bool Factor(out List<List<Lr0Symbol>> symbolList)
{
symbolList = new List<List<Lr0Symbol>>();
bool result = true;
if (term(TokenType.Ident, false) || term(TokenType.String, false) || term(TokenType.Char, false)
|| term(TokenType.LEFTPAR, false) || term(TokenType.LEFTSQUARE, false) || term(TokenType.LEFTCURLY, false) || term(TokenType.SemAction, false))
{
do
{
if (term(TokenType.Ident, false) || term(TokenType.String, false) || term(TokenType.Char, false))
{
Lr0Symbol innerSymbol = new Lr0Symbol();
result = result && ParserSymbol(out innerSymbol);
if (term(TokenType.Attributes, false))
{
result = result && term(TokenType.Attributes, true);
}
List<Lr0Symbol> tempList = new List<Lr0Symbol>();
tempList.Add(innerSymbol);
symbolList.Add(tempList);
if (result)
{
form.appendText("Parsed TokenFactor \n");
}
return result;
}
if (term(TokenType.LEFTPAR, false))
{
result = result && term(TokenType.LEFTPAR, true)
&& Expression(out symbolList)
&& term(TokenType.RIGHTPAR, true);
if (result)
{
form.appendText("Parsed TokenFactor \n");
}
return result;
}
if (term(TokenType.LEFTSQUARE, false))
{
result = result && term(TokenType.LEFTSQUARE, true)
&& Expression(out symbolList)
&& term(TokenType.RIGHTSQUARE, true);
if (result)
{
form.appendText("Parsed TokenFactor \n");
}
return result;
}
if (term(TokenType.LEFTCURLY, false))
{
result = result && term(TokenType.LEFTCURLY, true)
&& Expression(out symbolList)
&& term(TokenType.RIGHTCURLY, true);
if (result)
{
form.appendText("Parsed TokenFactor \n");
}
return result;
}
if (term(TokenType.SemAction, false))
{
result = result && term(TokenType.SemAction, true);
if (result)
{
form.appendText("Parsed TokenFactor \n");
}
}
}
while (term(TokenType.Ident, false) || term(TokenType.String, false) || term(TokenType.Char, false)
|| term(TokenType.LEFTPAR, false) || term(TokenType.LEFTSQUARE, false) || term(TokenType.LEFTCURLY, false));
}
else
{
return false;
}
if (result)
{
form.appendText("Parsed TokenFactor \n");
}
return result;
}
bool ParserSymbol(out Lr0Symbol theSymbol)
{
theSymbol = new Lr0Symbol();
bool result = true;
if (term(TokenType.Ident, false) || term(TokenType.String, false) || term(TokenType.Char, false))
{
string currentString = tokenEnumerator.Current.getValue();
if (term(TokenType.Ident, false))
{
bool isToken = false;
foreach (LexerToken t in tokenDefinitions)
{
if (currentString == t.Identifier)
{
theSymbol = new Lr0Symbol(t.Identifier, t.Identifier);
isToken = true;
}
}
if (!isToken)
{
if (currentString == "$")
theSymbol = Lr0GenerationHelper.getEndSymbol();
else if (currentString == "3")
theSymbol = Lr0GenerationHelper.getEpsylonSymbol();
else
theSymbol = new Lr0Symbol(currentString);
}
result = result && term(TokenType.Ident, true);
if (result)
{
form.appendText("Parsed ParseSymbol \n");
}
return result;
}
if (term(TokenType.String, false))
{
string tmpString = LexerGenerationHelper.getStringValue(currentString);
if (tmpString == "$")
{
theSymbol = Lr0GenerationHelper.getEndSymbol();
}
else if (tmpString == "3")
{
theSymbol = Lr0GenerationHelper.getEpsylonSymbol();
}
else
{
List<LexerToken> oldDefinitions = new List<LexerToken>(tokenDefinitions);
tokenDefinitions = new List<LexerToken>();
LexerToken tmpToken = new LexerToken();
theSymbol = new Lr0Symbol(currentString);
tokenDefinitions.Add(new LexerToken(Lr0GenerationHelper.getSafeName(tmpString), tmpString));
foreach (LexerToken oldToken in oldDefinitions)
{
tokenDefinitions.Add(oldToken);
}
theSymbol = new Lr0Symbol(Lr0GenerationHelper.getSafeName(tmpString), tmpString);
}
result = result && term(TokenType.String, true);
if (result)
{
form.appendText("Parsed ParseSymbol \n");
}
return result;
}
if (term(TokenType.Char, false))
{
string tmpString = LexerGenerationHelper.getCharValue(currentString).ToString();
if (tmpString == "$")
{
theSymbol = Lr0GenerationHelper.getEndSymbol();
}
else if (tmpString == "3")
{
theSymbol = Lr0GenerationHelper.getEpsylonSymbol();
}
else
{
List<LexerToken> oldDefinitions = new List<LexerToken>(tokenDefinitions);
tokenDefinitions = new List<LexerToken>();
tokenDefinitions.Add(new LexerToken(Lr0GenerationHelper.getSafeName(tmpString), tmpString));
foreach (LexerToken oldToken in oldDefinitions)
{
tokenDefinitions.Add(oldToken);
}
theSymbol = new Lr0Symbol(Lr0GenerationHelper.getSafeName(tmpString), tmpString);
}
result = result && term(TokenType.Char, true);
if (result)
{
form.appendText("Parsed ParseSymbol \n");
}
return result;
}
}
else
{
return false;
}
return result;
}
public List<Item> GetGotoItems(Lr0Symbol theSymbol)
{
List<Item> ResultSet = new List<Item>();
foreach (Item Production in itemSet)
{
if (!Production.isFinal())
{
if (Production.getCurrentSymbol().Equals(theSymbol))
{
Item ItemToAdd = new Item(Production.Rule, Production.Position + 1);
ResultSet.Add(ItemToAdd);
}
}
}
return ResultSet;
}
