racketx

Link to repository: https://github.com/jianxun-p/racketx

Brief

This project is a meant for learning purpose. After taking the course CS135, which I learned Racket, I was inspired by the concepts of functional programming and the essentials of Racket, so I started this project that allows me to write Racket code in Rust.

Macros

Macros and meta programming are considered one of the significant part of the Rust programming language, it avoids many repetitions of code and embeds Domain Specific Languages. I started off with using macro_rules, which provided extensive pattern matching capabilities, but it was not enough for this complicated task. As a solution, I turned towards using proc_macro. It was very powerful, yet, it consumes surprisingly more time to compile.

Example

Here is an example of using the racket macro.

extern crate racketx;
use racketx::racket;
pub fn main() {
    racket!{
        (define add_2_num (lambda (x y) (+ x y)))
        (define result (add_2_num 239 (- 9)))
    };
    assert_eq!(result, 230);
}

Features

• definition of constants
• lambda
• integer operations (+, -, *, /)
• negative integer (alternate solution: express with subtraction, e.g. -8 would be (- 8))
• non-integer
• conditional statements
• lists
• function definitions (alternate solution: use constants definition with lambda)
• modular arithmetic