/// <summary>
/// Creates a visualised grammar based on the definitive grammar passed.
/// </summary>
/// <param name="dGrammarIn"></param>
internal VisualisedGrammar(DefinitiveGrammar dGrammarIn)
{
// obsolete - using vistor pattern
//startSymbol = dGrammarIn.StartSymbol.CreateVisualGrammar(true);
// create visitor
GrammarNodeDCreateVisualVisitor visitor = new GrammarNodeDCreateVisualVisitor();
// traverse tree
dGrammarIn.StartSymbol.accept(visitor);
if (visitor.CurrentNodeV as NonterminalHeadV == null)
throw new Exception("Creating the visualised grammar from the definitive failed.");
startSymbol = (NonterminalHeadV)visitor.CurrentNodeV;
}
public void Expand()
{
if (IsExpanded)
throw new Exception("Cannot expand an expanded nonterminal tail V.");
GrammarNodeDCreateVisualVisitor visitor = new GrammarNodeDCreateVisualVisitor(level);
Reference.Reference.Rule.accept(visitor);
if (visitor.CurrentNodeV as ChoiceLineV == null)
throw new Exception("The node created in the visitor pattern returned null or is not of type ChoiceLineV");
else
rule = (ChoiceLineV)visitor.CurrentNodeV;
//rule = (ChoiceLineV)reference.Reference.Rule.CreateVisual(updateRef)
}
