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/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the QtCore module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** 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.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 3 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL3 included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 3 requirements
** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 2.0 or (at your option) the GNU General
** Public license version 3 or any later version approved by the KDE Free
** Qt Foundation. The licenses are as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-2.0.html and
** https://www.gnu.org/licenses/gpl-3.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef Q_QDOC
#ifndef QOBJECT_H
#error Do not include qobject_impl.h directly
#endif
#if 0
#pragma qt_sync_skip_header_check
#pragma qt_sync_stop_processing
#endif
QT_BEGIN_NAMESPACE
namespace QtPrivate {
/*
Logic to statically generate the array of qMetaTypeId
ConnectionTypes<FunctionPointer<Signal>::Arguments>::types() returns an array
of int that is suitable for the types arguments of the connection functions.
The array only exist of all the types are declared as a metatype
(detected using the TypesAreDeclaredMetaType helper struct)
If one of the type is not declared, the function return 0 and the signal
cannot be used in queued connection.
*/
template <typename ArgList> struct TypesAreDeclaredMetaType { enum { Value = false }; };
template <> struct TypesAreDeclaredMetaType<List<>> { enum { Value = true }; };
template <typename Arg, typename... Tail> struct TypesAreDeclaredMetaType<List<Arg, Tail...> >
{ enum { Value = QMetaTypeId2<Arg>::Defined && TypesAreDeclaredMetaType<List<Tail...>>::Value }; };
template <typename ArgList, bool Declared = TypesAreDeclaredMetaType<ArgList>::Value > struct ConnectionTypes
{ static const int *types() { return Q_NULLPTR; } };
template <> struct ConnectionTypes<List<>, true>
{ static const int *types() { return Q_NULLPTR; } };
template <typename... Args> struct ConnectionTypes<List<Args...>, true>
{ static const int *types() { static const int t[sizeof...(Args) + 1] = { (QtPrivate::QMetaTypeIdHelper<Args>::qt_metatype_id())..., 0 }; return t; } };
// implementation of QSlotObjectBase for which the slot is a static function
// Args and R are the List of arguments and the returntype of the signal to which the slot is connected.
template<typename Func, typename Args, typename R> class QStaticSlotObject : public QSlotObjectBase
{
typedef QtPrivate::FunctionPointer<Func> FuncType;
Func function;
static void impl(int which, QSlotObjectBase *this_, QObject *r, void **a, bool *ret)
{
switch (which) {
case Destroy:
delete static_cast<QStaticSlotObject*>(this_);
break;
case Call:
FuncType::template call<Args, R>(static_cast<QStaticSlotObject*>(this_)->function, r, a);
break;
case Compare: // not implemented
case NumOperations:
Q_UNUSED(ret);
}
}
public:
explicit QStaticSlotObject(Func f) : QSlotObjectBase(&impl), function(f) {}
};
}
QT_END_NAMESPACE
#endif
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