CuLisp Interpreter

5 Nov 2017

A lisp-like expression evaluator.

Background

This started as a project where I wanted to write my own Lisp-like language. So far it's only able to evaluate simple expressions.

Building

• Run make

Usage

Typing ./build/culisp will spawn a REPL as shown below:

culisp>

To run the tests type ./build/culisp test

Examples

Adding two numbers together

(add 1 2)

Nesting function calls

(add (minus 10 5) 5)

If statement

(if (equal 1 2) (add 1 2) (minus 1 2))

If statement returning function name

((if (equal 1 1) add minus) 100 10)

Functions

• (add <int> <int>) returns <int>
• (minus <int> <int>) returns <int>
• (multiply <int> <int>) returns <int>
• (equal <a> <a>) returns <bool>
• (if <bool> <a> <a>) returns <a>
• (id <a>) returns <a>

Issues

• The program is incredibly prone to memory leaks
• CuLisp isn't actually a complete language since variables and functions can't be defined

License

MIT