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Article View: comp.lang.functional
Article #520

Re: A question about types in ML

#520
From: Jeff Dalton
Date: Wed, 21 Nov 1990 17:18
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In article <11937@life.ai.mit.edu> tmb@ai.mit.edu writes:
>In article <PETERSON-JOHN.90Nov15223106@object.cs.yale.edu>, peterson-john@cs.yale.edu (John C. Peterson) writes:
>|> Regarding typing in Common Lisp & ML, it is incorrect to say that
>|> Common Lisp lacks types; type declarations in CL are actually far more
>|> general than those in ML.  What Common Lisp lacks is any sort of well
>|> defined type inference, a major deficiency.
>
>I didn't say that "CL lacks types", but that it does not have support
>for "handling typing". 

But it does have support for "handling typing".  It may not be enough
support (in your view), it may not be the support you want, but your
claim that there is no support whatsoever is just false.

>The fact that you can declare very general types
>that the compiler cannot possibly check at compile time is one
>indication of the problem. Sorry if I was imprecise.

If this is one indication of the problem, what is the problem?
I don't doubt that the CL treatment of types has all sorts of
problems, from various points of view.
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References: <fraser.658398987@melomys> <4906@rex.cs.tulane.edu> <PETERSON-JOHN.90Nov15223106@object.cs.yale.edu> <11937@life.ai.mit.edu>

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From: jeff@aiai.ed.ac.uk (Jeff Dalton)
Newsgroups: comp.lang.functional
Subject: Re: A question about types in ML
Message-ID: <3800@skye.ed.ac.uk>
Date: 21 Nov 90 17:18:56 GMT
References: <fraser.658398987@melomys> <4906@rex.cs.tulane.edu> <PETERSON-JOHN.90Nov15223106@object.cs.yale.edu> <11937@life.ai.mit.edu>
Reply-To: jeff@aiai.UUCP (Jeff Dalton)
Distribution: comp
Organization: AIAI, University of Edinburgh, Scotland
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