IO Request Serialization example

handler.js

// Handler for out
var handler = function(req) {
  switch(req) {
    "Just":
      var msg = req._0;
        switch(req.ctor) {
          "PutS": 
            process.stdout.write(req._0);
            break;
          "Exit":
            process.exit(req._0);
            break;
          "GetS":
            process.stdin.resume();
        }
  }
}

Request.elm

data Request = PutS String
             | Exit Int
             | GetS

port out : Signal (Maybe Request)