1 files changed, 35 insertions, 0 deletions
diff --git a/sources/pyside6/libpyside/pysideqmetatype.h b/sources/pyside6/libpyside/pysideqmetatype.h
new file mode 100644
index 000000000..3782dc3bb
--- /dev/null
+++ b/sources/pyside6/libpyside/pysideqmetatype.h
@@ -0,0 +1,35 @@
+// Copyright (C) 2021 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
+
+#ifndef PYSIDEQMETATYPE_H
+#define PYSIDEQMETATYPE_H
+
+#include <QtCore/QMetaType>
+
+namespace PySide
+{
+
+/// If the type \p T was registered on Qt meta type system with Q_DECLARE_METATYPE macro,
+/// this class will initialize the meta type.
+///
+/// Initialize a meta type means register it on Qt meta type system, Qt itself only do this
+/// on the first call of qMetaTypeId, and this is exactly what we do to init it. If we don't
+/// do that, calls to QMetaType::type("QMatrix2x2") could return zero, causing QVariant to
+/// not recognize some C++ types, like QMatrix2x2.
+
+template<typename T, bool OK = QMetaTypeId<T>::Defined >
+struct initQtMetaType {
+    initQtMetaType()
+    {
+        qMetaTypeId<T>();
+    }
+};
+
+// Template specialization to do nothing when the type wasn't registered on Qt meta type system.
+template<typename T>
+struct initQtMetaType<T, false> {
+};
+
+} //namespace PySide
+
+#endif // PYSIDEQMETATYPE_H