public Return(ref Stack <StackElement> pila) : base()
{
pila.Pop();
pila.Pop(); //quita ;
pila.Pop();
exp = pila.Pop() as ValorRegresa; //quita expresion
pila.Pop();
pila.Pop(); //quita return
}
public string Analiza(string text)
{
l = new Lexical(text);
stack = new StringBuilder();
SyntacticalStack = new Stack <StackElement>();
int x = 0; //Fila
int y = 0; //Columna
int r = 0; //Resultado (regla, desplazamiento o aceptacion)
//int pops = 0; //Cantidad de elementos que produce la regla
bool error = false; //Bandera que detiene el ciclo
bool newSymbol = true; //Decide si se necesita un nuevo simbolo del Lexico o no
SyntacticalStack.Push(new State(0));
//StackElement Root = new StackElement()
Symbol currentSymbol = new Symbol();
while (!error)
{
if (newSymbol)
{
currentSymbol = l.NextSymbol();
DataGridViewRow row = new DataGridViewRow();
row.CreateCells(SymbolsTable);
row.Cells[0].Value = currentSymbol.value;
row.Cells[1].Value = currentSymbol.name;
row.Cells[2].Value = ((int)currentSymbol.type).ToString();
if (((int)currentSymbol.type) == -1)
{
foreach (DataGridViewCell cell in row.Cells)
{
cell.Style.BackColor = System.Drawing.Color.Red;
cell.Style.ForeColor = System.Drawing.Color.White;
}
error = true;
}
SymbolsTable.Rows.Add(row);
}
y = ((State)SyntacticalStack.Peek()).transicion;
x = (int)currentSymbol.type;
r = LRTable[y][x];
if (r > 0)
{
//Desplazamiento
SyntacticalStack.Push(new Terminal(currentSymbol));
SyntacticalStack.Push(new State(r));
newSymbol = true;
GeneratePrintedStack();
}
else if (r < 0) //Reglas
{
r = Math.Abs(r) - 1;
if (r == 0)
{
//Cadena Aceptada
break;
}
NonTerminal element = null;
switch (r)
{
case 1: //<programa> ::= <Definiciones>
element = new Programa(ref SyntacticalStack);
break;
case 2: //<Definiciones> ::= \e
element = new Definiciones();
break;
case 3: //<Definiciones> ::= <Definicion> <Definiciones>
element = new Definiciones(ref SyntacticalStack);
break;
case 4: //<Definicion> ::= <DefVar>
case 5: //<Definicion> ::= <DefFunc>
element = new Definicion(ref SyntacticalStack);
break;
case 6: //<DefVar> ::= tipo identificador <ListaVar> ;
element = new DefVar(ref SyntacticalStack);
break;
case 7: //<ListaVar> ::= \e
element = new ListaVar();
break;
case 8: //<ListaVar> ::= , id <ListaVar>
element = new ListaVar(ref SyntacticalStack);
break;
case 9: //<DefFunc> ::= tipo id ( <Parametros> ) <BloqFunc>
element = new DefFunc(ref SyntacticalStack);
break;
case 10: //<Parametros> ::= \e
element = new Parametros();
break;
case 11: //<Parametros> ::= tipo id <ListaParam>
element = new Parametros(ref SyntacticalStack);
break;
case 12: //R12 <ListaParam> ::= \e
element = new ListaParam();
break;
case 13: //<ListaParam> ::= , tipo id <ListaParam>
element = new ListaParam(ref SyntacticalStack);
break;
case 14: //<BloqFunc> ::= { <DefLocales> }
element = new BloqFunc(ref SyntacticalStack);
break;
case 15: //<DefLocales> ::= \e
element = new DefLocales();
break;
case 16: //<DefLocales> ::= <DefLocal> <DefLocales>
element = new DefLocales(ref SyntacticalStack);
break;
case 17: //<DefLocal> ::= <DefVar>
element = new DefLocal(ref SyntacticalStack);
break;
case 18: //<DefLocal> ::= <Sentencia>
element = new DefLocal(ref SyntacticalStack);
break;
case 19: //<Sentencias> ::= \e
element = new Sentencias();
break;
case 20: //<Sentencias> ::= <Sentencia> <Sentencias>
element = new Sentencias(ref SyntacticalStack);
break;
case 21: //<Sentencia> ::= identificador = <Expresion> ;
element = new Asignacion(ref SyntacticalStack);
break;
case 22: //<Sentencia> ::= if ( <Expresion> ) <SentenciaBloque> <Otro>
element = new If(ref SyntacticalStack);
break;
case 23: //<Sentencia> ::= while ( <Expresion> ) <Bloque>
element = new While(ref SyntacticalStack);
break;
case 24: //<Sentencia> ::= return <ValorRegresa> ;
element = new Return(ref SyntacticalStack);
break;
case 25: //<Sentencia> ::= <LlamadaFunc> ;
element = new SentenciaLLama(ref SyntacticalStack);
break;
case 26: //<Otro> ::= \e
element = new Otro();
break;
case 27: //<Otro> ::= else <SentenciaBloque>
element = new Otro(ref SyntacticalStack);
break;
case 28: //<Bloque> ::= { <Sentencias> }
element = new Bloque(ref SyntacticalStack);
break;
case 29: //<ValorRegresa> ::= \e
element = new ValorRegresa();
break;
case 30: //<ValorRegresa> ::= <Expresion>
element = new ValorRegresa(ref SyntacticalStack);
break;
case 31: //<Argumentos> ::= \e
element = new Argumentos();
break;
case 32: //<Argumentos> ::= <Expresion> <ListaArgumentos>
element = new Argumentos(ref SyntacticalStack);
break;
case 33: //<ListaArgumentos> ::= \e
element = new ListaArgumentos();
break;
case 34: //<ListaArgumentos> ::= , <Expresion> <ListaArgumentos>
element = new ListaArgumentos(ref SyntacticalStack);
break;
case 35: //<Termino> ::= <LlamadaFunc>
case 36: //<Termino> ::= identificador
case 37: //<Termino> ::= entero
case 38: //<Termino> ::= real
case 39: //<Termino> ::= cadena
element = new Termino(ref SyntacticalStack);
break;
case 40: //<LlamadaFunc> ::= identificador ( <Argumentos> )
element = new LlamadaFunc(ref SyntacticalStack);
break;
case 41: //<SentenciaBloque> ::= <Sentencia>
case 42: //<SentenciaBloque> ::= <Bloque>
element = new SentenciaBloque(ref SyntacticalStack);
break;
case 43: //<Expresion> ::= ( <Expresion> )
element = new Expresion(ref SyntacticalStack);
break;
case 44: //<Expresion> ::= opSuma <Expresion>
case 45: //<Expresion> ::= opNot <Expresion>
element = new Operacion1(ref SyntacticalStack);
break;
case 46: //<Expresion> ::= <Expresion> opMul <Expresion>
case 47: //<Expresion> ::= <Expresion> opSuma <Expresion>
case 48: //<Expresion> ::= <Expresion> opRelac <Expresion>
case 49: //<Expresion> ::= <Expresion> opIgualdad <Expresion>
case 50: //<Expresion> ::= <Expresion> opAnd <Expresion>
case 51: //<Expresion> ::= <Expresion> opOr <Expresion>
element = new Operacion2(ref SyntacticalStack);
break;
case 52: //<Expresion> ::= <Termino>
element = new Expresion(ref SyntacticalStack);
break;
default:
//pops = Rules.ElementAt(r - 1).TotalProductions;
//if (pops > 0)
//{
// while (pops > 0)
// {
// SyntacticalStack.Pop();
// SyntacticalStack.Pop();
// pops--;
// }
//}
break;
}
y = ((State)SyntacticalStack.Peek()).transicion;
x = element.columna;
SyntacticalStack.Push(element);
r = LRTable[y][x];
SyntacticalStack.Push(new State(r));
newSymbol = false;
GeneratePrintedStack();
Root = element;
}
else
{
error = true;
}
}
StringBuilder result = new StringBuilder();
if (error)
{
result.Append("Error en símbolo: " + currentSymbol.value + "\tLinea: " + currentSymbol.linea + "\r\n");
}
return(result.ToString());
}