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000040_icon-group-sender _Fri Sep 18 12:27:04 1998.msg
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Date: Fri, 18 Sep 1998 08:28:16 -0700
From: kwalker@sfo.harbinger.com (Ken Walker)
Message-Id: <199809181528.IAA12163@varda.premenos.com>
To: icon-group@optima.CS.Arizona.EDU
Subject: Re: Context Switching
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> From leichter@smarts.com Thu Sep 17 12:45:44 1998
>
> There's been a great deal of work on this general issue in the Lisp
> community. In modern Lisp's there's the notion of a closure, which is a
> function plus its execution context as an accessible object. A co-
> expression is the direct Icon analogue of a closure. (A generator is a
> restricted kind of co-expression which, because it is syntactically
> bound to a particular point in the program, can be implemented more
> efficiently.
I thought that the execution context for a Lisp closure was just
data values. Does it also include an execution point so that
you can continue a closure were it's last call left off?
Ken Walker, kenneth.walker@sfo.harbinger.com
Harbinger Coporation, Concord, Ca. 94520