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qt6windows7/tests/auto/dbus/qdbusmarshall/common.h
kleuter 85d238dfda qt 6.5.1 original
2023-10-29 23:33:08 +01:00

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// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
#include <QtGlobal>
#include <QMap>
#include <QString>
#include <QVariant>
#include <QDateTime>
#include <QLine>
#include <QDBusObjectPath>
#include <QDBusSignature>
#include <QDBusUnixFileDescriptor>
#include <QDBusArgument>
#include <QDBusMetaType>
#ifdef Q_OS_UNIX
# include <private/qcore_unix_p.h>
static bool compareFileDescriptors(int fd1, int fd2)
{
QT_STATBUF st1, st2;
if (QT_FSTAT(fd1, &st1) == -1 || QT_FSTAT(fd2, &st2) == -1) {
perror("fstat");
return false;
}
return (st1.st_dev == st2.st_dev) && (st1.st_ino == st2.st_ino);
}
#endif
typedef QMap<int, QString> IntStringMap;
typedef QMap<QString, QString> StringStringMap;
typedef QMap<QDBusObjectPath, QString> ObjectPathStringMap;
typedef QMap<qlonglong, QDateTime> LLDateTimeMap;
typedef QMap<QDBusSignature, QString> SignatureStringMap;
Q_DECLARE_METATYPE(StringStringMap)
Q_DECLARE_METATYPE(LLDateTimeMap)
static bool compare(const QDBusUnixFileDescriptor &t1, const QDBusUnixFileDescriptor &t2)
{
int fd1 = t1.fileDescriptor();
int fd2 = t2.fileDescriptor();
if ((fd1 == -1 || fd2 == -1) && fd1 != fd2) {
// one is valid, the other isn't
return false;
}
#ifdef Q_OS_UNIX
return compareFileDescriptors(fd1, fd2);
#else
return true;
#endif
}
struct MyStruct
{
int i;
QString s;
inline bool operator==(const MyStruct &other) const
{ return i == other.i && s == other.s; }
};
Q_DECLARE_METATYPE(MyStruct)
QDBusArgument &operator<<(QDBusArgument &arg, const MyStruct &ms)
{
arg.beginStructure();
arg << ms.i << ms.s;
arg.endStructure();
return arg;
}
const QDBusArgument &operator>>(const QDBusArgument &arg, MyStruct &ms)
{
arg.beginStructure();
arg >> ms.i >> ms.s;
arg.endStructure();
return arg;
}
struct MyVariantMapStruct
{
QString s;
QVariantMap map;
inline bool operator==(const MyVariantMapStruct &other) const
{ return s == other.s && map == other.map; }
};
Q_DECLARE_METATYPE(MyVariantMapStruct)
QDBusArgument &operator<<(QDBusArgument &arg, const MyVariantMapStruct &ms)
{
arg.beginStructure();
arg << ms.s << ms.map;
arg.endStructure();
return arg;
}
const QDBusArgument &operator>>(const QDBusArgument &arg, MyVariantMapStruct &ms)
{
arg.beginStructure();
arg >> ms.s >> ms.map;
arg.endStructure();
return arg;
}
struct MyFileDescriptorStruct
{
QDBusUnixFileDescriptor fd;
inline bool operator==(const MyFileDescriptorStruct &other) const
{ return compare(fd, other.fd); }
};
Q_DECLARE_METATYPE(MyFileDescriptorStruct)
QDBusArgument &operator<<(QDBusArgument &arg, const MyFileDescriptorStruct &ms)
{
arg.beginStructure();
arg << ms.fd;
arg.endStructure();
return arg;
}
const QDBusArgument &operator>>(const QDBusArgument &arg, MyFileDescriptorStruct &ms)
{
arg.beginStructure();
arg >> ms.fd;
arg.endStructure();
return arg;
}
void commonInit()
{
qDBusRegisterMetaType<QList<QDateTime> >();
qDBusRegisterMetaType<QList<QStringList> >();
qDBusRegisterMetaType<QList<QByteArray> >();
qDBusRegisterMetaType<QList<QList<bool> > >();
qDBusRegisterMetaType<QList<QList<short> > >();
qDBusRegisterMetaType<QList<QList<ushort> > >();
qDBusRegisterMetaType<QList<QList<int> > >();
qDBusRegisterMetaType<QList<QList<uint> > >();
qDBusRegisterMetaType<QList<QList<qlonglong> > >();
qDBusRegisterMetaType<QList<QList<qulonglong> > >();
qDBusRegisterMetaType<QList<QList<double> > >();
qDBusRegisterMetaType<QList<QList<QDBusObjectPath> > >();
qDBusRegisterMetaType<QList<QList<QDBusSignature> > >();
qDBusRegisterMetaType<QList<QVariantList> >();
qDBusRegisterMetaType<QMap<int, QString> >();
qDBusRegisterMetaType<QMap<QString, QString> >();
qDBusRegisterMetaType<QMap<QDBusObjectPath, QString> >();
qDBusRegisterMetaType<QMap<qlonglong, QDateTime> >();
qDBusRegisterMetaType<QMap<QDBusSignature, QString> >();
qDBusRegisterMetaType<MyStruct>();
qDBusRegisterMetaType<MyVariantMapStruct>();
qDBusRegisterMetaType<QList<MyVariantMapStruct> >();
qDBusRegisterMetaType<MyFileDescriptorStruct>();
qDBusRegisterMetaType<QList<MyFileDescriptorStruct> >();
}
#ifdef USE_PRIVATE_CODE
#include "private/qdbusintrospection_p.h"
// just to make it easier:
typedef QDBusIntrospection::Interfaces InterfaceMap;
typedef QDBusIntrospection::Objects ObjectMap;
typedef QDBusIntrospection::Arguments ArgumentList;
typedef QDBusIntrospection::Annotations AnnotationsMap;
typedef QDBusIntrospection::Methods MethodMap;
typedef QDBusIntrospection::Signals SignalMap;
typedef QDBusIntrospection::Properties PropertyMap;
Q_DECLARE_METATYPE(QDBusIntrospection::Method)
Q_DECLARE_METATYPE(QDBusIntrospection::Signal)
Q_DECLARE_METATYPE(QDBusIntrospection::Property)
Q_DECLARE_METATYPE(MethodMap)
Q_DECLARE_METATYPE(SignalMap)
Q_DECLARE_METATYPE(PropertyMap)
inline QDBusIntrospection::Argument arg(const char* type, const char *name = 0)
{
QDBusIntrospection::Argument retval;
retval.type = QLatin1String(type);
retval.name = QLatin1String(name);
return retval;
}
template<typename T>
inline QMap<QString, T>& operator<<(QMap<QString, T>& map, const T& m)
{ map.insert(m.name, m); return map; }
template<typename T>
inline QMultiMap<QString, T>& operator<<(QMultiMap<QString, T>& map, const T& m)
{ map.insert(m.name, m); return map; }
inline const char* mapName(const MethodMap&)
{ return "MethodMap"; }
inline const char* mapName(const SignalMap&)
{ return "SignalMap"; }
inline const char* mapName(const PropertyMap&)
{ return "PropertyMap"; }
QString printable(const QDBusIntrospection::Method& m)
{
QString result = "method " + m.name + "(";
foreach (QDBusIntrospection::Argument arg, m.inputArgs)
result += QString("in %1 %2, ")
.arg(arg.type, arg.name);
foreach (QDBusIntrospection::Argument arg, m.outputArgs)
result += QString("out %1 %2, ")
.arg(arg.type, arg.name);
AnnotationsMap::const_iterator it = m.annotations.begin();
for ( ; it != m.annotations.end(); ++it)
result += QString("%1 \"%2\", ").arg(it.key()).arg(it.value());
result += ")";
return result;
}
QString printable(const QDBusIntrospection::Signal& s)
{
QString result = "signal " + s.name + "(";
foreach (QDBusIntrospection::Argument arg, s.outputArgs)
result += QString("out %1 %2, ")
.arg(arg.type, arg.name);
AnnotationsMap::const_iterator it = s.annotations.begin();
for ( ; it != s.annotations.end(); ++it)
result += QString("%1 \"%2\", ").arg(it.key()).arg(it.value());
result += ")";
return result;
}
QString printable(const QDBusIntrospection::Property& p)
{
QString result;
if (p.access == QDBusIntrospection::Property::Read)
result = "property read %1 %2, ";
else if (p.access == QDBusIntrospection::Property::Write)
result = "property write %1 %2, ";
else
result = "property readwrite %1 %2, ";
result = result.arg(p.type, p.name);
AnnotationsMap::const_iterator it = p.annotations.begin();
for ( ; it != p.annotations.end(); ++it)
result += QString("%1 \"%2\", ").arg(it.key()).arg(it.value());
return result;
}
template<typename Map>
char* printableMap(const Map& map)
{
QString contents = "\n";
auto it = map.begin();
for ( ; it != map.end(); ++it) {
if (it.key() != it.value().name)
contents += it.value().name + ":";
contents += printable(it.value());
contents += ";\n";
}
QString result("%1(size = %2): {%3}");
return qstrdup(qPrintable(result
.arg(mapName(map))
.arg(map.size())
.arg(contents)));
}
QT_BEGIN_NAMESPACE
namespace QTest {
template<>
inline char* toString(const MethodMap& map)
{
return printableMap(map);
}
template<>
inline char* toString(const SignalMap& map)
{
return printableMap(map);
}
template<>
inline char* toString(const PropertyMap& map)
{
return printableMap(map);
}
}
QT_END_NAMESPACE
#endif
template<typename T>
bool compare(const T &t1, const T &t2)
{ return t1 == t2; }
template<>
bool compare(const QVariant &v1, const QVariant &v2);
bool compare(double d1, double d2)
{
if (qIsNaN(d1) && qIsNaN(d2))
return true;
return d1 == d2;
}
template<>
bool compare(const QString &s1, const QString &s2)
{
if (s1.isEmpty() && s2.isEmpty())
return true; // regardless of whether one of them is null
return s1 == s2;
}
template<>
bool compare(const QByteArray &ba1, const QByteArray &ba2)
{
if (ba1.isEmpty() && ba2.isEmpty())
return true; // regardless of whether one of them is null
return ba1 == ba2;
}
template<>
bool compare(const QDBusVariant &s1, const QDBusVariant &s2)
{
return compare(s1.variant(), s2.variant());
}
template<typename T>
bool compare(const QList<T> &l1, const QList<T> &l2)
{
if (l1.size() != l2.size())
return false;
typename QList<T>::ConstIterator it1 = l1.constBegin();
typename QList<T>::ConstIterator it2 = l2.constBegin();
typename QList<T>::ConstIterator end = l1.constEnd();
for ( ; it1 != end; ++it1, ++it2)
if (!compare(*it1, *it2))
return false;
return true;
}
template<typename Key, typename T>
bool compare(const QMap<Key, T> &m1, const QMap<Key, T> &m2)
{
if (m1.size() != m2.size())
return false;
typename QMap<Key, T>::ConstIterator i1 = m1.constBegin();
typename QMap<Key, T>::ConstIterator end = m1.constEnd();
for ( ; i1 != end; ++i1) {
typename QMap<Key, T>::ConstIterator i2 = m2.find(i1.key());
if (i2 == m2.constEnd())
return false;
if (!compare(*i1, *i2))
return false;
}
return true;
}
template<typename T>
inline bool compare(const QDBusArgument &arg, const QVariant &v2, T * = 0)
{
return compare(qdbus_cast<T>(arg), qvariant_cast<T>(v2));
}
bool compareToArgument(const QDBusArgument &arg, const QVariant &v2)
{
if (arg.currentSignature() != QDBusMetaType::typeToSignature(v2.metaType()))
return false;
// try to demarshall the arg according to v2
switch (v2.userType())
{
case QMetaType::Bool:
return compare<bool>(arg, v2);
case QMetaType::UChar:
return compare<uchar>(arg, v2);
case QMetaType::Short:
return compare<short>(arg, v2);
case QMetaType::UShort:
return compare<ushort>(arg, v2);
case QMetaType::Int:
return compare<int>(arg, v2);
case QMetaType::UInt:
return compare<uint>(arg, v2);
case QMetaType::LongLong:
return compare<qlonglong>(arg, v2);
case QMetaType::ULongLong:
return compare<qulonglong>(arg, v2);
case QMetaType::Double:
return compare<double>(arg, v2);
case QMetaType::QString:
return compare<QString>(arg, v2);
case QMetaType::QByteArray:
return compare<QByteArray>(arg, v2);
case QMetaType::QVariantList:
return compare<QVariantList>(arg, v2);
case QMetaType::QVariantMap:
return compare<QVariantMap>(arg, v2);
case QMetaType::QPoint:
return compare<QPoint>(arg, v2);
case QMetaType::QPointF:
return compare<QPointF>(arg, v2);
case QMetaType::QSize:
return compare<QSize>(arg, v2);
case QMetaType::QSizeF:
return compare<QSizeF>(arg, v2);
case QMetaType::QLine:
return compare<QLine>(arg, v2);
case QMetaType::QLineF:
return compare<QLineF>(arg, v2);
case QMetaType::QRect:
return compare<QRect>(arg, v2);
case QMetaType::QRectF:
return compare<QRectF>(arg, v2);
case QMetaType::QDate:
return compare<QDate>(arg, v2);
case QMetaType::QTime:
return compare<QTime>(arg, v2);
case QMetaType::QDateTime:
return compare<QDateTime>(arg, v2);
default:
int id = v2.userType();
if (id == qMetaTypeId<QDBusObjectPath>())
return compare<QDBusObjectPath>(arg, v2);
else if (id == qMetaTypeId<QDBusSignature>())
return compare<QDBusSignature>(arg, v2);
else if (id == qMetaTypeId<QDBusVariant>())
return compare<QDBusVariant>(arg, v2);
else if (id == qMetaTypeId<QList<bool> >())
return compare<QList<bool> >(arg, v2);
else if (id == qMetaTypeId<QList<short> >())
return compare<QList<short> >(arg, v2);
else if (id == qMetaTypeId<QList<ushort> >())
return compare<QList<ushort> >(arg, v2);
else if (id == qMetaTypeId<QList<int> >())
return compare<QList<int> >(arg, v2);
else if (id == qMetaTypeId<QList<uint> >())
return compare<QList<uint> >(arg, v2);
else if (id == qMetaTypeId<QList<qlonglong> >())
return compare<QList<qlonglong> >(arg, v2);
else if (id == qMetaTypeId<QList<qulonglong> >())
return compare<QList<qulonglong> >(arg, v2);
else if (id == qMetaTypeId<QList<double> >())
return compare<QList<double> >(arg, v2);
else if (id == qMetaTypeId<QList<QDBusObjectPath> >())
return compare<QList<QDBusObjectPath> >(arg, v2);
else if (id == qMetaTypeId<QList<QDBusSignature> >())
return compare<QList<QDBusSignature> >(arg, v2);
else if (id == qMetaTypeId<QList<QDBusUnixFileDescriptor> >())
return compare<QList<QDBusUnixFileDescriptor> >(arg, v2);
else if (id == qMetaTypeId<QList<QDateTime> >())
return compare<QList<QDateTime> >(arg, v2);
else if (id == qMetaTypeId<QMap<int, QString> >())
return compare<QMap<int, QString> >(arg, v2);
else if (id == qMetaTypeId<QMap<QString, QString> >())
return compare<QMap<QString, QString> >(arg, v2);
else if (id == qMetaTypeId<QMap<QDBusObjectPath, QString> >())
return compare<QMap<QDBusObjectPath, QString> >(arg, v2);
else if (id == qMetaTypeId<QMap<qlonglong, QDateTime> >())
return compare<QMap<qlonglong, QDateTime> >(arg, v2);
else if (id == qMetaTypeId<QMap<QDBusSignature, QString> >())
return compare<QMap<QDBusSignature, QString> >(arg, v2);
else if (id == qMetaTypeId<QList<QByteArray> >())
return compare<QList<QByteArray> >(arg, v2);
else if (id == qMetaTypeId<QList<QList<bool> > >())
return compare<QList<QList<bool> > >(arg, v2);
else if (id == qMetaTypeId<QList<QList<short> > >())
return compare<QList<QList<short> > >(arg, v2);
else if (id == qMetaTypeId<QList<QList<ushort> > >())
return compare<QList<QList<ushort> > >(arg, v2);
else if (id == qMetaTypeId<QList<QList<int> > >())
return compare<QList<QList<int> > >(arg, v2);
else if (id == qMetaTypeId<QList<QList<uint> > >())
return compare<QList<QList<uint> > >(arg, v2);
else if (id == qMetaTypeId<QList<QList<qlonglong> > >())
return compare<QList<QList<qlonglong> > >(arg, v2);
else if (id == qMetaTypeId<QList<QList<qulonglong> > >())
return compare<QList<QList<qulonglong> > >(arg, v2);
else if (id == qMetaTypeId<QList<QList<double> > >())
return compare<QList<QList<double> > >(arg, v2);
else if (id == qMetaTypeId<QList<QStringList> >())
return compare<QList<QStringList> >(arg, v2);
else if (id == qMetaTypeId<QList<QVariantList> >())
return compare<QList<QVariantList> >(arg, v2);
else if (id == qMetaTypeId<MyStruct>())
return compare<MyStruct>(arg, v2);
else if (id == qMetaTypeId<MyVariantMapStruct>())
return compare<MyVariantMapStruct>(arg, v2);
else if (id == qMetaTypeId<QList<MyVariantMapStruct> >())
return compare<QList<MyVariantMapStruct> >(arg, v2);
else if (id == qMetaTypeId<MyFileDescriptorStruct>())
return compare<MyFileDescriptorStruct>(arg, v2);
else if (id == qMetaTypeId<QList<MyFileDescriptorStruct> >())
return compare<QList<MyFileDescriptorStruct> >(arg, v2);
}
qWarning() << "Unexpected QVariant type" << v2.userType()
<< QByteArray(QDBusMetaType::typeToSignature(v2.metaType()))
<< v2.metaType().name();
return false;
}
template<> bool compare(const QVariant &v1, const QVariant &v2)
{
// v1 is the one that came from the network
// v2 is the one that we sent
if (v1.metaType() == QMetaType::fromType<QDBusArgument>())
// this argument has been left un-demarshalled
return compareToArgument(qvariant_cast<QDBusArgument>(v1), v2);
if (v1.userType() != v2.userType())
return false;
int id = v1.userType();
if (id == QMetaType::QVariantList)
return compare(v1.toList(), v2.toList());
else if (id == QMetaType::QVariantMap)
return compare(v1.toMap(), v2.toMap());
else if (id == QMetaType::QString)
return compare(v1.toString(), v2.toString());
else if (id == QMetaType::QByteArray)
return compare(v1.toByteArray(), v2.toByteArray());
else if (id == QMetaType::UChar)
return qvariant_cast<uchar>(v1) == qvariant_cast<uchar>(v2);
else if (id == QMetaType::Short)
return qvariant_cast<short>(v1) == qvariant_cast<short>(v2);
else if (id == QMetaType::UShort)
return qvariant_cast<ushort>(v1) == qvariant_cast<ushort>(v2);
else if (id == qMetaTypeId<QDBusObjectPath>())
return qvariant_cast<QDBusObjectPath>(v1).path() == qvariant_cast<QDBusObjectPath>(v2).path();
else if (id == qMetaTypeId<QDBusSignature>())
return qvariant_cast<QDBusSignature>(v1).signature() == qvariant_cast<QDBusSignature>(v2).signature();
else if (id == qMetaTypeId<QDBusUnixFileDescriptor>())
return compare(qvariant_cast<QDBusUnixFileDescriptor>(v1), qvariant_cast<QDBusUnixFileDescriptor>(v2));
else if (id == qMetaTypeId<QDBusVariant>())
return compare(qvariant_cast<QDBusVariant>(v1).variant(), qvariant_cast<QDBusVariant>(v2).variant());
else if (id == qMetaTypeId<QVariant>())
return compare(qvariant_cast<QVariant>(v1), qvariant_cast<QVariant>(v2));
else if (id == qMetaTypeId<QList<bool> >())
return qvariant_cast<QList<bool> >(v1) == qvariant_cast<QList<bool> >(v2);
else if (id == qMetaTypeId<QList<short> >())
return qvariant_cast<QList<short> >(v1) == qvariant_cast<QList<short> >(v2);
else if (id == qMetaTypeId<QList<ushort> >())
return qvariant_cast<QList<ushort> >(v1) == qvariant_cast<QList<ushort> >(v2);
else if (id == qMetaTypeId<QList<int> >())
return qvariant_cast<QList<int> >(v1) == qvariant_cast<QList<int> >(v2);
else if (id == qMetaTypeId<QList<uint> >())
return qvariant_cast<QList<uint> >(v1) == qvariant_cast<QList<uint> >(v2);
else if (id == qMetaTypeId<QList<qlonglong> >())
return qvariant_cast<QList<qlonglong> >(v1) == qvariant_cast<QList<qlonglong> >(v2);
else if (id == qMetaTypeId<QList<qulonglong> >())
return qvariant_cast<QList<qulonglong> >(v2) == qvariant_cast<QList<qulonglong> >(v2);
else if (id == qMetaTypeId<QList<double> >())
return compare(qvariant_cast<QList<double> >(v1), qvariant_cast<QList<double> >(v2));
else if (id == qMetaTypeId<QVariant>())
return compare(qvariant_cast<QVariant>(v1), qvariant_cast<QVariant>(v2));
else if (id == qMetaTypeId<QList<QList<bool> > >())
return qvariant_cast<QList<QList<bool> > >(v1) == qvariant_cast<QList<QList<bool> > >(v2);
else if (id == qMetaTypeId<QList<QList<short> > >())
return qvariant_cast<QList<QList<short> > >(v1) == qvariant_cast<QList<QList<short> > >(v2);
else if (id == qMetaTypeId<QList<QList<ushort> > >())
return qvariant_cast<QList<QList<ushort> > >(v1) == qvariant_cast<QList<QList<ushort> > >(v2);
else if (id == qMetaTypeId<QList<QList<int> > >())
return qvariant_cast<QList<QList<int> > >(v1) == qvariant_cast<QList<QList<int> > >(v2);
else if (id == qMetaTypeId<QList<QList<uint> > >())
return qvariant_cast<QList<QList<uint> > >(v1) == qvariant_cast<QList<QList<uint> > >(v2);
else if (id == qMetaTypeId<QList<QList<qlonglong> > >())
return qvariant_cast<QList<QList<qlonglong> > >(v1) == qvariant_cast<QList<QList<qlonglong> > >(v2);
else if (id == qMetaTypeId<QList<QList<qulonglong> > >())
return qvariant_cast<QList<QList<qulonglong> > >(v1) == qvariant_cast<QList<QList<qulonglong> > >(v2);
else if (id == qMetaTypeId<QList<QList<double> > >())
return compare(qvariant_cast<QList<QList<double> > >(v1), qvariant_cast<QList<QList<double> > >(v2));
else if (id == qMetaTypeId<QList<QStringList> >())
return qvariant_cast<QList<QStringList> >(v1) == qvariant_cast<QList<QStringList> >(v2);
else if (id == qMetaTypeId<QList<QByteArray> >())
return qvariant_cast<QList<QByteArray> >(v1) == qvariant_cast<QList<QByteArray> >(v2);
else if (id == qMetaTypeId<QList<QVariantList> >())
return compare(qvariant_cast<QList<QVariantList> >(v1), qvariant_cast<QList<QVariantList> >(v2));
else if (id == qMetaTypeId<QMap<int, QString> >())
return compare(qvariant_cast<QMap<int, QString> >(v1), qvariant_cast<QMap<int, QString> >(v2));
else if (id == qMetaTypeId<QMap<QString, QString> >()) // ssmap
return compare(qvariant_cast<QMap<QString, QString> >(v1), qvariant_cast<QMap<QString, QString> >(v2));
else if (id == qMetaTypeId<QMap<QDBusObjectPath, QString> >())
return compare(qvariant_cast<QMap<QDBusObjectPath, QString> >(v1), qvariant_cast<QMap<QDBusObjectPath, QString> >(v2));
else if (id == qMetaTypeId<QMap<qlonglong, QDateTime> >()) // lldtmap
return compare(qvariant_cast<QMap<qint64, QDateTime> >(v1), qvariant_cast<QMap<qint64, QDateTime> >(v2));
else if (id == qMetaTypeId<QMap<QDBusSignature, QString> >())
return compare(qvariant_cast<QMap<QDBusSignature, QString> >(v1), qvariant_cast<QMap<QDBusSignature, QString> >(v2));
else if (id == qMetaTypeId<MyStruct>()) // (is)
return qvariant_cast<MyStruct>(v1) == qvariant_cast<MyStruct>(v2);
else if (id < int(QMetaType::User)) // yes, v1.type()
// QVariant can compare
return v1 == v2;
else {
qWarning() << "Please write a comparison case for type" << v1.typeName();
return false; // unknown type
}
}
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