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Date: Sat, 29 Jan 2005 14:42:18 +0100
From: Remi Vanicat <remi.vanicat@gmail.com>
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To: caml-list <caml-list@inria.fr>
Subject: Re: [Caml-list] cyclic types
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On Sat, 29 Jan 2005 14:15:43 +0200, Radu Grigore <radugrigore@gmail.com> wrote:
> Why are cyclic types forbidden?
> 
> I was forced to use the definition:
>   type forest = Forest of forest StringMap.t | Empty
> where I would have rather used
>   type forest = forest StringMap.t
> The error is:
>   The type abbreviation tree is cyclic

You can use the -rectypes of the ocaml compiler or toplevel to allow
cyclic type.