As of 17th August 2022... I'm currently redesigning and rewriting MotherTode. Everything is broken and work-in-progress. For the old version, go to the legacy repo.

Follow the rewrite progress here!

MotherTode

MotherTode is a language that helps me to make languages. It's a language language.
For more info, check out the documentation.

How does it work?

Define your language by defining terms, like these:

let Expression = Number | String

let Greeting = {
    match "greeting"
    emit "Hello world!"
}

What does it look like?

This is a mini language that lets you add numbers (don't worry if you don't understand it yet):

match Number

let Number = Add | Literal
let Literal = /[0-9]/+
let Add = {
    match @(Number - Add) "+" @Number
    emit (left, right) => left + right
)

How do I use it?

You can embed it, like this:

<script src="mothertode-embed.js"></script>
<script>
	const language = MotherTode("emit (name) => `Hello ${name}!`")
	console.log(language("world")) //Hello world!
</script>

Or import it, like this:

import { MotherTode } from "./mothertode-import.js"
const language = MotherTode("emit (name) => `Hello ${name}!`")
console.log(language("world")) //Hello world!

Or use it from the command line, like this: