My version of that was parsing generated C++ code headers through Doxygen (XML format) and then writing up a Ruby script that would spit out generated C++, C#,

My version of that was parsing generated C++ code headers through Doxygen (XML format) and then writing up a Ruby script that would spit out generated C++, C#, and Java to expose the SOAP APIs we needed to do. It was fun, and I think the company is still using it, four years after I left.