public static void CorrectGrammar(Grammar grammar)
{
AddNewStartSymbolIfNeeded(grammar);
}
private static void AddNewStartSymbol(Grammar grammar)
{
grammar.StartSymbol = new NonTerminalSymbol("S'");
grammar.NonTerminals.Add(grammar.StartSymbol);
grammar.Rules.Add(new Rule(grammar.StartSymbol, Grammar.DefaultStartSymbol));
}