A little Scheme
This repository contains executable examples of the behaviour of a simple Scheme interpreter, adapted from The Little Schemer.
Each chapter’s examples are in a commit with an appropriate tag:
chapter-three and so on. To begin implementing the functionality for a particular chapter:
$ bundle install $ git checkout chapter-two $ bundle exec rspec
The examples expect to be able to instantiate a class called
LittleScheme::Parser and call its
parse method to get the abstract syntax tree (AST) of a program, and then to be able to instantiate a class called
LittleScheme::Evaluator and call its
evaluate method to evaluate that AST. If you run the examples, the failures should guide you.