Async with generators

gen.js

// Tackling async events without
// callbacks using es6 generators
// http://kangax.github.io/compat-table/es6/#generators_(yield)
var async = function(parameters, callback) {
    setTimeout(function() {
        callback(parameters);
    }, 1000);
};

var currier = function(fn) {
    var args = Array.apply(null, arguments);
    args.shift()

    return function() {
        return fn.apply(this, args.concat(Array.apply(null, arguments)));
    };
}

var coroutine = function(generator) {
    var iterator;

    iterator = generator();

    var foward = function(response) {
        var state;

        state = iterator.next(response);

        if (!state.done) {
            state.value(foward);
        }
    }

    foward();
};

coroutine(function * () {
    var a = yield currier(async, 'a');
    var b = yield currier(async, 'b');
    var c = yield currier(async, 'c');
    console.log(a, b, c);
});