diff options
Diffstat (limited to 'src/corelib/kernel/qmetatype.cpp')
| -rw-r--r-- | src/corelib/kernel/qmetatype.cpp | 340 |
1 files changed, 230 insertions, 110 deletions
diff --git a/src/corelib/kernel/qmetatype.cpp b/src/corelib/kernel/qmetatype.cpp index 3e38f68137..387c0f49ab 100644 --- a/src/corelib/kernel/qmetatype.cpp +++ b/src/corelib/kernel/qmetatype.cpp @@ -20,14 +20,14 @@ #include "qeasingcurve.h" #endif #include "quuid.h" -#include "qvariant.h" -#include "qdatastream.h" #if QT_CONFIG(regularexpression) # include "qregularexpression.h" #endif #ifndef QT_BOOTSTRAPPED +# include "qdatastream.h" + # include "qbitarray.h" # include "qurl.h" # include "qvariant.h" @@ -42,6 +42,7 @@ # include "qmetaobject.h" # include "qsequentialiterable.h" # include "qassociativeiterable.h" +# include "qobject.h" #endif #if QT_CONFIG(itemmodel) @@ -55,7 +56,6 @@ # include "qline.h" #endif -#include <bitset> #include <new> #include <cstring> @@ -83,6 +83,20 @@ struct QMetaTypeDeleter 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; @@ -136,13 +150,7 @@ struct QMetaTypeCustomRegistry auto &ti = registry[idx]; // We must unregister all names. - auto it = aliases.begin(); - while (it != aliases.end()) { - if (it.value() == ti) - it = aliases.erase(it); - else - ++it; - } + aliases.removeIf([ti] (const auto &kv) { return kv.value() == ti; }); ti = nullptr; @@ -254,7 +262,7 @@ const char *QtMetaTypePrivate::typedefNameForType(const QtPrivate::QMetaTypeInte \li Pointers to classes derived from QObject \li QList<T>, QQueue<T>, QStack<T> or QSet<T> where T is a registered meta type - \li QHash<T1, T2>, QMap<T1, T2> or QPair<T1, T2> where T1 and T2 are + \li QHash<T1, T2>, QMap<T1, T2> or std::pair<T1, T2> where T1 and T2 are registered meta types \li QPointer<T>, QSharedPointer<T>, QWeakPointer<T>, where T is a class that derives from QObject \li Enumerations registered with Q_ENUM or Q_FLAG @@ -352,8 +360,12 @@ const char *QtMetaTypePrivate::typedefNameForType(const QtPrivate::QMetaTypeInte \value SChar \c{signed char} \value UChar \c{unsigned char} \value Float \c float + \value Float16 qfloat16 + \omitvalue Float128 + \omitvalue BFloat16 + \omitvalue Int128 + \omitvalue UInt128 \value QObjectStar QObject * - \value QVariant QVariant \value QCursor QCursor \value QDate QDate @@ -371,6 +383,7 @@ const char *QtMetaTypePrivate::typedefNameForType(const QtPrivate::QMetaTypeInte \value QStringList QStringList \value QVariantMap QVariantMap \value QVariantHash QVariantHash + \value QVariantPair QVariantPair \value QIcon QIcon \value QPen QPen \value QLineF QLineF @@ -411,13 +424,13 @@ const char *QtMetaTypePrivate::typedefNameForType(const QtPrivate::QMetaTypeInte \value QPersistentModelIndex QPersistentModelIndex (introduced in Qt 5.5) \value QUuid QUuid \value QByteArrayList QByteArrayList + \value QVariant QVariant \value User Base value for user types \value UnknownType This is an invalid type id. It is returned from QMetaType for types that are not registered - \omitvalue LastCoreType - \omitvalue LastGuiType - Additional types can be registered using Q_DECLARE_METATYPE(). + Additional types can be registered using qRegisterMetaType() or by calling + registerType(). \sa type(), typeName() */ @@ -427,23 +440,23 @@ const char *QtMetaTypePrivate::typedefNameForType(const QtPrivate::QMetaTypeInte The enum describes attributes of a type supported by QMetaType. - \value NeedsConstruction This type has a non-trivial default constructor. If the flag is not set, instances can be safely initialized with memset to 0. - \value NeedsCopyConstruction (since 6.5) This type has a non-trivial copy construtcor. If the flag is not set, instances can be copied with memcpy. + \value NeedsConstruction This type has a default constructor. If the flag is not set, instances can be safely initialized with memset to 0. + \value NeedsCopyConstruction (since 6.5) This type has a non-trivial copy constructor. If the flag is not set, instances can be copied with memcpy. \value NeedsMoveConstruction (since 6.5) This type has a non-trivial move constructor. If the flag is not set, instances can be moved with memcpy. - \value NeedsDestruction This type has a non-trivial destructor. If the flag is not set calls to the destructor are not necessary before discarding objects. + \value NeedsDestruction This type has a non-trivial destructor. If the flag is not set, calls to the destructor are not necessary before discarding objects. \value RelocatableType An instance of a type having this attribute can be safely moved to a different memory location using memcpy. \omitvalue MovableType \omitvalue SharedPointerToQObject \value IsEnumeration This type is an enumeration. \value IsUnsignedEnumeration If the type is an Enumeration, its underlying type is unsigned. - \value PointerToQObject This type is a pointer to a derived of QObject. + \value PointerToQObject This type is a pointer to a class derived from QObject. \value IsPointer This type is a pointer to another type. \omitvalue WeakPointerToQObject \omitvalue TrackingPointerToQObject - \omitvalue IsGadget \omit This type is a Q_GADGET and it's corresponding QMetaObject can be accessed with QMetaType::metaObject Since 5.5. \endomit + \omitvalue IsGadget \omit (since Qt 5.5) This type is a Q_GADGET and its corresponding QMetaObject can be accessed with QMetaType::metaObject. \endomit \omitvalue PointerToGadget \omitvalue IsQmlList - \value IsConst Indicates that values of this types are immutable; for instance because they are pointers to const objects. + \value IsConst Indicates that values of this type are immutable; for instance, because they are pointers to const objects. \note Before Qt 6.5, both the NeedsConstruction and NeedsDestruction flags were incorrectly set if the either copy construtor or destructor were @@ -465,17 +478,19 @@ const char *QtMetaTypePrivate::typedefNameForType(const QtPrivate::QMetaTypeInte The class is used as a helper to marshall types in QVariant and in queued signals and slots connections. It associates a type name to a type so that it can be created and destructed - dynamically at run-time. Declare new types with Q_DECLARE_METATYPE() - to make them available to QVariant and other template-based functions. - Call qRegisterMetaType() to make types available to non-template based - functions, such as the queued signal and slot connections. + dynamically at run-time. - Any class or struct that has a public default - constructor, a public copy constructor, and a public destructor - can be registered. + Type names can be registered with QMetaType by using either + qRegisterMetaType() or registerType(). Registration is not required for + most operations; it's only required for operations that attempt to resolve + a type name in string form back to a QMetaType object or the type's ID. + Those include some old-style signal-slot connections using + QObject::connect(), reading user-types from \l QDataStream to \l QVariant, + or binding to other languages and IPC mechanisms, like QML, D-Bus, + JavaScript, etc. - The following code allocates and destructs an instance of - \c{MyClass}: + The following code allocates and destructs an instance of \c{MyClass} by + its name, which requires that \c{MyClass} have been previously registered: \snippet code/src_corelib_kernel_qmetatype.cpp 3 @@ -592,19 +607,21 @@ int QMetaType::registerHelper(const QtPrivate::QMetaTypeInterface *iface) \fn constexpr const QMetaObject *QMetaType::metaObject() const \since 5.5 - return a QMetaObject relative to this type. + Returns a QMetaObject relative to this type. If the type is a pointer type to a subclass of QObject, flags() contains - QMetaType::PointerToQObject and this function returns the corresponding QMetaObject. This can - be used to in combinaison with QMetaObject::construct to create QObject of this type. + QMetaType::PointerToQObject and this function returns the corresponding QMetaObject. + This can be used in combination with QMetaObject::newInstance() to create QObjects of this type. - If the type is a Q_GADGET, flags() contains QMetaType::IsGadget, and this function returns its - QMetaObject. This can be used to retrieve QMetaMethod and QMetaProperty and use them on a - pointer of this type. (given by QVariant::data for example) + If the type is a Q_GADGET, flags() contains QMetaType::IsGadget. + If the type is a pointer to a Q_GADGET, flags() contains QMetaType::PointerToGadget. + In both cases, this function returns its QMetaObject. + This can be used to retrieve QMetaMethod and QMetaProperty and use them on a + pointer of this type for example, as given by QVariant::data(). - If the type is an enumeration, flags() contains QMetaType::IsEnumeration, and this function - returns the QMetaObject of the enclosing object if the enum was registered as a Q_ENUM or - \nullptr otherwise + If the type is an enumeration, flags() contains QMetaType::IsEnumeration. + In this case, this function returns the QMetaObject of the enclosing + object if the enum was registered as a Q_ENUM or \nullptr otherwise. \sa QMetaType::flags() */ @@ -883,13 +900,22 @@ bool QMetaType::isOrdered() const */ void QMetaType::unregisterMetaType(QMetaType type) { - if (type.d_ptr && type.d_ptr->typeId.loadRelaxed() >= QMetaType::User) { - // this is a custom meta type (not read-only) - auto d = const_cast<QtPrivate::QMetaTypeInterface *>(type.d_ptr); - if (auto reg = customTypeRegistry()) - reg->unregisterDynamicType(d->typeId.loadRelaxed()); - d->typeId.storeRelease(0); + 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); } /*! @@ -915,6 +941,12 @@ void QMetaType::unregisterMetaType(QMetaType type) than the QMetaType \a b, otherwise returns \c false. */ +/*! \internal */ +bool QMetaTypeModuleHelper::convert(const void *, int, void *, int) const +{ + return false; +} + #define QT_ADD_STATIC_METATYPE(MetaTypeName, MetaTypeId, RealName) \ { #RealName, sizeof(#RealName) - 1, MetaTypeId }, @@ -930,7 +962,8 @@ static const struct { const char * typeName; int typeNameLength; int type; } typ {nullptr, 0, QMetaType::UnknownType} }; -static const struct : QMetaTypeModuleHelper +// 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 *>> @@ -977,6 +1010,8 @@ static const struct : QMetaTypeModuleHelper 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;) @@ -1131,6 +1166,9 @@ static const struct : QMetaTypeModuleHelper 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); @@ -1168,6 +1206,14 @@ static const struct : QMetaTypeModuleHelper 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;); @@ -1175,7 +1221,7 @@ static const struct : QMetaTypeModuleHelper #endif QMETATYPE_CONVERTER(QString, QByteArray, result = QString::fromUtf8(source); return true;); QMETATYPE_CONVERTER(QString, QStringList, - return (source.count() == 1) ? (result = source.at(0), true) : false; + return (source.size() == 1) ? (result = source.at(0), true) : false; ); #ifndef QT_BOOTSTRAPPED QMETATYPE_CONVERTER(QString, QUrl, result = source.toString(); return true;); @@ -1230,34 +1276,36 @@ static const struct : QMetaTypeModuleHelper QMETATYPE_CONVERTER_ASSIGN(QRectF, QRect); QMETATYPE_CONVERTER(QPoint, QPointF, result = source.toPoint(); return true;); QMETATYPE_CONVERTER_ASSIGN(QPointF, QPoint); - #endif +#endif + QMETATYPE_CONVERTER(QStringList, QString, result = QStringList() << source; return true;); + +#ifndef QT_NO_VARIANT QMETATYPE_CONVERTER(QByteArrayList, QVariantList, result.reserve(source.size()); - for (auto v: source) + for (const auto &v: source) result.append(v.toByteArray()); return true; ); QMETATYPE_CONVERTER(QVariantList, QByteArrayList, result.reserve(source.size()); - for (auto v: source) + for (const auto &v: source) result.append(QVariant(v)); return true; ); QMETATYPE_CONVERTER(QStringList, QVariantList, result.reserve(source.size()); - for (auto v: source) + for (const auto &v: source) result.append(v.toString()); return true; ); QMETATYPE_CONVERTER(QVariantList, QStringList, result.reserve(source.size()); - for (auto v: source) + for (const auto &v: source) result.append(QVariant(v)); return true; ); - QMETATYPE_CONVERTER(QStringList, QString, result = QStringList() << source; return true;); QMETATYPE_CONVERTER(QVariantHash, QVariantMap, for (auto it = source.begin(); it != source.end(); ++it) @@ -1269,7 +1317,7 @@ static const struct : QMetaTypeModuleHelper result.insert(it.key(), it.value()); return true; ); - +#endif // !QT_NO_VARIANT #ifndef QT_BOOTSTRAPPED QMETATYPE_CONVERTER_ASSIGN(QCborValue, QString); QMETATYPE_CONVERTER(QString, QCborValue, @@ -1669,17 +1717,17 @@ private: QHash<Key, T> map; }; -typedef QMetaTypeFunctionRegistry<QMetaType::ConverterFunction,QPair<int,int> > -QMetaTypeConverterRegistry; +using QMetaTypeConverterRegistry + = QMetaTypeFunctionRegistry<QMetaType::ConverterFunction, std::pair<int,int>>; Q_GLOBAL_STATIC(QMetaTypeConverterRegistry, customTypesConversionRegistry) using QMetaTypeMutableViewRegistry - = QMetaTypeFunctionRegistry<QMetaType::MutableViewFunction, QPair<int,int>>; + = QMetaTypeFunctionRegistry<QMetaType::MutableViewFunction, std::pair<int,int>>; Q_GLOBAL_STATIC(QMetaTypeMutableViewRegistry, customTypesMutableViewRegistry) /*! - \fn bool QMetaType::registerConverter() + \fn template<typename From, typename To> bool QMetaType::registerConverter() \since 5.2 Registers the possibility of an implicit conversion from type From to type To in the meta type system. Returns \c true if the registration succeeded, otherwise false. @@ -1717,7 +1765,8 @@ Q_GLOBAL_STATIC(QMetaTypeMutableViewRegistry, customTypesMutableViewRegistry) to type To in the meta type system. Returns \c true if the registration succeeded, otherwise false. \a function must take an instance of type \c From and return an instance of \c To. It can be a function - pointer, a lambda or a functor object. + pointer, a lambda or a functor object. Since Qt 6.5, the \a function can also return an instance of + \c std::optional<To> to be able to indicate failed conversions. \snippet qmetatype/registerConverters.cpp unaryfunc */ @@ -1730,7 +1779,7 @@ Q_GLOBAL_STATIC(QMetaTypeMutableViewRegistry, customTypesMutableViewRegistry) */ bool QMetaType::registerConverterFunction(const ConverterFunction &f, QMetaType from, QMetaType to) { - if (!customTypesConversionRegistry()->insertIfNotContains(qMakePair(from.id(), to.id()), f)) { + 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; @@ -1763,7 +1812,7 @@ bool QMetaType::registerConverterFunction(const ConverterFunction &f, QMetaType */ bool QMetaType::registerMutableViewFunction(const MutableViewFunction &f, QMetaType from, QMetaType to) { - if (!customTypesMutableViewRegistry()->insertIfNotContains(qMakePair(from.id(), to.id()), f)) { + 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; @@ -1831,7 +1880,7 @@ bool QMetaType::debugStream(QDebug& dbg, const void *rhs) */ /*! - \fn bool QMetaType::hasRegisteredDebugStreamOperator() + \fn template<typename T> bool QMetaType::hasRegisteredDebugStreamOperator() \deprecated \since 5.2 @@ -1868,10 +1917,16 @@ static QMetaEnum metaEnumFromType(QMetaType t) { if (t.flags() & QMetaType::IsEnumeration) { if (const QMetaObject *metaObject = t.metaObject()) { - const QByteArray enumName = t.name(); - const char *lastColon = std::strrchr(enumName, ':'); - return metaObject->enumerator(metaObject->indexOfEnumerator( - lastColon ? lastColon + 1 : enumName.constData())); + 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(); @@ -1930,18 +1985,27 @@ static bool convertFromEnum(QMetaType fromType, const void *from, QMetaType toTy if (toType.id() != QMetaType::QString && toType.id() != QMetaType::QByteArray) return QMetaType::convert(QMetaType::fromType<qlonglong>(), &ll, toType, to); } - Q_ASSERT(toType.id() == QMetaType::QString || toType.id() == QMetaType::QByteArray); #ifndef QT_NO_QOBJECT QMetaEnum en = metaEnumFromType(fromType); if (en.isValid()) { - const char *key = en.valueToKey(ll); - if (toType.id() == QMetaType::QString) - *static_cast<QString *>(to) = QString::fromUtf8(key); - else - *static_cast<QByteArray *>(to) = key; + 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; } @@ -1953,12 +2017,12 @@ static bool convertToEnum(QMetaType fromType, const void *from, QMetaType toType #ifndef QT_NO_QOBJECT if (fromTypeId == QMetaType::QString || fromTypeId == QMetaType::QByteArray) { QMetaEnum en = metaEnumFromType(toType); - if (!en.isValid()) - return false; - QByteArray keys = (fromTypeId == QMetaType::QString) - ? static_cast<const QString *>(from)->toUtf8() - : *static_cast<const QByteArray *>(from); - value = en.keysToValue(keys.constData(), &ok); + 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) { @@ -1987,8 +2051,7 @@ static bool convertToEnum(QMetaType fromType, const void *from, QMetaType toType *static_cast<qint64 *>(to) = value; return true; default: - Q_UNREACHABLE(); - return false; + Q_UNREACHABLE_RETURN(false); } } @@ -2036,13 +2099,12 @@ static bool convertIterableToVariantHash(QMetaType fromType, const void *from, v h.insert(it.key().toString(), it.value()); return true; } -#endif static bool convertIterableToVariantPair(QMetaType fromType, const void *from, void *to) { - const QMetaType::ConverterFunction * const f = - customTypesConversionRegistry()->function(qMakePair(fromType.id(), - qMetaTypeId<QtMetaTypePrivate::QPairVariantInterfaceImpl>())); + const int targetId = qMetaTypeId<QtMetaTypePrivate::QPairVariantInterfaceImpl>(); + const auto f = customTypesConversionRegistry()->function({fromType.id(), targetId}); + if (!f) return false; @@ -2068,7 +2130,6 @@ static bool convertIterableToVariantPair(QMetaType fromType, const void *from, v return true; } -#ifndef QT_BOOTSTRAPPED static bool convertToSequentialIterable(QMetaType fromType, const void *from, void *to) { using namespace QtMetaTypePrivate; @@ -2194,6 +2255,9 @@ static bool convertToAssociativeIterable(QMetaType fromType, const void *from, v 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) { @@ -2264,7 +2328,8 @@ static bool convertMetaObject(QMetaType fromType, const void *from, QMetaType to *static_cast<void **>(to) = nullptr; return fromType.metaObject()->inherits(toType.metaObject()); } - } else { + } 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)) { @@ -2275,7 +2340,7 @@ static bool convertMetaObject(QMetaType fromType, const void *from, QMetaType to } return false; } -#endif +#endif // !QT_BOOTSTRAPPED /*! \fn bool QMetaType::convert(const void *from, int fromTypeId, void *to, int toTypeId) @@ -2316,8 +2381,7 @@ bool QMetaType::convert(QMetaType fromType, const void *from, QMetaType toType, if (moduleHelper->convert(from, fromTypeId, to, toTypeId)) return true; } - const QMetaType::ConverterFunction * const f = - customTypesConversionRegistry()->function(qMakePair(fromTypeId, toTypeId)); + const auto f = customTypesConversionRegistry()->function({fromTypeId, toTypeId}); if (f) return (*f)(from, to); @@ -2333,10 +2397,11 @@ bool QMetaType::convert(QMetaType fromType, const void *from, QMetaType toType, } } +#ifndef QT_BOOTSTRAPPED +# ifndef QT_NO_VARIANT if (toTypeId == QVariantPair && convertIterableToVariantPair(fromType, from, to)) return true; -#ifndef QT_BOOTSTRAPPED // handle iterables if (toTypeId == QVariantList && convertIterableToVariantList(fromType, from, to)) return true; @@ -2346,6 +2411,7 @@ bool QMetaType::convert(QMetaType fromType, const void *from, QMetaType toType, if (toTypeId == QVariantHash && convertIterableToVariantHash(fromType, from, to)) return true; +# endif if (toTypeId == qMetaTypeId<QSequentialIterable>()) return convertToSequentialIterable(fromType, from, to); @@ -2372,8 +2438,7 @@ bool QMetaType::view(QMetaType fromType, void *from, QMetaType toType, void *to) int fromTypeId = fromType.id(); int toTypeId = toType.id(); - const QMetaType::MutableViewFunction * const f = - customTypesMutableViewRegistry()->function(qMakePair(fromTypeId, toTypeId)); + const auto f = customTypesMutableViewRegistry()->function({fromTypeId, toTypeId}); if (f) return (*f)(from, to); @@ -2415,8 +2480,7 @@ bool QMetaType::canView(QMetaType fromType, QMetaType toType) if (fromTypeId == UnknownType || toTypeId == UnknownType) return false; - const MutableViewFunction * const f = - customTypesMutableViewRegistry()->function(qMakePair(fromTypeId, toTypeId)); + const auto f = customTypesMutableViewRegistry()->function({fromTypeId, toTypeId}); if (f) return true; @@ -2521,7 +2585,7 @@ bool QMetaType::canConvert(QMetaType fromType, QMetaType toType) return true; } const ConverterFunction * const f = - customTypesConversionRegistry()->function(qMakePair(fromTypeId, toTypeId)); + customTypesConversionRegistry()->function(std::make_pair(fromTypeId, toTypeId)); if (f) return true; @@ -2531,7 +2595,8 @@ bool QMetaType::canConvert(QMetaType fromType, QMetaType toType) if (toTypeId == qMetaTypeId<QAssociativeIterable>()) return canConvertToAssociativeIterable(fromType); - +#endif +#ifndef QT_NO_VARIANT if (toTypeId == QVariantList && canConvert(fromType, QMetaType::fromType<QSequentialIterable>())) { return true; @@ -2541,11 +2606,11 @@ bool QMetaType::canConvert(QMetaType fromType, QMetaType toType) && canConvert(fromType, QMetaType::fromType<QAssociativeIterable>())) { return true; } -#endif if (toTypeId == QVariantPair && hasRegisteredConverterFunction( fromType, QMetaType::fromType<QtMetaTypePrivate::QPairVariantInterfaceImpl>())) return true; +#endif if (fromType.flags() & IsEnumeration) { if (toTypeId == QString || toTypeId == QByteArray) @@ -2577,7 +2642,7 @@ bool QMetaType::canConvert(QMetaType fromType, QMetaType toType) */ /*! - \fn bool QMetaType::hasRegisteredConverterFunction() + \fn template<typename From, typename To> bool QMetaType::hasRegisteredConverterFunction() Returns \c true, if the meta type system has a registered conversion from type From to type To. \since 5.2 \overload @@ -2590,11 +2655,11 @@ bool QMetaType::canConvert(QMetaType fromType, QMetaType toType) */ bool QMetaType::hasRegisteredConverterFunction(QMetaType fromType, QMetaType toType) { - return customTypesConversionRegistry()->contains(qMakePair(fromType.id(), toType.id())); + return customTypesConversionRegistry()->contains({fromType.id(), toType.id()}); } /*! - \fn bool QMetaType::hasRegisteredMutableViewFunction() + \fn template<typename From, typename To> bool QMetaType::hasRegisteredMutableViewFunction() Returns \c true, if the meta type system has a registered mutable view on type From of type To. \since 6.0 \overload @@ -2607,7 +2672,7 @@ bool QMetaType::hasRegisteredConverterFunction(QMetaType fromType, QMetaType toT */ bool QMetaType::hasRegisteredMutableViewFunction(QMetaType fromType, QMetaType toType) { - return customTypesMutableViewRegistry()->contains(qMakePair(fromType.id(), toType.id())); + return customTypesMutableViewRegistry()->contains({fromType.id(), toType.id()}); } /*! @@ -2775,9 +2840,6 @@ Q_CORE_EXPORT int qMetaTypeTypeInternal(const char *typeName) Returns \c true if the object is saved successfully; otherwise returns \c false. - The type must have been registered with Q_DECLARE_METATYPE() - beforehand. - Normally, you should not need to call this function directly. Instead, use QVariant's \c operator<<(), which relies on save() to stream custom types. @@ -2816,9 +2878,6 @@ bool QMetaType::save(QDataStream &stream, const void *data) const Returns \c true if the object is loaded successfully; otherwise returns \c false. - The type must have been registered with Q_DECLARE_METATYPE() - beforehand. - Normally, you should not need to call this function directly. Instead, use QVariant's \c operator>>(), which relies on load() to stream custom types. @@ -2864,6 +2923,59 @@ bool QMetaType::hasRegisteredDataStreamOperators() const } /*! + \since 6.6 + + If this metatype represents an enumeration, this method returns a + metatype of a numeric class of the same signedness and size as the + enums underlying type. + If it represents a QFlags type, it returns QMetaType::Int. + In all other cases an invalid QMetaType is returned. + */ +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(); +} + +/*! \fn bool QMetaType::load(QDataStream &stream, int type, void *data) \overload \deprecated @@ -2975,7 +3087,7 @@ QMetaType QMetaType::fromName(QByteArrayView typeName) */ /*! - \fn int qRegisterMetaType(const char *typeName) + \fn template <typename T> int qRegisterMetaType(const char *typeName) \relates QMetaType \obsolete \threadsafe @@ -3009,7 +3121,7 @@ QMetaType QMetaType::fromName(QByteArrayView typeName) */ /*! - \fn int qRegisterMetaType() + \fn template <typename T> int qRegisterMetaType() \relates QMetaType \threadsafe \since 4.2 @@ -3065,7 +3177,7 @@ QMetaType QMetaType::fromName(QByteArrayView typeName) */ /*! - \fn int qMetaTypeId() + \fn template <typename T> int qMetaTypeId() \relates QMetaType \threadsafe \since 4.1 @@ -3096,6 +3208,13 @@ static const QtPrivate::QMetaTypeInterface *interfaceForType(int typeId) } /*! + \fn QMetaType::QMetaType() + \since 6.0 + + Constructs a default, invalid, QMetaType object. +*/ + +/*! \fn QMetaType::QMetaType(int typeId) \since 5.0 @@ -3123,6 +3242,7 @@ 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 } |