Parsing of AttributeNodes in template argument fails

[poshul]

I have the following code: IteratorWrapper[(libcpp_set[ DataProcessingSoftware].iterator)] software_ref which leads to autowrap crashing since AttributeNodes are not handled in PXDParser _extract_type. I've tried to make changes to the handler (adding a case to handle AttributeNodes) but I cannot figure out how to update the CppType object to be an iterator of the above type.