your-moon / cecile

Cecile Programming Language

The Cecile Programming Language

⭐ Introduction

The Cecile, a little programming language designed for simplicity and flexibility.

🍎 Overview

Welcome to the Cecile programming language.

This language is part of my journey into learning compiler and interpreted languages. It's inspired by ajeetdsouza/loxcraft, a great Rust project that implemented the Lox language.

The syntax of Cecile is influenced by traditional programming languages like JavaScript, Go, and Rust, with a strong emphasis on developer experience, readability and ease-of-use.

Cecile is written in Rust. Some of performance matter part is written in Unsafe Rust that makes fast enough to compete with traditional interpreted languages like Javascript, Python.

Important note: This project is built for learning purposes. The code quality of this project is definitely not production ready.

📕 Features

Language features

• Interpreted
• Bytecode compiler
• Garbage collected in runtime
• Type Supported
• Basic types, Array
• Control flow statements
• Object Oriented Programming
• Stack tracing
• Repl

Ongoing features

• Online playground

---

For compiled version of Cecile

• Make compiled
• Self-hosted
• Standart library
• Module system

🔥 Syntax examples

Variable Declaration

// Variable Declaration
let number: int = 1;
let string: String = "string";

// Ofcource you don't need to write type everytime you declare variable
let number = 2;
let string = "hello cecile";

Function Declaration

fn say_hello() -> String {
  return "hello";
}

println say_hello() // Out: "hello"

Type Declaration

type Point {
  x: int,
  y: int,
}

impl Point {
  fn new(x: int, y: int) {
    self.x = x;
    self.y = y;
  }
}

let point: Point = Point();

Array & Builtin function

let arr = [1, 2, 3, 4];
arr.push(5);

println arr; // Out: [1, 2, 3, 4, 5]

⚙️️ Build Guide

🦀 Install Rust

We recommend installing Rust using rustup. You can install rustup as follows:

• macOS or Linux:

  curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh

• Windows (64-bit):

  Download the Windows 64-bit executable and follow the on-screen instructions.

🐙 Install Cecile

# Install 'Cecile'
$ cargo install Cecile --locked

Now to use Cecile language, in your terminal, run:

Cecile

cecile's Issues

Hindley-Milner's type system

Self keyword issue

when super calls, self should call superclass

type Doughnut;

type Cruller;

impl Doughnut {
    fn new() {
    }

    fn do(s: String) {
        println "Do something with doughnut";
    }
 
    fn finish(ingredient: String) {
        println "Finish with " + ingredient;
    }

    fn cook(s: String) {
        println "Dunk in the fryer.";
        self.do("fry");
    }

}


impl Cruller < Doughnut {
    fn new() {
    }
    
    fn do(s: String) {
        println "Do something with cruller";
    }

    fn finish(ingredient: String) {
        super.finish("icing");
    }
    
    fn cook(s: String) {
        super.cook("S");
    }

}

let crul = Cruller();
crul.finish("S");
crul.cook("S");