{"by":"brandonbloom","id":8924545,"kids":[8924865],"parent":8924337,"text":"1) I don't understand what this example is supposed to demonstrate.<p>2) By "power" I meant a formal notion of expressiveness: Neither feature expressions nor feature macros add anything to the language that you can't already express with existing constructs. Like I said: It's about affordances, not capability.","time":1421864758,"type":"comment"}