private void EleminateDirectLeftRecursion(RuleStart strt)
{
string ElemStartTkn = "";
if (strt != null)
{
ElemStartTkn = FindUnusedToken(strt.GetToken());
}
while (strt != null)
{
if (IsRuleLeftRekursiv(strt))
{
RuleElement re = strt.GetNext();
if (re != null)
{
strt.SetNext(re.GetNext());
re = GotoLastRule(strt);
re.SetNext(new RuleToken(ElemStartTkn, strt));
strt.SetToken(ElemStartTkn);
}
BNFRule bnfRl = new BNFRule(m_Rules.Count);
bnfRl.SetStart(ElemStartTkn);
bnfRl.GetStart().SetNext(new RuleEpsilon(bnfRl.GetStart()));
m_Rules.Add(bnfRl);
}
else
{
RuleElement re = strt.GetNext();
if (re != null)
{
re = GotoLastRule(strt);
re.SetNext(new RuleToken(ElemStartTkn, strt));
}
}
strt = strt.GetAlternate();
}
}