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Void type?
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Date: 2007-07-28 (04:51)
From: Chris King <colanderman@g...>
Subject: Re: [Caml-list] Void type?
On 7/28/07, Stefan Monnier <monnier@iro.umontreal.ca> 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).

- Chris