public bool TryRemove(TKey key, out ImmutableTreeMap <TKey, TValue> newMap)
{
Node newNode;
if (TryRemove(key, out newNode))
{
newMap = newNode == null ? Empty : new ImmutableTreeMap <TKey, TValue>(newNode);
return(true);
}
newMap = this;
return(false);
}
public bool TryAdd(TKey key, TValue value, out ImmutableTreeMap <TKey, TValue> newTreeMap)
{
Node newNode;
var couldAdd = TryAdd(key, value, out newNode, AddOperation.AddOnlyUnique);
if (!couldAdd)
{
newTreeMap = this;
return(false);
}
newTreeMap = new ImmutableTreeMap <TKey, TValue>(newNode);
return(true);
}