Functions

Named function (block body)

fn greet name
  console.log[name]

Compiles to:

function greet(name) {
  console.log(name);
}

Named function (expression body)

fn double x to x mul 2

function double(x) {
  return x * 2;
}

Multiple parameters

Use ; to separate parameters:

fn add a; b
  return a add b

function add(a, b) {
  return a + b;
}

Anonymous functions

const double be fn x to x mul 2

const double = (x) => x * 2;

Async functions

async fn fetch-data url
  const res be await fetch[url]
  return res

async function fetchData(url) {
  const res = await fetch(url);
  return res;
}

Function calls

Use [] instead of ():

greet[///world///]
add[1; 2]
console.log[///hello///]

greet("world");
add(1, 2);
console.log("hello");

Type annotations (erased)

fn add a of Number; b of Number gives Number to a add b

Type annotations with of and gives are erased in the JavaScript output.

Return

fn get-value
  return 42