* a basic (non-hygienic) macro system and
* first-class continuations via `call-with-current-continuation`.
-In future, I plan to also implement a more complete numerical tower to
-bring it closer to [R5RS](http://www.schemers.org/Documents/Standards/R5RS/).
-
-The goal is for the interpreter to be complete enough to be used to complete
-the majority of the exercises found in [SICP](http://sarabander.github.io/sicp/).
-
Running the interpreter
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