/// <summary>
/// Will construct a definitive grammar from an input string, throw exception with compiler error otherwise.
/// Assumes first rule is the start symbol.
/// </summary>
/// <param name="input"></param>
public void setDefinitiveGrammar(String input)
{
bool noError = bnfParser.Parse(input);
if (noError)
{
// no start symbol specified, assume first entry
definitiveGrammar = new DefinitiveGrammar(bnfParser.Rules, bnfParser.Rules[0]);
visualisedGrammar = null;
}
else
{
throw new Exception(bnfParser.ErrorText);
}
}
private void buildVisualisedGrammar()
{
if (definitiveGrammar == null)
throw new Exception("You must set the definitive grammar first");
visualisedGrammar = new VisualisedGrammar(definitiveGrammar);
}
public void setDefinitiveGrammar(DefinitiveGrammar dg)
{
definitiveGrammar = dg;
visualisedGrammar = null;
}
public void setStartSymbol(string name)
{
NonterminalHeadD nont = definitiveGrammar.getNonterminal(name);
if (nont != null)
{
definitiveGrammar.setStartSymbol(nont);
}
else
throw new Exception("Could not find the Nonterminal from the name [" + name + "] given.");
visualisedGrammar = null;
}
