scala.lisp: A Toy LISP Interpreter in Scala.

This repository contains the source code for an extremely simple basis for a LISP interpreter in Scala.

Building Instructions

Prompt% scalac lisp.scala

Sample Output

Prompt% scala lisp
(1 . (2 . (3 . NIL)))
(NIL . NIL)
eq(a, a) ==> true
eq(a, b) ==> false
eq(b, b) ==> true
eq(a, d) ==> false
eq(d, e) ==> false
eq(d, d) ==> true
c ==> (1 . 2)
x ==> (print . (1 . NIL))
eval(x) ==> 1()
Prompt% 

Future Directions

At this point, the program is simply a toy proof-of-concept of embedding the primitives of a LISP-like language in a type-safe language like Scala.

• Adding a Read-Eval-Print loop would make it a "real" interactive interpreter.

• Adding data types (e.g., lambda) and primitive functions are needed to fill out the langauge.

License

This code is published under the MIT License (i.e., the "Expat License".) Please see the file LICENSE.

Enjoy!!