This destructor would have to be called specifically before unsetting the parent class reference.
这种解构器必须在解除父类引用之前进行调用。
A class can only have one destructor.
一个类只能有一个析构函数。
A call is made to a destructor of incorrect type.
对错误类型的析构函数进行了调用。
Although a destructor is a method, it cannot have parameters.
尽管析构函数是一种方法，但它不能有参数。
First, the destructor of the object that's being deleted is called.
首先，调用将要被删除的对象的析构函数。
For example, a new slot cannot be requested on a destructor or finalizer.
例如，无法在析构函数或终结器上请求一个新的槽。
If the destructor is empty, this simply results in a loss of performance.
如果析构函数为空，只会导致性能降低。
If the destructor is empty, this simply results in a loss of performance.
如果析构函数为空，只会导致性能降低。
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