/// <summary>
/// Adds a new item to the set, or does nothing if the item already exists.
/// </summary>
/// <param name="item">The item to add.</param>
/// <returns></returns>
public override ImmSortedSet <T> Add(T item)
{
var ret = Root.Root_Add(item, true, Comparer, false, Lineage.Mutable());
if (ret == null)
{
return(this);
}
return(ret.Wrap(Comparer));
}
public bool Add(T item)
{
var ret = _inner.Root_Add(item, true, _comparer, false, _lineage);
if (ret == null)
{
return(false);
}
_inner = ret;
return(true);
}
protected override ImmSortedMap <TKey, TValue> Set(TKey key, TValue value, bool overwrite)
{
var ret = Root.Root_Add(key, value, Comparer, overwrite, Lineage.Mutable());
if (ret == null && !overwrite)
{
throw Errors.Key_exists(key);
}
if (ret == null)
{
return(this);
}
return(ret.WrapMap(Comparer));
}
public bool Add(KeyValuePair <TKey, TValue> item)
{
_inner = _inner.Root_Add(item.Key, item.Value, _comparer, true, _lineage) ?? _inner;
return(true);
}