internal override CachingComparer <TElement> GetComparer(CachingComparer <TElement>?childComparer)
{
CachingComparer <TElement> cmp = childComparer == null
? new CachingComparer <TElement, TKey>(_keySelector, _comparer, _descending)
: new CachingComparerWithChild <TElement, TKey>(_keySelector, _comparer, _descending, childComparer);
return(_parent != null?_parent.GetComparer(cmp) : cmp);
}
public CachingComparerWithChild(Func <TElement, TKey> keySelector, IComparer <TKey> comparer, bool descending, CachingComparer <TElement> child)
: base(keySelector, comparer, descending)
{
_child = child;
}
public HackyHashSet(IEnumerable <T> coll, IEqualityComparer <T> comparer = null)
{
this.cachingComparer = new CachingComparer(comparer ?? EqualityComparer <T> .Default);
this.set = new HashSet <T>(coll, cachingComparer);
}