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Re: [Chicken-hackers] extending define-values


From: John Cowan
Subject: Re: [Chicken-hackers] extending define-values
Date: Mon, 8 Apr 2013 17:28:53 -0400
User-agent: Mutt/1.5.20 (2009-06-14)

Felix scripsit:

> "define-values" can not simply expand into a bunch of "defines".
> To allow it to be intermixed with "define" in internal definitions,
> it needs be special cased, due to the use of "call-with-values" (which
> would "break" the sequence of definitions and treat all following
> forms of the body as non-definitions). Or not?

No, the call to call-with-values is wrapped in a definition too.
It really is turtles all the way down.

> BTW, where can I find the portable reference implementation you
> mentioned?

In Section 7.3 of the ninth draft, pp. 69-70.  Unfortunately,
trac.sacrideo.us seems to be down, but it's normally at
<http://trac.sacrideo.us/wg/raw-attachment/wiki/WikiStart/r7rs-draft-9.pdf>.
There's a temporary copy at <http://www.ccil.org/~cowan/temp/r7rs-draft-9.pdf>.

-- 
"But I am the real Strider, fortunately,"       John Cowan
he said, looking down at them with his face     address@hidden
softened by a sudden smile.  "I am Aragorn son  http://www.ccil.org/~cowan
of Arathorn, and if by life or death I can
save you, I will."  --LotR Book I Chapter 10



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