On 7/28/13 8:45 PM, "Larry Evans" <cppljevans@suddenlink.net> wrote:

I thought the filtering_stream would be derived from std::ostream, at

Derived class of std::basic_istream, std::basic_ostream or

std::basic_iostream, used to perform filtering.

Did you not find this so, or do you needs require something more

specific than std::ostream& to be passed to the other functions you

Thanks! You would've thought that — and you know what? You would be CORRECT.

I thought I had tested every possible case — but I think I did that BEFORE discovering my error with closing the file before destructing the filtering_streambuf/filtering_ostream.

You (and everyone else) were ABSOLUTELY CORRECT. When I changed my code from a filtering_streambuf:

ofstream myXMLFile (destPath, std::ios_base::out | std::ios_base::app | std::ios_base::binary);

boost::iostreams::filtering_streambuf<boost::iostreams::output> filteringOStream;

filteringOStream.push(boost::iostreams::zlib_compressor());

filteringOStream.push(myXMLFile);

std::ostream myExportedXMLFilteringOStream(&filteringOStream);

Foo(myExportedXMLFilteringOStream);

TO A filtering_ostream:

ofstream myXMLFile (destPath, std::ios_base::out | std::ios_base::app | std::ios_base::binary);

boost::iostreams::filtering_ostream myExportedXMLFilteringOStream;

myExportedXMLFilteringOStream.push(boost::iostreams::zlib_compressor());

myExportedXMLFilteringOStream.push(myXMLFile);

Foo(myExportedXMLFilteringOStream);

Thank you so much for tying up that loose end! I'm assuming the filtering_ostream is of course more efficient than the filtering_streambuf scenario?