Overloading + operator in QString

[harvey_slash]

I want to overload the + operator for my mainwindow class(or any other class) for Qstring. this is what I have done so far :

QString operator+(QString a,QString b)
{
    qDebug()<<"works";
}

QString operator+(QString a,QString b)
{
    qDebug()<<"works";
}

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but the thing is, the QString + operator is already overloaded(to concatenate, I guess). so, if I use the above code, it results in ambiguity(both the signatures are same). how do I override the actual function to my own function without making a new class to hold QString?