[antimagic]

Yup, sounds a bit like a project I did a while back - I had a C/C++ bindings generator that took an XML file and generated the C/C++ code to expose a C/C++ class to Javascript. So of course the logical thing for me to do was write the thing in Ruby.

That said, all code-generation tools - straight up generators, compilers, whatever - are a mindbending experience. Keeping track of whether a variable is available at generation time or runtime is trickier than I initially expected.

[halostatue]

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.