Exposing inherited static member variables as static property with the same name leads to exception

まず、提供された C++ Boost.Python の例を再現し、exposeDerived 内の add_static_property から失敗を追跡します。同じ名前を持つ継承された静的プロパティがどのように扱われるかを調査します。完了条件は、モジュールが正常に import でき、Base.Name と Derived.Name が別々のままであることです。

This bug has been reported by Luke Titley in 2009 on boost-build mailing list. It is still reproducible with the version of boost python 1.65 on Visual C++ 2017. I'm using the Luke's code snippet to show the problem.

There are two boost python classes, one inheriting from the other; each with a static member variable of the same name.

//---------------------------------------------------------------------------------------
// C++ Classes
//---------------------------------------------------------------------------------------
class Base
{
public:

static const wstring Name;

};
const wstring Base::Name(L"Base");

//---------------------------------------------------------------------------------------
class Derived : public Base
{
public:

static const wstring Name;

};
const wstring Derived ::Name(L"Derived");

//---------------------------------------------------------------------------------------
// Boost Python Bindings
//---------------------------------------------------------------------------------------
wstring getBaseName()
{
return Base::Name;
}
void exposeBase()
{
py::class_("Base")
.add_static_property("Name", &getBaseName) ;
}

//---------------------------------------------------------------------------------------
wstring getDerivedName()
{
return Derived::Name;
}
void exposeDerived()
{
py::class_<Derived, bases >("Derived")
.add_static_property("Name", &getDerivedName) ;
}

//---------------------------------------------------------------------------------------
BOOST_PYTHON_MODULE(nmx)
{

exposeBase();
exposeDerived();

}

The import of the module fails and it's caused by throwing exception in exposedDerived (add_static_property).

Best Regards,
Gabriel