[solved] two operators with the same input?
I'm trying the new Qt5 json feature. I found that there are two  operators defined for QJsonObject.
My understanding is that c++ doesn't allow this, because there is no way to tell which one is the one you want to call. They both have the same function name "operator" and parameter. But things can compile.
- QJsonValue QJsonObject::operator(const QString & key) const
- QJsonValueRef QJsonObject::operator(const QString & key)
now, I want to call the first  operator. I call it like this: jsonObj["key name"]; but what I actually call is the second operator, I get QJsonValueRef instead of QJsonValue.
How do I call the first operator?
ok, found answer myself: