Method commuteRoot

src/jvm/clojure/lang/Var.java:300–307

(IFn fn)

}

synchronized public void commuteRoot(IFn fn) {
	Object newRoot = fn.invoke(root);
	validate(getValidator(), newRoot);
	Object oldroot = root;
	this.root = newRoot;
	++rev;
    notifyWatches(oldroot,newRoot);
}

synchronized public Object alterRoot(IFn fn, ISeq args) {
	Object newRoot = fn.applyTo(RT.cons(root, args));