I was quite amused by the design of Oniguruma [1] which is essentially the Ruby's regular expression library. It contains tons of associated tables for each sup

I was quite amused by the design of Oniguruma [1] which is essentially the Ruby's regular expression library. It contains tons of associated tables for each supported character encoding---segmentation, character types, case folding and the likes. I found it ironical that the non-ASCII case folding doesn't seem to work for most CJK character encodings though (in my shallow analysis). [1] https://github.com/kkos/oniguruma https://github.com/kkos/oniguruma