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diff --git a/src/qml/qml/qqmlpropertyindex_p.h b/src/qml/qml/qqmlpropertyindex_p.h
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+/****************************************************************************
+**
+** Copyright (C) 2016 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of the QtQml module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** 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 QQMLPROPERTYINDEX_P_H
+#define QQMLPROPERTYINDEX_P_H
+
+//
+//  W A R N I N G
+//  -------------
+//
+// This file is not part of the Qt API.  It exists purely as an
+// implementation detail.  This header file may change from version to
+// version without notice, or even be removed.
+//
+// We mean it.
+//
+
+#include <private/qglobal_p.h>
+
+QT_BEGIN_NAMESPACE
+
+class QQmlPropertyIndex
+{
+    qint32 index;
+
+public:
+    QQmlPropertyIndex()
+    { index = -1; }
+
+    static QQmlPropertyIndex fromEncoded(qint32 encodedIndex)
+    {
+        QQmlPropertyIndex idx;
+        idx.index = encodedIndex;
+        return idx;
+    }
+
+    explicit QQmlPropertyIndex(int coreIndex)
+    { index = encode(coreIndex, -1); }
+
+    explicit QQmlPropertyIndex(int coreIndex, int valueTypeIndex)
+        : index(encode(coreIndex, valueTypeIndex))
+    {}
+
+    bool isValid() const
+    { return index != -1; }
+
+    int coreIndex() const
+    {
+        if (index == -1)
+            return -1;
+        return index & 0xffff;
+    }
+
+    int valueTypeIndex() const
+    {
+        if (index == -1)
+            return -1;
+        return (index >> 16) - 1;
+    }
+
+    bool hasValueTypeIndex() const
+    {
+        if (index == -1)
+            return false;
+        return index >> 16;
+    }
+
+    qint32 toEncoded() const
+    { return index; }
+
+    int intValue() const
+    { return index; }
+
+    bool operator==(const QQmlPropertyIndex &other) const
+    { return index == other.index; }
+
+    bool operator!=(const QQmlPropertyIndex &other) const
+    { return !operator==(other); }
+
+private:
+    static qint32 encode(int coreIndex, int valueTypeIndex)
+    {
+        Q_ASSERT(coreIndex >= -1);
+        Q_ASSERT(coreIndex <= 0xffff);
+        Q_ASSERT(valueTypeIndex >= -1);
+        Q_ASSERT(valueTypeIndex < 0xffff);
+
+        if (coreIndex == -1)
+            return -1;
+        else
+            return coreIndex | ((valueTypeIndex + 1) << 16);
+    }
+};
+
+QT_END_NAMESPACE
+
+#endif // QQMLPROPERTYINDEX_P_H