[baweaver]

The testing utilities are also great. The difficulty, I'd say, is inherit to working with ASTs and simplifying it is hard. They tried with Node Pattern, synvert tried with NQL, and I wanted to try with pattern matching and potentially more in-Ruby approaches.

Nothing particularly wrong with any of them, but trying to sort out what's not matching and getting an answer for now "close" a node was is a bit involved. Go far enough down that hole and you hit tree edit distance and Zhang Sha Sha algorithms.