ringojs instanceof

instanceoftest.js

var {Worker} = require("ringo/worker");

var Foo = function() { return this;}

function main() {
    var w = new Worker(module.id);
    w.postMessage(new Foo());
}

function onmessage(e) {
    print('instanceof?', e.data instanceof Foo);
}

if (require.main === module) {
    main();
}