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environment idiom
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Date: 2004-12-10 (11:59)
From: Richard Jones <rich@a...>
Subject: Re: [Caml-list] Re: environment idiom
On Thu, Dec 09, 2004 at 03:12:25PM +0200, Ville-Pertti Keinonen wrote:
> On Thu, 2004-12-09 at 09:09 +0000, Richard Jones wrote:
> > Just an observation here:
> > 
> > The object method seems to be compile-time safe, whereas the hash
> > method seems to require run-time checks which could fail.  Am I right
> > in thinking this?  If so, the compile-time safe version is infinitely
> What run-time checks?  OCaml is statically typed, it has no run-time
> type checking.  Only things like array bounds are checked at run-time.
> The hash method is typed similarly to the following:

I was talking about the use of the Hashtbl.  Hashtbl.find can throw a
Not_found error at runtime if the environment happens not to contain
the required data.  This is a sort of runtime check.


Richard Jones.
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