public static bool Contains <TItem>(this HashSet <TItem> source, TItem value, IEqualityComparer <TItem> comparer)
{
if (source == null)
{
CommonImplementation.ArgumentNull(nameof(source));
}
comparer = comparer ?? EqualityComparer <TItem> .Default;
var sameComparer = object.ReferenceEquals(source.Comparer, comparer);
if (sameComparer)
{
return(source.Contains(value));
}
// no need for bridge call, known to be non-null
var bridge = new IdentityEnumerable <TItem, HashSet <TItem>, HashSetBridger <TItem>, HashSetEnumerator <TItem> >(source);
if (comparer == null)
{
return(CommonImplementation.ContainsImpl <TItem, IdentityEnumerable <TItem, HashSet <TItem>, HashSetBridger <TItem>, HashSetEnumerator <TItem> >, HashSetEnumerator <TItem> >(ref bridge, value));
}
return(CommonImplementation.ContainsImpl <TItem, IdentityEnumerable <TItem, HashSet <TItem>, HashSetBridger <TItem>, HashSetEnumerator <TItem> >, HashSetEnumerator <TItem> >(ref bridge, value, comparer));
}
public static System.Collections.Generic.LinkedList <TItem> LinkedList <TItem, TConcat_IdentityBridgeType, TConcat_IdentityBridger, TConcat_IdentityEnumerator>(IdentityEnumerable <TItem, TConcat_IdentityBridgeType, TConcat_IdentityBridger, TConcat_IdentityEnumerator> second)
where TConcat_IdentityEnumerator : struct, IStructEnumerator <TItem>
where TConcat_IdentityBridger : struct, IStructBridger <TItem, TConcat_IdentityBridgeType, TConcat_IdentityEnumerator>
where TConcat_IdentityBridgeType : class
=> LinkedListImpl <TItem, IdentityEnumerable <TItem, TConcat_IdentityBridgeType, TConcat_IdentityBridger, TConcat_IdentityEnumerator>, TConcat_IdentityEnumerator>(ref second);