mini_co implementation

minico.js

function asyncRandom() {
  return function (fn) {
	setTimeout(function () {
      fn(Math.random());
    }, 10);    
  };
}

function *gen1() {
  var a = yield asyncRandom();
  var b = yield asyncRandom();
  console.log(a, b);
}

function *gen() {
  var a = yield asyncRandom();
  var b = yield asyncRandom();
  var c = yield asyncRandom();
  var d = yield 1;
  var e = yield gen1();
  var f = yield gen1();
  
  console.log(a, b, c, d);
}

function mco(generator) {
  var g = generator();
  
  (function moveNext(val) {
	var next = this.next(val);
    var that = this;
    if (!next.done) {
      var val = next.value;

      if (typeof val === 'function') {
        val(function (num) {
		  moveNext.call(that, num);
        });
      } else if (val.next) {
        val.__done = function () {
          moveNext.call(that);
        };
        moveNext.call(val);
      } else if (typeof val === 'object' || typeof val === 'number') {
      	moveNext.call(that, val);
      } 
    } else {
      that.__done && that.__done();
    }
  }).call(g);
}

mco(gen);