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diff --git a/src/corelib/text/qcollator_p.h b/src/corelib/text/qcollator_p.h
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+/****************************************************************************
+**
+** Copyright (C) 2016 The Qt Company Ltd.
+** Copyright (C) 2013 Aleix Pol Gonzalez <aleixpol@kde.org>
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of the QtCore 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 QCOLLATOR_P_H
+#define QCOLLATOR_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 <QtCore/private/qglobal_p.h>
+#include "qcollator.h"
+#include <QVector>
+#if QT_CONFIG(icu)
+#include <unicode/ucol.h>
+#elif defined(Q_OS_OSX)
+#include <CoreServices/CoreServices.h>
+#elif defined(Q_OS_WIN)
+#include <qt_windows.h>
+#endif
+
+QT_BEGIN_NAMESPACE
+
+#if QT_CONFIG(icu)
+typedef UCollator *CollatorType;
+typedef QByteArray CollatorKeyType;
+const CollatorType NoCollator = nullptr;
+
+#elif defined(Q_OS_OSX)
+typedef CollatorRef CollatorType;
+typedef QVector<UCCollationValue> CollatorKeyType;
+const CollatorType NoCollator = 0;
+
+#elif defined(Q_OS_WIN)
+typedef QString CollatorKeyType;
+typedef int CollatorType;
+const CollatorType NoCollator = 0;
+#  ifdef Q_OS_WINRT
+#    define USE_COMPARESTRINGEX
+#  endif
+
+#else // posix - ignores CollatorType collator, only handles system locale
+typedef QVector<wchar_t> CollatorKeyType;
+typedef bool CollatorType;
+const CollatorType NoCollator = false;
+#endif
+
+class QCollatorPrivate
+{
+public:
+    QAtomicInt ref = 1;
+    QLocale locale;
+#if defined(Q_OS_WIN) && !QT_CONFIG(icu)
+#ifdef USE_COMPARESTRINGEX
+    QString localeName;
+#else
+    LCID localeID;
+#endif
+#endif
+    Qt::CaseSensitivity caseSensitivity = Qt::CaseSensitive;
+    bool numericMode = false;
+    bool ignorePunctuation = false;
+    bool dirty = true;
+
+    CollatorType collator = NoCollator;
+
+    QCollatorPrivate(const QLocale &locale) : locale(locale) {}
+    ~QCollatorPrivate() { cleanup(); }
+    bool isC() { return locale.language() == QLocale::C; }
+
+    void clear() {
+        cleanup();
+        collator = NoCollator;
+    }
+
+    // Implemented by each back-end, in its own way:
+    void init();
+    void cleanup();
+
+private:
+    Q_DISABLE_COPY_MOVE(QCollatorPrivate)
+};
+
+class QCollatorSortKeyPrivate : public QSharedData
+{
+    friend class QCollator;
+public:
+    template <typename...T>
+    explicit QCollatorSortKeyPrivate(T &&...args)
+        : QSharedData()
+        , m_key(std::forward<T>(args)...)
+    {
+    }
+
+    CollatorKeyType m_key;
+
+private:
+    Q_DISABLE_COPY_MOVE(QCollatorSortKeyPrivate)
+};
+
+
+QT_END_NAMESPACE
+
+#endif // QCOLLATOR_P_H