public SetCollection difference([NotNull] params object[] /*!*/ sets)
{
Debug.Assert(sets != null);
if (sets.Length == 0)
{
return(copy());
}
SetStorage res = _items;
foreach (object set in sets)
{
if (ReferenceEquals(set, this))
{
return(Empty);
}
SetStorage items = SetStorage.GetItems(set);
if (ReferenceEquals(res, _items))
{
res = SetStorage.Difference(_items, items);
}
else
{
res.DifferenceUpdate(items);
}
}
Debug.Assert(!ReferenceEquals(res, _items));
return(Make(res));
}
public SetCollection difference(SetCollection set)
{
if (ReferenceEquals(set, this))
{
return(Empty);
}
return(Make(
SetStorage.Difference(_items, set._items)
));
}
public FrozenSetCollection difference([NotNull] FrozenSetCollection set)
{
if (object.ReferenceEquals(set, this))
{
return(Empty);
}
return(Make(
SetStorage.Difference(_items, set._items)
));
}
public SetCollection difference(object set)
{
return(Make(
SetStorage.Difference(_items, SetStorage.GetItems(set))
));
}
public SetCollection difference(FrozenSetCollection set)
{
return(Make(
SetStorage.Difference(_items, set._items)
));
}
