[Interest] Function overload and QML

[Federico Buti]

Hi list.

I've made an intensive use of INVOKABLE/SLOT  functions in QML and I've
never encounted any problem. Up until now.

I'm sure that function overloading works properly since I've used it a lot
(also the related commit can be found here
<https://qt.gitorious.org/qt/tmartsums-qt/commit/1d7b672fd46abab51a0124ad19aad18e5d14f1a8>).
However, I've noticed a strange behaviour by working with the
ArrayDataModel available here <https://github.com/dridk/ArrayDataModel>.

I've registered an instance of the model as a context property in the usual
way:

ArrayDataModel model;

engine.rootContext()->setContextProperty("model", &model);


Then in QML I've inserted a call to a SLOT in this way:

Button {

    text: "click me!"

    onClicked: {

        model.insert(model.size(), "Item " + (model.size() + 1));

    }

}


Theoretically, the method to be invoked by the runtime should be

    void insert (int i, const QVariant &value);


However, if I exchange position of overloaded functions, i.e. if I write
the header as
​​

    Q_SLOT void insert (int i, const QVariant &value);

    Q_SLOT void insert (int i, const QVariantList &values);


instead of the original

    Q_SLOT void insert (int i, const QVariantList &values);

    Q_SLOT void insert (int i, const QVariant &value);


the function which is called is (wrongly)



    Q_SLOT void insert (int i, const QVariantList &values);


​Is this
​ a BUG, an intended behaviour, a specific conversion JS <--> C++, e.g. the
parameter is seen as a single-item-array and made match with the wrong
overload? Or something else I cannot understand? :)
Thanks in advance for any insight,
F.

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