在哪里声明BOOST_CLASS_EXPORT进行序列化 [英] Where to declare BOOST_CLASS_EXPORT for serialization

问题描述

我要序列化数据，并且具有多态类.

I want to serialize my data and i have polymorphic classes .

最初，当我学习序列化的过程时，我在其头文件中声明了Inherited类.

Initially when i was learning the process of the Serialization i declared the Inherited class in their header files.

  Header file for Sphere which is sub class of geometry
  BOOST_CLASS_EXPORT(Sphere)

但是当我尝试在我的项目中执行操作时，出现链接器错误2005，指出该对象已在对象中定义.

but when i tried doing in my project i got the linker error2005 stating that the object is already defined in the object.

因此，我尝试在cpp文件中声明BOOST_CLASS_EXPORT(Sphere)，但随后我得到了未注册或导出错误消息的派生类.

So i tried declaring the BOOST_CLASS_EXPORT(Sphere) in the cpp file but than i got error message derived class not registered or exported.

最终，我通过在Main文件中声明派生类使它起作用.

Eventually i got it working by declaring the derived class in the Main file.

  BOOST_CLASS_EXPORT_GUID(Sphere, "Sphere"); 

但是这里的问题是，如果我有30个对象，则需要在主文件中声明它们；如果我添加任何新类，则需要再次在主文件中声明它们.

But the problem here is that if i have 30 objects i will need to declare them in the main file and if i add any new classes than again i need to declare them in main file.

我可以在其类的标头或cpp文件中定义导出.

Can i define the export in their header or cpp files of the class.

推荐答案

您要分隔导出KEY和IMPLEMENTATION.

You want to separate the export KEY and IMPLEMENTATION.

我有一些非常完整的答案，其中一些还涉及多态性和抽象基础.看到那里有很好的建议:

I have some very complete answers up, some of which also touch on polymorphism and abstract bases. See there for good suggestions:

• 最简单的介绍 Boost序列化-导出多个CPP文件(没有代码，但也许最具解释性)
• 一个完整的示例，其中包含更多解释和文档引文，使用多个翻译单元: BOOST_CLASS_EXPORT_ *宏不是像register_type()一样工作(完成了几个源文件和makefile)
• 另一个具有多个翻译单元的示例 boost的序列化嵌套结构不起作用
• 混合静态多态和动态多态的微妙陷阱:序列化多态界面
• 为什么提升::尽管看起来一切正常，序列化还是不起作用? (未注册的课程")
• 火箭科学黑客:对衍生类进行Boost序列化与私人成员

• The simplest introduction Boost Serialization - Exporting in multiple CPP files (no code, but perhaps most explanatory)
• A complete example with more explanation and documentation quotes, in multiple translation units: Boost serialization, loading an archived class by base type gives wrong data
• BOOST_CLASS_EXPORT_* macros are not working like register_type() (complete with several source files and makefile)
• Another sample with multiple translation units boost serialization of nested struct does not work
• A subtle pitfall mixing static polymorphism and dynamic polymorphism: Serialize Polymorph Interface
• Why does boost::serialize not work despite everything seeming right? ("unregistered class")
• Rocket science hacks: Boost serialization of derived class with private members

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