In the 80s I wrote a Transport Layer as a computed GOTO via a PL/1 language feature, basically it was a finite state machine. I think a lot of problems which r

In the 80s I wrote a Transport Layer as a computed GOTO via a PL/1 language feature, basically it was a finite state machine. I think a lot of problems which reduce down to this are done by function-table lookups (as in, look up in a table the index of the next state, and call the function) but for the language I had, that wasn't an option.