[C++-sig] Confusion about inheritance with boost.python

[David Abrahams]

Noah Schwartz <noah.schwartz1 at gmail.com> writes:

> struct AWrap : A, wrapper<A> {
> 	int f() {
> 		return 0;
> 	}
> };
>
> BOOST_PYTHON_MODULE(libnn)
> {
> 	class_<AWrap, boost::noncopyable>("A")
> 		.def("f", pure_virtual(&A::f))
> 		;
> }

This doesn't look right.  If A::f is supposed to be exposed as pure
virtual, you shouldn't be overriding it in AWrap.

> However when I load my module in python I get a complaint about the
> undefined symbol A.

Please post the complete text of the complaint.  In fact, please also
post a reproducible example containing one C++ file and one Python
file.

-- 
Dave Abrahams
Boost Consulting
www.boost-consulting.com