gistfile1.cpp

// istreamLikeClass is

boost::iostreams::filtering_streambuf<boost::iostreams::input> in;
                        
boost::iostreams::gzip_decompressor decompressor;
                        
in.push(decompressor);
in.push(is);

stringstream ss (stringstream::in | stringstream::out);
                        
boost::iostreams::copy(in, ss);
                        
string parsedString = ss.str();