qmetaobject.cpp

Go to the documentation of this file.

// Copyright (C) 2020 The Qt Company Ltd.
// Copyright (C) 2015 Olivier Goffart <ogoffart@woboq.com>
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
 
#include "qmetaobject.h"
#include "qmetaobject_p.h"
#include "qmetatype.h"
#include "qmetatype_p.h"
#include "qobject.h"
#include "qobject_p.h"
 
#include <qcoreapplication.h>
#include <qvariant.h>
 
// qthread(_p).h uses QT_CONFIG(thread) internally and has a dummy
// interface for the non-thread support case
#include <qthread.h>
#include "private/qthread_p.h"
#if QT_CONFIG(thread)
#include <qsemaphore.h>
#endif
 
// for normalizeTypeInternal
#include "private/qmetaobject_moc_p.h"
 
#include <ctype.h>
#include <memory>
 
QT_BEGIN_NAMESPACE
 
using namespace Qt::StringLiterals;
 
static inline const QMetaObjectPrivate *priv(const uint* data)
{ return reinterpret_cast<const QMetaObjectPrivate*>(data); }
 
static inline const char *rawStringData(const QMetaObject *mo, int index)
{
    Q_ASSERT(priv(mo->d.data)->revision >= 7);
    uint offset = mo->d.stringdata[2*index];
    return reinterpret_cast<const char *>(mo->d.stringdata) + offset;
}
 
static inline QByteArrayView stringDataView(const QMetaObject *mo, int index)
{
    Q_ASSERT(priv(mo->d.data)->revision >= 7);
    uint offset = mo->d.stringdata[2*index];
    uint length = mo->d.stringdata[2*index + 1];
    const char *string = reinterpret_cast<const char *>(mo->d.stringdata) + offset;
    return {string, qsizetype(length)};
}
 
static inline QByteArray stringData(const QMetaObject *mo, int index)
{
    const auto view = stringDataView(mo, index);
    return QByteArray::fromRawData(view.data(), view.size());
}
 
static inline QByteArrayView typeNameFromTypeInfo(const QMetaObject *mo, uint typeInfo)
{
    if (typeInfo & IsUnresolvedType)
        return stringDataView(mo, typeInfo & TypeNameIndexMask);
    else
        return QByteArrayView(QMetaType(typeInfo).name());
}
 
static inline int typeFromTypeInfo(const QMetaObject *mo, uint typeInfo)
{
    if (!(typeInfo & IsUnresolvedType))
        return typeInfo;
    return QMetaType::fromName(rawStringData(mo, typeInfo & TypeNameIndexMask)).id();
}
 
static auto parse_scope(QByteArrayView qualifiedKey) noexcept
{
    struct R {
        std::optional<QByteArrayView> scope;
        QByteArrayView key;
    };
    const auto scopePos = qualifiedKey.lastIndexOf("::"_L1);
    if (scopePos < 0)
        return R{std::nullopt, qualifiedKey};
    else
        return R{qualifiedKey.first(scopePos), qualifiedKey.sliced(scopePos + 2)};
}
 
namespace {
class QMetaMethodPrivate : public QMetaMethodInvoker
{
public:
    static const QMetaMethodPrivate *get(const QMetaMethod *q)
    { return static_cast<const QMetaMethodPrivate *>(q); }
 
    inline QByteArray signature() const;
    inline QByteArray name() const;
    inline int typesDataIndex() const;
    inline const char *rawReturnTypeName() const;
    inline int returnType() const;
    inline int parameterCount() const;
    inline int parametersDataIndex() const;
    inline uint parameterTypeInfo(int index) const;
    inline int parameterType(int index) const;
    inline void getParameterTypes(int *types) const;
    inline const QtPrivate::QMetaTypeInterface *returnMetaTypeInterface() const;
    inline const QtPrivate::QMetaTypeInterface *const *parameterMetaTypeInterfaces() const;
    inline QByteArray parameterTypeName(int index) const;
    inline QList<QByteArray> parameterTypes() const;
    inline QList<QByteArray> parameterNames() const;
    inline QByteArray tag() const;
    inline int ownMethodIndex() const;
    inline int ownConstructorMethodIndex() const;
 
private:
    void checkMethodMetaTypeConsistency(const QtPrivate::QMetaTypeInterface *iface, int index) const;
    QMetaMethodPrivate();
};
} // unnamed namespace
 
enum { MaximumParamCount = 11 }; // up to 10 arguments + 1 return value
 
#if QT_VERSION < QT_VERSION_CHECK(7, 0, 0)
QObject *QMetaObject::newInstance(QGenericArgument val0,
                                  QGenericArgument val1,
                                  QGenericArgument val2,
                                  QGenericArgument val3,
                                  QGenericArgument val4,
                                  QGenericArgument val5,
                                  QGenericArgument val6,
                                  QGenericArgument val7,
                                  QGenericArgument val8,
                                  QGenericArgument val9) const
{
    const char *typeNames[] = {
        nullptr,
        val0.name(), val1.name(), val2.name(), val3.name(), val4.name(),
        val5.name(), val6.name(), val7.name(), val8.name(), val9.name()
    };
    const void *parameters[] = {
        nullptr,
        val0.data(), val1.data(), val2.data(), val3.data(), val4.data(),
        val5.data(), val6.data(), val7.data(), val8.data(), val9.data()
    };
 
    int paramCount;
    for (paramCount = 1; paramCount < MaximumParamCount; ++paramCount) {
        int len = int(qstrlen(typeNames[paramCount]));
        if (len <= 0)
            break;
    }
 
    return newInstanceImpl(this, paramCount, parameters, typeNames, nullptr);
}
#endif
 
QObject *QMetaObject::newInstanceImpl(const QMetaObject *mobj, qsizetype paramCount,
                                      const void **parameters, const char **typeNames,
                                      const QtPrivate::QMetaTypeInterface **metaTypes)
{
    if (!mobj->inherits(&QObject::staticMetaObject)) {
        qWarning("QMetaObject::newInstance: type %s does not inherit QObject", mobj->className());
        return nullptr;
    }
 
QT_WARNING_PUSH
#if Q_CC_GNU >= 1200
QT_WARNING_DISABLE_GCC("-Wdangling-pointer")
#endif
 
    // set the return type
    QObject *returnValue = nullptr;
    QMetaType returnValueMetaType = QMetaType::fromType<decltype(returnValue)>();
    parameters[0] = &returnValue;
    typeNames[0] = returnValueMetaType.name();
    if (metaTypes)
        metaTypes[0] = returnValueMetaType.iface();
 
QT_WARNING_POP
 
    // find the constructor
    auto priv = QMetaObjectPrivate::get(mobj);
    for (int i = 0; i < priv->constructorCount; ++i) {
        QMetaMethod m = QMetaMethod::fromRelativeConstructorIndex(mobj, i);
        if (m.parameterCount() != (paramCount - 1))
            continue;
 
        // attempt to call
        QMetaMethodPrivate::InvokeFailReason r =
                QMetaMethodPrivate::invokeImpl(m, nullptr, Qt::DirectConnection, paramCount,
                                               parameters, typeNames, metaTypes);
        if (r == QMetaMethodPrivate::InvokeFailReason::None)
            return returnValue;
        if (int(r) < 0)
            return nullptr;
    }
 
    return returnValue;
}
 
int QMetaObject::static_metacall(Call cl, int idx, void **argv) const
{
    Q_ASSERT(priv(d.data)->revision >= 6);
    if (!d.static_metacall)
        return 0;
    d.static_metacall(nullptr, cl, idx, argv);
    return -1;
}
 
int QMetaObject::metacall(QObject *object, Call cl, int idx, void **argv)
{
    if (object->d_ptr->metaObject)
        return object->d_ptr->metaObject->metaCall(object, cl, idx, argv);
    else
        return object->qt_metacall(cl, idx, argv);
}
 
static inline QByteArrayView objectClassName(const QMetaObject *m)
{
    return stringDataView(m, priv(m->d.data)->className);
}
 
const char *QMetaObject::className() const
{
    return objectClassName(this).constData();
}
 
bool QMetaObject::inherits(const QMetaObject *metaObject) const noexcept
{
    const QMetaObject *m = this;
    do {
        if (metaObject == m)
            return true;
    } while ((m = m->d.superdata));
    return false;
}
 
const QObject *QMetaObject::cast(const QObject *obj) const
{
    return (obj && obj->metaObject()->inherits(this)) ? obj : nullptr;
}
 
#ifndef QT_NO_TRANSLATION
QString QMetaObject::tr(const char *s, const char *c, int n) const
{
    return QCoreApplication::translate(className(), s, c, n);
}
#endif // QT_NO_TRANSLATION
 
QMetaType QMetaObject::metaType() const
{
 
    const QMetaObjectPrivate *d = priv(this->d.data);
    if (d->revision < 10) {
        // before revision 10, we did not store the metatype in the metatype array
        return QMetaType::fromName(className());
    } else {
        /* in the metatype array, we store
 
         | index                               | data                           |
         |----------------------------------------------------------------------|
         | 0                                   | QMetaType(property0)           |
         | ...                                 | ...                            |
         | propertyCount - 1                   | QMetaType(propertyCount - 1)   |
         | propertyCount                       | QMetaType(enumerator0)         |
         | ...                                 | ...                            |
         | propertyCount + enumeratorCount - 1 | QMetaType(enumeratorCount - 1) |
         | propertyCount + enumeratorCount     | QMetaType(class)               |
 
        */
#if QT_VERSION < QT_VERSION_CHECK(7, 0, 0)
        // Before revision 12 we only stored metatypes for enums if they showed
        // up as types of properties or method arguments or return values.
        // From revision 12 on, we always store them in a predictable place.
        const qsizetype offset = d->revision < 12
                ? d->propertyCount
                : d->propertyCount + d->enumeratorCount;
#else
        const qsizetype offset = d->propertyCount + d->enumeratorCount;
#endif
 
        auto iface = this->d.metaTypes[offset];
        if (iface && QtMetaTypePrivate::isInterfaceFor<void>(iface))
            return QMetaType(); // return invalid meta-type for namespaces
        if (iface)
            return QMetaType(iface);
        else // in case of a dynamic metaobject, we might have no metatype stored
            return QMetaType::fromName(className()); // try lookup by name in that case
    }
}
 
int QMetaObject::methodOffset() const
{
    int offset = 0;
    const QMetaObject *m = d.superdata;
    while (m) {
        offset += priv(m->d.data)->methodCount;
        m = m->d.superdata;
    }
    return offset;
}
 
 
int QMetaObject::enumeratorOffset() const
{
    int offset = 0;
    const QMetaObject *m = d.superdata;
    while (m) {
        offset += priv(m->d.data)->enumeratorCount;
        m = m->d.superdata;
    }
    return offset;
}
 
int QMetaObject::propertyOffset() const
{
    int offset = 0;
    const QMetaObject *m = d.superdata;
    while (m) {
        offset += priv(m->d.data)->propertyCount;
        m = m->d.superdata;
    }
    return offset;
}
 
int QMetaObject::classInfoOffset() const
{
    int offset = 0;
    const QMetaObject *m = d.superdata;
    while (m) {
        offset += priv(m->d.data)->classInfoCount;
        m = m->d.superdata;
    }
    return offset;
}
 
int QMetaObject::constructorCount() const
{
    Q_ASSERT(priv(d.data)->revision >= 2);
    return priv(d.data)->constructorCount;
}
 
int QMetaObject::methodCount() const
{
    int n = priv(d.data)->methodCount;
    const QMetaObject *m = d.superdata;
    while (m) {
        n += priv(m->d.data)->methodCount;
        m = m->d.superdata;
    }
    return n;
}
 
int QMetaObject::enumeratorCount() const
{
    int n = priv(d.data)->enumeratorCount;
    const QMetaObject *m = d.superdata;
    while (m) {
        n += priv(m->d.data)->enumeratorCount;
        m = m->d.superdata;
    }
    return n;
}
 
int QMetaObject::propertyCount() const
{
    int n = priv(d.data)->propertyCount;
    const QMetaObject *m = d.superdata;
    while (m) {
        n += priv(m->d.data)->propertyCount;
        m = m->d.superdata;
    }
    return n;
}
 
int QMetaObject::classInfoCount() const
{
    int n = priv(d.data)->classInfoCount;
    const QMetaObject *m = d.superdata;
    while (m) {
        n += priv(m->d.data)->classInfoCount;
        m = m->d.superdata;
    }
    return n;
}
 
// Returns \c true if the method defined by the given meta-object&meta-method
// matches the given name, argument count and argument types, otherwise
// returns \c false.
bool QMetaObjectPrivate::methodMatch(const QMetaObject *m, const QMetaMethod &method,
                        const QByteArray &name, int argc,
                        const QArgumentType *types)
{
    const QMetaMethod::Data &data = method.data;
    auto priv = QMetaMethodPrivate::get(&method);
    if (priv->parameterCount() != argc)
        return false;
 
    if (stringData(m, data.name()) != name)
        return false;
 
    const QtPrivate::QMetaTypeInterface * const *ifaces = priv->parameterMetaTypeInterfaces();
    int paramsIndex = data.parameters() + 1;
    for (int i = 0; i < argc; ++i) {
        uint typeInfo = m->d.data[paramsIndex + i];
        if (int id = types[i].type()) {
            if (id == QMetaType(ifaces[i]).id())
                continue;
            if (id != typeFromTypeInfo(m, typeInfo))
                return false;
        } else {
            if (types[i].name() == QMetaType(ifaces[i]).name())
                continue;
            if (types[i].name() != typeNameFromTypeInfo(m, typeInfo))
                return false;
        }
    }
 
    return true;
}
 
QMetaMethod QMetaObjectPrivate::firstMethod(const QMetaObject *baseObject, QByteArrayView name)
{
    for (const QMetaObject *currentObject = baseObject; currentObject; currentObject = currentObject->superClass()) {
        const int start = priv(currentObject->d.data)->methodCount - 1;
        const int end = 0;
        for (int i = start; i >= end; --i) {
            auto candidate = QMetaMethod::fromRelativeMethodIndex(currentObject, i);
            if (name == candidate.name())
                return candidate;
        }
    }
    return QMetaMethod{};
}
 
template<int MethodType>
inline int QMetaObjectPrivate::indexOfMethodRelative(const QMetaObject **baseObject,
                                        const QByteArray &name, int argc,
                                        const QArgumentType *types)
{
    for (const QMetaObject *m = *baseObject; m; m = m->d.superdata) {
        Q_ASSERT(priv(m->d.data)->revision >= 7);
        int i = (MethodType == MethodSignal)
                 ? (priv(m->d.data)->signalCount - 1) : (priv(m->d.data)->methodCount - 1);
        const int end = (MethodType == MethodSlot)
                        ? (priv(m->d.data)->signalCount) : 0;
 
        for (; i >= end; --i) {
            auto data = QMetaMethod::fromRelativeMethodIndex(m, i);
            if (methodMatch(m, data, name, argc, types)) {
                *baseObject = m;
                return i;
            }
        }
    }
    return -1;
}
 
 
int QMetaObject::indexOfConstructor(const char *constructor) const
{
    Q_ASSERT(priv(d.data)->revision >= 7);
    QArgumentTypeArray types;
    QByteArray name = QMetaObjectPrivate::decodeMethodSignature(constructor, types);
    return QMetaObjectPrivate::indexOfConstructor(this, name, types.size(), types.constData());
}
 
int QMetaObject::indexOfMethod(const char *method) const
{
    const QMetaObject *m = this;
    int i;
    Q_ASSERT(priv(m->d.data)->revision >= 7);
    QArgumentTypeArray types;
    QByteArray name = QMetaObjectPrivate::decodeMethodSignature(method, types);
    i = QMetaObjectPrivate::indexOfMethodRelative<0>(&m, name, types.size(), types.constData());
    if (i >= 0)
        i += m->methodOffset();
    return i;
}
 
// Parses a string of comma-separated types into QArgumentTypes.
// No normalization of the type names is performed.
static void argumentTypesFromString(const char *str, const char *end,
                                    QArgumentTypeArray &types)
{
    Q_ASSERT(str <= end);
    while (str != end) {
        if (!types.isEmpty())
            ++str; // Skip comma
        const char *begin = str;
        int level = 0;
        while (str != end && (level > 0 || *str != ',')) {
            if (*str == '<')
                ++level;
            else if (*str == '>')
                --level;
            ++str;
        }
        QByteArray argType(begin, str - begin);
        argType.replace("QVector<", "QList<");
        types += QArgumentType(std::move(argType));
    }
}
 
// Given a method \a signature (e.g. "foo(int,double)"), this function
// populates the argument \a types array and returns the method name.
QByteArray QMetaObjectPrivate::decodeMethodSignature(
        const char *signature, QArgumentTypeArray &types)
{
    Q_ASSERT(signature != nullptr);
    const char *lparens = strchr(signature, '(');
    if (!lparens)
        return QByteArray();
    const char *rparens = strrchr(lparens + 1, ')');
    if (!rparens || *(rparens+1))
        return QByteArray();
    int nameLength = lparens - signature;
    argumentTypesFromString(lparens + 1, rparens, types);
    return QByteArray::fromRawData(signature, nameLength);
}
 
int QMetaObject::indexOfSignal(const char *signal) const
{
    const QMetaObject *m = this;
    int i;
    Q_ASSERT(priv(m->d.data)->revision >= 7);
    QArgumentTypeArray types;
    QByteArray name = QMetaObjectPrivate::decodeMethodSignature(signal, types);
    i = QMetaObjectPrivate::indexOfSignalRelative(&m, name, types.size(), types.constData());
    if (i >= 0)
        i += m->methodOffset();
    return i;
}
 
int QMetaObjectPrivate::indexOfSignalRelative(const QMetaObject **baseObject,
                                              const QByteArray &name, int argc,
                                              const QArgumentType *types)
{
    int i = indexOfMethodRelative<MethodSignal>(baseObject, name, argc, types);
#ifndef QT_NO_DEBUG
    const QMetaObject *m = *baseObject;
    if (i >= 0 && m && m->d.superdata) {
        int conflict = indexOfMethod(m->d.superdata, name, argc, types);
        if (conflict >= 0) {
            QMetaMethod conflictMethod = m->d.superdata->method(conflict);
            qWarning("QMetaObject::indexOfSignal: signal %s from %s redefined in %s",
                     conflictMethod.methodSignature().constData(),
                     m->d.superdata->className(), m->className());
        }
     }
 #endif
     return i;
}
 
int QMetaObject::indexOfSlot(const char *slot) const
{
    const QMetaObject *m = this;
    int i;
    Q_ASSERT(priv(m->d.data)->revision >= 7);
    QArgumentTypeArray types;
    QByteArray name = QMetaObjectPrivate::decodeMethodSignature(slot, types);
    i = QMetaObjectPrivate::indexOfSlotRelative(&m, name, types.size(), types.constData());
    if (i >= 0)
        i += m->methodOffset();
    return i;
}
 
// same as indexOfSignalRelative but for slots.
int QMetaObjectPrivate::indexOfSlotRelative(const QMetaObject **m,
                                            const QByteArray &name, int argc,
                                            const QArgumentType *types)
{
    return indexOfMethodRelative<MethodSlot>(m, name, argc, types);
}
 
int QMetaObjectPrivate::indexOfSignal(const QMetaObject *m, const QByteArray &name,
                                      int argc, const QArgumentType *types)
{
    int i = indexOfSignalRelative(&m, name, argc, types);
    if (i >= 0)
        i += m->methodOffset();
    return i;
}
 
int QMetaObjectPrivate::indexOfSlot(const QMetaObject *m, const QByteArray &name,
                                    int argc, const QArgumentType *types)
{
    int i = indexOfSlotRelative(&m, name, argc, types);
    if (i >= 0)
        i += m->methodOffset();
    return i;
}
 
int QMetaObjectPrivate::indexOfMethod(const QMetaObject *m, const QByteArray &name,
                                      int argc, const QArgumentType *types)
{
    int i = indexOfMethodRelative<0>(&m, name, argc, types);
    if (i >= 0)
        i += m->methodOffset();
    return i;
}
 
int QMetaObjectPrivate::indexOfConstructor(const QMetaObject *m, const QByteArray &name,
                                           int argc, const QArgumentType *types)
{
    for (int i = priv(m->d.data)->constructorCount-1; i >= 0; --i) {
        const QMetaMethod method = QMetaMethod::fromRelativeConstructorIndex(m, i);
        if (methodMatch(m, method, name, argc, types))
            return i;
    }
    return -1;
}
 
int QMetaObjectPrivate::absoluteSignalCount(const QMetaObject *m)
{
    Q_ASSERT(m != nullptr);
    int n = priv(m->d.data)->signalCount;
    for (m = m->d.superdata; m; m = m->d.superdata)
        n += priv(m->d.data)->signalCount;
    return n;
}
 
int QMetaObjectPrivate::signalIndex(const QMetaMethod &m)
{
    if (!m.mobj)
        return -1;
    return QMetaMethodPrivate::get(&m)->ownMethodIndex() + signalOffset(m.mobj);
}
 
QMetaMethod QMetaObjectPrivate::signal(const QMetaObject *m, int signal_index)
{
    if (signal_index < 0)
        return QMetaMethod();
 
    Q_ASSERT(m != nullptr);
    int i = signal_index;
    i -= signalOffset(m);
    if (i < 0 && m->d.superdata)
        return signal(m->d.superdata, signal_index);
 
 
    if (i >= 0 && i < priv(m->d.data)->signalCount)
        return QMetaMethod::fromRelativeMethodIndex(m, i);
    return QMetaMethod();
}
 
bool QMetaObjectPrivate::checkConnectArgs(int signalArgc, const QArgumentType *signalTypes,
                                          int methodArgc, const QArgumentType *methodTypes)
{
    if (signalArgc < methodArgc)
        return false;
    for (int i = 0; i < methodArgc; ++i) {
        if (signalTypes[i] != methodTypes[i])
            return false;
    }
    return true;
}
 
bool QMetaObjectPrivate::checkConnectArgs(const QMetaMethodPrivate *signal,
                                          const QMetaMethodPrivate *method)
{
    if (signal->methodType() != QMetaMethod::Signal)
        return false;
    if (signal->parameterCount() < method->parameterCount())
        return false;
    const QMetaObject *smeta = signal->enclosingMetaObject();
    const QMetaObject *rmeta = method->enclosingMetaObject();
    for (int i = 0; i < method->parameterCount(); ++i) {
        uint sourceTypeInfo = signal->parameterTypeInfo(i);
        uint targetTypeInfo = method->parameterTypeInfo(i);
        if ((sourceTypeInfo & IsUnresolvedType)
            || (targetTypeInfo & IsUnresolvedType)) {
            QByteArrayView sourceName = typeNameFromTypeInfo(smeta, sourceTypeInfo);
            QByteArrayView targetName = typeNameFromTypeInfo(rmeta, targetTypeInfo);
            if (sourceName != targetName)
                return false;
        } else {
            int sourceType = typeFromTypeInfo(smeta, sourceTypeInfo);
            int targetType = typeFromTypeInfo(rmeta, targetTypeInfo);
            if (sourceType != targetType)
                return false;
        }
    }
    return true;
}
 
static const QMetaObject *QMetaObject_findMetaObject(const QMetaObject *self, QByteArrayView name)
{
    while (self) {
        if (objectClassName(self) == name)
            return self;
        if (self->d.relatedMetaObjects) {
            Q_ASSERT(priv(self->d.data)->revision >= 2);
            const auto *e = self->d.relatedMetaObjects;
            if (e) {
                while (*e) {
                    if (const QMetaObject *m =QMetaObject_findMetaObject((*e), name))
                        return m;
                    ++e;
                }
            }
        }
        self = self->d.superdata;
    }
    return self;
}
 
int QMetaObject::indexOfEnumerator(const char *name) const
{
    return QMetaObjectPrivate::indexOfEnumerator(this, name);
}
 
int QMetaObjectPrivate::indexOfEnumerator(const QMetaObject *m, QByteArrayView name)
{
    using W = QMetaObjectPrivate::Which;
    for (auto which : { W::Name, W::Alias }) {
        if (int index = indexOfEnumerator(m, name, which); index != -1)
            return index;
    }
    return -1;
}
 
int QMetaObjectPrivate::indexOfEnumerator(const QMetaObject *m, QByteArrayView name, Which which)
{
    while (m) {
        const QMetaObjectPrivate *d = priv(m->d.data);
        for (int i = 0; i < d->enumeratorCount; ++i) {
            const QMetaEnum e(m, i);
            const quint32 id = which == Which::Name ? e.data.name() : e.data.alias();
            QByteArrayView prop = stringDataView(m, id);
            if (name == prop) {
                i += m->enumeratorOffset();
                return i;
            }
        }
        m = m->d.superdata;
    }
    return -1;
}
 
int QMetaObject::indexOfProperty(const char *name) const
{
    const QMetaObject *m = this;
    while (m) {
        const QMetaObjectPrivate *d = priv(m->d.data);
        for (int i = 0; i < d->propertyCount; ++i) {
            const QMetaProperty::Data data = QMetaProperty::getMetaPropertyData(m, i);
            const char *prop = rawStringData(m, data.name());
            if (strcmp(name, prop) == 0) {
                i += m->propertyOffset();
                return i;
            }
        }
        m = m->d.superdata;
    }
 
    if (priv(this->d.data)->flags & DynamicMetaObject) {
        QAbstractDynamicMetaObject *me =
            const_cast<QAbstractDynamicMetaObject *>(static_cast<const QAbstractDynamicMetaObject *>(this));
 
        return me->createProperty(name, nullptr);
    }
 
    return -1;
}
 
int QMetaObject::indexOfClassInfo(const char *name) const
{
    int i = -1;
    const QMetaObject *m = this;
    while (m && i < 0) {
        for (i = priv(m->d.data)->classInfoCount-1; i >= 0; --i)
            if (strcmp(name, rawStringData(m, m->d.data[priv(m->d.data)->classInfoData + 2*i])) == 0) {
                i += m->classInfoOffset();
                break;
            }
        m = m->d.superdata;
    }
    return i;
}
 
QMetaMethod QMetaObject::constructor(int index) const
{
    int i = index;
    if (i >= 0 && i < priv(d.data)->constructorCount)
        return QMetaMethod::fromRelativeConstructorIndex(this, i);
    return QMetaMethod();
}
 
QMetaMethod QMetaObject::method(int index) const
{
    int i = index;
    i -= methodOffset();
    if (i < 0 && d.superdata)
        return d.superdata->method(index);
 
    if (i >= 0 && i < priv(d.data)->methodCount)
        return QMetaMethod::fromRelativeMethodIndex(this, i);
    return QMetaMethod();
}
 
QMetaEnum QMetaObject::enumerator(int index) const
{
    int i = index;
    i -= enumeratorOffset();
    if (i < 0 && d.superdata)
        return d.superdata->enumerator(index);
 
    if (i >= 0 && i < priv(d.data)->enumeratorCount)
        return QMetaEnum(this, i);
    return QMetaEnum();
}
 
QMetaProperty QMetaObject::property(int index) const
{
    int i = index;
    i -= propertyOffset();
    if (i < 0 && d.superdata)
        return d.superdata->property(index);
 
    if (i >= 0 && i < priv(d.data)->propertyCount)
        return QMetaProperty(this, i);
    return QMetaProperty();
}
 
QMetaProperty QMetaObject::userProperty() const
{
    const int propCount = propertyCount();
    for (int i = propCount - 1; i >= 0; --i) {
        const QMetaProperty prop = property(i);
        if (prop.isUser())
            return prop;
    }
    return QMetaProperty();
}
 
QMetaClassInfo QMetaObject::classInfo(int index) const
{
    int i = index;
    i -= classInfoOffset();
    if (i < 0 && d.superdata)
        return d.superdata->classInfo(index);
 
    QMetaClassInfo result;
    if (i >= 0 && i < priv(d.data)->classInfoCount) {
        result.mobj = this;
        result.data = { d.data + priv(d.data)->classInfoData + i * QMetaClassInfo::Data::Size };
    }
    return result;
}
 
bool QMetaObject::checkConnectArgs(const char *signal, const char *method)
{
    const char *s1 = signal;
    const char *s2 = method;
    while (*s1++ != '(') { }                        // scan to first '('
    while (*s2++ != '(') { }
    if (*s2 == ')' || qstrcmp(s1,s2) == 0)        // method has no args or
        return true;                                //   exact match
    const auto s1len = qstrlen(s1);
    const auto s2len = qstrlen(s2);
    if (s2len < s1len && strncmp(s1,s2,s2len-1)==0 && s1[s2len-1]==',')
        return true;                                // method has less args
    return false;
}
 
bool QMetaObject::checkConnectArgs(const QMetaMethod &signal,
                                   const QMetaMethod &method)
{
    return QMetaObjectPrivate::checkConnectArgs(
            QMetaMethodPrivate::get(&signal),
            QMetaMethodPrivate::get(&method));
}
 
static void qRemoveWhitespace(const char *s, char *d)
{
    char last = 0;
    while (*s && is_space(*s))
        s++;
    while (*s) {
        while (*s && !is_space(*s))
            last = *d++ = *s++;
        while (*s && is_space(*s))
            s++;
        if (*s && ((is_ident_char(*s) && is_ident_char(last))
                   || ((*s == ':') && (last == '<')))) {
            last = *d++ = ' ';
        }
    }
    *d = '\0';
}
 
static char *qNormalizeType(char *d, int &templdepth, QByteArray &result)
{
    const char *t = d;
    while (*d && (templdepth
                   || (*d != ',' && *d != ')'))) {
        if (*d == '<')
            ++templdepth;
        if (*d == '>')
            --templdepth;
        ++d;
    }
    // "void" should only be removed if this is part of a signature that has
    // an explicit void argument; e.g., "void foo(void)" --> "void foo()"
    if (strncmp("void)", t, d - t + 1) != 0)
        result += normalizeTypeInternal(t, d);
 
    return d;
}
 
 
QByteArray QMetaObject::normalizedType(const char *type)
{
    return normalizeTypeInternal(type, type + qstrlen(type));
}
 
QByteArray QMetaObject::normalizedSignature(const char *method)
{
    QByteArray result;
    if (!method || !*method)
        return result;
    int len = int(strlen(method));
    QVarLengthArray<char> stackbuf(len + 1);
    char *d = stackbuf.data();
    qRemoveWhitespace(method, d);
 
    result.reserve(len);
 
    int argdepth = 0;
    int templdepth = 0;
    while (*d) {
        if (argdepth == 1) {
            d = qNormalizeType(d, templdepth, result);
            if (!*d) //most likely an invalid signature.
                break;
        }
        if (*d == '(')
            ++argdepth;
        if (*d == ')')
            --argdepth;
        result += *d++;
    }
 
    return result;
}
 
Q_DECL_COLD_FUNCTION static inline bool
printMethodNotFoundWarning(const QMetaObject *meta, QByteArrayView name, qsizetype paramCount,
                           const char *const *names,
                           const QtPrivate::QMetaTypeInterface * const *metaTypes)
{
    // now find the candidates we couldn't use
    QByteArray candidateMessage;
    for (int i = 0; i < meta->methodCount(); ++i) {
        const QMetaMethod method = meta->method(i);
        if (method.name() == name)
            candidateMessage += "    " + method.methodSignature() + '\n';
    }
    if (!candidateMessage.isEmpty()) {
        candidateMessage.prepend("\nCandidates are:\n");
        candidateMessage.chop(1);
    }
 
    QVarLengthArray<char, 512> sig;
    for (qsizetype i = 1; i < paramCount; ++i) {
        if (names[i])
            sig.append(names[i], qstrlen(names[i]));
        else
            sig.append(metaTypes[i]->name, qstrlen(metaTypes[i]->name));
        sig.append(',');
    }
    if (paramCount != 1)
        sig.resize(sig.size() - 1);
 
    qWarning("QMetaObject::invokeMethod: No such method %s::%.*s(%.*s)%.*s",
             meta->className(), int(name.size()), name.constData(),
             int(sig.size()), sig.constData(),
             int(candidateMessage.size()), candidateMessage.constData());
    return false;
}
 
bool QMetaObject::invokeMethod(QObject *obj,
                               const char *member,
                               Qt::ConnectionType type,
                               QGenericReturnArgument ret,
                               QGenericArgument val0,
                               QGenericArgument val1,
                               QGenericArgument val2,
                               QGenericArgument val3,
                               QGenericArgument val4,
                               QGenericArgument val5,
                               QGenericArgument val6,
                               QGenericArgument val7,
                               QGenericArgument val8,
                               QGenericArgument val9)
{
    if (!obj)
        return false;
 
    const char *typeNames[] = {ret.name(), val0.name(), val1.name(), val2.name(), val3.name(),
                               val4.name(), val5.name(), val6.name(), val7.name(), val8.name(),
                               val9.name()};
    const void *parameters[] = {ret.data(), val0.data(), val1.data(), val2.data(), val3.data(),
                                val4.data(), val5.data(), val6.data(), val7.data(), val8.data(),
                                val9.data()};
    int paramCount;
    for (paramCount = 1; paramCount < MaximumParamCount; ++paramCount) {
        if (qstrlen(typeNames[paramCount]) <= 0)
            break;
    }
    return invokeMethodImpl(obj, member, type, paramCount, parameters, typeNames, nullptr);
}
 
bool QMetaObject::invokeMethodImpl(QObject *obj, const char *member, Qt::ConnectionType type,
                                   qsizetype paramCount, const void * const *parameters,
                                   const char * const *typeNames,
                                   const QtPrivate::QMetaTypeInterface * const *metaTypes)
{
    if (!obj)
        return false;
 
    Q_ASSERT(paramCount >= 1);  // includes the return type
    Q_ASSERT(parameters);
    Q_ASSERT(typeNames);
 
    // find the method
    QByteArrayView name(member);
    if (name.isEmpty())
        return false;
 
    const QMetaObject *meta = obj->metaObject();
    for ( ; meta; meta = meta->superClass()) {
        auto priv = QMetaObjectPrivate::get(meta);
        for (int i = 0; i < priv->methodCount; ++i) {
            QMetaMethod m = QMetaMethod::fromRelativeMethodIndex(meta, i);
            if (m.parameterCount() != (paramCount - 1))
                continue;
            if (name != stringDataView(meta, m.data.name()))
                continue;
 
            // attempt to call
            QMetaMethodPrivate::InvokeFailReason r =
                    QMetaMethodPrivate::invokeImpl(m, obj, type, paramCount, parameters,
                                                   typeNames, metaTypes);
            if (int(r) <= 0)
                return r == QMetaMethodPrivate::InvokeFailReason::None;
        }
    }
 
    // This method doesn't belong to us; print out a nice warning with candidates.
    return printMethodNotFoundWarning(obj->metaObject(), name, paramCount, typeNames, metaTypes);
}
 
bool QMetaObject::invokeMethodImpl(QObject *object, QtPrivate::QSlotObjectBase *slotObj, Qt::ConnectionType type,
                                qsizetype parameterCount, const void *const *params, const char *const *names,
                                const QtPrivate::QMetaTypeInterface * const *metaTypes)
{
    // We don't need this now but maybe we want it later, or we may be able to
    // share more code between the two invokeMethodImpl() overloads:
    Q_UNUSED(names);
    auto slot = QtPrivate::SlotObjUniquePtr(slotObj);
 
    if (! object) // ### only if the slot requires the object + not queued?
        return false;
 
    Qt::HANDLE currentThreadId = QThread::currentThreadId();
    QThread *objectThread = object->thread();
    bool receiverInSameThread = false;
    if (objectThread)
        receiverInSameThread = currentThreadId == QThreadData::get2(objectThread)->threadId.loadRelaxed();
 
    if (type == Qt::AutoConnection)
        type = receiverInSameThread ? Qt::DirectConnection : Qt::QueuedConnection;
 
    void **argv = const_cast<void **>(params);
    if (type == Qt::DirectConnection) {
        slot->call(object, argv);
    } else if (type == Qt::QueuedConnection) {
        if (argv[0]) {
            qWarning("QMetaObject::invokeMethod: Unable to invoke methods with return values in "
                     "queued connections");
            return false;
        }
        auto event = std::make_unique<QMetaCallEvent>(std::move(slot), nullptr, -1, parameterCount);
        void **args = event->args();
        QMetaType *types = event->types();
 
        for (int i = 1; i < parameterCount; ++i) {
            types[i] = QMetaType(metaTypes[i]);
            args[i] = types[i].create(argv[i]);
        }
 
        QCoreApplication::postEvent(object, event.release());
    } else if (type == Qt::BlockingQueuedConnection) {
#if QT_CONFIG(thread)
        if (receiverInSameThread)
            qWarning("QMetaObject::invokeMethod: Dead lock detected");
 
        QSemaphore semaphore;
        QCoreApplication::postEvent(object, new QMetaCallEvent(std::move(slot), nullptr, -1, argv, &semaphore));
        semaphore.acquire();
#endif // QT_CONFIG(thread)
    } else {
        qWarning("QMetaObject::invokeMethod: Unknown connection type");
        return false;
    }
    return true;
}
 
QMetaMethod QMetaMethod::fromRelativeMethodIndex(const QMetaObject *mobj, int index)
{
    Q_ASSERT(index >= 0 && index < priv(mobj->d.data)->methodCount);
    QMetaMethod m;
    m.mobj = mobj;
    m.data = { mobj->d.data + priv(mobj->d.data)->methodData + index * Data::Size };
    return m;
}
 
QMetaMethod QMetaMethod::fromRelativeConstructorIndex(const QMetaObject *mobj, int index)
{
    Q_ASSERT(index >= 0 && index < priv(mobj->d.data)->constructorCount);
    QMetaMethod m;
    m.mobj = mobj;
    m.data = { mobj->d.data + priv(mobj->d.data)->constructorData + index * Data::Size };
    return m;
}
 
QByteArray QMetaMethodPrivate::signature() const
{
    Q_ASSERT(priv(mobj->d.data)->revision >= 7);
    QByteArray result;
    result.reserve(256);
    result += name();
    result += '(';
    QList<QByteArray> argTypes = parameterTypes();
    for (int i = 0; i < argTypes.size(); ++i) {
        if (i)
            result += ',';
        result += argTypes.at(i);
    }
    result += ')';
    return result;
}
 
QByteArray QMetaMethodPrivate::name() const
{
    Q_ASSERT(priv(mobj->d.data)->revision >= 7);
    return stringData(mobj, data.name());
}
 
int QMetaMethodPrivate::typesDataIndex() const
{
    Q_ASSERT(priv(mobj->d.data)->revision >= 7);
    return data.parameters();
}
 
const char *QMetaMethodPrivate::rawReturnTypeName() const
{
    Q_ASSERT(priv(mobj->d.data)->revision >= 7);
    uint typeInfo = mobj->d.data[typesDataIndex()];
    if (typeInfo & IsUnresolvedType)
        return rawStringData(mobj, typeInfo & TypeNameIndexMask);
    else
        return QMetaType(typeInfo).name();
}
 
int QMetaMethodPrivate::returnType() const
{
    return parameterType(-1);
}
 
int QMetaMethodPrivate::parameterCount() const
{
    Q_ASSERT(priv(mobj->d.data)->revision >= 7);
    return data.argc();
}
 
inline void
QMetaMethodPrivate::checkMethodMetaTypeConsistency(const QtPrivate::QMetaTypeInterface *iface,
                                                   int index) const
{
    uint typeInfo = parameterTypeInfo(index);
    QMetaType mt(iface);
    if (iface) {
        if ((typeInfo & IsUnresolvedType) == 0)
            Q_ASSERT(mt.id() == int(typeInfo & TypeNameIndexMask));
        Q_ASSERT(mt.name());
    } else {
        // The iface can only be null for a parameter if that parameter is a
        // const-ref to a forward-declared type. Since primitive types are
        // never incomplete, we can assert it's not one of them.
 
#define ASSERT_NOT_PRIMITIVE_TYPE(TYPE, METATYPEID, NAME)           \
        Q_ASSERT(typeInfo != QMetaType::TYPE);
        QT_FOR_EACH_STATIC_PRIMITIVE_NON_VOID_TYPE(ASSERT_NOT_PRIMITIVE_TYPE)
#undef ASSERT_NOT_PRIMITIVE_TYPE
        Q_ASSERT(typeInfo != QMetaType::QObjectStar);
 
        // Prior to Qt 6.4 we failed to record void and void*
        if (priv(mobj->d.data)->revision >= 11) {
            Q_ASSERT(typeInfo != QMetaType::Void);
            Q_ASSERT(typeInfo != QMetaType::VoidStar);
        }
    }
}
 
int QMetaMethodPrivate::parametersDataIndex() const
{
    Q_ASSERT(priv(mobj->d.data)->revision >= 7);
    return typesDataIndex() + 1;
}
 
uint QMetaMethodPrivate::parameterTypeInfo(int index) const
{
    Q_ASSERT(priv(mobj->d.data)->revision >= 7);
    return mobj->d.data[parametersDataIndex() + index];
}
 
const QtPrivate::QMetaTypeInterface *QMetaMethodPrivate::returnMetaTypeInterface() const
{
    Q_ASSERT(priv(mobj->d.data)->revision >= 7);
    if (methodType() == QMetaMethod::Constructor)
        return nullptr;         // constructors don't have return types
 
    const QtPrivate::QMetaTypeInterface *iface =  mobj->d.metaTypes[data.metaTypeOffset()];
    checkMethodMetaTypeConsistency(iface, -1);
    return iface;
}
 
const QtPrivate::QMetaTypeInterface * const *QMetaMethodPrivate::parameterMetaTypeInterfaces() const
{
    Q_ASSERT(priv(mobj->d.data)->revision >= 7);
    int offset = (methodType() == QMetaMethod::Constructor ? 0 : 1);
    const auto ifaces = &mobj->d.metaTypes[data.metaTypeOffset() + offset];
 
    for (int i = 0; i < parameterCount(); ++i)
        checkMethodMetaTypeConsistency(ifaces[i], i);
 
    return ifaces;
}
 
int QMetaMethodPrivate::parameterType(int index) const
{
    Q_ASSERT(priv(mobj->d.data)->revision >= 7);
    return typeFromTypeInfo(mobj, parameterTypeInfo(index));
}
 
void QMetaMethodPrivate::getParameterTypes(int *types) const
{
    Q_ASSERT(priv(mobj->d.data)->revision >= 7);
    int dataIndex = parametersDataIndex();
    int argc = parameterCount();
    for (int i = 0; i < argc; ++i) {
        int id = typeFromTypeInfo(mobj, mobj->d.data[dataIndex++]);
        *(types++) = id;
    }
}
 
QByteArray QMetaMethodPrivate::parameterTypeName(int index) const
{
    int paramsIndex = parametersDataIndex();
    return typeNameFromTypeInfo(mobj, mobj->d.data[paramsIndex + index]).toByteArray();
}
 
QList<QByteArray> QMetaMethodPrivate::parameterTypes() const
{
    Q_ASSERT(priv(mobj->d.data)->revision >= 7);
    int argc = parameterCount();
    QList<QByteArray> list;
    list.reserve(argc);
    int paramsIndex = parametersDataIndex();
    for (int i = 0; i < argc; ++i) {
        QByteArrayView name = typeNameFromTypeInfo(mobj, mobj->d.data[paramsIndex + i]);
        list.emplace_back(name.toByteArray());
    }
    return list;
}
 
QList<QByteArray> QMetaMethodPrivate::parameterNames() const
{
    Q_ASSERT(priv(mobj->d.data)->revision >= 7);
    int argc = parameterCount();
    QList<QByteArray> list;
    list.reserve(argc);
    int namesIndex = parametersDataIndex() + argc;
    for (int i = 0; i < argc; ++i)
        list += stringData(mobj, mobj->d.data[namesIndex + i]);
    return list;
}
 
QByteArray QMetaMethodPrivate::tag() const
{
    Q_ASSERT(priv(mobj->d.data)->revision >= 7);
    return stringData(mobj, data.tag());
}
 
int QMetaMethodPrivate::ownMethodIndex() const
{
    // recompute the methodIndex by reversing the arithmetic in QMetaObject::method()
    return ( data.d - mobj->d.data - priv(mobj->d.data)->methodData)/Data::Size;
}
 
int QMetaMethodPrivate::ownConstructorMethodIndex() const
{
    // recompute the methodIndex by reversing the arithmetic in QMetaObject::constructor()
    Q_ASSERT(methodType() == Constructor);
    return ( data.d - mobj->d.data - priv(mobj->d.data)->constructorData)/Data::Size;
}
 
QByteArray QMetaMethod::methodSignature() const
{
    if (!mobj)
        return QByteArray();
    return QMetaMethodPrivate::get(this)->signature();
}
 
QByteArray QMetaMethod::name() const
{
    if (!mobj)
        return QByteArray();
    return QMetaMethodPrivate::get(this)->name();
}
 
int QMetaMethod::returnType() const
 {
     return returnMetaType().id();
}
 
QMetaType QMetaMethod::returnMetaType() const
{
    if (!mobj || methodType() == QMetaMethod::Constructor)
        return QMetaType{};
    auto mt = QMetaType(mobj->d.metaTypes[data.metaTypeOffset()]);
    if (mt.id() == QMetaType::UnknownType)
        return QMetaType(QMetaMethodPrivate::get(this)->returnType());
    else
        return mt;
}
 
int QMetaMethod::parameterCount() const
{
    if (!mobj)
        return 0;
    return QMetaMethodPrivate::get(this)->parameterCount();
}
 
int QMetaMethod::parameterType(int index) const
{
    return parameterMetaType(index).id();
}
 
QMetaType QMetaMethod::parameterMetaType(int index) const
{
    if (!mobj || index < 0)
        return {};
    auto priv = QMetaMethodPrivate::get(this);
    if (index >= priv->parameterCount())
        return {};
    // + 1 if there exists a return type
    auto parameterOffset = index + (methodType() == QMetaMethod::Constructor ? 0 : 1);
    auto mt = QMetaType(mobj->d.metaTypes[data.metaTypeOffset() + parameterOffset]);
    if (mt.id() == QMetaType::UnknownType)
        return QMetaType(QMetaMethodPrivate::get(this)->parameterType(index));
    else
        return mt;
}
 
void QMetaMethod::getParameterTypes(int *types) const
{
    if (!mobj)
        return;
    QMetaMethodPrivate::get(this)->getParameterTypes(types);
}
 
QList<QByteArray> QMetaMethod::parameterTypes() const
{
    if (!mobj)
        return QList<QByteArray>();
    return QMetaMethodPrivate::get(this)->parameterTypes();
}
 
QByteArray QMetaMethod::parameterTypeName(int index) const
{
    if (!mobj || index < 0 || index >= parameterCount())
        return {};
    return QMetaMethodPrivate::get(this)->parameterTypeName(index);
}
 
QList<QByteArray> QMetaMethod::parameterNames() const
{
    if (!mobj)
        return QList<QByteArray>();
    return QMetaMethodPrivate::get(this)->parameterNames();
}
 
 
const char *QMetaMethod::typeName() const
{
    if (!mobj)
        return nullptr;
    return QMetaMethodPrivate::get(this)->rawReturnTypeName();
}
 
const char *QMetaMethod::tag() const
{
    if (!mobj)
        return nullptr;
    return QMetaMethodPrivate::get(this)->tag().constData();
}
 
 
int QMetaMethod::attributes() const
{
    if (!mobj)
        return false;
    return data.flags() >> 4;
}
 
int QMetaMethod::methodIndex() const
{
    if (!mobj)
        return -1;
    return QMetaMethodPrivate::get(this)->ownMethodIndex() + mobj->methodOffset();
}
 
int QMetaMethod::relativeMethodIndex() const
{
    if (!mobj)
        return -1;
    return QMetaMethodPrivate::get(this)->ownMethodIndex();
}
 
// This method has been around for a while, but the documentation was marked \internal until 5.1
int QMetaMethod::revision() const
{
    if (!mobj)
        return 0;
    if (data.flags() & MethodRevisioned) {
        int offset = priv(mobj->d.data)->methodData
                     + priv(mobj->d.data)->methodCount * Data::Size
                     + QMetaMethodPrivate::get(this)->ownMethodIndex();
        return mobj->d.data[offset];
    }
    return 0;
}
 
bool QMetaMethod::isConst() const
{
    if (!mobj)
        return false;
    if (QMetaObjectPrivate::get(mobj)->revision < 10)
        return false;
    return data.flags() & MethodIsConst;
}
 
QMetaMethod::Access QMetaMethod::access() const
{
    if (!mobj)
        return Private;
    return (QMetaMethod::Access)(data.flags() & AccessMask);
}
 
QMetaMethod::MethodType QMetaMethod::methodType() const
{
    if (!mobj)
        return QMetaMethod::Method;
    return (QMetaMethod::MethodType)((data.flags() & MethodTypeMask)>>2);
}
 
QMetaMethod QMetaMethod::fromSignalImpl(const QMetaObject *metaObject, void **signal)
{
    int i = -1;
    void *args[] = { &i, signal };
    for (const QMetaObject *m = metaObject; m; m = m->d.superdata) {
        m->static_metacall(QMetaObject::IndexOfMethod, 0, args);
        if (i >= 0)
            return QMetaMethod::fromRelativeMethodIndex(m, i);
    }
    return QMetaMethod();
}
 
bool QMetaMethod::invoke(QObject *object,
                         Qt::ConnectionType connectionType,
                         QGenericReturnArgument returnValue,
                         QGenericArgument val0,
                         QGenericArgument val1,
                         QGenericArgument val2,
                         QGenericArgument val3,
                         QGenericArgument val4,
                         QGenericArgument val5,
                         QGenericArgument val6,
                         QGenericArgument val7,
                         QGenericArgument val8,
                         QGenericArgument val9) const
{
    if (!object || !mobj)
        return false;
 
    // check argument count (we don't allow invoking a method if given too few arguments)
    const char *typeNames[] = {
        returnValue.name(),
        val0.name(),
        val1.name(),
        val2.name(),
        val3.name(),
        val4.name(),
        val5.name(),
        val6.name(),
        val7.name(),
        val8.name(),
        val9.name()
    };
    void *param[] = {
        returnValue.data(),
        val0.data(),
        val1.data(),
        val2.data(),
        val3.data(),
        val4.data(),
        val5.data(),
        val6.data(),
        val7.data(),
        val8.data(),
        val9.data()
    };
 
    int paramCount;
    for (paramCount = 1; paramCount < MaximumParamCount; ++paramCount) {
        if (qstrlen(typeNames[paramCount]) <= 0)
            break;
    }
    return invokeImpl(*this, object, connectionType, paramCount, param, typeNames, nullptr);
}
 
bool QMetaMethod::invokeImpl(QMetaMethod self, void *target, Qt::ConnectionType connectionType,
                             qsizetype paramCount, const void *const *parameters,
                             const char *const *typeNames,
                             const QtPrivate::QMetaTypeInterface *const *metaTypes)
{
    if (!target || !self.mobj)
        return false;
    QMetaMethodPrivate::InvokeFailReason r =
            QMetaMethodPrivate::invokeImpl(self, target, connectionType, paramCount, parameters,
                                           typeNames, metaTypes);
    if (Q_LIKELY(r == QMetaMethodPrivate::InvokeFailReason::None))
        return true;
 
    if (int(r) >= int(QMetaMethodPrivate::InvokeFailReason::FormalParameterMismatch)) {
        int n = int(r) - int(QMetaMethodPrivate::InvokeFailReason::FormalParameterMismatch);
        qWarning("QMetaMethod::invoke: cannot convert formal parameter %d from %s in call to %s::%s",
                 n, typeNames[n + 1] ? typeNames[n + 1] : metaTypes[n + 1]->name,
                 self.mobj->className(), self.methodSignature().constData());
    }
    if (r == QMetaMethodPrivate::InvokeFailReason::TooFewArguments) {
        qWarning("QMetaMethod::invoke: too few arguments (%d) in call to %s::%s",
                 int(paramCount), self.mobj->className(), self.methodSignature().constData());
    }
    return false;
}
 
auto QMetaMethodInvoker::invokeImpl(QMetaMethod self, void *target,
                                    Qt::ConnectionType connectionType,
                                    qsizetype paramCount, const void *const *parameters,
                                    const char *const *typeNames,
                                    const QtPrivate::QMetaTypeInterface *const *metaTypes) -> InvokeFailReason
{
    auto object = static_cast<QObject *>(target);
    auto priv = QMetaMethodPrivate::get(&self);
    constexpr bool MetaTypesAreOptional = QT_VERSION < QT_VERSION_CHECK(7, 0, 0);
    auto methodMetaTypes = priv->parameterMetaTypeInterfaces();
    auto param = const_cast<void **>(parameters);
 
    Q_ASSERT(priv->mobj);
    Q_ASSERT(self.methodType() == Constructor || object);
    Q_ASSERT(self.methodType() == Constructor || connectionType == Qt::ConnectionType(-1) ||
             priv->mobj->cast(object));
    Q_ASSERT(paramCount >= 1);  // includes the return type
    Q_ASSERT(parameters);
    Q_ASSERT(typeNames);
    Q_ASSERT(MetaTypesAreOptional || metaTypes);
 
    if ((paramCount - 1) < qsizetype(priv->data.argc()))
        return InvokeFailReason::TooFewArguments;
 
    // 0 is the return type, 1 is the first formal parameter
    auto checkTypesAreCompatible = [=](int idx) {
        uint typeInfo = priv->parameterTypeInfo(idx - 1);
        QByteArrayView userTypeName(typeNames[idx] ? typeNames[idx] : metaTypes[idx]->name);
 
        if ((typeInfo & IsUnresolvedType) == 0) {
            // this is a built-in type
            if (MetaTypesAreOptional && !metaTypes)
                return int(typeInfo) == QMetaType::fromName(userTypeName).id();
            return int(typeInfo) == metaTypes[idx]->typeId;
        }
 
        QByteArrayView methodTypeName = stringDataView(priv->mobj, typeInfo & TypeNameIndexMask);
        if ((MetaTypesAreOptional && !metaTypes) || !metaTypes[idx]) {
            // compatibility call, compare strings
            if (methodTypeName == userTypeName)
                return true;
 
            // maybe the user type needs normalization
            QByteArray normalized = normalizeTypeInternal(userTypeName.begin(), userTypeName.end());
            return methodTypeName == normalized;
        }
 
        QMetaType userType(metaTypes[idx]);
        Q_ASSERT(userType.isValid());
        if (QMetaType(methodMetaTypes[idx - 1]) == userType)
            return true;
 
        // if the parameter type was NOT only forward-declared, it MUST have
        // matched
        if (methodMetaTypes[idx - 1])
            return false;
 
        // resolve from the name moc stored for us
        QMetaType resolved = QMetaType::fromName(methodTypeName);
        return resolved == userType;
    };
 
    // force all types to be registered, just in case
    for (qsizetype i = 0; metaTypes && i < paramCount; ++i)
        QMetaType(metaTypes[i]).registerType();
 
    // check formal parameters first (overload set)
    for (qsizetype i = 1; i < paramCount; ++i) {
        if (!checkTypesAreCompatible(i))
            return InvokeFailReason(int(InvokeFailReason::FormalParameterMismatch) + i - 1);
    }
 
    // handle constructors first
    if (self.methodType() == Constructor) {
        if (object) {
            qWarning("QMetaMethod::invokeMethod: cannot call constructor %s on object %p",
                     self.methodSignature().constData(), object);
            return InvokeFailReason::ConstructorCallOnObject;
        }
 
        if (!parameters[0]) {
            qWarning("QMetaMethod::invokeMethod: constructor call to %s must assign a return type",
                     self.methodSignature().constData());
            return InvokeFailReason::ConstructorCallWithoutResult;
        }
 
        if (!MetaTypesAreOptional || metaTypes) {
            if (metaTypes[0]->typeId != QMetaType::QObjectStar) {
                qWarning("QMetaMethod::invokeMethod: cannot convert QObject* to %s on constructor call %s",
                         metaTypes[0]->name, self.methodSignature().constData());
                return InvokeFailReason::ReturnTypeMismatch;
            }
        }
 
        int idx = priv->ownConstructorMethodIndex();
        if (priv->mobj->static_metacall(QMetaObject::CreateInstance, idx, param) >= 0)
            return InvokeFailReason::ConstructorCallFailed;
        return {};
    }
 
    // regular type - check return type
    if (parameters[0]) {
        if (!checkTypesAreCompatible(0)) {
            const char *retType = typeNames[0] ? typeNames[0] : metaTypes[0]->name;
            qWarning("QMetaMethod::invokeMethod: return type mismatch for method %s::%s:"
                     " cannot convert from %s to %s during invocation",
                     priv->mobj->className(), priv->methodSignature().constData(),
                     priv->rawReturnTypeName(), retType);
            return InvokeFailReason::ReturnTypeMismatch;
        }
    }
 
    Qt::HANDLE currentThreadId = nullptr;
    QThread *objectThread = nullptr;
    auto receiverInSameThread = [&]() {
        if (!currentThreadId) {
            currentThreadId = QThread::currentThreadId();
            objectThread = object->thread();
        }
        if (objectThread)
            return currentThreadId == QThreadData::get2(objectThread)->threadId.loadRelaxed();
        return false;
    };
 
    // check connection type
    if (connectionType == Qt::AutoConnection)
        connectionType = receiverInSameThread() ? Qt::DirectConnection : Qt::QueuedConnection;
    else if (connectionType == Qt::ConnectionType(-1))
        connectionType = Qt::DirectConnection;
 
#if !QT_CONFIG(thread)
    if (connectionType == Qt::BlockingQueuedConnection) {
        connectionType = Qt::DirectConnection;
    }
#endif
 
    // invoke!
    int idx_relative = priv->ownMethodIndex();
    int idx_offset = priv->mobj->methodOffset();
    QObjectPrivate::StaticMetaCallFunction callFunction = priv->mobj->d.static_metacall;
 
    if (connectionType == Qt::DirectConnection) {
        if (callFunction)
            callFunction(object, QMetaObject::InvokeMetaMethod, idx_relative, param);
        else if (QMetaObject::metacall(object, QMetaObject::InvokeMetaMethod, idx_relative + idx_offset, param) >= 0)
            return InvokeFailReason::CallViaVirtualFailed;
    } else if (connectionType == Qt::QueuedConnection) {
        if (parameters[0]) {
            qWarning("QMetaMethod::invoke: Unable to invoke methods with return values in "
                     "queued connections");
            return InvokeFailReason::CouldNotQueueParameter;
        }
 
        auto event = std::make_unique<QMetaCallEvent>(idx_offset, idx_relative, callFunction, nullptr, -1, paramCount);
        QMetaType *types = event->types();
        void **args = event->args();
 
        // fill in the meta types first
        for (int i = 1; i < paramCount; ++i) {
            types[i] = QMetaType(methodMetaTypes[i - 1]);
            if (!types[i].iface() && (!MetaTypesAreOptional || metaTypes))
                types[i] = QMetaType(metaTypes[i]);
            if (!types[i].iface())
                types[i] = priv->parameterMetaType(i - 1);
            if (!types[i].iface() && typeNames[i])
                types[i] = QMetaType::fromName(typeNames[i]);
            if (!types[i].iface()) {
                qWarning("QMetaMethod::invoke: Unable to handle unregistered datatype '%s'",
                         typeNames[i]);
                return InvokeFailReason(int(InvokeFailReason::CouldNotQueueParameter) - i);
            }
        }
 
        // now create copies of our parameters using those meta types
        for (int i = 1; i < paramCount; ++i)
            args[i] = types[i].create(parameters[i]);
 
        QCoreApplication::postEvent(object, event.release());
    } else { // blocking queued connection
#if QT_CONFIG(thread)
        if (receiverInSameThread()) {
            qWarning("QMetaMethod::invoke: Dead lock detected in BlockingQueuedConnection: "
                     "Receiver is %s(%p)", priv->mobj->className(), object);
            return InvokeFailReason::DeadLockDetected;
        }
 
        QSemaphore semaphore;
        QCoreApplication::postEvent(object, new QMetaCallEvent(idx_offset, idx_relative, callFunction,
                                                        nullptr, -1, param, &semaphore));
        semaphore.acquire();
#endif // QT_CONFIG(thread)
    }
    return {};
}
 
bool QMetaMethod::invokeOnGadget(void *gadget,
                                 QGenericReturnArgument returnValue,
                                 QGenericArgument val0,
                                 QGenericArgument val1,
                                 QGenericArgument val2,
                                 QGenericArgument val3,
                                 QGenericArgument val4,
                                 QGenericArgument val5,
                                 QGenericArgument val6,
                                 QGenericArgument val7,
                                 QGenericArgument val8,
                                 QGenericArgument val9) const
{
   if (!gadget || !mobj)
        return false;
 
    // check return type
    if (returnValue.data()) {
        const char *retType = typeName();
        if (qstrcmp(returnValue.name(), retType) != 0) {
            // normalize the return value as well
            QByteArray normalized = QMetaObject::normalizedType(returnValue.name());
            if (qstrcmp(normalized.constData(), retType) != 0) {
                // String comparison failed, try compare the metatype.
                int t = returnType();
                if (t == QMetaType::UnknownType || t != QMetaType::fromName(normalized).id())
                    return false;
            }
        }
    }
 
    // check argument count (we don't allow invoking a method if given too few arguments)
    const char *typeNames[] = {
        returnValue.name(),
        val0.name(),
        val1.name(),
        val2.name(),
        val3.name(),
        val4.name(),
        val5.name(),
        val6.name(),
        val7.name(),
        val8.name(),
        val9.name()
    };
    int paramCount;
    for (paramCount = 1; paramCount < MaximumParamCount; ++paramCount) {
        if (qstrlen(typeNames[paramCount]) <= 0)
            break;
    }
    if (paramCount <= QMetaMethodPrivate::get(this)->parameterCount())
        return false;
 
    // invoke!
    void *param[] = {
        returnValue.data(),
        val0.data(),
        val1.data(),
        val2.data(),
        val3.data(),
        val4.data(),
        val5.data(),
        val6.data(),
        val7.data(),
        val8.data(),
        val9.data()
    };
    int idx_relative = QMetaMethodPrivate::get(this)->ownMethodIndex();
    Q_ASSERT(QMetaObjectPrivate::get(mobj)->revision >= 6);
    QObjectPrivate::StaticMetaCallFunction callFunction = mobj->d.static_metacall;
    if (!callFunction)
        return false;
    callFunction(reinterpret_cast<QObject*>(gadget), QMetaObject::InvokeMetaMethod, idx_relative, param);
    return true;
}
 
const char *QMetaEnum::name() const
{
    if (!mobj)
        return nullptr;
    return rawStringData(mobj, data.name());
}
 
const char *QMetaEnum::enumName() const
{
    if (!mobj)
        return nullptr;
    return rawStringData(mobj, data.alias());
}
 
QMetaType QMetaEnum::metaType() const
{
    if (!mobj)
        return {};
 
    const QMetaObjectPrivate *p = priv(mobj->d.data);
#if QT_VERSION < QT_VERSION_CHECK(7, 0, 0)
    if (p->revision < 12)
        QMetaType();
#endif
 
    return QMetaType(mobj->d.metaTypes[data.index(mobj) + p->propertyCount]);
}
 
int QMetaEnum::keyCount() const
{
    if (!mobj)
        return 0;
    return data.keyCount();
}
 
const char *QMetaEnum::key(int index) const
{
    if (!mobj)
        return nullptr;
    if (index >= 0  && index < int(data.keyCount()))
        return rawStringData(mobj, mobj->d.data[data.data() + 2*index]);
    return nullptr;
}
 
int QMetaEnum::value(int index) const
{
    if (!mobj)
        return 0;
    if (index >= 0 && index < int(data.keyCount()))
        return mobj->d.data[data.data() + 2 * index + 1];
    return -1;
}
 
bool QMetaEnum::isFlag() const
{
    if (!mobj)
        return false;
    return data.flags() & EnumIsFlag;
}
 
bool QMetaEnum::isScoped() const
{
    if (!mobj)
        return false;
    return data.flags() & EnumIsScoped;
}
 
const char *QMetaEnum::scope() const
{
    return mobj ? mobj->className() : nullptr;
}
 
static bool isScopeMatch(QByteArrayView scope, const QMetaEnum *e)
{
    const QByteArrayView className = e->enclosingMetaObject()->className();
 
    // Typical use-cases:
    // a) Unscoped: namespace N { class C { enum E { F }; }; };  key == "N::C::F"
    // b) Scoped: namespace N { class C { enum class E { F }; }; }; key == "N::C::E::F"
    if (scope == className)
        return true;
 
    // Not using name() because if isFlag() is true, we want the actual name
    // of the enum, e.g. "MyFlag", not "MyFlags", e.g.
    // enum MyFlag { F1, F2 }; Q_DECLARE_FLAGS(MyFlags, MyFlag);
    QByteArrayView name = e->enumName();
 
    // Match fully qualified enumerator in unscoped enums, key == "N::C::E::F"
    // equivalent to use-case "a" above
    const auto sz = className.size();
    if (scope.size() == sz + qsizetype(qstrlen("::")) + name.size()
        && scope.startsWith(className)
        && scope.sliced(sz, 2) == "::"
        && scope.sliced(sz + 2) == name)
        return true;
 
    return false;
}
 
int QMetaEnum::keyToValue(const char *key, bool *ok) const
{
    if (ok != nullptr)
        *ok = false;
    if (!mobj || !key)
        return -1;
 
    const auto [scope, enumKey] = parse_scope(QLatin1StringView(key));
    for (int i = 0; i < int(data.keyCount()); ++i) {
        if ((!scope || isScopeMatch(*scope, this))
            && enumKey == stringDataView(mobj, mobj->d.data[data.data() + 2 * i])) {
            if (ok != nullptr)
                *ok = true;
            return mobj->d.data[data.data() + 2 * i + 1];
        }
    }
    return -1;
}
 
const char *QMetaEnum::valueToKey(int value) const
{
    if (!mobj)
        return nullptr;
    for (int i = 0; i < int(data.keyCount()); ++i)
        if (value == (int)mobj->d.data[data.data() + 2 * i + 1])
            return rawStringData(mobj, mobj->d.data[data.data() + 2 * i]);
    return nullptr;
}
 
static bool parseEnumFlags(QByteArrayView v, QVarLengthArray<QByteArrayView, 10> &list)
{
    v = v.trimmed();
    if (v.empty()) {
        qWarning("QMetaEnum::keysToValue: empty keys string.");
        return false;
    }
 
    qsizetype sep = v.indexOf('|', 0);
    if (sep == 0) {
        qWarning("QMetaEnum::keysToValue: malformed keys string, starts with '|', \"%s\"",
                 v.constData());
        return false;
    }
 
    if (sep == -1) { // One flag
        list.push_back(v);
        return true;
    }
 
    if (v.endsWith('|')) {
        qWarning("QMetaEnum::keysToValue: malformed keys string, ends with '|', \"%s\"",
                 v.constData());
        return false;
    }
 
    const auto begin = v.begin();
    const auto end = v.end();
    auto b = begin;
    for (; b != end && sep != -1; sep = v.indexOf('|', sep)) {
        list.push_back({b, begin + sep});
        ++sep; // Skip over '|'
        b = begin + sep;
        if (*b == '|') {
            qWarning("QMetaEnum::keysToValue: malformed keys string, has two consecutive '|': "
                     "\"%s\"", v.constData());
            return false;
        }
    }
 
    // The rest of the string
    list.push_back({b, end});
    return true;
}
 
int QMetaEnum::keysToValue(const char *keys, bool *ok) const
{
    if (ok != nullptr)
        *ok = false;
    if (!mobj || !keys)
        return -1;
 
    auto lookup = [&] (QByteArrayView key) -> std::optional<int> {
        for (int i = data.keyCount() - 1; i >= 0; --i) {
            if (key == stringDataView(mobj, mobj->d.data[data.data() + 2*i]))
                return mobj->d.data[data.data() + 2*i + 1];
        }
        return std::nullopt;
    };
 
    int value = 0;
    QVarLengthArray<QByteArrayView, 10> list;
    const bool r = parseEnumFlags(QByteArrayView{keys}, list);
    if (!r)
        return -1;
    for (const auto &untrimmed : list) {
        const auto parsed = parse_scope(untrimmed.trimmed());
        if (parsed.scope && !isScopeMatch(*parsed.scope, this))
            return -1; // wrong type name in qualified name
        if (auto thisValue = lookup(parsed.key))
            value |= *thisValue;
        else
            return -1; // no such enumerator
    }
    if (ok != nullptr)
        *ok = true;
    return value;
}
 
namespace
{
template <typename String, typename Container, typename Separator>
void join_reversed(String &s, const Container &c, Separator sep)
{
    if (c.empty())
        return;
    qsizetype len = qsizetype(c.size()) - 1; // N - 1 separators
    for (auto &e : c)
        len += qsizetype(e.size()); // N parts
    s.reserve(len);
    bool first = true;
    for (auto rit = c.rbegin(), rend = c.rend(); rit != rend; ++rit) {
        const auto &e = *rit;
        if (!first)
            s.append(sep);
        first = false;
        s.append(e.data(), e.size());
    }
}
} // unnamed namespace
 
QByteArray QMetaEnum::valueToKeys(int value) const
{
    QByteArray keys;
    if (!mobj)
        return keys;
    QVarLengthArray<QByteArrayView, sizeof(int) * CHAR_BIT> parts;
    int v = value;
    // reverse iterate to ensure values like Qt::Dialog=0x2|Qt::Window are processed first.
    for (int i = data.keyCount() - 1; i >= 0; --i) {
        int k = mobj->d.data[data.data() + 2 * i + 1];
        if ((k != 0 && (v & k) == k) || (k == value)) {
            v = v & ~k;
            parts.push_back(stringDataView(mobj, mobj->d.data[data.data() + 2 * i]));
        }
    }
    join_reversed(keys, parts, '|');
    return keys;
}
 
QMetaEnum::QMetaEnum(const QMetaObject *mobj, int index)
    : mobj(mobj), data({ mobj->d.data + priv(mobj->d.data)->enumeratorData + index * Data::Size })
{
    Q_ASSERT(index >= 0 && index < priv(mobj->d.data)->enumeratorCount);
}
 
int QMetaEnum::Data::index(const QMetaObject *mobj) const
{
    return (d - mobj->d.data - priv(mobj->d.data)->enumeratorData) / Size;
}
 
const char *QMetaProperty::name() const
{
    if (!mobj)
        return nullptr;
    return rawStringData(mobj, data.name());
}
 
const char *QMetaProperty::typeName() const
{
    if (!mobj)
        return nullptr;
    // TODO: can the metatype be invalid for dynamic metaobjects?
    if (const auto mt = metaType(); mt.isValid())
        return mt.name();
    return typeNameFromTypeInfo(mobj, data.type()).constData();
}
 
QMetaType QMetaProperty::metaType() const
{
    if (!mobj)
        return {};
    return QMetaType(mobj->d.metaTypes[data.index(mobj)]);
}
 
int QMetaProperty::Data::index(const QMetaObject *mobj) const
{
    return (d - mobj->d.data - priv(mobj->d.data)->propertyData) / Size;
}
 
int QMetaProperty::propertyIndex() const
{
    if (!mobj)
        return -1;
    return data.index(mobj) + mobj->propertyOffset();
}
 
int QMetaProperty::relativePropertyIndex() const
{
    if (!mobj)
        return -1;
    return data.index(mobj);
}
 
bool QMetaProperty::isFlagType() const
{
    return isEnumType() && menum.isFlag();
}
 
bool QMetaProperty::isEnumType() const
{
    if (!mobj)
        return false;
    return (data.flags() & EnumOrFlag) && menum.name();
}
 
bool QMetaProperty::hasStdCppSet() const
{
    if (!mobj)
        return false;
    return (data.flags() & StdCppSet);
}
 
bool QMetaProperty::isAlias() const
{
    if (!mobj)
        return false;
    return (data.flags() & Alias);
}
 
#if QT_DEPRECATED_SINCE(6, 4)
int QMetaProperty::registerPropertyType() const
{
    return typeId();
}
#endif
 
QMetaProperty::QMetaProperty(const QMetaObject *mobj, int index)
    : mobj(mobj),
      data(getMetaPropertyData(mobj, index))
{
    Q_ASSERT(index >= 0 && index < priv(mobj->d.data)->propertyCount);
    // The code below here just resolves menum if the property is an enum type:
    if (!(data.flags() & EnumOrFlag) || !metaType().flags().testFlag(QMetaType::IsEnumeration))
        return;
    QByteArrayView enum_name = typeNameFromTypeInfo(mobj, data.type());
    menum = mobj->enumerator(QMetaObjectPrivate::indexOfEnumerator(mobj, enum_name));
    if (menum.isValid())
        return;
 
    QByteArrayView scope_name;
    const auto parsed = parse_scope(enum_name);
    if (parsed.scope) {
        scope_name = *parsed.scope;
        enum_name = parsed.key;
    } else {
        scope_name = objectClassName(mobj);
    }
 
    const QMetaObject *scope = nullptr;
    if (scope_name == "Qt")
        scope = &Qt::staticMetaObject;
    else
        scope = QMetaObject_findMetaObject(mobj, QByteArrayView(scope_name));
 
    if (scope)
        menum = scope->enumerator(QMetaObjectPrivate::indexOfEnumerator(scope, enum_name));
}
 
QMetaProperty::Data QMetaProperty::getMetaPropertyData(const QMetaObject *mobj, int index)
{
    return { mobj->d.data + priv(mobj->d.data)->propertyData + index * Data::Size };
}
 
QMetaEnum QMetaProperty::enumerator() const
{
    return menum;
}
 
QVariant QMetaProperty::read(const QObject *object) const
{
    if (!object || !mobj)
        return QVariant();
 
    // the status variable is changed by qt_metacall to indicate what it did
    // this feature is currently only used by Qt D-Bus and should not be depended
    // upon. Don't change it without looking into QDBusAbstractInterface first
    // -1 (unchanged): normal qt_metacall, result stored in argv[0]
    // changed: result stored directly in value
    int status = -1;
    QVariant value;
    void *argv[] = { nullptr, &value, &status };
    QMetaType t(mobj->d.metaTypes[data.index(mobj)]);
    if (t == QMetaType::fromType<QVariant>()) {
        argv[0] = &value;
    } else {
        value = QVariant(t, nullptr);
        argv[0] = value.data();
    }
    if (priv(mobj->d.data)->flags & PropertyAccessInStaticMetaCall && mobj->d.static_metacall) {
        mobj->d.static_metacall(const_cast<QObject*>(object), QMetaObject::ReadProperty, data.index(mobj), argv);
    } else {
        QMetaObject::metacall(const_cast<QObject*>(object), QMetaObject::ReadProperty,
                              data.index(mobj) + mobj->propertyOffset(), argv);
    }
 
    if (status != -1)
        return value;
    if (t != QMetaType::fromType<QVariant>() && argv[0] != value.data())
        // pointer or reference
        return QVariant(t, argv[0]);
    return value;
}
 
bool QMetaProperty::write(QObject *object, const QVariant &value) const
{
    if (!object || !isWritable())
        return false;
    return write(object, QVariant(value));
}
 
bool QMetaProperty::write(QObject *object, QVariant &&v) const
{
    if (!object || !isWritable())
        return false;
    QMetaType t(mobj->d.metaTypes[data.index(mobj)]);
    if (t != QMetaType::fromType<QVariant>() && t != v.metaType()) {
        if (isEnumType() && !t.metaObject() && v.metaType().id() == QMetaType::QString) {
            // Assigning a string to a property of type Q_ENUMS (instead of Q_ENUM)
            bool ok;
            if (isFlagType())
                v = QVariant(menum.keysToValue(v.toByteArray(), &ok));
            else
                v = QVariant(menum.keyToValue(v.toByteArray(), &ok));
            if (!ok)
                return false;
        } else if (!v.isValid()) {
            if (isResettable())
                return reset(object);
            v = QVariant(t, nullptr);
        } else if (!v.convert(t)) {
            return false;
        }
    }
    // the status variable is changed by qt_metacall to indicate what it did
    // this feature is currently only used by Qt D-Bus and should not be depended
    // upon. Don't change it without looking into QDBusAbstractInterface first
    // -1 (unchanged): normal qt_metacall, result stored in argv[0]
    // changed: result stored directly in value, return the value of status
    int status = -1;
    // the flags variable is used by the declarative module to implement
    // interception of property writes.
    int flags = 0;
    void *argv[] = { nullptr, &v, &status, &flags };
    if (t == QMetaType::fromType<QVariant>())
        argv[0] = &v;
    else
        argv[0] = v.data();
    if (priv(mobj->d.data)->flags & PropertyAccessInStaticMetaCall && mobj->d.static_metacall)
        mobj->d.static_metacall(object, QMetaObject::WriteProperty, data.index(mobj), argv);
    else
        QMetaObject::metacall(object, QMetaObject::WriteProperty, data.index(mobj) + mobj->propertyOffset(), argv);
 
    return status;
}
 
bool QMetaProperty::reset(QObject *object) const
{
    if (!object || !mobj || !isResettable())
        return false;
    void *argv[] = { nullptr };
    if (priv(mobj->d.data)->flags & PropertyAccessInStaticMetaCall && mobj->d.static_metacall)
        mobj->d.static_metacall(object, QMetaObject::ResetProperty, data.index(mobj), argv);
    else
        QMetaObject::metacall(object, QMetaObject::ResetProperty, data.index(mobj) + mobj->propertyOffset(), argv);
    return true;
}
 
QUntypedBindable QMetaProperty::bindable(QObject *object) const
{
    QUntypedBindable bindable;
    void * argv[1] { &bindable };
    mobj->metacall(object, QMetaObject::BindableProperty, data.index(mobj) + mobj->propertyOffset(), argv);
    return bindable;
}
QVariant QMetaProperty::readOnGadget(const void *gadget) const
{
    Q_ASSERT(priv(mobj->d.data)->flags & PropertyAccessInStaticMetaCall && mobj->d.static_metacall);
    return read(reinterpret_cast<const QObject*>(gadget));
}
 
bool QMetaProperty::writeOnGadget(void *gadget, const QVariant &value) const
{
    Q_ASSERT(priv(mobj->d.data)->flags & PropertyAccessInStaticMetaCall && mobj->d.static_metacall);
    return write(reinterpret_cast<QObject*>(gadget), value);
}
 
bool QMetaProperty::writeOnGadget(void *gadget, QVariant &&value) const
{
    Q_ASSERT(priv(mobj->d.data)->flags & PropertyAccessInStaticMetaCall && mobj->d.static_metacall);
    return write(reinterpret_cast<QObject*>(gadget), std::move(value));
}
 
bool QMetaProperty::resetOnGadget(void *gadget) const
{
    Q_ASSERT(priv(mobj->d.data)->flags & PropertyAccessInStaticMetaCall && mobj->d.static_metacall);
    return reset(reinterpret_cast<QObject*>(gadget));
}
 
bool QMetaProperty::isResettable() const
{
    if (!mobj)
        return false;
    return data.flags() & Resettable;
}
 
bool QMetaProperty::isReadable() const
{
    if (!mobj)
        return false;
    return data.flags() & Readable;
}
 
bool QMetaProperty::hasNotifySignal() const
{
    if (!mobj)
        return false;
    return data.notifyIndex() != uint(-1);
}
 
QMetaMethod QMetaProperty::notifySignal() const
{
    int id = notifySignalIndex();
    if (id != -1)
        return mobj->method(id);
    else
        return QMetaMethod();
}
 
int QMetaProperty::notifySignalIndex() const
{
    if (!mobj || data.notifyIndex() == std::numeric_limits<uint>::max())
        return -1;
    uint methodIndex = data.notifyIndex();
    if (!(methodIndex & IsUnresolvedSignal))
        return methodIndex + mobj->methodOffset();
    methodIndex &= ~IsUnresolvedSignal;
    const QByteArray signalName = stringData(mobj, methodIndex);
    const QMetaObject *m = mobj;
    // try 0-arg signal
    int idx = QMetaObjectPrivate::indexOfMethodRelative<MethodSignal>(&m, signalName, 0, nullptr);
    if (idx >= 0)
        return idx + m->methodOffset();
    // try 1-arg signal
    QArgumentType argType(typeId());
    idx = QMetaObjectPrivate::indexOfMethodRelative<MethodSignal>(&m, signalName, 1, &argType);
    if (idx >= 0)
        return idx + m->methodOffset();
    qWarning("QMetaProperty::notifySignal: cannot find the NOTIFY signal %s in class %s for property '%s'",
             signalName.constData(), mobj->className(), name());
    return -1;
}
 
// This method has been around for a while, but the documentation was marked \internal until 5.1
int QMetaProperty::revision() const
{
    if (!mobj)
        return 0;
    return data.revision();
}
 
bool QMetaProperty::isWritable() const
{
    if (!mobj)
        return false;
    return data.flags() & Writable;
}
 
bool QMetaProperty::isDesignable() const
{
    if (!mobj)
        return false;
    return data.flags() & Designable;
}
 
bool QMetaProperty::isScriptable() const
{
    if (!mobj)
        return false;
    return data.flags() & Scriptable;
}
 
bool QMetaProperty::isStored() const
{
    if (!mobj)
        return false;
    return data.flags() & Stored;
}
 
bool QMetaProperty::isUser() const
{
    if (!mobj)
        return false;
    return data.flags() & User;
}
 
bool QMetaProperty::isConstant() const
{
    if (!mobj)
        return false;
    return data.flags() & Constant;
}
 
bool QMetaProperty::isFinal() const
{
    if (!mobj)
        return false;
    return data.flags() & Final;
}
 
bool QMetaProperty::isRequired() const
{
    if (!mobj)
        return false;
    return data.flags() & Required;
}
 
bool QMetaProperty::isBindable() const
{
    if (!mobj)
        return false;
    return (data.flags() & Bindable);
}
 
const char *QMetaClassInfo::name() const
{
    if (!mobj)
        return nullptr;
    return rawStringData(mobj, data.name());
}
 
const char *QMetaClassInfo::value() const
{
    if (!mobj)
        return nullptr;
    return rawStringData(mobj, data.value());
}
 
int QMetaObjectPrivate::originalClone(const QMetaObject *mobj, int local_method_index)
{
    Q_ASSERT(local_method_index < get(mobj)->methodCount);
    while (QMetaMethod::fromRelativeMethodIndex(mobj, local_method_index).data.flags() & MethodCloned) {
        Q_ASSERT(local_method_index > 0);
        --local_method_index;
    }
    return local_method_index;
}
 
QList<QByteArray> QMetaObjectPrivate::parameterTypeNamesFromSignature(const char *signature)
{
    QList<QByteArray> list;
    while (*signature && *signature != '(')
        ++signature;
    while (*signature && *signature != ')' && *++signature != ')') {
        const char *begin = signature;
        int level = 0;
        while (*signature && (level > 0 || *signature != ',') && *signature != ')') {
            if (*signature == '<')
                ++level;
            else if (*signature == '>')
                --level;
            ++signature;
        }
        list += QByteArray(begin, signature - begin);
    }
    return list;
}
 
QT_END_NAMESPACE