qt5base-lts/tests/auto/tools/moc/grand-parent-gadget-class.h

// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0

#ifndef GRANDPARENTGADGETCLASS_H
#define GRANDPARENTGADGETCLASS_H

#include <QtCore/qobjectdefs.h>

namespace GrandParentGadget {

struct BaseGadget { Q_GADGET };
struct Derived : BaseGadget {};
struct DerivedGadget : Derived { Q_GADGET };
template<typename T> struct CRTP : BaseGadget {};
struct CRTPDerivedGadget : CRTP<CRTPDerivedGadget> { Q_GADGET };
}

#endif // GRANDPARENTGADGETCLASS_H
Use SPDX license identifiers Replace the current license disclaimer in files by a SPDX-License-Identifier. Files that have to be modified by hand are modified. License files are organized under LICENSES directory. Task-number: QTBUG-67283 Change-Id: Id880c92784c40f3bbde861c0d93f58151c18b9f1 Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org> Reviewed-by: Lars Knoll <lars.knoll@qt.io> Reviewed-by: Jörg Bornemann <joerg.bornemann@qt.io> 2022-05-10 10:06:48 +00:00			`// Copyright (C) 2016 The Qt Company Ltd.`
			`// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0`
moc: Don't link to inexistent parent staticMetaObject Contrarily to Q_OBJECTs, Q_GADGETs are not guaranteed to descend from a Q_GADGET. Here, we ensure that if the first superclass is a Q_GADGET, then the derived class will be treated as one. This allows gaps in the Q_GADGET hierarchy while preventing from trying to link to the inexistent staticMetaObject if there's no such ancestor. Change-Id: If10fb952e23655102a425bb18fe8babaf447a47f Reviewed-by: Olivier Goffart <ogoffart@woboq.com> Reviewed-by: Jędrzej Nowacki <jedrzej.nowacki@theqtcompany.com> 2015-01-12 14:55:13 +00:00
			`#ifndef GRANDPARENTGADGETCLASS_H`
			`#define GRANDPARENTGADGETCLASS_H`

			`#include <QtCore/qobjectdefs.h>`

			`namespace GrandParentGadget {`

			`struct BaseGadget { Q_GADGET };`
			`struct Derived : BaseGadget {};`
			`struct DerivedGadget : Derived { Q_GADGET };`
Support Q_GADGET QMetaObject super class hierarchies across templates This patch fixes the QMetaObject::superClass hierarchy for Q_GADGETs that inherit from a template which in turn inherits another Q_GADGET. One common scenario where this is applied is for the CRTP. Without this patch, moc would stop at the template and then sets the superClass QMetaObject to a nullptr. For QObjects this works, since there moc knows that every child must by definition inherit QObject. In order to support this for Q_GADGETs too, we defer the judgment about the availability of a staticMetaObject in the base class to compile time through the existing QtPrivate::MetaObjectForType<Base>::value() helper. [ChangeLog][QtCore][moc] Moc now correctly sets a non-null QMetaObject::superClass for Q_GADGETs that inherit from a template which inherits another Q_GADGET. Change-Id: I103b5efd74ed24172dffce477ca2ed6d0f374d44 Reviewed-by: Olivier Goffart (Woboq GmbH) <ogoffart@woboq.com> 2019-04-12 11:21:44 +00:00			`template<typename T> struct CRTP : BaseGadget {};`
			`struct CRTPDerivedGadget : CRTP<CRTPDerivedGadget> { Q_GADGET };`
moc: Don't link to inexistent parent staticMetaObject Contrarily to Q_OBJECTs, Q_GADGETs are not guaranteed to descend from a Q_GADGET. Here, we ensure that if the first superclass is a Q_GADGET, then the derived class will be treated as one. This allows gaps in the Q_GADGET hierarchy while preventing from trying to link to the inexistent staticMetaObject if there's no such ancestor. Change-Id: If10fb952e23655102a425bb18fe8babaf447a47f Reviewed-by: Olivier Goffart <ogoffart@woboq.com> Reviewed-by: Jędrzej Nowacki <jedrzej.nowacki@theqtcompany.com> 2015-01-12 14:55:13 +00:00			`}`

			`#endif // GRANDPARENTGADGETCLASS_H`