[C++-sig] "TypeError: No to_python (by-value) converter found for C++ type: Node"

[Stefan Seefeld]

hi there,

I'v stripped down code to reproduce an issue I reported earlier. Please
find attached an extension module as well as a little driver script
that do the following:

Exposed are a 'Node' and a 'Visitor' type. The 'Visitor' is wrapped
to be subclassed in python.
In python, I call

node.accept(visitor)

and expect my node (in C++) to invoke 'VisitorWrapper::visit(this)',
which by means of 'call_method' delegates the call to the python
subclass. The error suggests that the bpl runtime isn't able to
find a python type for 'this'.
Creating a Node via 'create' from within python worked fine, though.

Does anybody have an idea what is going on here ?

Thanks,
		Stefan
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