awaito.js

// node --harmony_destructuring awaito.js

var process = require('process');
var fs = require('fs');
var http = require('http');

function run(generator){
  function resume(){
    var args = arguments;
    process.nextTick(function(){
      itr.next.apply(itr, [args]);
    });
  }
  var itr = generator(resume);
  itr.next();
}

function* main(resume){
  console.log("Starting main");
  var [res1] = yield add(1, resume);
  console.log("res1 =", res1);

  var [err, selfSource] = yield fs.readFile('awaito.js', resume);
  console.log("Got error:", err);
  console.log("Myself: {", selfSource.toString().substring(0, 80).replace(/\r|\n/g,""), "}");

  var req = http.get("http://www.google.com/", resume);
  var [res] = yield req;

  var body = "";
  res.on('data', (chunk) => body += chunk);
  var [nothing] = yield res.on('end', resume);
  console.log("It's google!:", body.toString().substring(0, 80));

}

function add(num, next){
  next(num + 1);
}

run(main);

Inspired by this http://stackoverflow.com/questions/32909789/why-does-generators-next-need-a-settimeout

feels monadic