Ray tracer in Stalin - comp.lang.scheme

Message from discussion Ray tracer in Stalin

Förster vom Silberwald

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More options 20 Aug 2005, 09:07

Newsgroups: comp.lang.scheme

From: "Förster vom Silberwald" <chain_l...@hotmail.com>

Date: 20 Aug 2005 01:07:18 -0700

Local: Sat 20 Aug 2005 09:07

Subject: Re: Ray tracer in Stalin

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Marco Antoniotti wrote:
> But the following looks very much like Common Lisp
> (use-package "UNIFY")
> (defun map2 (fun list-1 list-2)
> (match-case (list list-1 list-2)
> ((() ()) ())
> (((?h1 . ?t1) (?h2 . ?t2))
> (cons (funcall fun h1 h2) (map2 fun t1 t2)))
> ((_ _) (error "Invalid list arguments to map2: ~S ~S." list-1
> list-2)))

That is very interesting. Thanks for the pointer. Didn't know that
Common Lisp has some inherent potential.

Would be interesting to hear whether Bigloo pinched from Common Lisp
(or the package thereof) or whether the "UNIFY"-package and Bigloo its
pattern-matching implementations derive from the same source in the
literature.

I must honestly say, that I do not feel the urge very often for using
pattern-matching in Scheme. However, I find the Bigloo
patttern-matching facilty cool (okay I must honestly say: for the very
first time I find Common Lisp also cool).

Beauty is in the eye of the beholder.

Schneewittchen
PS: Sorry I didn't know that it will also appear on comp.lang.lisp (I
writing from com.lang.scheme, though).

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