创建一个带有现有基类对象的派生类对象？

问题描述

是否有可能（或快速解决方法）创建一个定义为派生类的对象，而不在内存中创建基类对象;而派生对象应该引用基类的实际存在的对象（接管其内存驻留）？这是因为速度的原因 - 创建一个派生对象，将数据从基类对象复制到它，然后销毁基本对象需要太多时间。

Is there a possibility of (or fast workaround for) creating an object defined as derived a class without creating base class object in memory; instead the derived object should refer to the actually existing object of base class ("take-over" its memory residence)? This is needed for speed reasons - creating new a derived object, copying data from base class object to it, and then destroying base object takes too much time.

推荐答案

在这种情况下，您可能需要考虑合成而不是继承 - 这将更自然。

You might want to consider composition instead of inheritance in this case - it would be more natural.

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