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Re: So, what the heck is a continuation anyway?
> Sender: email@example.com
> Cc: firstname.lastname@example.org, email@example.com
> From: firstname.lastname@example.org (Gregory T. Sullivan)
> Date: 11 Dec 2001 11:40:47 -0500
> (2) If you are considering providing continuations at the VM level,
> you may consider distinguishing between downward continuations and
> general continuations (that may be returned upwards). If you know
> a continuation is downward-only, it is very cheap to implement.
> The first two examples in the R5RS documentation for call/cc
> (available in info format at ) are downward continuations:
Again, people at INDIANA have studied this in depth and have a pretty neat
paper on one-shot, downward, and general continuations. Take a look. PLDI.