public GrammarNodeD AddAfter(NonterminalHeadD nonterminalHeadD, GrammarNodeV target, VADG.Global.SymbolType symbolType)
{
GrammarNodeDAddAfterVisitor visitor = new GrammarNodeDAddAfterVisitor();
visitor.Target = target.getReference();
visitor.SymbolType = symbolType;
visitor.visit(nonterminalHeadD);
return visitor.Item;
}
public GrammarNodeD AddBefore(NonterminalHeadD nonterminalHeadD, GrammarNodeV grammarNodeV, VADG.Global.SymbolType symbolType)
{
GrammarNodeDAddBeforeVisitor visitor = new GrammarNodeDAddBeforeVisitor();
visitor.Target = grammarNodeV.getReference();
visitor.SymbolType = symbolType;
visitor.visit(nonterminalHeadD);
return visitor.Item;
}
public GrammarNodeD Replace(GrammarNodeD itemToReplace, VADG.Global.SymbolType symbolType, string name)
{
OperationD parent = itemToReplace.Parent as OperationD;
if (parent == null)
throw new Exception("The item to replace does not have an operation D as a parent, fail.");
// the rule we are editing
NonterminalHeadD rule = itemToReplace.getMyRule();
if (rule == null)
throw new Exception("The item to replace could not find a nonterminalhead D associated with it.");
// remove old item
int index = parent.Children.IndexOf(itemToReplace);
parent.Children.Remove(itemToReplace);
itemToReplace.Dispose();
// create new item to add
GrammarNodeD newItem;
if (symbolType == VADG.Global.SymbolType.Terminal)
{
// create new Terminal
newItem = new TerminalD(name, parent);
}
else
{
// If the nont head doesn't exist, create and add to grammar
NonterminalHeadD nontHead = model.DefinitiveGrammar.getNonterminal(name);
if (nontHead == null)
nontHead = CreateNewNonterminal(name);
newItem = nontHead.CreateNonterminalTailD(parent);
}
// insert new item into parent
parent.insertChild(index, newItem);
return newItem;
}
