TSI is originally based on the metacircular evaluator in SICP chapter 4, and it can run the metacircular evaluator. You can compare between tags to see how it grows.

Run interactive mode:

./main.py

Execute script:

./main.py script.scm

• call/cc
• no stack overflow in recursion call

• rational number
• quasiquote notation, # literals
• many primary procedures & some special forms