Hello,

I am currently the lead developer on a student project that is doing an 
independent implementation of *R7RS* Scheme in C++11. I am looking at other 
Scheme implementations as we are currently tackling the first of the 
primitive expressions, and I would love to see how other people do it.

We are taking a pointer-based tree model as our implementation for 
simplicity. One of our tentative and internal goals for the project is to 
create great documentation so that those that are looking into implementing 
languages can begin to learn by looking at a simple evaluation model.

I would like to know:

   - What should I read? I tried reading some of the Racket Manifesto, but 
   I care much more about the systems evaluation parts of the implemnetation 
   for C. Namely:
      - Expressing Scheme types in C data structures 
      - Disjoint types as defined by some specification of Scheme
      - Garbage collection vs. reference counting (we are using C++11's 
      *std::shared_ptr* for now for reference counting)
      - Paradigms to storing and handling arbitrary lists and expressions
      - Parsing input from characters & type of algorithm used
   - What should be improved about the design of the C-based systems?
      - I am also looking at Chez Scheme. I've taken a look at Chibi as 
      well, but it's really quite hard to find the design bits in the comments 
      and documentation.
      - It's be great if I could find some presentations!
   
If you're gotten here, thank you for reading! We are a small group at the 
University of Hawaii, and we would be glad to receive any sort of advice or 
help!

Thank you,
Austin Tasato
UH Manoa Transpiler Project




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