是否有可能分享C＃和非托管C ++的enum声明？ [英] Is it possible to share an enum declaration between C# and unmanaged C++?

问题描述

有没有分享本机（非托管）C ++和（托管）之间的枚举定义的方法C＃？

Is there a way to share an enum definition between native (unmanaged) C++ and (managed) C#?

我在完全非托管code使用了以下枚举：

I have the following enum used in completely unmanaged code:

enum MyEnum { myVal1, myVal2 };

我们的应用程序有时会使用管理组件。那C＃组件获得的枚举项值作为通过托管C ++互操作的dll整数（从本地的dll）。 （互操作的dll只有C＃组件所需的负载。）的C＃组件已复制了枚举定义：

Our application sometimes uses a managed component. That C# component gets the enum item values as ints via a managed C++ interop dll (from the native dll). (The interop dll only loads if the C# component is needed.) The C# component has duplicated the enum definition:

public enum MyEnum { myVal1, myVal2 };

有没有消除重复头也不回的原生C ++ DLL到托管DLL的方法吗？

Is there a way to eliminate the duplication without turning the native C++ dll into a managed dll?

推荐答案

您可以使用一个cs文件和两个项目之间共享。 的#include 在cs文件在C ++中应该是没有问题的。

You can use a single .cs file and share it between both projects. #include in C++ on a .cs file should be no problem.

这将是一个例子.cs文件：

This would be an example .cs file:

#if !__LINE__    
namespace MyNamespace
{
    public 
#endif

// shared enum for both C, C++ and C#
enum MyEnum { myVal1, myVal2 };

#if !__LINE__
}
#endif

如果你想在一个文件中的多个枚举，你可以做到这一点（虽然你不得不暂时界定公共也没有什么的C / C ++）：

If you want multiple enums in one file, you can do this (although you have to temporarily define public to be nothing for C / C++):

#if __LINE__
#define public
#else
namespace MyNamespace
{
#endif

    public enum MyEnum { MyEnumValue1, MyEnumValue2 };
    public enum MyEnum2 { MyEnum2Value1, MyEnum2Value2 };
    public enum MyEnum3 { MyEnum3Value1, MyEnum3Value2 };

#if __LINE__
#undef public
#else
}
#endif

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