Marie

About

This is a toy scripting programming language
You can also see example file here: example/test.mr

This one is still very much incomplete but JIT enabled version is here:
https://github.com/lechatthecat/marie/tree/feature/improve_performance

You can run test scripts by:

$ cargo run --quiet -- example/test.mr

This command is same for develop branch too.

Example

fn hello () {
    print("Hello World");
}
hello(); 

fn test (mut abc) {
    let test = "hey";
    print(test);
    print(abc);
}
test(1);

fn fib(n) {
  if (n < 2) return n;
  return fib(n - 1) + fib(n - 2);
}

let before = clock();
print(fib(15));
let after = clock();
print(after - before << "ms");

You can return values like in rust:

fn test() {
  "hey guys"
}

print(test());

Please note that you need "mut" for mutable variables.

fn test () {
    let mut test = "hey"; // here
    test = "hello"; 
    print(test);
}
test();

How instance is created:

class A {
    pub name = "john";
    pub weight = 10;
    pub fn f() {
        return "cat";
    }
}
let a = new A();
print(a.name);
print(a.f());

Please note that, if you don't use "pub", the properties automatically become private.

"+" cannot be used for String concatenation.
String concatenation is done like this:

fn test () {
    let myfrined = "john";
    let test = "hey, " << myfrined; // here
    print(test);
}
test();

Why? Well, isn't it annoying when string-type numbers are unintentionally concatenated when you want to calculate it?
Please run cargo test and see test cases for more examples.

How to use

$ git clone https://github.com/lechatthecat/marie.git
$ cd marie
$ cargo build --release
$ cargo run --quiet --release example/test.mr

For debug run, use

$ cargo run --quiet -- example/test.mr

or

$ cargo run --quiet -- --debug example/test.mr