing a filtering_ostream stopped working in Boost 1.44

Subject: [Boost-bugs] [Boost C++ Libraries] #4590: Flushing a filtering_ostream stopped working in Boost 1.44
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2010-08-25 10:28:24

#4590: Flushing a filtering_ostream stopped working in Boost 1.44
------------------------------+---------------------------------------------
 Reporter:  t0rt1e@…          |       Owner:  turkanis 
     Type:  Bugs              |      Status:  new      
Milestone:  To Be Determined  |   Component:  iostreams
  Version:  Boost 1.44.0      |    Severity:  Problem  
 Keywords:                    |  
------------------------------+---------------------------------------------
 Since the update to Boost 1.44, flushing an filtering_ostream containing
 an output_filter and a sink different from std::cout (tested
 boost::iostreams::back_inserter(std::string) and
 boost::test_tools::output_test_stream) using the flush() member function
 stopped working. The output string stays empty. This used to work until
 Boost 1.43.

 I tried to replace the call of flush() with the sync() member function
 documented in
 <http://www.boost.org/doc/libs/1_44_0/libs/iostreams/doc/classes/filtering_stream.html>,
 which leads to compiler error that filtering_ostream does not have this
 member function. Only using the member function strict_sync() flushes
 correctly the filtering_ostream in Boost 1.44.

 Attached is a test case based on the back_inserter example in
 <http://www.boost.org/doc/libs/1_44_0/libs/iostreams/doc/tutorial/container_sink.html>
 augmented by a transparent filter simplified from the code example in
 <http://www.boost.org/doc/libs/1_44_0/libs/iostreams/doc/concepts/output_filter.html>.

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/4590>
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