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++ // Copyright (C) 2019 The Qt Company Ltd.
++ // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only
++ // Qt-Security score:significant reason:default
++
++
++ #ifndef QQUICK3DUTILS_P_H
++ #define QQUICK3DUTILS_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 <type_traits>
++
++ #include <QtCore/QtGlobal>
++ #include <private/qglobal_p.h>
++
++ QT_BEGIN_NAMESPACE
++
++ template <typename T, typename = void>
++ struct hasFuzzyCompare : std::false_type {};
++
++ template <typename T>
++ struct hasFuzzyCompare<T, std::void_t<decltype(qFuzzyCompare(std::declval<T &>(), std::declval<T &>()))>> : std::true_type {};
++
++ // Assigns 'updated' to 'orig' and returns true if they are different
++ template <typename T, std::enable_if_t<!hasFuzzyCompare<T>::value, bool> = true>
++ bool qUpdateIfNeeded(T &orig, T updated)
++ {
++ if (orig == updated)
++ return false;
++ orig = updated;
++ return true;
++ }
++
++ // Assigns 'updated' to 'orig' and returns true if they are different, compared with qFuzzyCompare
++ template <typename T, std::enable_if_t<hasFuzzyCompare<T>::value, bool> = true>
++ bool qUpdateIfNeeded(T &orig, T updated)
++ {
++ if (qFuzzyCompare(orig, updated))
++ return false;
++ orig = updated;
++ return true;
++ }
++
++ QT_END_NAMESPACE
++
++ #endif // QQUICK3DUTILS_P_H