private void AddOperatorToPostFix(Stack <RegexElement> stack, RegexElement op)
{
while (stack.Count > 0 && op.CompareTo(stack.Peek()) <= 0)
{
_postFix.Add(stack.Pop());
}
stack.Push(op);
}
public void RemoveTransition(RegexElement re, Node node)
{
if (Transitions.ContainsKey(re.Value) && Transitions[re.Value].Contains(node))
{
if (Transitions[re.Value].Count > 1)
{
Transitions[re.Value].Remove(node);
}
else
{
Transitions.Remove(re.Value);
}
}
else
{
throw new Exception("Transition doesn't exist");
}
}
public void AddTransition(RegexElement re, Node node)
{
if (re == null && Transitions.ContainsKey(NFA.Null))
{
Transitions[NFA.Null].Add(node);
}
else if (re == null)
{
Transitions.Add(NFA.Null, new List <Node>(new Node[] { node }));
}
else if (Transitions.ContainsKey(re.Value))
{
Transitions[re.Value].Add(node);
}
else
{
Transitions.Add(re.Value, new List <Node>(new Node[] { node }));
}
}
