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From: jinx@zurich.ai.mit.edu (Guillermo J. Rozas)
Newsgroups: comp.lang.scheme
Subject: Re: How to redefine a procedure (extend it) and have nobody notice
Message-ID: <JINX.91Apr4112020@chamarti.ai.mit.edu>
Date: 4 Apr 91 16:20:20 GMT
References: <9104041549.AA16630@schizo>
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Organization: M.I.T. Artificial Intelligence Lab.
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In-reply-to: gjc@mitech.COM's message of 4 Apr 91 12:43:07 GMT


    Did anyone ever propose the use of &KEY return values?

    I'm suprised that I never heard of any such proposal. 

    (In the Lisp world I know of).

This issue is independent of the rest.  Scheme does not currently have
&KEY arguments, and if they were added to LAMBDA expressions, they
would automatically work for return values as long as the primitive
for collecting multiple values was 

(call-with-values <value-generating-thunk>
  <consumer-procedure>)