Steps to reproduce

1. Build the Simple Example (ActiveQt) https://doc.qt.io/qt-6/activeqt-activeqt-simple-example.html
2. Run dumpcpp on simpleaxDebug.tlb (or simpleaxRelease.tlb)

Outcomes

Both Qt 6.8.3 and 6.9.0 produces this in simpleaxlib.h:

namespace simpleaxLib {
    enum FocusPolicy { /*...*/ };
}

Qt 6.8.3 produces this in simpleaxlib.cpp (Compilable):

QtPrivate::TypeAndForceComplete<simpleaxLib::FocusPolicy, std::true_type>

Qt 6.9.0 changes the above to this (Uncompilable):

QtMocHelpers::EnumData<FocusPolicy>(3, 3, QMC::EnumFlags{}).add({ /*...*/ })

How to fix

• QtMocHelpers::EnumData<FocusPolicy> -> QtMocHelpers::EnumData<simpleaxLib::FocusPolicy> (ditto for QtMocHelpers::PropertyData)
• QtMocHelpers::SignalData<void(FocusPolicy)> -> QtMocHelpers::SignalData<void(simpleaxLib::FocusPolicy)> (ditto for QtMocHelpers::SlotData)

Note: The fixes above are enough for the customer's real *.tlb file, which is all we really care about. However, simpleaxlib.cpp will still remain uncompilable because of QTBUG-134098