[C++-sig] Overloaded pure virtual method

[Mark Williams]

Hi, I'm having some difficulty understanding the syntax for binding pure virtual member functions with default arguments. Here
is a simple class definition:

class TestOverloads
{
	public:
		virtual ~TestOverloads() {}
		virtual void overloaded(float f = 0) =0;
		
};

I have also defined:

BOOST_PYTHON_MEMBER_FUNCTION_OVERLOADS(MyOverloads, overloaded, 0, 1);

Now, I find that the following does not compile:

class_<TestOverloads, boost::noncopyable>("TestOverloads", no_init)
	 .def("overloaded", pure_virtual( &TestOverloads::overloaded), MyOverloads() );

But the following does compile:

class_<TestOverloads, boost::noncopyable>("TestOverloads", no_init)
	 .def("overloaded", pure_virtual( &TestOverloads::overloaded) );

If I remove the =0 pure virtual specification from the class definition then I can at least compile:

class_<TestOverloads, boost::noncopyable>("TestOverloads", no_init)
	 .def("overloaded", &TestOverloads::overloaded, MyOverloads() );

So it would appear to be some combination of pure_virtual with BOOST_PYTHON_MEMBER_FUNCTION_OVERLOADS

What am I doing wrong here, please?

Thanks,

Mark