使用Boost的Python和放大器;的std :: shared_ptr的 [英] Using Boost Python & std::shared_ptr

问题描述

我试图让Python的提升与性病:: shared_ptr的发挥很好。目前，我收到此错误：

I'm trying to get Boost Python to play nicely with std::shared_ptr. Currently, I'm receiving this error:

Traceback (most recent call last):
  File "test.py", line 13, in <module>
    comp.place_annotation(circle.centre())
TypeError: No to_python (by-value) converter found for C++ type: std::shared_ptr<cgl::Anchor>

从调用circle.centre（），它返回一个std :: shared_ptr的。我可以shared_ptr的改变每的std ::到一个boost :: shared_ptr的（这升压用Python很好地扮演）code的不过量pretty改变相当大的，我想使用标准库。

From calling circle.centre(), which returns an std::shared_ptr. I could change every std::shared_ptr to a boost::shared_ptr (which Boost Python plays nicely with) however the amount of code to change in pretty considerable and I'd like to use the standard library.

Circle方法声明如下：

The circle method is declared like this:

const std::shared_ptr<Anchor> centre() const
{
    return Centre;
}

锚类是这样的：

class Anchor
{
    Point Where;
    Annotation* Parent;
public:

    Anchor(Annotation* parent) :
        Parent(parent)
    {
        // Do nothing.
    }

    void update(const Renderer& renderer)
    {
        if(Parent)
        {
            Parent->update(renderer);
        }
    }

    void set(Point point)
    {
        Where = point;
    }

    Point where() const
    {
        return Where;
    }
};

和相关升压Python的code是：

And the relevant Boost Python code is:

class_<Circle, bases<Annotation> >("Circle", init<float>())
.def("radius", &Circle::radius)
    .def("set_radius",  &Circle::set_radius)
    .def("diameter", &Circle::diameter)
    .def("top_left", &Circle::top_left)
    .def("centre", &Circle::centre);

// The anchor base class.
class_<Anchor, boost::noncopyable>("Anchor", no_init)
    .def("where", &Anchor::where);

我使用升压1.48.0。任何想法？

I'm using Boost 1.48.0. Any ideas?

推荐答案

貌似的boost :: Python不支持C ++ 11的std :: shared_ptr的。

Looks like boost::python doesn't support C++ 11 std::shared_ptr.

如果你看看到文件升压/蟒蛇/转换器/ shared_ptr_to_python.hpp你会发现执行模板函数shared_ptr_to_python的（shared_ptr的＆LT; T＆GT;常量和放大器; X）升压:: shared_ptr的（它解释了为什么code ++工程，罚款的boost :: shared_ptr的）。

If you have a look to file boost/python/converter/shared_ptr_to_python.hpp you'll find implementation of template function shared_ptr_to_python(shared_ptr<T> const& x) for boost::shared_ptr (it explain why the code works fine for boost::shared_ptr).

我觉得你有几种选择：

• 使用升压:: shared_ptr的（你试图避免）


• 编写shared_ptr_to_python的实施的std :: shared_ptr的（恕我直言最好的选择）


• 发送请求的boost :: Python开发者支持的std :: shared_ptr的

这篇关于使用Boost的Python和放大器;的std :: shared_ptr的的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！