qmetatype.cpp

Go to the documentation of this file.

// Copyright (C) 2021 The Qt Company Ltd.
// Copyright (C) 2021 Klarälvdalens Datakonsult AB, a KDAB Group company, info@kdab.com
// Copyright (C) 2021 Intel Corporation.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
 
#include "qmetatype.h"
#include "qmetatype_p.h"
#include "qobjectdefs.h"
#include "qdatetime.h"
#include "qbytearray.h"
#include "qreadwritelock.h"
#include "qhash.h"
#include "qmap.h"
#include "qstring.h"
#include "qstringlist.h"
#include "qlist.h"
#include "qlocale.h"
#include "qdebug.h"
#if QT_CONFIG(easingcurve)
#include "qeasingcurve.h"
#endif
#include "quuid.h"
 
#if QT_CONFIG(regularexpression)
#  include "qregularexpression.h"
#endif
 
#ifndef QT_BOOTSTRAPPED
#  include "qdatastream.h"
 
#  include "qbitarray.h"
#  include "qurl.h"
#  include "qvariant.h"
#  include "qjsonvalue.h"
#  include "qjsonobject.h"
#  include "qjsonarray.h"
#  include "qjsondocument.h"
#  include "qcborvalue.h"
#  include "qcborarray.h"
#  include "qcbormap.h"
#  include "qbytearraylist.h"
#  include "qmetaobject.h"
#  include "qsequentialiterable.h"
#  include "qassociativeiterable.h"
#  include "qobject.h"
#endif
 
#if QT_CONFIG(itemmodel)
#  include "qabstractitemmodel.h"
#endif
 
#ifndef QT_NO_GEOM_VARIANT
# include "qsize.h"
# include "qpoint.h"
# include "qrect.h"
# include "qline.h"
#endif
 
#include <new>
#include <cstring>
 
QT_BEGIN_NAMESPACE
 
#define NS(x) QT_PREPEND_NAMESPACE(x)
 
QT_IMPL_METATYPE_EXTERN_TAGGED(QtMetaTypePrivate::QPairVariantInterfaceImpl, QPairVariantInterfaceImpl)
 
using QtMetaTypePrivate::isInterfaceFor;
 
namespace {
struct QMetaTypeDeleter
{
    const QtPrivate::QMetaTypeInterface *iface;
    void operator()(void *data)
    {
        if (iface->alignment > __STDCPP_DEFAULT_NEW_ALIGNMENT__) {
            operator delete(data, std::align_val_t(iface->alignment));
        } else {
            operator delete(data);
        }
    }
};
 
struct QMetaTypeCustomRegistry
{
 
#if QT_VERSION < QT_VERSION_CHECK(7, 0, 0) && !defined(QT_BOOTSTRAPPED)
    QMetaTypeCustomRegistry()
    {
        /* qfloat16 was neither a builtin, nor unconditionally registered
          in QtCore in Qt <= 6.2.
          Inserting it as an alias ensures that a QMetaType::id call
          will get the correct built-in type-id (the interface pointers
          might still not match, but we already deal with that case.
        */
        aliases.insert("qfloat16", QtPrivate::qMetaTypeInterfaceForType<qfloat16>());
    }
#endif
 
    QReadWriteLock lock;
    QList<const QtPrivate::QMetaTypeInterface *> registry;
    QHash<QByteArray, const QtPrivate::QMetaTypeInterface *> aliases;
    // index of first empty (unregistered) type in registry, if any.
    int firstEmpty = 0;
 
    int registerCustomType(const QtPrivate::QMetaTypeInterface *cti)
    {
        // we got here because cti->typeId is 0, so this is a custom meta type
        // (not read-only)
        auto ti = const_cast<QtPrivate::QMetaTypeInterface *>(cti);
        {
            QWriteLocker l(&lock);
            if (int id = ti->typeId.loadRelaxed())
                return id;
            QByteArray name =
#ifndef QT_NO_QOBJECT
                    QMetaObject::normalizedType
#endif
                    (ti->name);
            if (auto ti2 = aliases.value(name)) {
                const auto id = ti2->typeId.loadRelaxed();
                ti->typeId.storeRelaxed(id);
                return id;
            }
            aliases[name] = ti;
            int size = registry.size();
            while (firstEmpty < size && registry[firstEmpty])
                ++firstEmpty;
            if (firstEmpty < size) {
                registry[firstEmpty] = ti;
                ++firstEmpty;
            } else {
                registry.append(ti);
                firstEmpty = registry.size();
            }
            ti->typeId.storeRelaxed(firstEmpty + QMetaType::User);
        }
        if (ti->legacyRegisterOp)
            ti->legacyRegisterOp();
        return ti->typeId.loadRelaxed();
    };
 
    void unregisterDynamicType(int id)
    {
        if (!id)
            return;
        Q_ASSERT(id > QMetaType::User);
        QWriteLocker l(&lock);
        int idx = id - QMetaType::User - 1;
        auto &ti = registry[idx];
 
        // We must unregister all names.
        aliases.removeIf([ti] (const auto &kv) { return kv.value() == ti; });
 
        ti = nullptr;
 
        firstEmpty = std::min(firstEmpty, idx);
    }
 
    const QtPrivate::QMetaTypeInterface *getCustomType(int id)
    {
        QReadLocker l(&lock);
        return registry.value(id - QMetaType::User - 1);
    }
};
 
Q_GLOBAL_STATIC(QMetaTypeCustomRegistry, customTypeRegistry)
 
} // namespace
 
// used by QVariant::save(): returns the name used in the Q_DECLARE_METATYPE
// macro (one of them, indetermine which one)
const char *QtMetaTypePrivate::typedefNameForType(const QtPrivate::QMetaTypeInterface *type_d)
{
    const char *name = nullptr;
    if (!customTypeRegistry.exists())
        return name;
    QMetaTypeCustomRegistry *r = &*customTypeRegistry;
 
    QByteArrayView officialName(type_d->name);
    QReadLocker l(&r->lock);
    auto it = r->aliases.constBegin();
    auto end = r->aliases.constEnd();
    for ( ; it != end; ++it) {
        if (it.value() != type_d)
            continue;
        if (it.key() == officialName)
            continue;               // skip the official name
        name = it.key().constData();
        ++it;
        break;
    }
 
#ifndef QT_NO_DEBUG
    QByteArrayList otherNames;
    for ( ; it != end; ++it) {
        if (it.value() == type_d && it.key() != officialName)
            otherNames << it.key();
    }
    l.unlock();
    if (!otherNames.isEmpty())
        qWarning("QMetaType: type %s has more than one typedef alias: %s, %s",
                 type_d->name, name, otherNames.join(", ").constData());
#endif
 
    return name;
}
 
bool QMetaType::isValid() const
{
    return d_ptr;
}
 
bool QMetaType::isRegistered() const
{
    return d_ptr && d_ptr->typeId.loadRelaxed();
}
 
int QMetaType::registerHelper(const QtPrivate::QMetaTypeInterface *iface)
{
    Q_ASSERT(iface);
    auto reg = customTypeRegistry();
    if (reg) {
        return reg->registerCustomType(iface);
    }
    return 0;
}
 
void *QMetaType::create(const void *copy) const
{
    if (copy ? !isCopyConstructible() : !isDefaultConstructible())
        return nullptr;
 
    std::unique_ptr<void, QMetaTypeDeleter> where(nullptr, {d_ptr});
    if (d_ptr->alignment > __STDCPP_DEFAULT_NEW_ALIGNMENT__)
        where.reset(operator new(d_ptr->size, std::align_val_t(d_ptr->alignment)));
    else
        where.reset(operator new(d_ptr->size));
 
    QtMetaTypePrivate::construct(d_ptr, where.get(), copy);
    return where.release();
}
 
void QMetaType::destroy(void *data) const
{
    if (data && isDestructible()) {
        QtMetaTypePrivate::destruct(d_ptr, data);
        QMetaTypeDeleter{d_ptr}(data);
    }
}
 
void *QMetaType::construct(void *where, const void *copy) const
{
    if (!where)
        return nullptr;
    if (copy ? !isCopyConstructible() : !isDefaultConstructible())
        return nullptr;
 
    QtMetaTypePrivate::construct(d_ptr, where, copy);
    return where;
}
 
void QMetaType::destruct(void *data) const
{
    if (data && isDestructible())
        QtMetaTypePrivate::destruct(d_ptr, data);
}
 
static QPartialOrdering threeWayCompare(const void *ptr1, const void *ptr2)
{
    std::less<const void *> less;
    if (less(ptr1, ptr2))
        return QPartialOrdering::Less;
    if (less(ptr2, ptr1))
        return QPartialOrdering::Greater;
    return QPartialOrdering::Equivalent;
}
 
QPartialOrdering QMetaType::compare(const void *lhs, const void *rhs) const
{
    if (!lhs || !rhs)
        return QPartialOrdering::Unordered;
    if (d_ptr && d_ptr->flags & QMetaType::IsPointer)
        return threeWayCompare(*reinterpret_cast<const void * const *>(lhs),
                               *reinterpret_cast<const void * const *>(rhs));
    if (d_ptr && d_ptr->lessThan) {
        if (d_ptr->equals && d_ptr->equals(d_ptr, lhs, rhs))
            return QPartialOrdering::Equivalent;
        if (d_ptr->lessThan(d_ptr, lhs, rhs))
            return QPartialOrdering::Less;
        if (d_ptr->lessThan(d_ptr, rhs, lhs))
            return QPartialOrdering::Greater;
        if (!d_ptr->equals)
            return QPartialOrdering::Equivalent;
    }
    return QPartialOrdering::Unordered;
}
 
bool QMetaType::equals(const void *lhs, const void *rhs) const
{
    if (!lhs || !rhs)
        return false;
    if (d_ptr) {
        if (d_ptr->flags & QMetaType::IsPointer)
            return *reinterpret_cast<const void * const *>(lhs) == *reinterpret_cast<const void * const *>(rhs);
 
        if (d_ptr->equals)
            return d_ptr->equals(d_ptr, lhs, rhs);
        if (d_ptr->lessThan && !d_ptr->lessThan(d_ptr, lhs, rhs) && !d_ptr->lessThan(d_ptr, rhs, lhs))
            return true;
    }
    return false;
}
 
bool QMetaType::isDefaultConstructible(const QtPrivate::QMetaTypeInterface *iface) noexcept
{
    return !isInterfaceFor<void>(iface) && QtMetaTypePrivate::isDefaultConstructible(iface);
}
 
bool QMetaType::isCopyConstructible(const QtPrivate::QMetaTypeInterface *iface) noexcept
{
    return !isInterfaceFor<void>(iface) && QtMetaTypePrivate::isCopyConstructible(iface);
}
 
bool QMetaType::isMoveConstructible(const QtPrivate::QMetaTypeInterface *iface) noexcept
{
    return !isInterfaceFor<void>(iface) && QtMetaTypePrivate::isMoveConstructible(iface);
}
 
bool QMetaType::isDestructible(const QtPrivate::QMetaTypeInterface *iface) noexcept
{
    return !isInterfaceFor<void>(iface) && QtMetaTypePrivate::isDestructible(iface);
}
 
bool QMetaType::isEqualityComparable() const
{
    return d_ptr && (d_ptr->flags & QMetaType::IsPointer || d_ptr->equals != nullptr || d_ptr->lessThan != nullptr);
}
 
bool QMetaType::isOrdered() const
{
    return d_ptr && (d_ptr->flags & QMetaType::IsPointer || d_ptr->lessThan != nullptr);
}
 
 
void QMetaType::unregisterMetaType(QMetaType type)
{
    const QtPrivate::QMetaTypeInterface *d_ptr = type.d_ptr;
    if (!d_ptr)
        return;
 
    const int typeId = d_ptr->typeId.loadRelaxed();
    if (typeId < QMetaType::User)
        return;
 
    // this is a custom meta type (not read-only)
 
    if (auto reg = customTypeRegistry()) {
        Q_ASSERT(reg->getCustomType(typeId) == d_ptr);
        reg->unregisterDynamicType(typeId);
    }
 
    const_cast<QtPrivate::QMetaTypeInterface *>(d_ptr)->typeId.storeRelease(0);
}
 
bool QMetaTypeModuleHelper::convert(const void *, int, void *, int) const
{
    return false;
}
 
#define QT_ADD_STATIC_METATYPE(MetaTypeName, MetaTypeId, RealName) \
    { #RealName, sizeof(#RealName) - 1, MetaTypeId },
 
#define QT_ADD_STATIC_METATYPE_ALIASES_ITER(MetaTypeName, MetaTypeId, AliasingName, RealNameStr) \
    { RealNameStr, sizeof(RealNameStr) - 1, QMetaType::MetaTypeName },
 
 
 
static const struct { const char * typeName; int typeNameLength; int type; } types[] = {
    QT_FOR_EACH_STATIC_TYPE(QT_ADD_STATIC_METATYPE)
    QT_FOR_EACH_STATIC_ALIAS_TYPE(QT_ADD_STATIC_METATYPE_ALIASES_ITER)
    QT_ADD_STATIC_METATYPE(_, QMetaTypeId2<qreal>::MetaType, qreal)
    {nullptr, 0, QMetaType::UnknownType}
};
 
// NOLINTNEXTLINE(cppcoreguidelines-virtual-class-destructor): this is not a base class
static constexpr struct : QMetaTypeModuleHelper
{
    template<typename T, typename LiteralWrapper =
             std::conditional_t<std::is_same_v<T, QString>, QLatin1StringView, const char *>>
    static inline bool convertToBool(const T &source)
    {
        T str = source.toLower();
        return !(str.isEmpty() || str == LiteralWrapper("0") || str == LiteralWrapper("false"));
    }
 
    const QtPrivate::QMetaTypeInterface *interfaceForType(int type) const override {
        switch (type) {
            QT_FOR_EACH_STATIC_PRIMITIVE_TYPE(QT_METATYPE_CONVERT_ID_TO_TYPE)
            QT_FOR_EACH_STATIC_PRIMITIVE_POINTER(QT_METATYPE_CONVERT_ID_TO_TYPE)
            QT_FOR_EACH_STATIC_CORE_CLASS(QT_METATYPE_CONVERT_ID_TO_TYPE)
            QT_FOR_EACH_STATIC_CORE_POINTER(QT_METATYPE_CONVERT_ID_TO_TYPE)
            QT_FOR_EACH_STATIC_CORE_TEMPLATE(QT_METATYPE_CONVERT_ID_TO_TYPE)
        default:
            return nullptr;
        }
    }
 
    bool convert(const void *from, int fromTypeId, void *to, int toTypeId) const override
    {
        Q_ASSERT(fromTypeId != toTypeId);
 
        // canConvert calls with two nullptr
        bool onlyCheck = (from == nullptr && to == nullptr);
 
        // other callers must provide two valid pointers
        Q_ASSERT(onlyCheck || (bool(from) && bool(to)));
 
        using Char = char;
        using SChar = signed char;
        using UChar = unsigned char;
        using Short = short;
        using UShort = unsigned short;
        using Int = int;
        using UInt = unsigned int;
        using Long = long;
        using LongLong = qlonglong;
        using ULong = unsigned long;
        using ULongLong = qulonglong;
        using Float = float;
        using Double = double;
        using Bool = bool;
        using Nullptr = std::nullptr_t;
        using Char16 = char16_t;
        using Char32 = char32_t;
 
#define QMETATYPE_CONVERTER_ASSIGN_DOUBLE(To, From) \
    QMETATYPE_CONVERTER(To, From, result = double(source); return true;)
#define QMETATYPE_CONVERTER_ASSIGN_NUMBER(To, From) \
    QMETATYPE_CONVERTER(To, From, result = To::number(source); return true;)
#ifndef QT_BOOTSTRAPPED
#define CONVERT_CBOR_AND_JSON(To) \
    QMETATYPE_CONVERTER(To, QCborValue, \
        if constexpr(std::is_same_v<To, Bool>) { \
            if (!source.isBool()) \
                return false; \
            result = source.toBool(); \
        } else { \
            if (!source.isInteger() && !source.isDouble()) \
                return false; \
            if constexpr(std::is_integral_v<To>) \
                result = source.toInteger(); \
            else \
                result = source.toDouble(); \
        } \
        return true; \
    ); \
    QMETATYPE_CONVERTER(To, QJsonValue, \
        if constexpr(std::is_same_v<To, Bool>) { \
            if (!source.isBool()) \
                return false; \
            result = source.toBool(); \
        } else { \
            if (!source.isDouble()) \
                return false; \
            if constexpr(std::is_integral_v<To>) \
                result = source.toInteger(); \
            else \
                result = source.toDouble(); \
        } \
        return true; \
    )
#else
#define CONVERT_CBOR_AND_JSON(To)
#endif
 
#define INTEGRAL_CONVERTER(To) \
    QMETATYPE_CONVERTER_ASSIGN(To, Bool); \
    QMETATYPE_CONVERTER_ASSIGN(To, Char); \
    QMETATYPE_CONVERTER_ASSIGN(To, UChar); \
    QMETATYPE_CONVERTER_ASSIGN(To, SChar); \
    QMETATYPE_CONVERTER_ASSIGN(To, Short); \
    QMETATYPE_CONVERTER_ASSIGN(To, UShort); \
    QMETATYPE_CONVERTER_ASSIGN(To, Int); \
    QMETATYPE_CONVERTER_ASSIGN(To, UInt); \
    QMETATYPE_CONVERTER_ASSIGN(To, Long); \
    QMETATYPE_CONVERTER_ASSIGN(To, ULong); \
    QMETATYPE_CONVERTER_ASSIGN(To, LongLong); \
    QMETATYPE_CONVERTER_ASSIGN(To, ULongLong); \
    QMETATYPE_CONVERTER(To, Float, result = qRound64(source); return true;); \
    QMETATYPE_CONVERTER(To, Double, result = qRound64(source); return true;); \
    QMETATYPE_CONVERTER(To, QChar, result = source.unicode(); return true;); \
    QMETATYPE_CONVERTER(To, QString, \
        bool ok = false; \
        if constexpr(std::is_same_v<To, bool>) \
            result = (ok = true, convertToBool(source)); \
        else if constexpr(std::is_signed_v<To>) \
            result = To(source.toLongLong(&ok)); \
        else \
            result = To(source.toULongLong(&ok)); \
        return ok; \
    ); \
    QMETATYPE_CONVERTER(To, QByteArray, \
        bool ok = false; \
        if constexpr(std::is_same_v<To, bool>) \
            result = (ok = true, convertToBool(source)); \
        else if constexpr(std::is_signed_v<To>) \
            result = To(source.toLongLong(&ok)); \
        else \
            result = To(source.toULongLong(&ok)); \
        return ok; \
    ); \
    CONVERT_CBOR_AND_JSON(To)
 
#define FLOAT_CONVERTER(To) \
    QMETATYPE_CONVERTER_ASSIGN(To, Bool); \
    QMETATYPE_CONVERTER_ASSIGN(To, Char); \
    QMETATYPE_CONVERTER_ASSIGN(To, UChar); \
    QMETATYPE_CONVERTER_ASSIGN(To, SChar); \
    QMETATYPE_CONVERTER_ASSIGN(To, Short); \
    QMETATYPE_CONVERTER_ASSIGN(To, UShort); \
    QMETATYPE_CONVERTER_ASSIGN(To, Int); \
    QMETATYPE_CONVERTER_ASSIGN(To, UInt); \
    QMETATYPE_CONVERTER_ASSIGN(To, Long); \
    QMETATYPE_CONVERTER_ASSIGN(To, ULong); \
    QMETATYPE_CONVERTER_ASSIGN(To, LongLong); \
    QMETATYPE_CONVERTER_ASSIGN(To, ULongLong); \
    QMETATYPE_CONVERTER_ASSIGN(To, Float); \
    QMETATYPE_CONVERTER_ASSIGN(To, Double); \
    QMETATYPE_CONVERTER(To, QString, \
        bool ok = false; \
        result = source.toDouble(&ok); \
        return ok; \
    ); \
    QMETATYPE_CONVERTER(To, QByteArray, \
        bool ok = false; \
        result = source.toDouble(&ok); \
        return ok; \
    ); \
    CONVERT_CBOR_AND_JSON(To)
 
        switch (makePair(toTypeId, fromTypeId)) {
 
        // integral conversions
        INTEGRAL_CONVERTER(Bool);
        INTEGRAL_CONVERTER(Char);
        INTEGRAL_CONVERTER(UChar);
        INTEGRAL_CONVERTER(SChar);
        INTEGRAL_CONVERTER(Short);
        INTEGRAL_CONVERTER(UShort);
        INTEGRAL_CONVERTER(Int);
        INTEGRAL_CONVERTER(UInt);
        INTEGRAL_CONVERTER(Long);
        INTEGRAL_CONVERTER(ULong);
        INTEGRAL_CONVERTER(LongLong);
        INTEGRAL_CONVERTER(ULongLong);
        FLOAT_CONVERTER(Float);
        FLOAT_CONVERTER(Double);
 
#ifndef QT_BOOTSTRAPPED
        QMETATYPE_CONVERTER_ASSIGN(QUrl, QString);
        QMETATYPE_CONVERTER(QUrl, QCborValue,
            if (source.isUrl()) {
                result = source.toUrl();
                return true;
             }
            return false;
        );
#endif
#if QT_CONFIG(itemmodel)
        QMETATYPE_CONVERTER_ASSIGN(QModelIndex, QPersistentModelIndex);
        QMETATYPE_CONVERTER_ASSIGN(QPersistentModelIndex, QModelIndex);
#endif // QT_CONFIG(itemmodel)
 
        // QChar methods
#define QMETATYPE_CONVERTER_ASSIGN_QCHAR(From) \
        QMETATYPE_CONVERTER(QChar, From, result = QChar::fromUcs2(source); return true;)
        QMETATYPE_CONVERTER_ASSIGN_QCHAR(Char);
        QMETATYPE_CONVERTER_ASSIGN_QCHAR(SChar);
        QMETATYPE_CONVERTER_ASSIGN_QCHAR(Short);
        QMETATYPE_CONVERTER_ASSIGN_QCHAR(Long);
        QMETATYPE_CONVERTER_ASSIGN_QCHAR(Int);
        QMETATYPE_CONVERTER_ASSIGN_QCHAR(LongLong);
        QMETATYPE_CONVERTER_ASSIGN_QCHAR(Float);
        QMETATYPE_CONVERTER_ASSIGN_QCHAR(UChar);
        QMETATYPE_CONVERTER_ASSIGN_QCHAR(UShort);
        QMETATYPE_CONVERTER_ASSIGN_QCHAR(ULong);
        QMETATYPE_CONVERTER_ASSIGN_QCHAR(UInt);
        QMETATYPE_CONVERTER_ASSIGN_QCHAR(ULongLong);
        QMETATYPE_CONVERTER_ASSIGN_QCHAR(Char16);
 
        QMETATYPE_CONVERTER(Char16, QChar, result = source.unicode(); return true;)
 
        // conversions to QString
        QMETATYPE_CONVERTER_ASSIGN(QString, QChar);
        QMETATYPE_CONVERTER(QString, Bool,
            result = source ? QStringLiteral("true") : QStringLiteral("false");
            return true;
        );
        QMETATYPE_CONVERTER_ASSIGN_NUMBER(QString, Short);
        QMETATYPE_CONVERTER_ASSIGN_NUMBER(QString, Long);
        QMETATYPE_CONVERTER_ASSIGN_NUMBER(QString, Int);
        QMETATYPE_CONVERTER_ASSIGN_NUMBER(QString, LongLong);
        QMETATYPE_CONVERTER_ASSIGN_NUMBER(QString, UShort);
        QMETATYPE_CONVERTER_ASSIGN_NUMBER(QString, ULong);
        QMETATYPE_CONVERTER_ASSIGN_NUMBER(QString, UInt);
        QMETATYPE_CONVERTER_ASSIGN_NUMBER(QString, ULongLong);
        QMETATYPE_CONVERTER(QString, Float,
            result = QString::number(source, 'g', QLocale::FloatingPointShortest);
            return true;
        );
        QMETATYPE_CONVERTER(QString, Double,
            result = QString::number(source, 'g', QLocale::FloatingPointShortest);
            return true;
        );
        QMETATYPE_CONVERTER(QString, Char,
            result = QString::fromLatin1(&source, 1);
            return true;
        );
        QMETATYPE_CONVERTER(QString, SChar,
            char s = source;
            result = QString::fromLatin1(&s, 1);
            return true;
        );
        QMETATYPE_CONVERTER(QString, UChar,
            char s = source;
            result = QString::fromLatin1(&s, 1);
            return true;
        );
        QMETATYPE_CONVERTER(QString, Char16,
            result = QChar(source);
            return true;
        );
        QMETATYPE_CONVERTER(QString, Char32,
            result = QChar::fromUcs4(source).operator QStringView().toString();
            return true;
        );
#if QT_CONFIG(datestring)
        QMETATYPE_CONVERTER(QString, QDate, result = source.toString(Qt::ISODate); return true;);
        QMETATYPE_CONVERTER(QString, QTime, result = source.toString(Qt::ISODateWithMs); return true;);
        QMETATYPE_CONVERTER(QString, QDateTime, result = source.toString(Qt::ISODateWithMs); return true;);
#endif
        QMETATYPE_CONVERTER(QString, QByteArray, result = QString::fromUtf8(source); return true;);
        QMETATYPE_CONVERTER(QString, QStringList,
            return (source.size() == 1) ? (result = source.at(0), true) : false;
        );
#ifndef QT_BOOTSTRAPPED
        QMETATYPE_CONVERTER(QString, QUrl, result = source.toString(); return true;);
        QMETATYPE_CONVERTER(QString, QJsonValue,
            if (source.isString() || source.isNull()) {
                result = source.toString();
                return true;
            }
            return false;
        );
#endif
        QMETATYPE_CONVERTER(QString, Nullptr, Q_UNUSED(source); result = QString(); return true;);
 
        // QByteArray
        QMETATYPE_CONVERTER(QByteArray, QString, result = source.toUtf8(); return true;);
        QMETATYPE_CONVERTER(QByteArray, Bool,
            result = source ? "true" : "false";
            return true;
        );
        QMETATYPE_CONVERTER(QByteArray, Char, result = QByteArray(source, 1); return true;);
        QMETATYPE_CONVERTER(QByteArray, SChar, result = QByteArray(source, 1); return true;);
        QMETATYPE_CONVERTER(QByteArray, UChar, result = QByteArray(source, 1); return true;);
        QMETATYPE_CONVERTER_ASSIGN_NUMBER(QByteArray, Short);
        QMETATYPE_CONVERTER_ASSIGN_NUMBER(QByteArray, Long);
        QMETATYPE_CONVERTER_ASSIGN_NUMBER(QByteArray, Int);
        QMETATYPE_CONVERTER_ASSIGN_NUMBER(QByteArray, LongLong);
        QMETATYPE_CONVERTER_ASSIGN_NUMBER(QByteArray, UShort);
        QMETATYPE_CONVERTER_ASSIGN_NUMBER(QByteArray, ULong);
        QMETATYPE_CONVERTER_ASSIGN_NUMBER(QByteArray, UInt);
        QMETATYPE_CONVERTER_ASSIGN_NUMBER(QByteArray, ULongLong);
        QMETATYPE_CONVERTER(QByteArray, Float,
            result = QByteArray::number(source, 'g', QLocale::FloatingPointShortest);
            return true;
        );
        QMETATYPE_CONVERTER(QByteArray, Double,
            result = QByteArray::number(source, 'g', QLocale::FloatingPointShortest);
            return true;
        );
        QMETATYPE_CONVERTER(QByteArray, Nullptr, Q_UNUSED(source); result = QByteArray(); return true;);
 
        QMETATYPE_CONVERTER(QString, QUuid, result = source.toString(); return true;);
        QMETATYPE_CONVERTER(QUuid, QString, result = QUuid(source); return true;);
        QMETATYPE_CONVERTER(QByteArray, QUuid, result = source.toByteArray(); return true;);
        QMETATYPE_CONVERTER(QUuid, QByteArray, result = QUuid(source); return true;);
 
#ifndef QT_NO_GEOM_VARIANT
        QMETATYPE_CONVERTER(QSize, QSizeF, result = source.toSize(); return true;);
        QMETATYPE_CONVERTER_ASSIGN(QSizeF, QSize);
        QMETATYPE_CONVERTER(QLine, QLineF, result = source.toLine(); return true;);
        QMETATYPE_CONVERTER_ASSIGN(QLineF, QLine);
        QMETATYPE_CONVERTER(QRect, QRectF, result = source.toRect(); return true;);
        QMETATYPE_CONVERTER_ASSIGN(QRectF, QRect);
        QMETATYPE_CONVERTER(QPoint, QPointF, result = source.toPoint(); return true;);
        QMETATYPE_CONVERTER_ASSIGN(QPointF, QPoint);
#endif
 
        QMETATYPE_CONVERTER(QStringList, QString, result = QStringList() << source; return true;);
 
#ifndef QT_NO_VARIANT
        QMETATYPE_CONVERTER(QByteArrayList, QVariantList,
            result.reserve(source.size());
            for (const auto &v: source)
                result.append(v.toByteArray());
            return true;
        );
        QMETATYPE_CONVERTER(QVariantList, QByteArrayList,
            result.reserve(source.size());
            for (const auto &v: source)
                result.append(QVariant(v));
            return true;
        );
 
        QMETATYPE_CONVERTER(QStringList, QVariantList,
            result.reserve(source.size());
            for (const auto &v: source)
                result.append(v.toString());
            return true;
        );
        QMETATYPE_CONVERTER(QVariantList, QStringList,
            result.reserve(source.size());
            for (const auto &v: source)
                result.append(QVariant(v));
            return true;
        );
 
        QMETATYPE_CONVERTER(QVariantHash, QVariantMap,
            for (auto it = source.begin(); it != source.end(); ++it)
                result.insert(it.key(), it.value());
            return true;
        );
        QMETATYPE_CONVERTER(QVariantMap, QVariantHash,
            for (auto it = source.begin(); it != source.end(); ++it)
                result.insert(it.key(), it.value());
            return true;
        );
#endif // !QT_NO_VARIANT
#ifndef QT_BOOTSTRAPPED
        QMETATYPE_CONVERTER_ASSIGN(QCborValue, QString);
        QMETATYPE_CONVERTER(QString, QCborValue,
            if (source.isContainer() || source.isTag())
                 return false;
            result = source.toVariant().toString();
            return true;
        );
        QMETATYPE_CONVERTER_ASSIGN(QCborValue, QByteArray);
        QMETATYPE_CONVERTER(QByteArray, QCborValue,
            if (source.isByteArray()) {
                result = source.toByteArray();
                return true;
            }
            return false;
        );
        QMETATYPE_CONVERTER_ASSIGN(QCborValue, QUuid);
        QMETATYPE_CONVERTER(QUuid, QCborValue,
            if (!source.isUuid())
                return false;
            result = source.toUuid();
            return true;
        );
        QMETATYPE_CONVERTER(QCborValue, QVariantList, result = QCborArray::fromVariantList(source); return true;);
        QMETATYPE_CONVERTER(QVariantList, QCborValue,
            if (!source.isArray())
                return false;
            result = source.toArray().toVariantList();
            return true;
        );
        QMETATYPE_CONVERTER(QCborValue, QVariantMap, result = QCborMap::fromVariantMap(source); return true;);
        QMETATYPE_CONVERTER(QVariantMap, QCborValue,
            if (!source.isMap())
                return false;
                result = source.toMap().toVariantMap();
            return true;
        );
        QMETATYPE_CONVERTER(QCborValue, QVariantHash, result = QCborMap::fromVariantHash(source); return true;);
        QMETATYPE_CONVERTER(QVariantHash, QCborValue,
            if (!source.isMap())
                return false;
            result = source.toMap().toVariantHash();
            return true;
        );
#if QT_CONFIG(regularexpression)
        QMETATYPE_CONVERTER(QCborValue, QRegularExpression, result = QCborValue(source); return true;);
        QMETATYPE_CONVERTER(QRegularExpression, QCborValue,
            if (!source.isRegularExpression())
                return false;
            result = source.toRegularExpression();
            return true;
        );
#endif
 
        QMETATYPE_CONVERTER(QCborValue, Nullptr,
            Q_UNUSED(source);
            result = QCborValue(QCborValue::Null);
            return true;
        );
        QMETATYPE_CONVERTER(Nullptr, QCborValue,
            result = nullptr;
            return source.isNull();
        );
        QMETATYPE_CONVERTER_ASSIGN(QCborValue, Bool);
        QMETATYPE_CONVERTER_ASSIGN(QCborValue, Int);
        QMETATYPE_CONVERTER_ASSIGN(QCborValue, UInt);
        QMETATYPE_CONVERTER(QCborValue, ULong, result = qlonglong(source); return true;);
        QMETATYPE_CONVERTER(QCborValue, Long, result = qlonglong(source); return true;);
        QMETATYPE_CONVERTER_ASSIGN(QCborValue, LongLong);
        QMETATYPE_CONVERTER(QCborValue, ULongLong, result = qlonglong(source); return true;);
        QMETATYPE_CONVERTER_ASSIGN(QCborValue, UShort);
        QMETATYPE_CONVERTER_ASSIGN(QCborValue, UChar);
        QMETATYPE_CONVERTER_ASSIGN(QCborValue, Char);
        QMETATYPE_CONVERTER_ASSIGN(QCborValue, SChar);
        QMETATYPE_CONVERTER_ASSIGN(QCborValue, Short);
        QMETATYPE_CONVERTER_ASSIGN(QCborValue, Double);
        QMETATYPE_CONVERTER_ASSIGN(QCborValue, Float);
        QMETATYPE_CONVERTER(QCborValue, QStringList,
            result = QCborArray::fromStringList(source);
            return true;
        );
        QMETATYPE_CONVERTER(QCborValue, QDate,
            result = QCborValue(source.startOfDay());
            return true;
        );
        QMETATYPE_CONVERTER_ASSIGN(QCborValue, QUrl);
        QMETATYPE_CONVERTER(QCborValue, QJsonValue,
            result = QCborValue::fromJsonValue(source);
            return true;
        );
        QMETATYPE_CONVERTER(QCborValue, QJsonObject,
            result = QCborMap::fromJsonObject(source);
            return true;
        );
        QMETATYPE_CONVERTER(QCborValue, QJsonArray,
            result = QCborArray::fromJsonArray(source);
            return true;
        );
        QMETATYPE_CONVERTER(QCborValue, QJsonDocument,
            QJsonDocument doc = source;
            if (doc.isArray())
                result = QCborArray::fromJsonArray(doc.array());
            else
                result = QCborMap::fromJsonObject(doc.object());
            return true;
        );
        QMETATYPE_CONVERTER_ASSIGN(QCborValue, QCborMap);
        QMETATYPE_CONVERTER_ASSIGN(QCborValue, QCborArray);
 
        QMETATYPE_CONVERTER_ASSIGN(QCborValue, QDateTime);
        QMETATYPE_CONVERTER(QDateTime, QCborValue,
            if (source.isDateTime()) {
                result = source.toDateTime();
                return true;
            }
            return false;
        );
 
        QMETATYPE_CONVERTER_ASSIGN(QCborValue, QCborSimpleType);
        QMETATYPE_CONVERTER(QCborSimpleType, QCborValue,
            if (source.isSimpleType()) {
                 result = source.toSimpleType();
                 return true;
             }
             return false;
        );
 
        QMETATYPE_CONVERTER(QCborArray, QVariantList, result = QCborArray::fromVariantList(source); return true;);
        QMETATYPE_CONVERTER(QVariantList, QCborArray, result = source.toVariantList(); return true;);
        QMETATYPE_CONVERTER(QCborArray, QStringList, result = QCborArray::fromStringList(source); return true;);
        QMETATYPE_CONVERTER(QCborMap, QVariantMap, result = QCborMap::fromVariantMap(source); return true;);
        QMETATYPE_CONVERTER(QVariantMap, QCborMap, result = source.toVariantMap(); return true;);
        QMETATYPE_CONVERTER(QCborMap, QVariantHash, result = QCborMap::fromVariantHash(source); return true;);
        QMETATYPE_CONVERTER(QVariantHash, QCborMap, result = source.toVariantHash(); return true;);
 
        QMETATYPE_CONVERTER(QCborArray, QCborValue,
            if (!source.isArray())
                return false;
            result = source.toArray();
            return true;
        );
        QMETATYPE_CONVERTER(QCborArray, QJsonDocument,
            if (!source.isArray())
                return false;
            result = QCborArray::fromJsonArray(source.array());
            return true;
        );
        QMETATYPE_CONVERTER(QCborArray, QJsonValue,
            if (!source.isArray())
                return false;
            result = QCborArray::fromJsonArray(source.toArray());
            return true;
        );
        QMETATYPE_CONVERTER(QCborArray, QJsonArray,
            result = QCborArray::fromJsonArray(source);
            return true;
        );
        QMETATYPE_CONVERTER(QCborMap, QCborValue,
            if (!source.isMap())
                return false;
            result = source.toMap();
            return true;
        );
        QMETATYPE_CONVERTER(QCborMap, QJsonDocument,
            if (source.isArray())
                return false;
            result = QCborMap::fromJsonObject(source.object());
            return true;
        );
        QMETATYPE_CONVERTER(QCborMap, QJsonValue,
            if (!source.isObject())
                return false;
            result = QCborMap::fromJsonObject(source.toObject());
            return true;
        );
        QMETATYPE_CONVERTER(QCborMap, QJsonObject,
            result = QCborMap::fromJsonObject(source);
            return true;
        );
 
 
        QMETATYPE_CONVERTER(QVariantList, QJsonValue,
            if (!source.isArray())
                return false;
            result = source.toArray().toVariantList();
            return true;
        );
        QMETATYPE_CONVERTER(QVariantList, QJsonArray, result = source.toVariantList(); return true;);
        QMETATYPE_CONVERTER(QVariantMap, QJsonValue,
            if (!source.isObject())
                return false;
            result = source.toObject().toVariantMap();
            return true;
        );
        QMETATYPE_CONVERTER(QVariantMap, QJsonObject, result = source.toVariantMap(); return true;);
        QMETATYPE_CONVERTER(QVariantHash, QJsonValue,
            if (!source.isObject())
                return false;
            result = source.toObject().toVariantHash();
            return true;
        );
        QMETATYPE_CONVERTER(QVariantHash, QJsonObject, result = source.toVariantHash(); return true;);
 
 
        QMETATYPE_CONVERTER(QJsonArray, QStringList, result = QJsonArray::fromStringList(source); return true;);
        QMETATYPE_CONVERTER(QJsonArray, QVariantList, result = QJsonArray::fromVariantList(source); return true;);
        QMETATYPE_CONVERTER(QJsonArray, QJsonValue,
            if (!source.isArray())
                return false;
            result = source.toArray();
            return true;
        );
        QMETATYPE_CONVERTER(QJsonArray, QJsonDocument,
            if (!source.isArray())
                return false;
            result = source.array();
            return true;
        );
        QMETATYPE_CONVERTER(QJsonArray, QCborValue,
            if (!source.isArray())
                return false;
            result = source.toArray().toJsonArray();
            return true;
        );
        QMETATYPE_CONVERTER(QJsonArray, QCborArray, result = source.toJsonArray(); return true;);
        QMETATYPE_CONVERTER(QJsonObject, QVariantMap, result = QJsonObject::fromVariantMap(source); return true;);
        QMETATYPE_CONVERTER(QJsonObject, QVariantHash, result = QJsonObject::fromVariantHash(source); return true;);
        QMETATYPE_CONVERTER(QJsonObject, QJsonValue,
            if (!source.isObject())
                return false;
            result = source.toObject();
            return true;
        );
        QMETATYPE_CONVERTER(QJsonObject, QJsonDocument,
            if (source.isArray())
                return false;
            result = source.object();
            return true;
        );
        QMETATYPE_CONVERTER(QJsonObject, QCborValue,
            if (!source.isMap())
                return false;
            result = source.toMap().toJsonObject();
            return true;
        );
        QMETATYPE_CONVERTER(QJsonObject, QCborMap, result = source.toJsonObject(); return true; );
 
        QMETATYPE_CONVERTER(QJsonValue, Nullptr,
            Q_UNUSED(source);
            result = QJsonValue(QJsonValue::Null);
            return true;
        );
        QMETATYPE_CONVERTER(Nullptr, QJsonValue,
            result = nullptr;
            return source.isNull();
        );
        QMETATYPE_CONVERTER(QJsonValue, Bool,
            result = QJsonValue(source);
            return true;);
        QMETATYPE_CONVERTER_ASSIGN_DOUBLE(QJsonValue, Int);
        QMETATYPE_CONVERTER_ASSIGN_DOUBLE(QJsonValue, UInt);
        QMETATYPE_CONVERTER_ASSIGN_DOUBLE(QJsonValue, Double);
        QMETATYPE_CONVERTER_ASSIGN_DOUBLE(QJsonValue, Float);
        QMETATYPE_CONVERTER_ASSIGN_DOUBLE(QJsonValue, ULong);
        QMETATYPE_CONVERTER_ASSIGN_DOUBLE(QJsonValue, Long);
        QMETATYPE_CONVERTER_ASSIGN_DOUBLE(QJsonValue, LongLong);
        QMETATYPE_CONVERTER_ASSIGN_DOUBLE(QJsonValue, ULongLong);
        QMETATYPE_CONVERTER_ASSIGN_DOUBLE(QJsonValue, UShort);
        QMETATYPE_CONVERTER_ASSIGN_DOUBLE(QJsonValue, UChar);
        QMETATYPE_CONVERTER_ASSIGN_DOUBLE(QJsonValue, Char);
        QMETATYPE_CONVERTER_ASSIGN_DOUBLE(QJsonValue, SChar);
        QMETATYPE_CONVERTER_ASSIGN_DOUBLE(QJsonValue, Short);
        QMETATYPE_CONVERTER_ASSIGN(QJsonValue, QString);
        QMETATYPE_CONVERTER(QJsonValue, QStringList,
            result = QJsonValue(QJsonArray::fromStringList(source));
            return true;
        );
        QMETATYPE_CONVERTER(QJsonValue, QVariantList,
            result = QJsonValue(QJsonArray::fromVariantList(source));
            return true;
        );
        QMETATYPE_CONVERTER(QJsonValue, QVariantMap,
            result = QJsonValue(QJsonObject::fromVariantMap(source));
            return true;
        );
        QMETATYPE_CONVERTER(QJsonValue, QVariantHash,
            result = QJsonValue(QJsonObject::fromVariantHash(source));
            return true;
        );
        QMETATYPE_CONVERTER(QJsonValue, QJsonObject,
            result = source;
            return true;
        );
        QMETATYPE_CONVERTER(QJsonValue, QJsonArray,
            result = source;
            return true;
        );
        QMETATYPE_CONVERTER(QJsonValue, QJsonDocument,
            QJsonDocument doc = source;
            result = doc.isArray() ? QJsonValue(doc.array()) : QJsonValue(doc.object());
            return true;
        );
        QMETATYPE_CONVERTER(QJsonValue, QCborValue,
            result = source.toJsonValue();
            return true;
        );
        QMETATYPE_CONVERTER(QJsonValue, QCborMap,
            result = source.toJsonObject();
            return true;
        );
        QMETATYPE_CONVERTER(QJsonValue, QCborArray,
            result = source.toJsonArray();
            return true;
        );
 
#endif
 
        QMETATYPE_CONVERTER(QDate, QDateTime, result = source.date(); return true;);
        QMETATYPE_CONVERTER(QTime, QDateTime, result = source.time(); return true;);
        QMETATYPE_CONVERTER(QDateTime, QDate, result = source.startOfDay(); return true;);
#if QT_CONFIG(datestring)
        QMETATYPE_CONVERTER(QDate, QString,
            result = QDate::fromString(source, Qt::ISODate);
            return result.isValid();
        );
        QMETATYPE_CONVERTER(QTime, QString,
            result = QTime::fromString(source, Qt::ISODate);
            return result.isValid();
        );
        QMETATYPE_CONVERTER(QDateTime, QString,
            result = QDateTime::fromString(source, Qt::ISODate);
            return result.isValid();
        );
#endif
 
        }
        return false;
    }
} metatypeHelper = {};
 
Q_CONSTINIT Q_CORE_EXPORT const QMetaTypeModuleHelper *qMetaTypeGuiHelper = nullptr;
Q_CONSTINIT Q_CORE_EXPORT const QMetaTypeModuleHelper *qMetaTypeWidgetsHelper = nullptr;
 
static const QMetaTypeModuleHelper *qModuleHelperForType(int type)
{
    if (type <= QMetaType::LastCoreType)
        return &metatypeHelper;
    if (type >= QMetaType::FirstGuiType && type <= QMetaType::LastGuiType)
        return qMetaTypeGuiHelper;
    else if (type >= QMetaType::FirstWidgetsType && type <= QMetaType::LastWidgetsType)
        return qMetaTypeWidgetsHelper;
    return nullptr;
}
 
template<typename T, typename Key>
class QMetaTypeFunctionRegistry
{
public:
    ~QMetaTypeFunctionRegistry()
    {
        const QWriteLocker locker(&lock);
        map.clear();
    }
 
    bool contains(Key k) const
    {
        const QReadLocker locker(&lock);
        return map.contains(k);
    }
 
    bool insertIfNotContains(Key k, const T &f)
    {
        const QWriteLocker locker(&lock);
        const qsizetype oldSize = map.size();
        auto &e = map[k];
        if (map.size() == oldSize) // already present
            return false;
        e = f;
        return true;
    }
 
    const T *function(Key k) const
    {
        const QReadLocker locker(&lock);
        auto it = map.find(k);
        return it == map.end() ? nullptr : std::addressof(*it);
    }
 
    void remove(int from, int to)
    {
        const Key k(from, to);
        const QWriteLocker locker(&lock);
        map.remove(k);
    }
private:
    mutable QReadWriteLock lock;
    QHash<Key, T> map;
};
 
using QMetaTypeConverterRegistry
        = QMetaTypeFunctionRegistry<QMetaType::ConverterFunction, std::pair<int,int>>;
 
Q_GLOBAL_STATIC(QMetaTypeConverterRegistry, customTypesConversionRegistry)
 
using QMetaTypeMutableViewRegistry
        = QMetaTypeFunctionRegistry<QMetaType::MutableViewFunction, std::pair<int,int>>;
Q_GLOBAL_STATIC(QMetaTypeMutableViewRegistry, customTypesMutableViewRegistry)
 
bool QMetaType::registerConverterFunction(const ConverterFunction &f, QMetaType from, QMetaType to)
{
    if (!customTypesConversionRegistry()->insertIfNotContains({from.id(), to.id()}, f)) {
        qWarning("Type conversion already registered from type %s to type %s",
                 from.name(), to.name());
        return false;
    }
    return true;
}
 
bool QMetaType::registerMutableViewFunction(const MutableViewFunction &f, QMetaType from, QMetaType to)
{
    if (!customTypesMutableViewRegistry()->insertIfNotContains({from.id(), to.id()}, f)) {
        qWarning("Mutable view on type already registered from type %s to type %s",
                 from.name(), to.name());
        return false;
    }
    return true;
}
 
void QMetaType::unregisterMutableViewFunction(QMetaType from, QMetaType to)
{
    if (customTypesMutableViewRegistry.isDestroyed())
        return;
    customTypesMutableViewRegistry()->remove(from.id(), to.id());
}
 
void QMetaType::unregisterConverterFunction(QMetaType from, QMetaType to)
{
    if (customTypesConversionRegistry.isDestroyed())
        return;
    customTypesConversionRegistry()->remove(from.id(), to.id());
}
 
#ifndef QT_NO_DEBUG_STREAM
 
QDebug operator<<(QDebug d, QMetaType m)
{
    const QDebugStateSaver saver(d);
    return d.nospace() << "QMetaType(" << m.name() << ")";
}
 
bool QMetaType::debugStream(QDebug& dbg, const void *rhs)
{
    if (d_ptr && d_ptr->flags & QMetaType::IsPointer) {
        dbg << *reinterpret_cast<const void * const *>(rhs);
        return true;
    }
    if (d_ptr && d_ptr->debugStream) {
        d_ptr->debugStream(d_ptr, dbg, rhs);
        return true;
    }
    return false;
}
 
bool QMetaType::hasRegisteredDebugStreamOperator() const
{
    return d_ptr && d_ptr->debugStream != nullptr;
}
#endif
 
#ifndef QT_NO_QOBJECT
static QMetaEnum metaEnumFromType(QMetaType t)
{
    if (t.flags() & QMetaType::IsEnumeration) {
        if (const QMetaObject *metaObject = t.metaObject()) {
            QByteArrayView qflagsNamePrefix = "QFlags<";
            QByteArray enumName = t.name();
            if (enumName.endsWith('>') && enumName.startsWith(qflagsNamePrefix)) {
                // extract the template argument
                enumName.chop(1);
                enumName = enumName.sliced(qflagsNamePrefix.size());
            }
            if (qsizetype lastColon = enumName.lastIndexOf(':'); lastColon != -1)
                enumName = enumName.sliced(lastColon + 1);
            return metaObject->enumerator(metaObject->indexOfEnumerator(enumName));
        }
    }
    return QMetaEnum();
}
#endif
 
static bool convertFromEnum(QMetaType fromType, const void *from, QMetaType toType, void *to)
{
    qlonglong ll;
    if (fromType.flags() & QMetaType::IsUnsignedEnumeration) {
        qulonglong ull;
        switch (fromType.sizeOf()) {
        case 1:
            ull = *static_cast<const unsigned char *>(from);
            break;
        case 2:
            ull = *static_cast<const unsigned short *>(from);
            break;
        case 4:
            ull = *static_cast<const unsigned int *>(from);
            break;
        case 8:
            ull = *static_cast<const quint64 *>(from);
            break;
        default:
            Q_UNREACHABLE();
        }
        if (toType.id() == QMetaType::ULongLong) {
            *static_cast<qulonglong *>(to) = ull;
            return true;
        }
        if (toType.id() != QMetaType::QString && toType.id() != QMetaType::QByteArray)
            return QMetaType::convert(QMetaType::fromType<qulonglong>(), &ull, toType, to);
        ll = qlonglong(ull);
    } else {
        switch (fromType.sizeOf()) {
        case 1:
            ll = *static_cast<const signed char *>(from);
            break;
        case 2:
            ll = *static_cast<const short *>(from);
            break;
        case 4:
            ll = *static_cast<const int *>(from);
            break;
        case 8:
            ll = *static_cast<const qint64 *>(from);
            break;
        default:
            Q_UNREACHABLE();
        }
        if (toType.id() == QMetaType::LongLong) {
            *static_cast<qlonglong *>(to) = ll;
            return true;
        }
        if (toType.id() != QMetaType::QString && toType.id() != QMetaType::QByteArray)
            return QMetaType::convert(QMetaType::fromType<qlonglong>(), &ll, toType, to);
    }
#ifndef QT_NO_QOBJECT
    QMetaEnum en = metaEnumFromType(fromType);
    if (en.isValid()) {
        if (en.isFlag()) {
            const QByteArray keys = en.valueToKeys(static_cast<int>(ll));
            if (toType.id() == QMetaType::QString)
                *static_cast<QString *>(to) = QString::fromUtf8(keys);
            else
                *static_cast<QByteArray *>(to) = keys;
        } else {
            const char *key = en.valueToKey(static_cast<int>(ll));
            if (toType.id() == QMetaType::QString)
                *static_cast<QString *>(to) = QString::fromUtf8(key);
            else
                *static_cast<QByteArray *>(to) = key;
        }
        return true;
    }
#endif
    if (toType.id() == QMetaType::QString || toType.id() == QMetaType::QByteArray)
        return QMetaType::convert(QMetaType::fromType<qlonglong>(), &ll, toType, to);
    return false;
}
 
static bool convertToEnum(QMetaType fromType, const void *from, QMetaType toType, void *to)
{
    int fromTypeId = fromType.id();
    qlonglong value = -1;
    bool ok = false;
#ifndef QT_NO_QOBJECT
    if (fromTypeId == QMetaType::QString || fromTypeId == QMetaType::QByteArray) {
        QMetaEnum en = metaEnumFromType(toType);
        if (en.isValid()) {
            QByteArray keys = (fromTypeId == QMetaType::QString)
                    ? static_cast<const QString *>(from)->toUtf8()
                    : *static_cast<const QByteArray *>(from);
            value = en.keysToValue(keys.constData(), &ok);
        }
    }
#endif
    if (!ok) {
        if (fromTypeId == QMetaType::LongLong) {
            value = *static_cast<const qlonglong *>(from);
            ok = true;
        } else {
            ok = QMetaType::convert(fromType, from, QMetaType::fromType<qlonglong>(), &value);
        }
    }
 
    if (!ok)
        return false;
 
    switch (toType.sizeOf()) {
    case 1:
        *static_cast<signed char *>(to) = value;
        return true;
    case 2:
        *static_cast<qint16 *>(to) = value;
        return true;
    case 4:
        *static_cast<qint32 *>(to) = value;
        return true;
    case 8:
        *static_cast<qint64 *>(to) = value;
        return true;
    default:
        Q_UNREACHABLE_RETURN(false);
    }
}
 
#ifndef QT_BOOTSTRAPPED
static bool convertIterableToVariantList(QMetaType fromType, const void *from, void *to)
{
    QSequentialIterable list;
    if (!QMetaType::convert(fromType, from, QMetaType::fromType<QSequentialIterable>(), &list))
        return false;
 
    QVariantList &l = *static_cast<QVariantList *>(to);
    l.clear();
    l.reserve(list.size());
    auto end = list.end();
    for (auto it = list.begin(); it != end; ++it)
        l << *it;
    return true;
}
 
static bool convertIterableToVariantMap(QMetaType fromType, const void *from, void *to)
{
    QAssociativeIterable map;
    if (!QMetaType::convert(fromType, from, QMetaType::fromType<QAssociativeIterable>(), &map))
        return false;
 
    QVariantMap &h = *static_cast<QVariantMap *>(to);
    h.clear();
    auto end = map.end();
    for (auto it = map.begin(); it != end; ++it)
        h.insert(it.key().toString(), it.value());
    return true;
}
 
static bool convertIterableToVariantHash(QMetaType fromType, const void *from, void *to)
{
    QAssociativeIterable map;
    if (!QMetaType::convert(fromType, from, QMetaType::fromType<QAssociativeIterable>(), &map))
        return false;
 
    QVariantHash &h = *static_cast<QVariantHash *>(to);
    h.clear();
    h.reserve(map.size());
    auto end = map.end();
    for (auto it = map.begin(); it != end; ++it)
        h.insert(it.key().toString(), it.value());
    return true;
}
 
static bool convertIterableToVariantPair(QMetaType fromType, const void *from, void *to)
{
    const int targetId = qMetaTypeId<QtMetaTypePrivate::QPairVariantInterfaceImpl>();
    const auto f = customTypesConversionRegistry()->function({fromType.id(), targetId});
 
    if (!f)
        return false;
 
    QtMetaTypePrivate::QPairVariantInterfaceImpl pi;
    (*f)(from, &pi);
 
    QVariant v1(pi._metaType_first);
    void *dataPtr;
    if (pi._metaType_first == QMetaType::fromType<QVariant>())
        dataPtr = &v1;
    else
        dataPtr = v1.data();
    pi.first(dataPtr);
 
    QVariant v2(pi._metaType_second);
    if (pi._metaType_second == QMetaType::fromType<QVariant>())
        dataPtr = &v2;
    else
        dataPtr = v2.data();
    pi.second(dataPtr);
 
    *static_cast<QVariantPair *>(to) = QVariantPair(v1, v2);
    return true;
}
 
static bool convertToSequentialIterable(QMetaType fromType, const void *from, void *to)
{
    using namespace QtMetaTypePrivate;
    const int fromTypeId = fromType.id();
 
    QSequentialIterable &i = *static_cast<QSequentialIterable *>(to);
    switch (fromTypeId) {
    case QMetaType::QVariantList:
        i = QSequentialIterable(reinterpret_cast<const QVariantList *>(from));
        return true;
    case QMetaType::QStringList:
        i = QSequentialIterable(reinterpret_cast<const QStringList *>(from));
        return true;
    case QMetaType::QByteArrayList:
        i = QSequentialIterable(reinterpret_cast<const QByteArrayList *>(from));
        return true;
    case QMetaType::QString:
        i = QSequentialIterable(reinterpret_cast<const QString *>(from));
        return true;
    case QMetaType::QByteArray:
        i = QSequentialIterable(reinterpret_cast<const QByteArray *>(from));
        return true;
    default: {
        QSequentialIterable impl;
        if (QMetaType::convert(
                    fromType, from, QMetaType::fromType<QIterable<QMetaSequence>>(), &impl)) {
            i = std::move(impl);
            return true;
        }
    }
    }
 
    return false;
}
 
static bool canConvertToSequentialIterable(QMetaType fromType)
{
    switch (fromType.id()) {
    case QMetaType::QVariantList:
    case QMetaType::QStringList:
    case QMetaType::QByteArrayList:
    case QMetaType::QString:
    case QMetaType::QByteArray:
        return true;
    default:
        return QMetaType::canConvert(fromType, QMetaType::fromType<QIterable<QMetaSequence>>());
    }
}
 
static bool canImplicitlyViewAsSequentialIterable(QMetaType fromType)
{
    switch (fromType.id()) {
    case QMetaType::QVariantList:
    case QMetaType::QStringList:
    case QMetaType::QByteArrayList:
    case QMetaType::QString:
    case QMetaType::QByteArray:
        return true;
    default:
        return QMetaType::canView(
                    fromType, QMetaType::fromType<QIterable<QMetaSequence>>());
    }
}
 
static bool viewAsSequentialIterable(QMetaType fromType, void *from, void *to)
{
    using namespace QtMetaTypePrivate;
    const int fromTypeId = fromType.id();
 
    QSequentialIterable &i = *static_cast<QSequentialIterable *>(to);
    switch (fromTypeId) {
    case QMetaType::QVariantList:
        i = QSequentialIterable(reinterpret_cast<QVariantList *>(from));
        return true;
    case QMetaType::QStringList:
        i = QSequentialIterable(reinterpret_cast<QStringList *>(from));
        return true;
    case QMetaType::QByteArrayList:
        i = QSequentialIterable(reinterpret_cast<QByteArrayList *>(from));
        return true;
    case QMetaType::QString:
        i = QSequentialIterable(reinterpret_cast<QString *>(from));
        return true;
    case QMetaType::QByteArray:
        i = QSequentialIterable(reinterpret_cast<QByteArray *>(from));
        return true;
    default: {
        QIterable<QMetaSequence> j(QMetaSequence(), nullptr);
        if (QMetaType::view(
                    fromType, from, QMetaType::fromType<QIterable<QMetaSequence>>(), &j)) {
            i = std::move(j);
            return true;
        }
    }
    }
 
    return false;
}
 
static bool convertToAssociativeIterable(QMetaType fromType, const void *from, void *to)
{
    using namespace QtMetaTypePrivate;
 
    QAssociativeIterable &i = *static_cast<QAssociativeIterable *>(to);
    if (fromType.id() == QMetaType::QVariantMap) {
        i = QAssociativeIterable(reinterpret_cast<const QVariantMap *>(from));
        return true;
    }
    if (fromType.id() == QMetaType::QVariantHash) {
        i = QAssociativeIterable(reinterpret_cast<const QVariantHash *>(from));
        return true;
    }
 
    QAssociativeIterable impl;
    if (QMetaType::convert(
                fromType, from, QMetaType::fromType<QIterable<QMetaAssociation>>(), &impl)) {
        i = std::move(impl);
        return true;
    }
 
    return false;
}
 
static bool canConvertMetaObject(QMetaType fromType, QMetaType toType)
{
    if ((fromType.flags() & QMetaType::IsPointer) != (toType.flags() & QMetaType::IsPointer))
        return false; // Can not convert between pointer and value
 
    const QMetaObject *f = fromType.metaObject();
    const QMetaObject *t = toType.metaObject();
    if (f && t) {
        return f->inherits(t) || (t->inherits(f));
    }
    return false;
}
 
static bool canConvertToAssociativeIterable(QMetaType fromType)
{
    switch (fromType.id()) {
    case QMetaType::QVariantMap:
    case QMetaType::QVariantHash:
        return true;
    default:
        return QMetaType::canConvert(fromType, QMetaType::fromType<QIterable<QMetaAssociation>>());
    }
}
 
static bool canImplicitlyViewAsAssociativeIterable(QMetaType fromType)
{
    switch (fromType.id()) {
    case QMetaType::QVariantMap:
    case QMetaType::QVariantHash:
        return true;
    default:
        return QMetaType::canView(
                    fromType, QMetaType::fromType<QIterable<QMetaAssociation>>());
    }
}
 
static bool viewAsAssociativeIterable(QMetaType fromType, void *from, void *to)
{
    using namespace QtMetaTypePrivate;
    int fromTypeId = fromType.id();
 
    QAssociativeIterable &i = *static_cast<QAssociativeIterable *>(to);
    if (fromTypeId == QMetaType::QVariantMap) {
        i = QAssociativeIterable(reinterpret_cast<QVariantMap *>(from));
        return true;
    }
    if (fromTypeId == QMetaType::QVariantHash) {
        i = QAssociativeIterable(reinterpret_cast<QVariantHash *>(from));
        return true;
    }
 
    QIterable<QMetaAssociation> j(QMetaAssociation(), nullptr);
    if (QMetaType::view(
                fromType, from, QMetaType::fromType<QIterable<QMetaAssociation>>(), &j)) {
        i = std::move(j);
        return true;
    }
 
    return false;
}
 
static bool convertMetaObject(QMetaType fromType, const void *from, QMetaType toType, void *to)
{
    // handle QObject conversion
    if ((fromType.flags() & QMetaType::PointerToQObject) && (toType.flags() & QMetaType::PointerToQObject)) {
        QObject *fromObject = *static_cast<QObject * const *>(from);
        // use dynamic metatype of from if possible
        if (fromObject && fromObject->metaObject()->inherits(toType.metaObject()))  {
            *static_cast<QObject **>(to) = toType.metaObject()->cast(fromObject);
            return true;
        } else if (!fromObject && fromType.metaObject()) {
            // if fromObject is null, use static fromType to check if conversion works
            *static_cast<void **>(to) = nullptr;
            return fromType.metaObject()->inherits(toType.metaObject());
        }
    } else if ((fromType.flags() & QMetaType::IsPointer) == (toType.flags() & QMetaType::IsPointer)) {
        // fromType and toType are of same 'pointedness'
        const QMetaObject *f = fromType.metaObject();
        const QMetaObject *t = toType.metaObject();
        if (f && t && f->inherits(t)) {
            toType.destruct(to);
            toType.construct(to, from);
            return true;
        }
    }
    return false;
}
#endif // !QT_BOOTSTRAPPED
 
bool QMetaType::convert(QMetaType fromType, const void *from, QMetaType toType, void *to)
{
    if (!fromType.isValid() || !toType.isValid())
        return false;
 
    if (fromType == toType) {
        // just make a copy
        fromType.destruct(to);
        fromType.construct(to, from);
        return true;
    }
 
    int fromTypeId = fromType.id();
    int toTypeId = toType.id();
 
    if (auto moduleHelper = qModuleHelperForType(qMax(fromTypeId, toTypeId))) {
        if (moduleHelper->convert(from, fromTypeId, to, toTypeId))
            return true;
    }
    const auto f = customTypesConversionRegistry()->function({fromTypeId, toTypeId});
    if (f)
        return (*f)(from, to);
 
    if (fromType.flags() & QMetaType::IsEnumeration)
        return convertFromEnum(fromType, from, toType, to);
    if (toType.flags() & QMetaType::IsEnumeration)
        return convertToEnum(fromType, from, toType, to);
    if (toTypeId == Nullptr) {
        *static_cast<std::nullptr_t *>(to) = nullptr;
        if (fromType.flags() & QMetaType::IsPointer) {
            if (*static_cast<const void * const *>(from) == nullptr)
                return true;
        }
    }
 
#ifndef QT_BOOTSTRAPPED
# ifndef QT_NO_VARIANT
    if (toTypeId == QVariantPair && convertIterableToVariantPair(fromType, from, to))
        return true;
 
    // handle iterables
    if (toTypeId == QVariantList && convertIterableToVariantList(fromType, from, to))
        return true;
 
    if (toTypeId == QVariantMap && convertIterableToVariantMap(fromType, from, to))
        return true;
 
    if (toTypeId == QVariantHash && convertIterableToVariantHash(fromType, from, to))
        return true;
#  endif
 
    if (toTypeId == qMetaTypeId<QSequentialIterable>())
        return convertToSequentialIterable(fromType, from, to);
 
    if (toTypeId == qMetaTypeId<QAssociativeIterable>())
        return convertToAssociativeIterable(fromType, from, to);
 
    return convertMetaObject(fromType, from, toType, to);
#else
    return false;
#endif
}
 
bool QMetaType::view(QMetaType fromType, void *from, QMetaType toType, void *to)
{
    if (!fromType.isValid() || !toType.isValid())
        return false;
 
    int fromTypeId = fromType.id();
    int toTypeId = toType.id();
 
    const auto f = customTypesMutableViewRegistry()->function({fromTypeId, toTypeId});
    if (f)
        return (*f)(from, to);
 
#ifndef QT_BOOTSTRAPPED
    if (toTypeId == qMetaTypeId<QSequentialIterable>())
        return viewAsSequentialIterable(fromType, from, to);
 
    if (toTypeId == qMetaTypeId<QAssociativeIterable>())
        return viewAsAssociativeIterable(fromType, from, to);
 
    return convertMetaObject(fromType, from, toType, to);
#else
    return false;
#endif
}
 
bool QMetaType::canView(QMetaType fromType, QMetaType toType)
{
    int fromTypeId = fromType.id();
    int toTypeId = toType.id();
 
    if (fromTypeId == UnknownType || toTypeId == UnknownType)
        return false;
 
    const auto f = customTypesMutableViewRegistry()->function({fromTypeId, toTypeId});
    if (f)
        return true;
 
#ifndef QT_BOOTSTRAPPED
    if (toTypeId == qMetaTypeId<QSequentialIterable>())
        return canImplicitlyViewAsSequentialIterable(fromType);
 
    if (toTypeId == qMetaTypeId<QAssociativeIterable>())
        return canImplicitlyViewAsAssociativeIterable(fromType);
 
    if (canConvertMetaObject(fromType, toType))
        return true;
#endif
 
    return false;
}
 
bool QMetaType::canConvert(QMetaType fromType, QMetaType toType)
{
    int fromTypeId = fromType.id();
    int toTypeId = toType.id();
 
    if (fromTypeId == UnknownType || toTypeId == UnknownType)
        return false;
 
    if (fromTypeId == toTypeId)
        return true;
 
    if (auto moduleHelper = qModuleHelperForType(qMax(fromTypeId, toTypeId))) {
        if (moduleHelper->convert(nullptr, fromTypeId, nullptr, toTypeId))
            return true;
    }
    const ConverterFunction * const f =
        customTypesConversionRegistry()->function(std::make_pair(fromTypeId, toTypeId));
    if (f)
        return true;
 
#ifndef QT_BOOTSTRAPPED
    if (toTypeId == qMetaTypeId<QSequentialIterable>())
        return canConvertToSequentialIterable(fromType);
 
    if (toTypeId == qMetaTypeId<QAssociativeIterable>())
        return canConvertToAssociativeIterable(fromType);
#endif
#ifndef QT_NO_VARIANT
    if (toTypeId == QVariantList
            && canConvert(fromType, QMetaType::fromType<QSequentialIterable>())) {
        return true;
    }
 
    if ((toTypeId == QVariantHash || toTypeId == QVariantMap)
            && canConvert(fromType, QMetaType::fromType<QAssociativeIterable>())) {
        return true;
    }
 
    if (toTypeId == QVariantPair && hasRegisteredConverterFunction(
                    fromType, QMetaType::fromType<QtMetaTypePrivate::QPairVariantInterfaceImpl>()))
        return true;
#endif
 
    if (fromType.flags() & IsEnumeration) {
        if (toTypeId == QString || toTypeId == QByteArray)
            return true;
        return canConvert(QMetaType(LongLong), toType);
    }
    if (toType.flags() & IsEnumeration) {
        if (fromTypeId == QString || fromTypeId == QByteArray)
            return true;
        return canConvert(fromType, QMetaType(LongLong));
    }
    if (toTypeId == Nullptr && fromType.flags() & IsPointer)
        return true;
#ifndef QT_BOOTSTRAPPED
    if (canConvertMetaObject(fromType, toType))
        return true;
#endif
 
    return false;
}
 
bool QMetaType::hasRegisteredConverterFunction(QMetaType fromType, QMetaType toType)
{
    return customTypesConversionRegistry()->contains({fromType.id(), toType.id()});
}
 
bool QtPrivate::hasRegisteredConverterFunctionToPairVariantInterface(QMetaType m)
{
    const QMetaType to = QMetaType::fromType<QtMetaTypePrivate::QPairVariantInterfaceImpl>();
    return QMetaType::hasRegisteredConverterFunction(m, to);
}
 
bool QtPrivate::hasRegisteredConverterFunctionToIterableMetaSequence(QMetaType m)
{
    const QMetaType to = QMetaType::fromType<QIterable<QMetaSequence>>();
    return QMetaType::hasRegisteredConverterFunction(m, to);
}
 
bool QtPrivate::hasRegisteredConverterFunctionToIterableMetaAssociation(QMetaType m)
{
    const QMetaType to = QMetaType::fromType<QIterable<QMetaAssociation>>();
    return QMetaType::hasRegisteredConverterFunction(m, to);
}
 
bool QMetaType::hasRegisteredMutableViewFunction(QMetaType fromType, QMetaType toType)
{
    return customTypesMutableViewRegistry()->contains({fromType.id(), toType.id()});
}
 
bool QtPrivate::hasRegisteredMutableViewFunctionToIterableMetaSequence(QMetaType m)
{
    const QMetaType to = QMetaType::fromType<QIterable<QMetaSequence>>();
    return QMetaType::hasRegisteredMutableViewFunction(m, to);
}
 
bool QtPrivate::hasRegisteredMutableViewFunctionToIterableMetaAssociation(QMetaType m)
{
    const QMetaType to = QMetaType::fromType<QIterable<QMetaAssociation>>();
    return QMetaType::hasRegisteredMutableViewFunction(m, to);
}
 
/*
    Similar to QMetaType::type(), but only looks in the static set of types.
*/
static inline int qMetaTypeStaticType(const char *typeName, int length)
{
    int i = 0;
    while (types[i].typeName && ((length != types[i].typeNameLength)
                                 || memcmp(typeName, types[i].typeName, length))) {
        ++i;
    }
    return types[i].type;
}
 
/*
    Similar to QMetaType::type(), but only looks in the custom set of
    types, and doesn't lock the mutex.
 
*/
static int qMetaTypeCustomType_unlocked(const char *typeName, int length)
{
    if (customTypeRegistry.exists()) {
        auto reg = &*customTypeRegistry;
#if QT_CONFIG(thread)
        Q_ASSERT(!reg->lock.tryLockForWrite());
#endif
        if (auto ti = reg->aliases.value(QByteArray::fromRawData(typeName, length), nullptr)) {
            return ti->typeId.loadRelaxed();
        }
    }
    return QMetaType::UnknownType;
}
 
void QMetaType::registerNormalizedTypedef(const NS(QByteArray) & normalizedTypeName,
                                          QMetaType metaType)
{
    if (!metaType.isValid())
        return;
    if (auto reg = customTypeRegistry()) {
        QWriteLocker lock(&reg->lock);
        auto &al = reg->aliases[normalizedTypeName];
        if (al)
            return;
        al = metaType.d_ptr;
    }
}
 
 
static const QtPrivate::QMetaTypeInterface *interfaceForTypeNoWarning(int typeId)
{
    const QtPrivate::QMetaTypeInterface *iface = nullptr;
    if (typeId >= QMetaType::User) {
        if (customTypeRegistry.exists())
            iface = customTypeRegistry->getCustomType(typeId);
    } else {
        if (auto moduleHelper = qModuleHelperForType(typeId))
            iface = moduleHelper->interfaceForType(typeId);
    }
    return iface;
}
 
bool QMetaType::isRegistered(int type)
{
    return interfaceForTypeNoWarning(type) != nullptr;
}
 
template <bool tryNormalizedType>
static inline int qMetaTypeTypeImpl(const char *typeName, int length)
{
    if (!length)
        return QMetaType::UnknownType;
    int type = qMetaTypeStaticType(typeName, length);
    if (type == QMetaType::UnknownType) {
        QReadLocker locker(&customTypeRegistry()->lock);
        type = qMetaTypeCustomType_unlocked(typeName, length);
#ifndef QT_NO_QOBJECT
        if ((type == QMetaType::UnknownType) && tryNormalizedType) {
            const NS(QByteArray) normalizedTypeName = QMetaObject::normalizedType(typeName);
            type = qMetaTypeStaticType(normalizedTypeName.constData(),
                                       normalizedTypeName.size());
            if (type == QMetaType::UnknownType) {
                type = qMetaTypeCustomType_unlocked(normalizedTypeName.constData(),
                                                    normalizedTypeName.size());
            }
        }
#endif
    }
    return type;
}
 
Q_CORE_EXPORT int qMetaTypeTypeInternal(const char *typeName)
{
    return qMetaTypeTypeImpl</*tryNormalizedType=*/false>(typeName, int(qstrlen(typeName)));
}
 
#ifndef QT_NO_DATASTREAM
bool QMetaType::save(QDataStream &stream, const void *data) const
{
    if (!data || !isValid())
        return false;
 
    // keep compatibility for long/ulong
    if (id() == QMetaType::Long) {
        stream << qlonglong(*(long *)data);
        return true;
    } else if (id() == QMetaType::ULong) {
        stream << qlonglong(*(unsigned long *)data);
        return true;
    }
 
    if (!d_ptr->dataStreamOut)
        return false;
 
    d_ptr->dataStreamOut(d_ptr, stream, data);
    return true;
}
 
bool QMetaType::load(QDataStream &stream, void *data) const
{
    if (!data || !isValid())
        return false;
 
    // keep compatibility for long/ulong
    if (id() == QMetaType::Long) {
        qlonglong ll;
        stream >> ll;
        *(long *)data = long(ll);
        return true;
    } else if (id() == QMetaType::ULong) {
        qulonglong ull;
        stream >> ull;
        *(unsigned long *)data = (unsigned long)(ull);
        return true;
    }
    if (!d_ptr->dataStreamIn)
        return false;
 
    d_ptr->dataStreamIn(d_ptr, stream, data);
    return true;
}
 
bool QMetaType::hasRegisteredDataStreamOperators() const
{
    int type = id();
    if (type == QMetaType::Long || type == QMetaType::ULong)
        return true;
    return d_ptr && d_ptr->dataStreamIn != nullptr && d_ptr->dataStreamOut != nullptr;
}
 
QMetaType QMetaType::underlyingType() const
{
    if (!d_ptr || !(flags() & IsEnumeration))
        return {};
    /* QFlags has enumeration set so that's handled here (qint32
       case), as QFlags uses int as the underlying type
       Note that we do some approximation here, as we cannot
       differentiate between different underlying types of the
       same size and signedness (consider char <-> (un)signed char,
       int <-> long <-> long long).
 
       ### TODO PENDING: QTBUG-111926 - QFlags supporting >32 bit int
    */
    if (flags() & IsUnsignedEnumeration) {
        switch (sizeOf()) {
        case 1:
            return QMetaType::fromType<quint8>();
        case 2:
            return QMetaType::fromType<quint16>();
        case 4:
            return QMetaType::fromType<quint32>();
        case 8:
            return QMetaType::fromType<quint64>();
        default:
            break;
        }
    } else {
        switch (sizeOf()) {
        case 1:
            return QMetaType::fromType<qint8>();
        case 2:
            return QMetaType::fromType<qint16>();
        case 4:
            return QMetaType::fromType<qint32>();
        case 8:
            return QMetaType::fromType<qint64>();
        default:
            break;
        }
    }
    // int128 can be handled above once we have qint128
    return QMetaType();
}
 
#endif // QT_NO_DATASTREAM
 
QMetaType QMetaType::fromName(QByteArrayView typeName)
{
    return QMetaType(qMetaTypeTypeImpl</*tryNormalizedType=*/true>(typeName.data(), typeName.size()));
}
 
static const QtPrivate::QMetaTypeInterface *interfaceForType(int typeId)
{
    const QtPrivate::QMetaTypeInterface *iface = interfaceForTypeNoWarning(typeId);
    if (!iface && typeId != QMetaType::UnknownType)
        qWarning("Trying to construct an instance of an invalid type, type id: %i", typeId);
 
    return iface;
}
 
QMetaType::QMetaType(int typeId) : QMetaType(interfaceForType(typeId)) {}
 
 
namespace QtPrivate {
#if !defined(QT_BOOTSTRAPPED) && !defined(Q_CC_MSVC) && !defined(Q_OS_INTEGRITY)
 
// Explicit instantiation definition
#define QT_METATYPE_DECLARE_TEMPLATE_ITER(TypeName, Id, Name)   \
    template class QMetaTypeForType<Name>;                      \
    template struct QMetaTypeInterfaceWrapper<Name>;
QT_FOR_EACH_STATIC_PRIMITIVE_NON_VOID_TYPE(QT_METATYPE_DECLARE_TEMPLATE_ITER)
QT_FOR_EACH_STATIC_PRIMITIVE_POINTER(QT_METATYPE_DECLARE_TEMPLATE_ITER)
QT_FOR_EACH_STATIC_CORE_CLASS(QT_METATYPE_DECLARE_TEMPLATE_ITER)
QT_FOR_EACH_STATIC_CORE_POINTER(QT_METATYPE_DECLARE_TEMPLATE_ITER)
QT_FOR_EACH_STATIC_CORE_TEMPLATE(QT_METATYPE_DECLARE_TEMPLATE_ITER)
 
#undef QT_METATYPE_DECLARE_TEMPLATE_ITER
#endif
}
 
QT_END_NAMESPACE