Implementor here. Richard O'Keefe deserves all the credit as he had the idea and suggested the syntax (EEP 37). I just noticed that it was easy to implement it

Implementor here. Richard O'Keefe deserves all the credit as he had the idea and suggested the syntax (EEP 37). I just noticed that it was easy to implement it through let rec expressions in Core Erlang. No VM changes were required.