Stefan Monnier wrote:
>>> Is there a void type in OCaml (i.e. a type which has no values), or a way to
>>> simulate it?
> 
>> If you're looking for a "true" void (as opposed to the unit type,
>> which has exactly one value), just declaring it as an abstract type:
> 
>> type void
> 
>> should do the trick.  You will be unable to instantiate any values of
>> that type using pure O'Caml (i.e. no Obj.magic or C code).
> 
> But can I pass [] to a function that expects a "void list"?


Yes. It is the only list of type void list.

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