diff options
| -rw-r--r-- | src/qml/qml/qqml.h | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/src/qml/qml/qqml.h b/src/qml/qml/qqml.h index 9eacc5bc22..ebf4817b4a 100644 --- a/src/qml/qml/qqml.h +++ b/src/qml/qml/qqml.h @@ -605,9 +605,12 @@ Q_QML_EXPORT void qmlRegisterModule(const char *uri, int versionMajor, int versi template<typename T> QObject *qmlAttachedPropertiesObject(const QObject *obj, bool create = true) { - QObject *mutableObj = const_cast<QObject *>(obj); - return qmlAttachedPropertiesObject( - mutableObj, qmlAttachedPropertiesFunction(mutableObj, &T::staticMetaObject), create); + // We don't need a concrete object to resolve the function. As T is a C++ type, it and all its + // super types should be registered as CppType (or not at all). We only need the object and its + // QML engine to resolve composite types. Therefore, the function is actually a static property + // of the C++ type system and we can cache it here for improved performance on further lookups. + static const auto func = qmlAttachedPropertiesFunction(nullptr, &T::staticMetaObject); + return qmlAttachedPropertiesObject(const_cast<QObject *>(obj), func, create); } Q_QML_EXPORT void qmlRegisterBaseTypes(const char *uri, int versionMajor, int versionMinor); |