public LookAheadSet CreateFilter(LookAheadSet set)
{
LookAheadSet result = new LookAheadSet(_maxLength);
// Handle special cases
if (this.Size() <= 0 || set.Size() <= 0)
{
return(this);
}
// Create combinations
for (int i = 0; i < _elements.Count; i++)
{
var first = (Sequence)_elements[i];
for (int j = 0; j < set._elements.Count; j++)
{
var second = (Sequence)set._elements[j];
if (first.StartsWith(second))
{
result.Add(first.Subsequence(second.Length()));
}
}
}
return(result);
}
public LookAheadSet CreateCombination(LookAheadSet set)
{
LookAheadSet result = new LookAheadSet(_maxLength);
// Handle special cases
if (this.Size() <= 0)
{
return(set);
}
else if (set.Size() <= 0)
{
return(this);
}
// Create combinations
for (int i = 0; i < _elements.Count; i++)
{
var first = (Sequence)_elements[i];
if (first.Length() >= _maxLength)
{
result.Add(first);
}
else if (first.Length() <= 0)
{
result.AddAll(set);
}
else
{
for (int j = 0; j < set._elements.Count; j++)
{
var second = (Sequence)set._elements[j];
result.Add(first.Concat(_maxLength, second));
}
}
}
return(result);
}
