public static bool Contains <TSource> (
this IReadOnlyFiniteSet <TSource> source,
TSource value,
IEqualityComparer <TSource> notUsed = null)
{
if (source == null)
{
throw new ArgumentNullException("source");
}
Contract.EndContractBlock();
return(source.Contains(value));
}
public static IReadOnlyFiniteSet <TSource> Except <TSource> (
this IReadOnlyFiniteSet <TSource> first,
IReadOnlyFiniteSet <TSource> second,
IEqualityComparer <TSource> notUsed = null)
{
if (first == null)
{
throw new ArgumentNullException("first");
}
if (second == null)
{
throw new ArgumentNullException("second");
}
Contract.EndContractBlock();
if ((first.Count < 1) || (second.Count < 1))
{
return(first);
}
if (first == second)
{
return(ReadOnlyList.EmptyReadOnlyList <TSource> .GetInstance());
}
// заранее считаем количество элементов
int count = first.Count;
if (first.Count < second.Count)
{
foreach (var item in first)
{
if (second.Contains(item))
{
count--;
}
}
}
else
{
foreach (var item in second)
{
if (first.Contains(item))
{
count--;
}
}
}
return(new ExceptReadOnlyFiniteSet <TSource> (first, second, count));
}
public bool Contains(TSource item)
{
return(_first.Contains(item) || _second.Contains(item));
}
public bool Contains(TSource item)
{
return(_source.Contains(item));
}
