Mini Lisp

A simple Lisp interpreter written in Rust. It supports basic arithmetic operations, conditional expressions, and lambda functions.

Installation

You need to have Rust installed. If you don't have Rust, you can download it from the official Rust website: https://www.rust-lang.org/tools/install

Once you have it, you can clone the Mini Lisp repository from GitHub:

git clone https://github.com/joaofreires/mini-lisp.git

Usage

You can use the interactive shell:

$ cargo run
mini-lisp> (+ 1 2 3)
Number(6)

Or you can provide it with a Lisp file to evaluate. You can create a file called example.lisp with the following code:

(+ 1 2 3)

Then, you can run Mini Lisp by executing the following command in the terminal:

cargo run example.lisp

It will evaluate the code in example.lisp and print the result:

Syntax

It supports the following syntax:

Arithmetic operations

(+ 1 2 3)      ; 6
(- 5 2)        ; 3
(* 2 3 4)      ; 24
(/ 10 2)       ; 5.0

Conditional expressions

(if (= 2 2) "yes" "no") ; "yes"
(cond ((= 1 2) "no") ((= 2 2) "yes") (else "no")) ; "yes"
(and (> 2 1) (< 3 4)) ; true

Lambda functions

((lambda (x y) (+ x y)) 3 4) ; 7

Cons cell operations

(cons 1 2) ; (1 2)
(car (cons 1 2)) ; 1
(cdr (cons 1 2)) ; 2