Subject: [CSG111] CSG111: MP4 Extend-Env-Rec?
From: Wendy (wendybeth.minton@gmail.com)
Date: Sun Feb 26 2006 - 17:23:20 EST
Hi,
I'm having an issue understanding the difference between extend-env and
extend-env-recursively. I'm looking at the code from lecture three, where
both these are not procedures, but types of environments. The only
difference I'm seeing is that extend-env-recursivily is adding a proc body,
and extend-env does not. Is that the only difference, or does the use of
"extend-env-recursivly" imply that recursion is occuring? I'm assuming that
the actual recursion is handled by a call to value-of on a procedure, thus
creating a nesting of such calls to value-of. So the addition of a proc in
an extend-env-recursivly is more or less a place holder in the call stack.
Is this correct, or am I missing something here?
Thanks,
Wendy
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