[tshaddox]

> As far as I understand classes are the only real way to get nominal typing in TypeScript.

Although classes and instances are ultimately structural, right?

    let foo = new Foo();
    assert(foo.constructor == Foo);

[chrismorgan]

foo.constructor actually doesn’t matter; foo.__proto__ == Foo.prototype is the one that actually makes things chug, and you can change the class of a value by changing its __proto__.

[thepaulmcbride]

Yep, you’re absolutely right