c++ - C++ 中的二进制封装？

Question

1)c++中什么是二进制封装，c++是否支持二进制封装？

我做了一些搜索，但我发现的只是封装，大致就是将数据和方法包装在一个类中。

2)那么封装和二进制封装有什么区别呢？

Answer 1

引自 this text应该把事情弄清楚:

Whereas C++ does support syntactic encapsulation via its private and protected keywords, the C++ draft standard has no notion of binary encapsulation. This is because the compilation model of C++ requires the client’s compiler to have access to all information regarding object layout in order to instantiate an instance of a class or to make nonvirtual method calls. This includes information about the size and order of the object’s private and protected data members.

澄清一下:句法封装就是用语言的句法来封装。在 C++ 中，这将是 private/protected 关键字。

我通过this thread找到了文本其中也有对该概念的简短解释。

编辑:

正如下面所指出的，C++ 中可以存在二进制封装。参见 this wiki page在不透明指针上获取更多信息。