Absolutely, great example! I have looked at quite a few implementations of preprocessors, and they're not simple. I don't trust anyone who thinks it's simple

Absolutely, great example! I have looked at quite a few implementations of preprocessors, and they're not simple. I don't trust anyone who thinks it's simple without actually having implemented it -- and tested it on real code. One older thread: https://news.ycombinator.com/item?id=10945552 https://news.ycombinator.com/item?id=10945552