public LookAheadSet CreateIntersection(LookAheadSet set)
{
LookAheadSet result = new LookAheadSet(_maxLength);
for (int i = 0; i < _elements.Count; i++)
{
var seq1 = (Sequence)_elements[i];
var seq2 = set.FindSequence(seq1);
if (seq2 != null && seq1.IsRepetitive())
{
result.Add(seq2);
}
else if (seq2 != null)
{
result.Add(seq1);
}
}
return(result);
}