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How important are circular lists/recursive objects?
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Date: 2007-04-04 (03:53)
From: Stefan Monnier <monnier@i...>
Subject: Re: How important are circular lists/recursive objects?
> The question is: if this behavior was completely outlawed, and either you
> couldn't build up circular lists/recursive data structures of this type at
> all, or had to call special functions (List.circularize, say), to create
> them, would this be a signifigant problem?  Does anyone actually use this
> construct, and if so, for what?

This is the case in SML: you need to go through a `ref' cell in order to
create a cycle.  This has very rarely been presented as
a serious limitation.  OCaml's trick is occasionally useful, but I don't
think anybody would lose her sleep over it.