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/****************************************************************************
**
** Copyright (C) 2022 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the QtQml module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:COMM$
**
** 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.
**
** $QT_END_LICENSE$
**
**
**
**
**
**
**
**
**
**
**
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**
**/
#ifndef QQMLDOMFUNCTIONREF_P_H
#define QQMLDOMFUNCTIONREF_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 <functional>
// function_ref has been proposed for the C++20 standard, see
// http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2018/p0792r2.html
// uses it if available, replace it with a const ref to std::function otherwise
#ifndef __cpp_lib_function_ref
QT_BEGIN_NAMESPACE
namespace QQmlJS {
namespace Dom {
template <typename T>
using function_ref = const std::function<T> &;
} // namespace Dom
} // namespace QQmlJS
QT_END_NAMESPACE
#else
QT_BEGIN_NAMESPACE
namespace QQmlJS {
namespace Dom {
using std::function_ref;
} // namespace Dom
} // namespace QQmlJS
QT_END_NAMESPACE
#endif // __cpp_lib_function_ref
#endif // QQMLDOMFUNCTIONREF_P_H
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