Method assocEx

src/jvm/clojure/lang/PersistentTreeMap.java:116–124

(Object key, Object val)

}

public PersistentTreeMap assocEx(Object key, Object val) {
	Box found = new Box(null);
	Node t = add(tree, key, val, found);
	if(t == null)   //null == already contains key
		{
		throw Util.runtimeException("Key already present");
		}
	return new PersistentTreeMap(comp, t.blacken(), _count + 1, meta());
}

public PersistentTreeMap assoc(Object key, Object val){
	Box found = new Box(null);