public Maybe <T> LookAhead(int index)
{
if (_Disposed)
{
throw new ObjectDisposedException("IEnumerator<T>");
}
if (LookAheadList.Count >= (index + 1))
{
return(LookAheadList[index].ToMaybe());
}
int itemsToEnumerate = (index + 1) - LookAheadList.Count;
for (int itemsEnumerated = 0; itemsEnumerated < itemsToEnumerate; itemsEnumerated++)
{
bool results = _InnerEnumerator.MoveNext();
if (results)
{
LookAheadList.Add(_InnerEnumerator.Current);
}
else
{
return(Maybe <T> .NoValue);
}
}
return(LookAheadList[index].ToMaybe());
}
public bool MoveNext()
{
if (_Disposed)
{
throw new ObjectDisposedException("IEnumerator<T>");
}
if (LookAheadList.Count <= 0)
{
bool results = _InnerEnumerator.MoveNext();
_Current = _InnerEnumerator.Current;
return(results);
}
_Current = LookAheadList[0];
LookAheadList.RemoveAt(0);
return(true);
}
