[PyQt] [SIP] bug - wrap argument incorrect if argument's default value is static class member

[Nian Wu]

Hi,

I am wrapping our C++ library with SIP. I met a compile failure when I wrapped a class, the sip script is like:

class KFbxSystemUnit 
{

%TypeHeaderCode
#include <fbxsdk.h>
%End

public:
    struct KFbxUnitConversionOptions
    {
        bool mConvertLightIntensity;
        bool mConvertRrsNodes;  
    };
    
    KFbxSystemUnit(double pScaleFactor, double pMultiplier = 1.0);
    ~KFbxSystemUnit();    
    static const KFbxUnitConversionOptions DefaultConversionOptions;
    void ConvertChildren( KFbxNode* pRoot, const KFbxSystemUnit& pSrcUnit, const KFbxUnitConversionOptions& pOptions = DefaultConversionOptions ) const;
};

The argument "pOptions" of method "ConvertChildren" has default value which is a static class member.

After run sip, the method "ConvertChildren" is wrapped as following:
====================================================================================
1 extern "C" {static PyObject *meth_KFbxSystemUnit_ConvertChildren(PyObject *, PyObject *);}
2 static PyObject *meth_KFbxSystemUnit_ConvertChildren(PyObject *sipSelf,PyObject *sipArgs)
 {
3     int sipArgsParsed = 0;

    {
4        KFbxNode * a0;
5        const KFbxSystemUnit * a1;
6        const KFbxSystemUnit::KFbxUnitConversionOptions& a2def = DefaultConversionOptions;
7        const KFbxSystemUnit::KFbxUnitConversionOptions * a2 = &a2def;
8        KFbxSystemUnit *sipCpp;

9        if (sipParseArgs(&sipArgsParsed,sipArgs,"BJ8J9|J9",&sipSelf,sipType_KFbxSystemUnit,&sipCpp,sipType_KFbxNode,&a0,sipType_KFbxSystemUnit,&a1,sipType_KFbxSystemUnit_KFbxUnitConversionOptions,&a2))
        {
10            sipCpp->ConvertChildren(a0,*a1,*a2);

11            Py_INCREF(Py_None);
12           return Py_None;
        }
    }

    /* Raise an exception if the arguments couldn't be parsed. */
    sipNoMethod(sipArgsParsed,sipName_KFbxSystemUnit,sipName_ConvertChildren);

    return NULL;
}
=====================================================

Please notice the Line 6, the variable " DefaultConversionOptions" is referred as global variable, so compile failed here.

Thanks,
Nian Wu