Haxe enum pattern matching

gistfile1.hx

enum Tree<T> {
    Leaf(v :T);
    Node(l :Tree<T>, r :Tree<T>);
}

class Test {
    static function main() {
        var myTree = Node(
            Leaf("foo"), 
            Node(
                Leaf("bar"), 
                Leaf("foobar")));
        trace(match(myTree)); // 2
    }
    static function match(t) {
	    return switch(t) {
        	case Leaf(v): v;
        	case Node(v1, v2): match(v1) + ":" + match(v2);
          	case _: "3";
        }
    }
}