#include <boost/python.hpp>
#include <iostream>
class Base
{
public: Base() {}
public: int getValue() { return 1; }
};
typedef boost::shared_ptr<Base> BasePtr;
class ParentA : public Base
{
public: ParentA() : Base() {}
};
typedef boost::shared_ptr<ParentA> ParentAPtr;
class Collector
{
public: Collector() {}
public: void addParent(BasePtr& parent)
{
std::cout << parent->getValue() << std::endl;
}
};
typedef boost::shared_ptr<Collector> CollectorPtr;
ParentAPtr createParentA()
{
return ParentAPtr(new ParentA());
};
BOOST_PYTHON_MODULE(hello)
{
boost::python::class_<Base, BasePtr, boost::noncopyable>("Base",
boost::python::no_init)
.def("getValue", &Base::getValue)
;
boost::python::class_<ParentA, ParentAPtr, boost::python::bases<Base>>("ParentA")
;
boost::python::implicitly_convertible< ParentAPtr, BasePtr >();
boost::python::def("createParentA", createParentA);
boost::python::class_<Collector, CollectorPtr>("Collector")
.def("addParent", &Collector::addParent)
;
}
import hello
p = hello.createParentA()
c = hello.Collector()
c.addParent(p)
我在使用Boost Python从Python上传一个shared_ptr时遇到了一些问题。
class Base() {...};
class ParentA(): public Base {...};
class ParentB(): public Base {...};
typedef boost::shared_ptr<Base> BasePtr;
typedef boost::shared_ptr<Parent> ParentPtr;
class Collector()
{
void addParent(BasePtr& parent) {...}
}
typedef boost::shared_ptr<Collector> CollectorPtr;
BOOST_PYTHON_MODULE(PythonModule)
{
boost::python::class_<Collector, CollectorPtr>("Collector")
.def("addParent", &Collector::addParent)
boost::python::class_<Base, BasePtr, boost::noncopyable>("Base",
boost::python::no_init)
...
;
boost::python::class_<ParentA, ParentAPtr,
boost::python::bases<Base>>("ParentA",
boost::python::init<>())
...
;
boost::python::implicitly_convertible< ParentAPtr, BasePtr >();
}
在Python中我们做:
from PythonModule import *
p = ParentA()
c = Collector()
c.addParent(p) # Fails here because no upcast is happening.
关于如何使这项工作的任何想法?
在VS2008上编译,使用BOOST 1.44和Python 3.0。
谢谢,
答案 0 :(得分:1)
好的......在准备真正的示例代码时,我提出了解决方案。问题出在Collector.addParent(BasePtr&amp; parent)中。似乎Boost Python不喜欢它作为参考。将它更改为Collector.addParent(BasePtr parent)修复它。感谢您对此进行调查。
答案 1 :(得分:0)
尝试Collector.addParent(const BasePtr&amp; parent)