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[Caml-list] assertions or exceptions?
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Date: 2004-07-15 (20:49)
From: John Carr <jfc@m...>
Subject: Re: [Caml-list] Unboxing options, was RE: assertions or exceptions?

[None represented internally as 0]

> What's the representation of Some(None) then?  The Some() goes away, and 
> the containing value is unboxed- it turns out to be the same as just None.  
> There is no way to differentiate Some(Some(Some(Some(None)))) from None.

There is also no way to distinguish 0 from None in the current
system.  OCaml relies on type information to determine the meaning
of a value.

Is there valid code (no Obj.magic) that cares that (Some None) and
(None) are both represented by the same bit pattern?

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