[alemhnan]

Some enterprise software, most of the patterns are well know and the customization point are well defined. I would describe more as a well know domain with clear constraints than trivial software. They generate a lot of code also for high critical real time software (avionics and space) but that is not really trivial.

[sidlls]

I'm skeptical the code generators are used for the actual function bodies at any level. That's 90% of any non-trivial code, not function and class declarations and stubs.