C Class's characteristics (From other web site)

最新推荐文章于 2025-10-06 15:38:12 发布

原创最新推荐文章于 2025-10-06 15:38:12 发布 · 544 阅读

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#class #c #web #construction #destructor #constructor

本文探讨了CBase类的主要特性，包括其成员变量在堆上分配时的零初始化、虚拟析构函数以及私有的拷贝构造函数和赋值操作符。基于这些特性，从CBase派生的Cclass继承了类似的属性，如必须在堆上分配以确保零初始化，拥有正确的清理保障，并可能需要显式的拷贝构造函数或赋值操作符。

C class is one derived from class CBase.
The CBase class has the following main characteristics:
* Data members are always zeroed upon construction if an object is created on the heap because operator new() is overloaded.
* CBase has a virtual destructor
* CBase has private copy constructor and assignment operator Thus, the following characteristics of C classes arise:
* They should always be allocated on the heap to ensure zero-initialization.
* They inherit the virtual destructor of the base class, so can be guaranteed to be cleaned up correctly.
* They need an explicit copy constructor or assignment operator if there is clear intention that a particular class will support copying C classes typically have ownership of other C classes or resources that need cleanup. Since these resources often have non-trivial construction and, because of the possibility that a leave might occur during the construction process, C classes typically use the two-phase construction idiom.