On Tuesday, 15 September 2015 at 17:45:45 UTC, Freddy wrote: > Would it be worth implementing some kind of typestate into the > language? > By typestate I mean a modifiable enum. > > [...] Article about this in C# and F#: http://enterprisecraftsmanship.com/2015/09/28/c-and-f-approaches-to-illegal-states/