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++ // Copyright (C) 2020 Klarälvdalens Datakonsult AB, a KDAB Group company, info@kdab.com, author Giuseppe D'Angelo <giuseppe.dangelo@kdab.com>
++ // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
++ // Qt-Security score:significant reason:default
++
++ #ifndef QCOMPARE_IMPL_H
++ #define QCOMPARE_IMPL_H
++
++ #if 0
++ #pragma qt_sync_skip_header_check
++ #pragma qt_sync_stop_processing
++ #endif
++
++ #include <QtCore/qtconfigmacros.h>
++ #include <QtCore/qcompilerdetection.h>
++
++ #include <type_traits>
++
++ QT_BEGIN_NAMESPACE
++
++ namespace QtPrivate {
++
++ // [cmp.categories.pre] / 3, but using a safe bool trick
++ // and also rejecting std::nullptr_t (unlike the example)
++ class CompareAgainstLiteralZero {
++ public:
++ using SafeZero = void (CompareAgainstLiteralZero::*)();
++ Q_IMPLICIT constexpr CompareAgainstLiteralZero(SafeZero) noexcept {}
++
++ template <typename T, std::enable_if_t<std::is_null_pointer_v<T>, bool> = true>
++ CompareAgainstLiteralZero(T) = delete;
++ };
++
++ } // namespace QtPrivate
++
++ QT_END_NAMESPACE
++
++ #endif // QCOMPARE_IMPL_H