wraithan / genfun.js

Prototype-friendly multiple dispatch for JavaScript.

Quickstart

genfun is hosted at Github.

var frobnicate = new Genfun();

Genfun.addMethod(
    frobnicate,
    [String.prototype, Number.prototype],
    function(string, number) {
        console.log("Got a string and a number");
    });

Genfun.addMethod(
    frobnicate,
    [Number.prototype, String.prototype],
    function(number, string) {
        console.log("Got a number and a string");
    });
    
frobnicate(new String("foo"), new Number(1));
frobnicate(new Number(1), new String("foo"));

Introduction

Prototype-friendly multiple dispatch

genfun is a library that provides multimethod/generic function capabilities in a prototype-friendly way. Inspired by Slate, CLOS and Sheeple.

Notes

Right now, genfun is mainly a proof of concept and porting of old Sheeple code. No real optimization has been done on dispatch, so you can expect it to crawl under any real strain. Once optimized, the system would ideally be just as fast as a singly-dispatched system when only one argument is specialized, while still providing the flexibility to dispatch on multiple arguments when desired.