I am a current undergraduate staff member for the UC Berkeley CS61AS
introductory CS course. We switched from STK Scheme to Racket this summer,
and were interested in creating an environment diagram drawer similar to Online
Python Tutor <http://www.pythontutor.com/> for Racket. OPT is available on
GitHub and uses a frontend to draws the diagrams from a JSON representation
of frames for each step of execution. Backends exist for various languages,
but not for Scheme/Racket.
I messaged Dr. Tobin-Hochstadt ("samth") but it turns out he didn't write
the debugger, and pointed me here. I was wondering how I could get started
with building such a environment diagram drawer backend. Thanks. I've read
through parts of drracket/drracket/gui-debugger, and have a vague grasp on
the Racket mixin system, plugins, (syntax) objects, but any guidance is
welcome.
Tony
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