Can references or pointers be used in C++ methods called from QML/JavaScript?

[SteveG]

Can references (or possibly pointers) be used when a C++ method is called from a JavaScript function in QML or can only values be used? For example, my code works when I have
@
MyClass{
id: myclass
}

function mytest(){
myclass.test(["Value1", "Value2", "Value3"]);
}
@

in a QML file and
@
Q_INVOKABLE void test(QList<QString> arg);
@

in MyClass.h (with corresponding code in MyClass.cpp)

but it generates an error when I use &arg or *arg.

Must the return type of a C++ method also be a value or can references or pointers be used?

[sierdzio]

You can use pointers to QObjects. I don't think any other would work, apart from standard const references (const QString &blah).