動的なメタオブジェクト（パート1、研究）

 class Q_CORE_EXPORT QObjectData { public: virtual ~QObjectData() = 0; QObject *q_ptr; QObject *parent; QObjectList children; uint isWidget : 1; uint blockSig : 1; uint wasDeleted : 1; uint isDeletingChildren : 1; uint sendChildEvents : 1; uint receiveChildEvents : 1; uint isWindow : 1; //for QWindow uint unused : 25; int postedEvents; QDynamicMetaObjectData *metaObject; QMetaObject *dynamicMetaObject() const; }; class Q_CORE_EXPORT QObject { Q_OBJECT Q_PROPERTY(QString objectName READ objectName WRITE setObjectName NOTIFY objectNameChanged) Q_DECLARE_PRIVATE(QObject) ///  protected: QScopedPointer<QObjectData> d_ptr; static const QMetaObject staticQtMetaObject; ///   } 

 ///  QT_BEGIN_MOC_NAMESPACE struct qt_meta_stringdata_A_t { QByteArrayData data[4]; char stringdata[15]; }; #define QT_MOC_LITERAL(idx, ofs, len) \ Q_STATIC_BYTE_ARRAY_DATA_HEADER_INITIALIZER_WITH_OFFSET(len, \ qptrdiff(offsetof(qt_meta_stringdata_A_t, stringdata) + ofs \ - idx * sizeof(QByteArrayData)) \ ) static const qt_meta_stringdata_A_t qt_meta_stringdata_A = { { QT_MOC_LITERAL(0, 0, 1), // "A" QT_MOC_LITERAL(1, 2, 6), // "signal" QT_MOC_LITERAL(2, 9, 0), // "" QT_MOC_LITERAL(3, 10, 4) // "slot" }, "A\0signal\0\0slot" }; #undef QT_MOC_LITERAL static const uint qt_meta_data_A[] = { // content: 7, // revision 0, // classname 0, 0, // classinfo 2, 14, // methods 0, 0, // properties 0, 0, // enums/sets 0, 0, // constructors 0, // flags 1, // signalCount // signals: name, argc, parameters, tag, flags 1, 0, 24, 2, 0x06 /* Public */, // slots: name, argc, parameters, tag, flags 3, 0, 25, 2, 0x0a /* Public */, // signals: parameters QMetaType::Void, // slots: parameters QMetaType::Void, 0 // eod }; void A::qt_static_metacall(QObject *_o, QMetaObject::Call _c, int _id, void **_a) { if (_c == QMetaObject::InvokeMetaMethod) { A *_t = static_cast<A *>(_o); switch (_id) { case 0: _t->signal(); break; case 1: _t->slot(); break; default: ; } } else if (_c == QMetaObject::IndexOfMethod) { ///        } Q_UNUSED(_a); } ///   !    ! const QMetaObject A::staticMetaObject = { { &QObject::staticMetaObject, qt_meta_stringdata_A.data, qt_meta_data_A, qt_static_metacall, Q_NULLPTR, Q_NULLPTR} }; const QMetaObject *A::metaObject() const { return QObject::d_ptr->metaObject ? QObject::d_ptr->dynamicMetaObject() : &staticMetaObject; } int A::qt_metacall(QMetaObject::Call _c, int _id, void **_a) { _id = QObject::qt_metacall(_c, _id, _a); if (_id < 0) return _id; if (_c == QMetaObject::InvokeMetaMethod) { if (_id < 2) qt_static_metacall(this, _c, _id, _a); _id -= 2; } else if (_c == QMetaObject::RegisterMethodArgumentMetaType) { if (_id < 2) *reinterpret_cast<int*>(_a[0]) = -1; _id -= 2; } return _id; } // SIGNAL 0 void A::signal() { QMetaObject::activate(this, &staticMetaObject, 0, Q_NULLPTR); } QT_END_MOC_NAMESPACE 

 ///   struct QAbstractDynamicMetaObject; struct Q_CORE_EXPORT QDynamicMetaObjectData { virtual ~QDynamicMetaObjectData() {} virtual void objectDestroyed(QObject *) { delete this; } virtual QAbstractDynamicMetaObject *toDynamicMetaObject(QObject *) = 0; ///    metaObject virtual int metaCall(QObject *, QMetaObject::Call, int _id, void **) = 0;///    //. }; ///     ,   . struct Q_CORE_EXPORT QAbstractDynamicMetaObject : public QDynamicMetaObjectData, public QMetaObject { virtual QAbstractDynamicMetaObject *toDynamicMetaObject(QObject *) { return this; } virtual int createProperty(const char *, const char *) { return -1; }///    .    virtual int metaCall(QObject *, QMetaObject::Call c, int _id, void **a) { return metaCall(c, _id, a); } virtual int metaCall(QMetaObject::Call, int _id, void **) { return _id; } // Compat overload }; ///     

 struct Q_CORE_EXPORT QMetaObject { ///  struct { // private data const QMetaObject *superdata;///     const QByteArrayData *stringdata;///   (  ,  ,   ) const uint *data;///    (  ,  ,   ) typedef void (*StaticMetacallFunction)(QObject *, QMetaObject::Call, int, void **); StaticMetacallFunction static_metacall;///  ,     . const QMetaObject * const *relatedMetaObjects;///,    void *extradata; //reserved for future use } d; } 

 struct qt_meta_stringdata_A_t { QByteArrayData data[4]; char stringdata[15]; }; #define QT_MOC_LITERAL(idx, ofs, len) \ Q_STATIC_BYTE_ARRAY_DATA_HEADER_INITIALIZER_WITH_OFFSET(len, \ qptrdiff(offsetof(qt_meta_stringdata_A_t, stringdata) + ofs \ - idx * sizeof(QByteArrayData)) \ ) static const qt_meta_stringdata_A_t qt_meta_stringdata_A = { { QT_MOC_LITERAL(0, 0, 1), // "A" QT_MOC_LITERAL(1, 2, 6), // "signal" QT_MOC_LITERAL(2, 9, 0), // "" QT_MOC_LITERAL(3, 10, 4) // "slot" }, "A\0signal\0\0slot" }; #undef QT_MOC_LITERAL 

 static const uint qt_meta_data_A[] = { ///1  // content: 7, // revision 0, // classname 0, 0, // classinfo 2, 14, // methods 0, 0, // properties 0, 0, // enums/sets 0, 0, // constructors 0, // flags 1, // signalCount ///2  // signals: name, argc, parameters, tag, flags 1, 0, 24, 2, 0x06 /* Public */, // slots: name, argc, parameters, tag, flags 3, 0, 25, 2, 0x0a /* Public */, ///3  // signals: parameters QMetaType::Void, // slots: parameters QMetaType::Void, 0 // eod }; 

 struct QMetaObjectPrivate { enum { OutputRevision = 7 }; // Used by moc, qmetaobjectbuilder and qdbus int revision; int className; int classInfoCount, classInfoData; int methodCount, methodData; int propertyCount, propertyData; int enumeratorCount, enumeratorData; int constructorCount, constructorData; //since revision 2 int flags; //since revision 3 int signalCount; //since revision 4 // revision 5 introduces changes in normalized signatures, no new members // revision 6 added qt_static_metacall as a member of each Q_OBJECT and inside QMetaObject itself // revision 7 is Qt 5 ///    ,      } 

 struct DataMethodInfo{ uint name;///    (    ) uint argsCount; ///   uint argOffset; /// offset    uint tag;/// ,   uint flags;///   private/protected/public    - ,     };