private MyArrayList GenerateFollowList(MyArrayList NonTerms)
{
MyArrayList Follows = new MyArrayList();
for (int i = 0; i < NonTerms.Count; i++)
{
RuleElement re = (RuleElement)NonTerms[i];
RuleStart rs = re.GetBegin();
BNFRule rl = rs.GetRuleConnect();
RuleElement nextRe = re.GetNext();
if (nextRe == null)
{
Follows = ParseHelper.UnionSet(Follows, rl.FollowSet);
}
else
{
if (nextRe.IsTerminal())
{
Follows.Add(nextRe);
}
else
{
RuleToken rt = (RuleToken)nextRe;
MyArrayList AllFirstSet = BetaTotalRuleFirstSet(rt);
Follows = ParseHelper.UnionSet(Follows, AllFirstSet);
if (!BetaTotalRuleEpsFree(rt))
{
Follows = ParseHelper.UnionSet(Follows, rl.FollowSet);
}
}
}
}
return(Follows);
}
public string GetAllElements()
{
RuleElement re = m_Next;
string Elements = "";
while (re != null)
{
if (re.GetToken().Length > 0)
{
if (re.IsTerminal())
{
Elements += "\'" + re.GetToken() + "\',";
}
else
{
Elements += re.GetToken() + ",";
}
}
else
{
Elements += " ,";
}
re = re.GetNext();
}
return(Elements);
}
protected bool BetaTotalRuleEpsFree(RuleElement re)
{
while (re != null)
{
if (re.IsTerminal())
{
return(true);
}
else
{
if (re.GetToken().Length > 0)
{
RuleToken rt = (RuleToken)re;
if (TotalRuleEpsFree(rt.GetConnected()))
{
return(true);
}
}
else
{
return(false);
}
}
re = re.GetNext();
}
return(false);
}
public static string ParseVerlaufArray2String(MyArrayList parseList)
{
string parseverlaufStr = "";
if (parseList != null)
{
for (int i = 0; i < parseList.Count; i++)
{
MyArrayList actStack = (MyArrayList)parseList[i];
if (actStack != null)
{
for (int j = 0; j < actStack.Count; j++)
{
RuleElement rl = (RuleElement)actStack[j];
if (rl.IsTerminal())
{
parseverlaufStr += "'" + rl.GetToken() + "'";
}
else
{
parseverlaufStr += rl.GetToken();
}
parseverlaufStr += " ";
}
}
parseverlaufStr += "\n";
}
}
return(parseverlaufStr);
}
protected MyArrayList BetaTotalRuleFirstSet(RuleElement re)
{
MyArrayList BetaFirst = new MyArrayList();
while (re != null)
{
if (re.IsTerminal())
{
BetaFirst.Add(re);
return(BetaFirst);
}
else
{
if (re.GetToken().Length > 0)
{
RuleToken rt = (RuleToken)re;
if (rt != null)
{
RuleStart conStr = GoToFirstStartRule(rt.GetConnected());
MyArrayList FirstSet = TotalRuleFirstSet(conStr);
BetaFirst = ParseHelper.UnionSet(BetaFirst, FirstSet);
if (TotalRuleEpsFree(rt.GetConnected()))
{
return(BetaFirst);
}
}
}
}
re = re.GetNext();
}
return(BetaFirst);
}
public string GetRuleString(RuleElement Start, int PntPos)
{
string res = Start.GetToken() + "->";
RuleElement iterator = Start.GetNext();
int Pos = 1;
while (iterator != null)
{
if (PntPos == Pos)
{
res += ".";
}
if (iterator.IsTerminal())
{
res += "'" + iterator.GetToken() + "'";
}
else
{
res += iterator.GetToken();
}
iterator = iterator.GetNext();
if (iterator != null)
{
res += ",";
}
Pos++;
}
if (PntPos == Pos)
{
res += ".";
}
res += ";";
return(res);
}
protected virtual MyArrayList GenerateFirstSet(RuleStart rs)
{
MyArrayList res = new MyArrayList();
RuleElement re = null;
if (rs != null)
{
re = rs.GetNext();
}
else
{
return(null);
}
while (re != null)
{
if (re.GetToken().Equals(""))
{
re = re.GetNext();
}
else
{
if (re.IsTerminal())
{
res.Add(re);
return(res);
}
else
{
RuleToken rt = (RuleToken)re;
RuleStart conStr = GoToFirstStartRule(rt.GetConnected());
MyArrayList res2 = null;
while (conStr != null)
{
res2 = GenerateFirstSet(conStr);
res = ParseHelper.UnionSet(res, res2);
conStr = conStr.GetAlternate();
}
if (TotalRuleEpsFree(rt.GetConnected()))
{
return(res);
}
else
{
re = re.GetNext();
}
}
}
}
return(res);
}
public MyArrayList GetAllTokens()
{
MyArrayList tokens = new MyArrayList();
RuleElement re = m_Next;
while (re != null)
{
if (!re.IsTerminal() && !re.GetToken().Equals(""))
{
tokens.Add(re);
}
re = re.GetNext();
}
return(tokens);
}
protected virtual bool RuleIsEpsilonFree(RuleStart rs)
{
RuleElement re = null;
if (rs != null)
{
re = rs.GetNext();
}
else
{
return(false);
}
while (re != null)
{
if (re.IsTerminal())
{
rs.GetRuleConnect().EpsilonFree = true;
return(true);
}
else
{
if (re.GetToken().Equals(""))
{
rs.GetRuleConnect().EpsilonFree = false;
return(false);
}
else
{
RuleToken rt = (RuleToken)re;
bool res = RuleIsEpsilonFree(rt.GetConnected());
if (res)
{
rs.GetRuleConnect().EpsilonFree = res;
return(res);
}
else
{
re = re.GetNext();
}
}
}
}
rs.GetRuleConnect().EpsilonFree = false;
return(false);
}
private int GetColPos(string col)
{
if (col != null)
{
for (int i = 0; i < m_Signs.Count; i++)
{
RuleElement re = (RuleElement)m_Signs[i];
if (re != null)
{
if (re.GetToken().Equals(col) && re.IsTerminal())
{
return(i);
}
}
}
}
return(-1);
}
public MyArrayList GetAllTerminals()
{
MyArrayList ts = new MyArrayList();
if (Start != null)
{
RuleElement pos = Start.GetNext();
while (pos != null)
{
if (pos.IsTerminal())
{
ts.Add(pos);
}
pos = pos.GetNext();
}
}
return(ts);
}
public ASTElement Parse(string Input)
{
Input += m_EofSign;
TerminalMatcher tm = new TerminalMatcher(Input, m_pt.Terminals);
RuleTerminal ReadTerminal = tm.GetNextTerminal();
while (ReadTerminal != null && !m_ps.IsEmpty && !ReadTerminal.Equals(m_EofSign))
{
string tmpVerlauf = ReadTerminal.GetToken() + " : " + m_ps.StackValues + "\n";
m_ParseVerlaufArray.Add(m_ps.StackArray);
m_ParseVarlauf += tmpVerlauf;
RuleElement re = m_ps.Pop();
if (re != null)
{
if (re.IsTerminal())
{
if (ReadTerminal.GetToken().Equals(re.GetToken()))
{
}
else
{
return(null);
}
ReadTerminal = tm.GetNextTerminal();
}
else if (re.GetToken().Length > 0 && ReadTerminal != null && ReadTerminal.GetToken().Length > 0)
{
RuleStart rs = m_pt.Get(ReadTerminal.GetToken(), re.GetToken());
if (rs == null)
{
return(null);
}
m_ps.Push(rs);
}
}
else
{
break;
}
}
return(m_ps.ASTRoot);
}
private void TraverseTree(ASTElement Node)
{
if (Node != null)
{
RuleElement re = Node.rlElement;
string Token = re.GetToken();
bool Terminal = re.IsTerminal();
ExecuteMethod(Token, Terminal);
ASTElement tmpAst = null;
int NodeNr = 0;
do
{
tmpAst = Node.GetNextNode(NodeNr);
TraverseTree(tmpAst);
NodeNr++;
}while(tmpAst != null);
}
}
public static string ParseVerlaufArray2String(MyArrayList parseList)
{
string parseverlaufStr = "";
if (parseList != null)
{
for (int i = 0; i < parseList.Count; i++)
{
MyArrayList actStack = (MyArrayList)parseList[i];
if (actStack != null)
{
for (int j = 0; j < actStack.Count; j++)
{
ButtomUpParseStack.buStackElement stkElm = (ButtomUpParseStack.buStackElement)actStack[j];
if (stkElm.IsRuleElement)
{
RuleElement rl = stkElm.GetRule;
if (rl.IsTerminal())
{
parseverlaufStr += "'" + rl.GetToken() + "'";
}
else
{
parseverlaufStr += rl.GetToken();
}
parseverlaufStr += " ";
}
else
{
// parseverlaufStr += stkElm.GetState.ToString();
// parseverlaufStr+=" ";
}
}
parseverlaufStr += "\n";
}
}
}
return(parseverlaufStr);
}
protected override void Closure(MyArrayList Huelle)
{
bool bChanged = true;
if (Huelle != null)
{
while (bChanged)
{
bChanged = false;
for (int i = 0; i < Huelle.Count; i++)
{
LR1Element LrElm = (LR1Element)Huelle[i];
RuleElement re = GetRuleElement(LrElm);
if (re != null && !re.IsTerminal() && re.GetToken().Length > 0)
{
RuleElement reLH = GetRuleElement(LrElm, m_LH);
MyArrayList FrstSet = null;
if (reLH == null)
{
FrstSet = LrElm.FirstSet;
}
else
{
FrstSet = BetaTotalRuleFirstSet(reLH);
if (!BetaTotalRuleEpsFree(reLH))
{
FrstSet = ParseHelper.UnionSet(FrstSet, LrElm.FirstSet);
}
}
if (FirstClosureFromRule(Huelle, re.GetToken(), FrstSet))
{
bChanged = true;
}
}
}
}
}
}
public string GetRuleString()
{
string res = Start.GetToken() + "->";
RuleElement iterator = Start.GetNext();
while (iterator != null)
{
if (iterator.IsTerminal())
{
res += "'" + iterator.GetToken() + "'";
}
else
{
res += iterator.GetToken();
}
iterator = iterator.GetNext();
if (iterator != null)
{
res += ",";
}
}
res += ".";
return(res);
}
protected virtual void Closure(MyArrayList Huelle)
{
bool bChanged = true;
if (Huelle != null)
{
while (bChanged)
{
bChanged = false;
for (int i = 0; i < Huelle.Count; i++)
{
LRElement LrElm = (LRElement)Huelle[i];
RuleElement re = GetRuleElement(LrElm);
if (re != null && !re.IsTerminal() && re.GetToken().Length > 0)
{
if (FirstClosureFromRule(Huelle, re.GetToken()))
{
bChanged = true;
}
}
}
}
}
}
protected override bool GenerateParseTable()
{
MyArrayList Terminals = GetAllTerminals();
Terminals.Add(new RuleTerminal(m_EofTerminal, null));
MyArrayList Tokens = GetDifStartTokens();
MyArrayList column = new MyArrayList();
for (int i = 0; i < Terminals.Count; i++)
{
RuleElement re = (RuleElement)Terminals[i];
column.Add(re);
}
for (int i = 0; i < Tokens.Count; i++)
{
RuleStart rs = (RuleStart)Tokens[i];
column.Add(rs);
}
m_bupt = new ButtomUpParseTabelle(column, Terminals, m_Huellen.Count);
for (int i = 0; i < m_GotoTable.Count; i++)
{
GotoEntry ge = (GotoEntry)m_GotoTable[i];
RuleElement re = ge.TokenSymbol;
if (re.IsTerminal())
{
ButtomUpParseTabelle.ActionEntry buptAE = new ButtomUpParseTabelle.ActionEntry(ButtomUpParseTabelle.Actions.SHIFT, ge.JumpToState);
m_bupt.Add(re, ge.ThisState, buptAE);
}
else
{
ButtomUpParseTabelle.ActionEntry buptAE = new ButtomUpParseTabelle.ActionEntry(ButtomUpParseTabelle.Actions.JUMP, ge.JumpToState);
m_bupt.Add(re, ge.ThisState, buptAE);
}
}
bool dblEntry = false;
for (int i = 0; i < m_Huellen.Count; i++)
{
MyArrayList ActHuelle = (MyArrayList)m_Huellen[i];
for (int j = 0; j < ActHuelle.Count; j++)
{
LRElement lrm = (LRElement)ActHuelle[j];
RuleElement re = GetRuleElement(lrm);
if (re == null)
{
BNFRule rl = (BNFRule)m_Rules[lrm.RulePos];
MyArrayList flws = rl.FollowSet;
if (flws != null)
{
for (int z = 0; z < flws.Count; z++)
{
RuleElement flw_re = (RuleElement)flws[z];
ButtomUpParseTabelle.ActionEntry buptAE = new ButtomUpParseTabelle.ActionEntry(ButtomUpParseTabelle.Actions.REDUCE, lrm.RulePos);
ButtomUpParseTabelle.ActionEntry ae = m_bupt.Get(flw_re, i);
if (ae == null)
{
m_bupt.Add(flw_re, i, buptAE);
}
else
{
if (ae.GetAction != ButtomUpParseTabelle.Actions.ACCEPT)
{
dblEntry = true;
}
}
}
if (rl.GetStart().GetToken().Equals(m_StartSign))
{
ButtomUpParseTabelle.ActionEntry buptAE = new ButtomUpParseTabelle.ActionEntry(ButtomUpParseTabelle.Actions.ACCEPT, lrm.RulePos);
m_bupt.Add(m_EofTerminal, i, buptAE);
}
}
}
}
}
return(!dblEntry);
}