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diff --git a/sources/shiboken2/libshiboken/typeresolver.h b/sources/shiboken2/libshiboken/typeresolver.h
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+/****************************************************************************
+**
+** Copyright (C) 2016 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of PySide2.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 3 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL3 included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU Lesser General Public License version 3 requirements
+** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 2.0 or (at your option) the GNU General
+** Public license version 3 or any later version approved by the KDE Free
+** Qt Foundation. The licenses are as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-2.0.html and
+** https://www.gnu.org/licenses/gpl-3.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef TYPERESOLVER_H
+#define TYPERESOLVER_H
+
+#include "shibokenmacros.h"
+#include "conversions.h"
+
+namespace Shiboken
+{
+
+/* To C++ convertion functions. */
+template <typename T>
+inline void pythonToValueType(PyObject* pyobj, void** data)
+{
+    *reinterpret_cast<T*>(*data) = Shiboken::Converter<T>::toCpp(pyobj);
+}
+
+template <typename T>
+inline void pythonToObjectType(PyObject* pyobj, void** data)
+{
+    *reinterpret_cast<T**>(*data) = Shiboken::Converter<T*>::toCpp(pyobj);
+}
+
+template <typename T>
+inline PyObject* objectTypeToPython(void* cptr)
+{
+    return Shiboken::Converter<T*>::toPython(*reinterpret_cast<T**>(cptr));
+}
+
+template <typename T>
+inline PyObject* referenceTypeToPython(void* cptr)
+{
+    // cptr comes the same way it come when we have a value type, but
+    // we deliver a Python object of a reference
+    return Shiboken::Converter<T&>::toPython(*reinterpret_cast<T*>(cptr));
+}
+
+/**
+*   \internal This function is not part of the public API.
+*   Initialize the TypeResource internal cache.
+*/
+void initTypeResolver();
+
+class LIBSHIBOKEN_API TypeResolver
+{
+public:
+    enum Type
+    {
+        ObjectType,
+        ValueType,
+        UnknownType
+    };
+
+    typedef PyObject* (*CppToPythonFunc)(void*);
+    typedef void (*PythonToCppFunc)(PyObject*, void**);
+
+    ~TypeResolver();
+
+    template<typename T>
+    static TypeResolver* createValueTypeResolver(const char* typeName)
+    {
+        return createTypeResolver(typeName, &Shiboken::Converter<T>::toPython, &pythonToValueType<T>, SbkType<T>());
+    }
+
+    template<typename T>
+    static TypeResolver* createObjectTypeResolver(const char* typeName)
+    {
+        return createTypeResolver(typeName, &objectTypeToPython<T>, &pythonToObjectType<T>, SbkType<T>());
+    }
+
+    /**
+     * This kind of type resolver is used only when we have a signal with a reference in their arguments
+     * like on QSqlTableModel::primeInsert.
+     */
+    template<typename T>
+    static TypeResolver* createReferenceTypeResolver(const char* typeName)
+    {
+        return createTypeResolver(typeName, &referenceTypeToPython<T>, &pythonToValueType<T>, SbkType<T>());
+    }
+
+    static Type getType(const char* name);
+    static TypeResolver* get(const char* typeName);
+
+    PyObject* toPython(void* cppObj);
+    void toCpp(PyObject* pyObj, void** place);
+    PyTypeObject* pythonType();
+
+private:
+    struct TypeResolverPrivate;
+    TypeResolverPrivate* m_d;
+
+    TypeResolver();
+    // disable object copy
+    TypeResolver(const TypeResolver&);
+    TypeResolver& operator=(const TypeResolver&);
+
+    static TypeResolver* createTypeResolver(const char* typeName, CppToPythonFunc cppToPy, PythonToCppFunc pyToCpp, PyTypeObject* pyType);
+};
+}
+
+#endif