boostorg / boostorg/python

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

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11 小時 22 分鐘
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2

描述

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")
.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

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研究方向

Start by reproducing the supplied C++ Boost.Python example and trace the failure from add_static_property during exposeDerived. Investigate how inherited static properties with the same name are handled; done means the module imports successfully while Base.Name and Derived.Name remain distinct.

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評估

技術堆疊
cpp, python
領域
api
Issue 類型
缺陷
難度
4/5
預估耗時
3-5 天
活躍度
停滯
描述清晰度
基本清楚
新手友好度
45/100

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