#include <QCoreApplication>
#include <QTextStream>
#include <QScopedPointer>

class Logger {

    QScopedPointer<QTextStream> stream;
public:

    class Log {
        QTextStream &stream;
    public:
        Log(QTextStream &strm, const char* type) :
            stream(strm)
        {
            stream << type << ":";
        }

        Log& operator << (const char* message) {
            stream << " " << message;
            return *this;
        }

        ~Log() {
            stream.flush();
        }
    };

    Logger() :
        stream(new QTextStream(stdout)) {}

    Log log() {
        return Log(*stream, "QWERTY");
    }
};

int main(int argc, char *argv[])
{
    QCoreApplication a(argc, argv);

    Logger logger;
    logger.log() << "AZAZA" << "AZAZA2" << "AZAZA3";

    return a.exec();
}