private void VisitComposite(CompositeParticle seq)
{
var stack = new Stack <ParticleConstraint>(seq.Reverse());
byte count = 0;
while (stack.Count > 0)
{
var item = stack.Pop();
if (item.ParticleType == ParticleType.Group && item is CompositeParticle group)
{
foreach (var child in group)
{
stack.Push(child);
}
}
else
{
_values.Push(ParticlePathItem.Create(seq, count));
count++;
Visit(item);
_values.Pop();
}
}
}
private void Visit(ElementParticle element)
{
var newValues = new ParticlePathItem[_values.Count];
_values.CopyTo(newValues, 0);
Array.Reverse(newValues);
var particlePath = ParticlePath.Create(newValues);
_path.Add(new LookupItem(element.ElementType, particlePath));
}