> If I used the overloaded call operator, all the functions would have to > inherit/derive from the base Function type?
No the call operator works just like any other `proc` it just has special
syntax. If you didn't want to use that syntax in your exported module and just
use it as an implementation detail, I wouldn't worry about it.
Also you could model it like this and avoid those unsafe pointer casts.
type
StateFn = object
rep: proc(b: var bool): StateFn
Run
