[kjqgqkejbfefn]

Except the tape gets overwritten/looped over. What GP was referring to is event-sourcing the state in an append-only log and running finite state automata on this sequence.

Here is a java lib that apply regex to stream of Objects that could be used to achieve this purpose.

https://github.com/norswap/skelex

[rhelz]

Thanks for the link, exactly the kind of thing I was talking about.