/// <summary>
/// Initializes new instance of Token Parser.
/// </summary>
/// <param name="dfa">DFA according to which this parser will parse the string</param>
public TokenParser(DFA dfa)
{
letterSet = dfa.LetterSet;
this.dfa = dfa;
}
/// <summary>
/// Initializes new instance of the DFA class
/// </summary>
/// <param name="letterSet">It is the list of letters which are included in the regular language</param>
public DFA(LettersSet letterSet)
{
this.letterSet = letterSet;
}
/// <summary>
/// Initializes new instance of Token Parser. Mainly used when this class is inherited to some other and the new class uses all letters into their regular language
/// </summary>
protected TokenParser()
{
letterSet = new LettersSet();
letterSet.AddLetters(0, 127); //add all ascii characters to the letter set
dfa = new DFA(letterSet); //add the letter set to the DFA
}