CODEWITHSUNDEEP
c#c++enumswrapperswig
user2070238
user2070238

Reputation: 223

Swig enum using values from other library

I would like to use Swig to generate C# wrappers for my c++ classes. I am facing the following problem:

I have defined an enum that uses values from a third party (closed source) library. The values are declared inside HEADER_FROM_3RD_PARTY_LIB.h as 

#define 3RD_PARTY_LIB_CONST_VALUE_1 -4
#define 3RD_PARTY_LIB_CONST_VALUE_1 -10

My header file looks like:

#include "HEADER_FROM_3RD_PARTY_LIB.h"

namespace Foo
{
    namespace Bar
   {    
    class MyClass
    {       
     public:    
            enum MyEnum
        {           
        Enum1 = 3RD_PARTY_LIB_CONST_VALUE_1,            
        Enum2 = 3RD_PARTY_LIB_CONST_VALUE_2     
        };
        }
    }
}

I am using the following swig code:

%module cpp  

%{  
    #include "MyClass.h"  
%}  

%include <windows.i>  
%include "MyClass.h"

The wrapper is successfully generated but the generated csharp file has the following enum generated:

public enum MyEnum
{           
    Enum1 = 3RD_PARTY_LIB_CONST_VALUE_1,            
    Enum2 = 3RD_PARTY_LIB_CONST_VALUE_2     
}

Obviously this generates an error since C# cannot find the 3RD_PARTY_LIB_CONST_VALUE_1 and 3RD_PARTY_LIB_CONST_VALUE_2 values.

Any ideas who could this be resolved? I had a look at Swig examples but could not find something similar.

Upvotes: 1

Views: 571

Answers (1)

user2070238
user2070238

Reputation: 223

The only solution I found so far was either to include 

#include "HEADER_FROM_3RD_PARTY_LIB.h"

in the swig file or redefine the values again in the swig file

#define 3RD_PARTY_LIB_CONST_VALUE_1 -4
#define 3RD_PARTY_LIB_CONST_VALUE_1 -10

Any other suggestions how this could be improved? The problem with the first approach is that by including the entire header file I get lots of auto generated files that I do not need.

Upvotes: 1

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