[C++-sig] Boost.Python : Protected Destructor

[Brian O'Kennedy]

Hi, 

 

I'm trying to wrap a class like the one below which has a protected dtor
and should be destructed via the Destroy method. 

 

class Foo

{

public:

  int bar() { return 1; }

  void Destroy() { delete this; }

protected:

  ~Foo() { Destroy(); }

};

 

My Boost.Python code looks like this:

 

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

    .def( "bar", &Foo::bar );

 

 

I had to add both the boost::noncopyable and the no_init to stop
compilation errors, but this means that I have no way of creating Foo
from within Python. 

 

I can get around this by creating a factory method and registering the
pointer:

  boost::shared_ptr< Foo > FooCreator()

  {

    return boost::shared_ptr< Foo >( new Foo(), boost::bind(
&Foo::Destroy, _1 ) );

  }

And 

  def("FooCreator", FooCreator );

  register_ptr_to_python< boost::shared_ptr< Foo > >();

 

 

This feels a little clunky though.  Am I doing something very wrong? Is
there an easier way to manage classes like this with protected
destructors?      

 

Thanks, 

 Brian

 

 


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