Revision control
++ // Copyright (C) 2014 Klaralvdalens Datakonsult AB (KDAB).
++ // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
++
++ #ifndef QT3DCORE_QNODEID_H
++ #define QT3DCORE_QNODEID_H
++
++ #include <Qt3DCore/qt3dcore_global.h>
++ #include <QtCore/QDebug>
++ #include <QtCore/QHashFunctions>
++
++ QT_BEGIN_NAMESPACE
++
++ namespace Qt3DCore {
++
++ class QNodeId
++ {
++ constexpr explicit QNodeId(quint64 i) noexcept
++ : m_id(i)
++ {}
++ public:
++ constexpr QNodeId() noexcept
++ : m_id(0)
++ {}
++
++ Q_3DCORESHARED_EXPORT static QNodeId createId() noexcept;
++
++ constexpr bool isNull() const noexcept
++ {
++ return m_id == 0;
++ }
++
++ constexpr bool operator ==(QNodeId other) const noexcept
++ {
++ return other.m_id == m_id;
++ }
++
++ constexpr bool operator !=(QNodeId other) const noexcept
++ {
++ return !operator ==(other);
++ }
++
++ constexpr bool operator <(QNodeId other) const noexcept
++ {
++ return m_id < other.m_id;
++ }
++
++ constexpr bool operator >(QNodeId other) const noexcept
++ {
++ return m_id > other.m_id;
++ }
++
++ constexpr quint64 id() const noexcept
++ {
++ return m_id;
++ }
++
++ constexpr operator bool() const noexcept
++ {
++ return m_id != 0;
++ }
++
++ private:
++ quint64 m_id;
++ };
++ QT3D_DECLARE_TYPEINFO(Qt3DCore, QNodeId, Q_PRIMITIVE_TYPE)
++
++ using QNodeIdVector = QList<QNodeId>;
++
++ #ifndef QT_NO_DEBUG_STREAM
++ Q_3DCORESHARED_EXPORT QDebug operator<<(QDebug d, QNodeId id);
++ #endif
++
++ //! [nodeid-qhash]
++ inline constexpr size_t qHash(QNodeId id, size_t seed = 0) noexcept
++ {
++ using QT_PREPEND_NAMESPACE(qHash);
++ return qHash(id.id(), seed);
++ }
++
++ } // Qt3DCore
++
++ QT_END_NAMESPACE
++
++ Q_DECLARE_METATYPE(Qt3DCore::QNodeId) // LCOV_EXCL_LINE
++
++
++ #endif // QT3DCORE_QNODEID_H