streamlined harmony generators example based on https://gist.github.com/creationix/5544019

testgen._js

var fs = require('fs');

function testgen(_) {
  console.log(fs.readFile(__filename, _));
  console.log("Sleeping for 2000ms...");
  setTimeout(_, 2000);
  console.log("Done");  
}

testgen(_);

To test it with generators, you must:

• build and install node.js from andywingo's v8-3.19 branch: https://github.com/andywingo/node/tree/v8-3.19
• install latest streamline (v0.4.10)
• run the example with _node_harmony --generators testgen._js

To see the generated generators code, run _node_harmony --generators -c testgen._js. This will generate a testgen.js file that you can run with node --harmony.