Brocket - A self-hosting and self-extensible (meta)class system for Javascript

Install

npm install Brocket

or for a global install

npm install -g Brocket

What is it?

Brocket aims to make OO programming in JavaScript (or Coffeescript) easier and more fun. It allows you to declare classes using a simple declarative DSL-ish syntax.

Under the hood, Brocket is based on a powerful meta-model. Every aspect of Brocket is itself a class, providing powerful introspection and extension features.

Brocket is a port of Perl's Moose.

Alpha Warning

This is an early version of Brocket. A lot of it isn't done. In particular, it is not yet self-bootstrapping, so you cannot extend Brocket by using Brocket-based classes (this will be coming in the future), and it does not provide any code generation features to make things faster.

In other words, it's incomplete and slow.

Synopsis

Creating a class with Brocket:

Brocket = require("Brocket");
Person = Brocket.makeClass( "Person", function (B) {
    B.has( "firstName", { access: "ro" } );
    B.has( "lastName",  { access: "ro" } );
    B.has( "age",       { access: "ro", default: 0 } );

    B.method( "greet", function () {
        console.log "Hi, my name is " + this.firstName() + ".";
    } );
} );

User = Brocket.makeClass( "User", function (B) {
    B.extends(Person);
    B.has( "username",  { access: "rw" } );
    B.has( "password",  { access: "rw" } );
    B.has( "lastLogin", { access: "rw" } );

    B.method( "login", function (password) {
        if ( password != this.password() ) {
            return false;
        }

        this.lastLogin( new Date );

        return true;
    } );
} );

bob = new User ( {
    firstName: "Bob",
    lastName:  "Smith",
    username:  "bob.smith",
    password:  "password"
} );

bob.greet()

if ( bob.login(password) ) {
    ....
}

Here's a class example in CoffeeScript

Brocket = require "Brocket"
Person = Brocket.makeClass "Person", (B) ->
    B.has "firstName", access: "ro"
    B.has "lastName",  access: "ro"
    B.has "age",       access: "ro", default: 0

    B.method "greet", ->
        console.log "Hi, my name is #{ @firstName() }."