public List <string> First(RegulaProductie alfa)
{
List <string> MFirst = new List <string>();
if (!Gramatica.Neterminale.Contains(alfa.Dreapta[0]))
{
if (alfa.Dreapta[0] != "~")
{
MFirst.Add(alfa.Dreapta[0]);
}
else
{
foreach (RegulaProductie regula in Gramatica.Reguli)
{
if (regula.Dreapta[regula.Dreapta.Count - 1] == alfa.Stanga)
{
MFirst.AddRange(Follow(regula.Stanga));
}
}
}
}
else
{
foreach (RegulaProductie regula in Gramatica.Reguli)
{
if (regula.Stanga == alfa.Dreapta[0])
{
MFirst.AddRange(First(regula));
}
}
}
return(MFirst);
}
public List <RegulaProductie> VerificaRecursivitateStanga(List <RegulaProductie> RegNeterm, string Neterminal)
{
List <RegulaProductie> ReguliNoi = new List <RegulaProductie>();
RegulaProductie RegulaRecursiva = null;
string neterminalu = new string(Neterminal.ToCharArray());
bool Recursivitate = false;
foreach (RegulaProductie temp in RegNeterm)
{
if (temp.Dreapta.First <string>() == Neterminal)
{
RegulaRecursiva = new RegulaProductie(temp.Dreapta, temp.Stanga);
Recursivitate = true;
RegNeterm.Remove(temp);
Reguli.Remove(temp);
break;
}
}
if (Recursivitate)
{
foreach (RegulaProductie temp in RegNeterm)
{
List <string> NouaDreapta = temp.Dreapta;
NouaDreapta.Add(Neterminal + $"{netcount}");
RegulaProductie regulanoua = new RegulaProductie(NouaDreapta, temp.Stanga);
ReguliNoi.Add(regulanoua);
}
if (RegulaRecursiva != null)
{
RegulaRecursiva.Dreapta.Remove(Neterminal);
RegulaRecursiva.Dreapta.Add(Neterminal + $"{netcount}");
RegulaRecursiva.Stanga += $"{netcount}";
ReguliNoi.Add(RegulaRecursiva);
neterminalu = Neterminal + $"{netcount}";
netcount++;
NeterminaleNoi.Add(neterminalu);
RegulaProductie Epsilon = new RegulaProductie($"{neterminalu} : ~");
ReguliNoi.Add(Epsilon);
}
return(ReguliNoi);
}
return(null);
}
public void Add(RegulaProductie regula)
{
Reguli.Add(regula);
}
public void Add(string line)
{
RegulaProductie temp = new RegulaProductie(line);
Reguli.Add(temp);
}
public List <RegulaProductie> VerificaInceputAsemanator(List <RegulaProductie> RegNeterm, string Neterminal)
{
List <RegulaProductie> ReguliNoi = new List <RegulaProductie>(RegNeterm);
List <RegulaProductie> ReguliAcelasiInceput = new List <RegulaProductie>();
string neterminalul = new string(Neterminal.ToCharArray());
List <string> AcelasiInceput = new List <string>();
for (int i = 0; i < ReguliNoi.Count - 1; i++)
{
AcelasiInceput.Clear();
RegulaProductie temp1 = ReguliNoi[i];
for (int j = i + 1; j < ReguliNoi.Count; j++)
{
RegulaProductie temp2 = ReguliNoi[j];
if (temp1.Stanga != temp2.Stanga)
{
break;
}
bool InceputAsemanator = false;
int length;
if (temp1.Dreapta.Count < temp2.Dreapta.Count)
{
length = temp1.Dreapta.Count;
}
else
{
length = temp2.Dreapta.Count;
}
List <string> dreaptatemp1 = new List <string>(temp1.Dreapta);
List <string> dreaptatemp2 = new List <string>(temp2.Dreapta);
for (int k = 0; k < length; k++)
{
if (dreaptatemp1[k] == dreaptatemp2[k])
{
AcelasiInceput.Add(dreaptatemp1[k]);
dreaptatemp1.RemoveAt(k);
dreaptatemp2.RemoveAt(k);
k--;
length--;
InceputAsemanator = true;
}
else
{
break;
}
}
if (InceputAsemanator == true)
{
neterminalul += $"{netcount}";
NeterminaleNoi.Add(neterminalul);
netcount++;
AcelasiInceput.Add(neterminalul);
ReguliNoi.Add(new RegulaProductie(AcelasiInceput, Neterminal));
ReguliNoi.Add(new RegulaProductie(dreaptatemp1, neterminalul));
ReguliNoi.Add(new RegulaProductie(dreaptatemp2, neterminalul));
ReguliNoi.Remove(temp1);
ReguliNoi.Remove(temp2);
i--;
break;
}
}
}
return(ReguliNoi);
}