SchemeInterpreter

My scheme interpreter written in scala, to get a better understanding of the book Functional Programming in Scala, especially for the chapter 9 - Parser Combinators

Installation

git clone https://github.com/demonyangyue/SchemeInterpreter

Execution

Run Interactively

cd SchemeInterpreter
sbt run

//the programme will pause and wait for user input

> (+ 1 (+ 1 1))
3

> (define (fact x) (if (= x 0) 1 (* x (fact (- x 1)))))
null
> (fact 10)
3628800

Get Input from File

You can also put a collection of Scheme statements in a file, then evaluating them in a batch, for example:

sbt run < src/main/resources/input_file

Test

sbt test

Further Improvement

• Cover all the scheme interpreter statements
• More comprehensive error reporting