Make QML composite types inherit enums

Problem: in Qt Quick Controls 2, enums declared in the abstract
C++ base types were not accessible with the concrete QML type name,
but had to be referenced using the base type name:

    Slider {
        snapMode: AbstractSlider.SnapOnRelease
    }

Solution: this change resolves the C++ base type and creates the
missing link between the composite type and its base type's meta-
object. This allows referencing enums using the concrete/composite
QML type name:

    Slider {
        snapMode: Slider.SnapOnRelease
    }

Change-Id: Icefdec91b012b12728367fd54b4d16796233ee12
Task-number: QTBUG-43582
Reviewed-by: Simon Hausmann <simon.hausmann@theqtcompany.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/src/qml/compiler/qqmltypecompiler_p.h b/src/qml/compiler/qqmltypecompiler_p.h
index cbc68280b7..09ef7aad67 100644
--- a/src/qml/compiler/qqmltypecompiler_p.h
+++ b/src/qml/compiler/qqmltypecompiler_p.h
@@ -273,6 +273,7 @@ public:
     bool validate();
 
     const QQmlImports &imports() const;
+    QQmlEnginePrivate *engine() const { return enginePrivate; }
 
 private:
     bool validateObject(int objectIndex, const QV4::CompiledData::Binding *instantiatingBinding, bool populatingValueTypeGroupProperty = false) const;