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diff --git a/src/concurrent/qtconcurrenttask.h b/src/concurrent/qtconcurrenttask.h
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+/****************************************************************************
+**
+** Copyright (C) 2020 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of the QtConcurrent 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 QTCONCURRENTTASK_H
+#define QTCONCURRENTTASK_H
+
+#if !defined(QT_NO_CONCURRENT)
+
+#include <QtConcurrent/qtaskbuilder.h>
+
+QT_BEGIN_NAMESPACE
+
+#ifdef Q_CLANG_QDOC
+
+namespace QtConcurrent {
+
+template <class Task>
+[[nodiscard]]
+QTaskBuilder<Task> task(Task &&task);
+
+} // namespace QtConcurrent
+
+#else
+
+namespace QtConcurrent {
+
+template <class Task>
+[[nodiscard]]
+constexpr auto task(Task &&t) { return QTaskBuilder(std::forward<Task>(t)); }
+
+} // namespace QtConcurrent
+
+#endif // Q_CLANG_QDOC
+
+QT_END_NAMESPACE
+
+#endif // !defined(QT_NO_CONCURRENT)
+
+#endif // QTCONCURRENTTASK_H