QDoc should automatically detect QML properties defined in C++ as readonly

Consider this class

class Foo : public QObject {
    Q_OBJECT
    Q_PROPERTY(int x READ X CONSTANT)
    Q_PROPERTY(int y READ X CONSTANT)
};

/*!
 * \qmltype Foo
 *
 */

/*!
 * \qmlproperty int Foo::x
 * \readonly
 */

/*!
 * \qmlproperty int Foo::y
 */ 

Both x and y are read-only properties, however only x shows up as such in the documentation, because it is marked as such. It would be nice if qdoc automatically detected the lack of WRITE in the property declaration for y and mark it as read-only automatically.