Is there a null std::ostream implementation in C++ or libraries?

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If you have boost, then there’s a null ostream & istream implementation available in boost/iostreams/device/null.hpp . The gist of it:

#include "boost/iostreams/stream.hpp"
#include "boost/iostreams/device/null.hpp"
...
boost::iostreams::stream< boost::iostreams::null_sink > nullOstream( ( boost::iostreams::null_sink() ) );
...

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