CODEWITHSUNDEEP
c++boost-python
Avinash
Avinash

Reputation: 13267

Boost::python static method returning instance of the class

Following is the my C++ class

namespace X {
  class ChildFactory: public Father {
  public:
    static ChildFactor* createChildFactory(const properties* ptr = NULLPTR);
  private :
    // no instances allowed
    ChildFactory();
    ChildFactory(const properties* ptr);
    ~ChildFactory();
  };
};

following is how I have defined the Boost::Python constructs.

BOOST_PYTHON_MODULE(TestPy) 
{
  boost::python::class_<X::ChildFactory, boost::noncopyable>("ChildFactory")
    .def("createChildFactory", &X::ChildFactory::createChildFactory,  boost::python::return_value_policy<boost::python::manage_new_object>() )
    .staticmethod("createChildFactory")
  ;
}

But it is giving me weird compiler template error.

Error is 

destructor could not be generated because a base class destructor is inaccessible

Upvotes: 2

Views: 1947

Answers (3)

jfs
jfs

Reputation: 414835

manage_new_object might use auto_ptr<> which requires delete pointer_to_ChildFactory to work which needs access to ~ChildFactory().

Upvotes: 0

Paul Manta
Paul Manta

Reputation: 31597

Try exposing your class as having no_init:

class_<Foo, boost::noncopyable>("Foo", no_init);

Upvotes: 1

agustin
agustin

Reputation: 104

destructor could not be generated because a base class destructor is inaccessible

So did you solve it?

If not, what that means it is you declared your constructor function in the private section of the class, thats why it can not be accessed. In fact you can not instantiate that class, it can only be used as a singleton.

Move your 

ChildFactory();
~ChildFactory();

to the public section and lets us know.

Upvotes: 0

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