As a developer, I want to expose non-QObject data structures to QJSEngine

In QtScript there’s the qScriptRegisterMetaType() function that registers custom types using custom conversion functions. This would allow me to register the following class for example:

class Point3D {
 
    public:
        int x;
        int y;
        int z;
 
        Point3D() = default;
        Point3D(int x, int y, int z);
 
        bool operator==(const Point3D &other) const;
        bool operator!=(const Point3D &other) const;
 
        Point3D operator+(const Vector3D &vector) const;
        Point3D operator-(const Vector3D &vector) const;
 
        Vector3D operator-(const Point3D &other) const;
 
        QString toString() const;
 
        static QScriptValue toScriptValue(QScriptEngine *engine, const Point3D &point);
        static void fromScriptValue(const QScriptValue &object, Point3D &point);
};

The last two functions were passed to qScriptRegisterMetaType() and would do the actual conversion, which in this case converted the point to a JS array with 3 elements. Important to note is that the Point3D class does not inherit from QObject; it’s a POD.

I believe the above use-case should be enabled using QJSEngine.

Converting all types to QObject is really not an option for me and to make matters worse, I even have some QObject-based classes that will still need custom conversion functions as the conversion is more complex than a simple call to QJSEngine::newQObject(). Therefore I really need an equivalent to qScriptRegisterMetaType() that will work with QJSEngine.