Specify parameters of type registration in class declarations

Using this technique we can automatically register all necessary
revisions and minor versions of a type, using the metaobject system.
This greatly reduces the potential for mistakes and resulting
incompatibilities between versions of imports.

We assume that for each type we need to register all revisions of its
super types and its attached type, and that the revisions match. That
is, if you import version X of type A, you will also get version X of
its attached type and of any super types. As we previously didn't take
these dependencies into account when manually registering the types, a
number of extra revisions are now registered for some types.

Potentially, we can now generate the qmltypes files at compile time,
using moc.

Change-Id: I7abb8a5c39f5e63ad1a0cb41a783f2c91909491b
Reviewed-by: Fabian Kosmale <fabian.kosmale@qt.io>
Reviewed-by: Simon Hausmann <simon.hausmann@qt.io>

1 files changed, 5 insertions, 0 deletions

diff --git a/src/qml/qml/qqmlcomponentattached_p.h b/src/qml/qml/qqmlcomponentattached_p.h
index e3bca18857..8ecd9da17d 100644
--- a/src/qml/qml/qqmlcomponentattached_p.h
+++ b/src/qml/qml/qqmlcomponentattached_p.h
@@ -61,6 +61,11 @@ QT_BEGIN_NAMESPACE
 class Q_QML_PRIVATE_EXPORT QQmlComponentAttached : public QObject
 {
     Q_OBJECT
+
+    // Used as attached object for QQmlComponent. We want qqmlcomponentattached_p.h to be #include'd
+    // when registering QQmlComponent, but we cannot #include it from qqmlcomponent.h. Therefore we
+    // force an anonymous type registration here.
+    QML_ANONYMOUS
 public:
     QQmlComponentAttached(QObject *parent = nullptr);
     ~QQmlComponentAttached();