// qtypeinfo.h
#define Q_DECLARE_TYPEINFO_BODY(TYPE, FLAGS) \
class QTypeInfo<TYPE > \
{ \
public: \
    enum { \
        isComplex = (((FLAGS) & Q_PRIMITIVE_TYPE) == 0), \
        isStatic = (((FLAGS) & (Q_MOVABLE_TYPE | Q_PRIMITIVE_TYPE)) == 0), \
        isLarge = (sizeof(TYPE)>sizeof(void*)), \
        isPointer = false, \
        isDummy = (((FLAGS) & Q_DUMMY_TYPE) != 0), \
        sizeOf = sizeof(TYPE) \
    }; \
    static inline const char *name() { return #TYPE; } \
}

#define Q_DECLARE_TYPEINFO(TYPE, FLAGS) \
template<> \
Q_DECLARE_TYPEINFO_BODY(TYPE, FLAGS)

// qstring.h
class Q_CORE_EXPORT QString
{
...
    Data *d;
...
};
Q_DECLARE_TYPEINFO(QString, Q_MOVABLE_TYPE);

// qvector.h
template <typename T>
typename QVector<T>::iterator QVector<T>::erase(iterator abegin, iterator aend)
{
...
        if (QTypeInfo<T>::isStatic) {
...
        } else {
            destruct(abegin, aend);
            memmove(abegin, aend, (d->size - itemsToErase - itemsUntouched) * sizeof(T));
        }
...
}