private void EarleyReducer(EarleyItem completed, int setNumber)
{
int position = completed.GetOrignPosition();
EarleySet set = Sets[position];
List <EarleyItem> items = set.GetEarleyItemList();
for (int j = 0; j < items.Count; j++)
{
EarleyItem current = items[j];
Symbol next = current.GetCurrentNextSymbol();
if (next != null && next.Equals(completed.GetRule().GetLeftHandSideOfRule()))
{
EarleyItem newEarleyItem = new EarleyItem(
setNumber,
new DottedRule(current.GetRule(), current.GetRulePosition() + 1),
current.GetOrignPosition()
);
if (current.GetCurrentPrevSymbolList() != null && current.GetCurrentPrevSymbolList().Count > 0)
{
newEarleyItem.AddPredecessorLink(current, position);
}
newEarleyItem.AddReducerLink(completed, position);
AddToSet(newEarleyItem, setNumber, "EarleyReducer");
}
}
}
internal static void PrintSets(List <EarleySet> setsToPrint, bool all)
{
if (setsToPrint == null)
{
return;
}
for (int i = 0; i < setsToPrint.Count; i++)
{
Console.WriteLine("\n <=============================SET=================================> " + i);
EarleySet set = setsToPrint[i];
List <EarleyItem> items = set.GetEarleyItemList();
for (int k = 0; k < items.Count; k++)
{
EarleyItem e = items[k];
if (!all)
{
if (e.IsCompleted())
{
Console.WriteLine("\t\t" + e.ToString());
}
}
else
{
Console.WriteLine((e.IsCompleted() ? "\t\t" : "\t") + e.ToString());
}
}
Console.WriteLine("\n <--------> ");
List <LeoItem> transitiveItems = set.GetLeoItemList();
for (int k = 0; k < transitiveItems.Count; k++)
{
LeoItem e = transitiveItems[k];
Console.WriteLine(e.ToString());
}
Console.WriteLine("\n <=====================================================================> " + i);
}
}
private void RunMarpa(String input, int fromPosition)
{
for (int i = fromPosition; i <= input.Length; i++)
{
EarleySet set = Sets[i];
List <EarleyItem> items = set.GetEarleyItemList();
for (int j = 0; j < items.Count; j++)
{
EarleyItem current = items[j];
if (current.IsCompleted())
{
Completer(current, i);
}
else
{
bool condition = Grammar.DoesBelongToTerminals(current.GetCurrentNextSymbol());
if (!condition)
{
Predictor(current, i);
}
else if (input.Length > i)
{
Scanner(current, i, input[i]);
}
}
}
if (i + 1 < Sets.Count && Sets[i + 1].GetEarleyItemList().Count == 0)
{
errorHandler.AddNewError(ErrorCode.UNRECOGNISED_SYMBOL, input[i], i);
return;
}
}
}
