public SymbolList SkipFirst()
{
SymbolList s = new SymbolList();
s.AddRange(this.Skip(1));
return(s);
}
public RuleProduction AddRule(int idSource, params Symbol[] destiny)
{
SymbolList sl = new SymbolList();
sl.AddRange(destiny);
return(AddRule(idSource, sl));
}
public Grammar()
{
Variables = new SymbolList();
Terminals = new SymbolList();
VariablesEmpty = new SymbolList();
Rules = new List <RuleProduction>();
VariableStart = new Symbol(1, "S", false);
}
public object Clone()
{
SymbolList symbols = new SymbolList();
foreach (var item in this)
{
symbols.Add(item.Copy());
}
return(symbols);
}
public Symbol GetExclusiveVars(SymbolList destiny)
{
var origens = Rules.Where(c => c.Destiny == destiny).Select(r => r.Source);
foreach (var origem in origens)
{
if (GetRules(origem.Name).Count == 1)
{
return(origem);
}
}
return(Symbol.EmptyVariable);
}
private void GenerateNewVars()
{
Normalized = new Grammar();
NewVariables = new SymbolList();
foreach (var item in simplified.Terminals)
{
int newId = GetNewId();
Symbol s = new Symbol(newId, string.Empty, false);
NewVariables.Add(s);
NewRoles.Add(Normalized.AddRule(newId, item));
DicVariablesTerminals.Add(item, s);
}
}
public SymbolList Replace(Symbol sym1, Symbol sym2)
{
SymbolList returns = new SymbolList();
returns.AddRange(this.Select(s => s.Copy()));
for (int i = 0; i < returns.Count; i++)
{
if (returns[i] == sym1)
{
returns[i] = sym2.Copy();
}
}
return(returns);
}
public SymbolList RemoveFirst(Symbol sym1)
{
SymbolList returns = new SymbolList();
returns.AddRange(this.Select(s => s.Copy()));
for (int i = 0; i < returns.Count; i++)
{
if (returns[i] == sym1)
{
returns.RemoveAt(i);
return(returns);
}
}
return(returns);
}
private void FillNewsNames()
{
NewNames = new Dictionary <Symbol, Symbol>();
SymbolList visitados = new SymbolList();
Queue <Symbol> variaveisAVisitar = new Queue <Symbol>();
variaveisAVisitar.Enqueue(simplified.VariableStart);
int i = 1;
NewNames.Add(simplified.VariableStart, new Symbol(GetNewId(), string.Format("A{0:000}", i), false));
visitados.Add(simplified.VariableStart);
while (variaveisAVisitar.Count > 0)
{
var variavelAtual = variaveisAVisitar.Dequeue();
List <RuleProduction> regrasAtuais = simplified.GetRules(variavelAtual);
foreach (var item in regrasAtuais)
{
foreach (var itemDestino in item.Destiny)
{
if (!itemDestino.Terminal && !visitados.Contains(itemDestino))
{
variaveisAVisitar.Enqueue(itemDestino);
i++;
NewNames.Add(itemDestino, new Symbol(GetNewId(), string.Format("A{0:000}", i), false));
visitados.Add(itemDestino);
}
}
}
}
Normalized = new Grammar();
Normalized.VariableStart = simplified.VariableStart;
Normalized.Variables.AddRange(simplified.Variables);
Normalized.Terminals.AddRange(simplified.Terminals);
Normalized.VariablesEmpty = simplified.VariablesEmpty;
for (i = 0; i < simplified.Rules.Count; i++)
{
Normalized.AddRule(simplified.Rules[i].Source, simplified.Rules[i].Destiny.Copy());
}
}
public RuleProduction AddRule(Symbol source, SymbolList destiny)
{
if (Rules.Count == 0)
{
VariableStart = source;
}
RuleProduction rule = Rules.FirstOrDefault(r => r.Destiny == destiny && r.Source == source && r.Pertinence == 1);
if (rule == null)
{
rule = new RuleProduction();
rule.Source = source;
rule.Destiny.AddRange(destiny.ToList());
rule.Pertinence = 1;
Rules.Add(rule);
}
return(rule);
}
private void FillVariablesAcessibleTerminals()
{
VariablesCallTerminals = new SymbolList();
for (int i = 0; i < GrammarNoUnitarianProductions.Variables.Count; i++)
{
Visited = new SymbolList();
Queue <Symbol> varsToVisit = new Queue <Symbol>();
varsToVisit.Enqueue(GrammarNoUnitarianProductions.Variables[i]);
while (varsToVisit.Count > 0)
{
Symbol variavelAtual = varsToVisit.Dequeue();
Visited.Add(variavelAtual);
List <RuleProduction> regrasAtuais = GrammarNoUnitarianProductions.Rules.Where(r => r.Source == variavelAtual).ToList();
foreach (var item in regrasAtuais)
{
if (item.DestinyContainsTerminal())
{
VariablesCallTerminals.Add(Source.Variables[i]);
varsToVisit.Clear();
break;
}
else
{
foreach (var itemDestino in item.Destiny)
{
if (!Visited.Contains(itemDestino))
{
varsToVisit.Enqueue(itemDestino);
}
}
}
}
}
}
}
public void FillTableEmpty()
{
VariablesEmpty = new SymbolList();
for (int i = 0; i < Source.Variables.Count; i++)
{
Visited = new SymbolList();
Queue <Symbol> variaveisAVisitar = new Queue <Symbol>();
variaveisAVisitar.Enqueue(Source.Variables[i]);
while (variaveisAVisitar.Count > 0)
{
Symbol variavelAtual = variaveisAVisitar.Dequeue();
Visited.Add(variavelAtual);
List <RuleProduction> regrasAtuais = Source.Rules.Where(r => r.Source == variavelAtual).ToList();
foreach (var item in regrasAtuais)
{
if (item.Destiny.Count == 1)
{
if (item.Destiny[0] == Symbol.EmptyTerminal)
{
VariablesEmpty.Add(Source.Variables[i]);
variaveisAVisitar.Clear();
break;
}
if (!item.Destiny[0].Terminal && !Visited.Contains(item.Destiny[0]))
{
variaveisAVisitar.Enqueue(item.Destiny[0]);
}
}
}
}
}
}
private void FillAcessibles(Grammar gramatica)
{
AcessiblesVariables = new SymbolList();
AcessiblesTerminals = new SymbolList();
Visited = new SymbolList();
Queue <Symbol> variaveisAVisitar = new Queue <Symbol>();
variaveisAVisitar.Enqueue(gramatica.VariableStart);
AcessiblesVariables.Add(gramatica.VariableStart);
while (variaveisAVisitar.Count > 0)
{
var variavelAtual = variaveisAVisitar.Dequeue();
Visited.Add(variavelAtual);
List <RuleProduction> regrasAtuais = gramatica.Rules.Where(r => r.Source == variavelAtual).ToList();
foreach (var item in regrasAtuais)
{
foreach (var itemDestino in item.Destiny)
{
if (itemDestino.Terminal)
{
if (!AcessiblesTerminals.Contains(itemDestino))
{
AcessiblesTerminals.Add(itemDestino);
}
}
else if (!Visited.Contains(itemDestino) && !AcessiblesVariables.Contains(itemDestino))
{
variaveisAVisitar.Enqueue(itemDestino);
AcessiblesVariables.Add(itemDestino);
}
}
}
}
}
private string[] SubstituiRegras(List <RuleProduction> regras)
{
List <string> retorno = new List <string>();
foreach (var item in regras)
{
var novoNome = item.Source;
if (NewNames.ContainsKey(item.Source))
{
novoNome = NewNames[item.Source];
}
SymbolList destino = item.Destiny.Copy();
foreach (var novos in NewNames)
{
destino = destino.Replace(novos.Key, novos.Value);
}
retorno.Add(string.Format("{0} => {1}", novoNome, destino));
}
return(retorno.ToArray());
}
public RuleProduction(Symbol source, SymbolList destiny, double pertinence = 1)
{
Source = source;
Destiny = destiny;
this.Pertinence = pertinence;
}
public RuleProduction()
{
Destiny = new SymbolList();
Pertinence = 0;
}
private void Normalize()
{
Normalized.VariableStart = simplified.VariableStart;
Normalized.Terminals.AddRange(simplified.Terminals);
Normalized.Variables.AddRange(simplified.Variables);
for (int i = 0; i < simplified.Rules.Count; i++)
{
RuleProduction rgActual = simplified.Rules[i];
var destiny = rgActual.Destiny;
foreach (var item in DicVariablesTerminals)
{
destiny = destiny.Replace(item.Key, item.Value);
}
if (destiny.Unitary)
{
Normalized.AddRule(rgActual.Source, destiny);
}
else
{
if (destiny.Count == 2 && !rgActual.DestinyContainsTerminal())
{
Normalized.AddRule(rgActual.Source, destiny);
}
else
{
List <SymbolList> destinys = new List <SymbolList>();
while (destiny.Count > 2)
{
destinys.Clear();
for (int k = 0; k < destiny.Count; k += 2)
{
if (k + 1 < destiny.Count)
{
destinys.Add(new SymbolList(destiny[k], destiny[k + 1]));
}
else
{
destinys.Add(new SymbolList(destiny[k]));
}
}
destiny = new SymbolList();
foreach (var des in destinys)
{
Symbol destinyVariable = des[0];
if (!des.Unitary)
{
destinyVariable = Normalized.GetExclusiveVars(des);
if (destinyVariable == Symbol.EmptyVariable)
{
destinyVariable = new Symbol(GetNewId(), string.Empty, false);
Normalized.Variables.Add(destinyVariable);
Normalized.AddRule(destinyVariable, des);
}
}
destiny.Add(destinyVariable);
}
}
Normalized.AddRule(rgActual.Source, destiny);
}
}
}
}
public SymbolList AddRange(SymbolList s)
{
base.AddRange(s);
return(this);
}
public RuleProduction AddRule(int idSource, SymbolList destiny)
{
return(AddRule(Variables.Find(idSource), destiny));
}
