Continuation Environment and more

Hi All,
I'm digging into SISC source code and I'd like to thank Scott, Matthias 
and the other developers for your excellent work!

Some time ago I had some email exchanged with Matthias following the 
comments about this feature request:

https://sourceforge.net/tracker/index.php?func=detail&aid=1452126&group_id=23735&atid=379537

I appreciate very much the procedures current-breakpoint-args and 
set-current-breakpoint-args! but I'm wondering if it was possible to 
access the environment of a given continuation, somethink like:

(env-lookup kont symbol)
(set-env-binding! kont symbol new-value)

forgive me for the horrible procedure names... this would be enough to 
build a more useful debugger.

Going further, I'm sure you know this paper:

http://scheme2006.cs.uchicago.edu/10-culpepper.pdf

it describes the macro stepper implemented by PLT-scheme. I guess it's 
not simple to implement, but maybe you could put such functionalities at 
the end of your very-long-term TODO list... ;-)

Thank you very much
Bye

-- 
Cesare

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