纯虚函数调用 [英] Pure virtual function call

问题描述

我使用boost.python来编写python模块c ++。我有一些基本类与纯虚拟函数，我已导出像这样：

I'm using boost.python to make python-modules written in c++. I have some base class with pure virtual functions which I have exported like this:

class Base
{
    virtual int getPosition() = 0;
};

boost::python::class_<Base>("Base")
   .def("GetPosition", boost::python::pure_virtual(&Base::getPosition));

在Python中我有代码：

in Python I have code:

class Test(Base):
   def GetPosition(self):
      return 404

Test obj
obj.GetPosition()

RuntimeError：纯虚函数

RuntimeError: Pure virtual function called

出现什么问题？

推荐答案

一个析构函数直接或间接调用一个纯虚拟成员。

This error happens when a constructor or a destructor directly or indirectly calls a pure virtual member.

（请记住，在构造函数和析构函数执行期间，动态类型是构造/对于该类型）。

(Remember that during constructor and destructor execution, the dynamic type is the constructed/destructed type and so virtual members are resolved for that type).

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