C++ Qt 中的智能指针
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Smart pointers in Qt
提问by alexkr
Like it has been written hereQt up to now has 8 specilized smart pointer classes. It looks like it is all you will ever need. However, in order to use any of these smart pointers your class must be derived from QObject which is not always convenient. Is there other implementations of smart pointers in Qt which work with arbitrary classes?
就像这里写的那样Qt 到现在为止有 8 个专门的智能指针类。看起来这就是您所需要的一切。但是，为了使用这些智能指针中的任何一个，您的类必须从 QObject 派生，这并不总是很方便。Qt 中是否有其他智能指针实现可以与任意类一起使用？
采纳答案by Paul Dixon
Many Qt classes are derived from QObject, and while some of the built in smart pointer classes are related to QObject (or QSharedData), the QSharedPointerand QScopedPointertemplates appear to allow pointers to anything.
许多 Qt 类是从 QObject 派生的，虽然一些内置的智能指针类与 QObject（或 QSharedData）相关，但QSharedPointer和QScopedPointer模板似乎允许指向任何东西的指针。
Beyond that, you'll find some smart pointer templatesin Boost:
- scoped_ptr- Simple sole ownership of single objects. Noncopyable.
- scoped_array- Simple sole ownership of arrays. Noncopyable.
- shared_ptr- Object ownership shared among multiple pointers.
- shared_array- Array ownership shared among multiple pointers.
- weak_ptr- Non-owning observers of an object owned by shared_ptr.
- intrusive_ptr- Shared ownership of objects with an embedded reference count.
- scoped_ptr- 单个对象的简单唯一所有权。不可复制。
- scoped_array- 数组的简单唯一所有权。不可复制。
- shared_ptr- 在多个指针之间共享的对象所有权。
- shared_array- 在多个指针之间共享的数组所有权。
- weak_ptr- shared_ptr 拥有的对象的非拥有观察者。
- intrusive_ptr- 具有嵌入引用计数的对象的共享所有权。
