got it, "reversible computing" has nothing to do with writing code that can run backwards or forwards, nothing at all, I may as well be talking about the weather and here you guys are trying to have a serious conversation about theoretics ;) I'll see myself out - never change, HN!
There are different senses of "forwards and backwards". There's nothing particularly wrong with yours, there's nothing particularly wrong with the other one, but they aren't the same.
"Reversible computing" here means that you can run it backwards in the sense of undoing what was done by running it forwards.
You're talking about data flowing in opposite directions, while in every case your program runs forwards doing its thing.
