Double Latte

Python-like MRO based multiple inheritance for CoffeeScript.

Works with all javascript engines supported by CoffeeScript.

Example

{multiple, isinstance, issubclass} = require "double-latte"


class A
    constructor: ->
        console.log "A"


class B extends A
    constructor: ->
        console.log "B"
        super


class C extends A
    constructor: ->
        console.log "C"
        super


class D extends multiple B, C
    constructor: ->
        console.log "D"
        super


d = new D  # will print D; B; C; A;
isinstance d, B  # true

Install

npm install double-latte

FAQ

Q: Can I use this with <insert favorite compile-to-javascript language here> *

A: Probably not. This relies on the cls.__super__ property that CoffeeScript uses to figure out what parent to call. If your compiler does that, then maybe.

Q: How fast is this?

A: Fast enough ( Guido for president! ). If you're that worried about performance then you should probably code in javascript directly.

Q: What's the deal with isinstance?

A: For technical reasons, the instanceof operator doesn't work with classes that have multiple parents. The isinstance and issubclass are provided to work around this fact.