public Sentencia DeclaracionesCPrima(Declaracion decl)
{
try
{
/*Cuando se declaran varias variables seguidas int x,t,y */
#region
if (currentToken.Tipo == Lexico.TipoToken.TK_COMA)
{
currentToken = lex.NextToken();
if (currentToken.Tipo != Lexico.TipoToken.TK_ID)
throw new Exception("Se esperaba un token ID");
Variable nombre = new Variable(currentToken.Lexema, null);
decl.Sig.Tip = decl.Tip;
decl.Sig.Var = nombre;
currentToken = lex.NextToken();
DeclCPrima(decl.Sig);
return decl;
}
#endregion
/*Declaracion de arreglos */
#region
else if (currentToken.Tipo == Lexico.TipoToken.TK_OPENCOR)
{
currentToken = lex.NextToken();
Expresiones E1 = Expression();
if (currentToken.Tipo != Lexico.TipoToken.TK_CLOSECOR)
throw new Exception("Se esperaba el token ] ");
currentToken = lex.NextToken();
Arreglo tipoArreglo = new Arreglo();
tipoArreglo.Contenido = decl.Tip;
tipoArreglo.Rangos.Add(E1);
DeclArreglo(tipoArreglo);
tipoArreglo.Dimensiones = tipoArreglo.Rangos.Count;
decl.Tip = tipoArreglo;
return decl;
}
#endregion
/*Declaracion de funciones */
#region
else if (currentToken.Tipo == Lexico.TipoToken.TK_OPENPAR)
{
currentToken = lex.NextToken();
Declaracion listaParams = FuncionesParams();
if (currentToken.Tipo != Lexico.TipoToken.TK_CLOSEPAR)
throw new Exception("Se esperaba el token )");
currentToken = lex.NextToken();
S_Functions declFuncion = new S_Functions();
declFuncion.Retorno = decl.Tip;
declFuncion.Var = decl.Var.id;
declFuncion.S = CompoundStatement();
if (listaParams != null)
declFuncion.Campo = listaParams;
return declFuncion;
}
#endregion
/*Declaracion de Structs */
#region
else if (currentToken.Tipo == Lexico.TipoToken.TK_OPENLLAVE)
{
currentToken = lex.NextToken();
Declaracion strDec = StructDeclaration();
Declaracion tmp = StructDeclaration();
while (tmp != null)
{
strDec.Sig = tmp;
tmp = StructDeclaration();
}
Structs s = new Structs();
s.nombre = decl.Var.id;
s.campos = strDec;
if (currentToken.Tipo != Lexico.TipoToken.TK_CLOSELLAVE)
throw new Exception("Error sintactico se esperaba }");
currentToken = lex.NextToken();
if (currentToken.Tipo != Lexico.TipoToken.TK_FINSENTENCIA)
throw new Exception("Error sintactico se esperaba ;");
currentToken = lex.NextToken();
return s;
}
#endregion
return decl;
}
catch (Exception ex)
{
throw ex;
}
}
Sentencia Statement()
{
try
{
switch (currentToken.Tipo)
{
case TipoToken.TK_IF:
currentToken = lex.NextToken();
return parseIf();
case TipoToken.TK_FOR:
currentToken = lex.NextToken();
return parseFor();
case TipoToken.TK_WHILE:
currentToken = lex.NextToken();
return parseWhile();
case TipoToken.TK_CASE:
currentToken = lex.NextToken();
return parseSwitch();
case TipoToken.TK_REPEAT:
currentToken = lex.NextToken();
return parseDo();
#region variable
case TipoToken.TK_VAR:
{
currentToken = lex.NextToken();
Declaracion ret = VariableDeclarationList();
if (currentToken.Tipo != TipoToken.TK_END)
throw new Exception("Se esperaba end.");
else
{
currentToken = lex.NextToken();
return ret;
}
}
#endregion
case TipoToken.TK_ID:
return parseAssignOrCall();
#region read/print
case TipoToken.TK_PRINT:
{
currentToken = lex.NextToken();
S_Print ret = new S_Print();
ret.Expr = Expr();
return ret;
}
case TipoToken.TK_READ:
{
currentToken = lex.NextToken();
if (currentToken.Tipo != TipoToken.TK_ID)
throw new Exception("Se esperaba identificador.");
else
{
S_Read ret = new S_Read();
ret.var = new Variable(currentToken.Lexema, AccessList(currentToken.Lexema));
return ret;
}
}
#endregion
#region Procedure
case TipoToken.TK_VOID:
{
currentToken = lex.NextToken();
if (currentToken.Tipo != TipoToken.TK_ID)
throw new Exception("Se esperaba ID");
else
{
S_Functions ret = new S_Functions();
ret.Retorno = new Voids();
ret.Var = currentToken.Lexema;
currentToken = lex.NextToken();
if (currentToken.Tipo != TipoToken.TK_OPENPAR)
throw new Exception("Se esperaba \"(\"");
else
{
currentToken = lex.NextToken();
ret.Campo = VariableDeclarationList();
if (currentToken.Tipo != TipoToken.TK_CLOSEPAR)
throw new Exception("Se esperaba\")\"");
else
{
currentToken = lex.NextToken();
ret.S = CodeBlock();
return ret;
}
}
}
}
#endregion
#region Function
case TipoToken.TK_FUNCTION:
{
currentToken = lex.NextToken();
if (currentToken.Tipo != TipoToken.TK_ID)
throw new Exception("Se esperaba ID");
else
{
S_Functions ret = new S_Functions();
ret.Var = currentToken.Lexema;
currentToken = lex.NextToken();
if (currentToken.Tipo != TipoToken.TK_OPENPAR)
throw new Exception("Se esperaba \"(\"");
else
{
currentToken = lex.NextToken();
ret.Campo = VariableDeclarationList();
if (currentToken.Tipo != TipoToken.TK_CLOSEPAR)
throw new Exception("Se esperaba\")\"");
else
{
currentToken = lex.NextToken();
if (currentToken.Tipo != TipoToken.TK_DOSPUNTOS)
throw new Exception("Se esperaba\":\"");
else
{
currentToken = lex.NextToken();
ret.Retorno = ParseType();
ret.S = CodeBlock();
return ret;
}
}
}
}
}
#endregion
#region type
case TipoToken.TK_TYPE:
{
currentToken = lex.NextToken();
TypeDef ret = TypeDeclarationList();
if (currentToken.Tipo != TipoToken.TK_END)
throw new Exception("Se esperaba end.");
else
{
currentToken = lex.NextToken();
return ret;
}
}
#endregion
#region break/continue/return
case TipoToken.TK_BREAK:
currentToken = lex.NextToken();
return new S_Break();
case TipoToken.TK_CONTINUE:
currentToken = lex.NextToken();
return new S_Continue();
case TipoToken.TK_RETURN:
{
currentToken = lex.NextToken();
S_Return ret = new S_Return();
ret.Expr = Expr();
return ret;
}
#endregion
default:
throw new Exception("Sentencia no reconocida.");
}
}
catch (Exception ex) { throw ex; }
}
public Sentencia DeclaracionesClase()
{
Declaracion Decl = new Declaracion();
VARTYPE();
try
{
Class c = new Class();
c.Nombre = currentToken.Lexema;
c.Campos = new T_Campos();
Decl.Tip = c;
currentToken = lex.NextToken();
}
catch (Exception ex)
{
throw ex;
}
if (currentToken.Tipo == TipoToken.TK_OPENCOR) //ARREGLO
{
int dim = arrayDimensions(1);
Arreglo ArrTip = new Arreglo();
ArrTip.Contenido = Decl.Tip;
ArrTip.Dimensiones = dim;
Decl.Tip = ArrTip;
if (currentToken.Tipo == TipoToken.TK_ID)
{
Decl.Var.id = currentToken.Lexema;
currentToken = lex.NextToken();
if (currentToken.Tipo == TipoToken.TK_FINSENTENCIA)
{
currentToken = lex.NextToken();
return Decl;
}
try
{
Decl = DeclOption(Decl);
}
catch (Exception ex)
{
throw ex;
}
if (currentToken.Tipo != TipoToken.TK_FINSENTENCIA)
{
currentToken = lex.NextToken();
return Decl;
}
else
{
throw new Exception("Error Sintactico - Se esperaba Fin Sentencia");
}
}
else
{
throw new Exception("Error Sintactico - Se esperaba un ID");
}
}
else if (currentToken.Tipo == TipoToken.TK_ID)
{
Decl.Var.id = currentToken.Lexema;
currentToken = lex.NextToken();
if (currentToken.Tipo == TipoToken.TK_COMA || currentToken.Tipo == TipoToken.TK_ASSIGN)
{
try
{
DeclaracionesVarias(Decl);
DeclOption(Decl);
}
catch (Exception ex)
{
throw ex;
}
}
else if (currentToken.Tipo == TipoToken.TK_OPENPAR)
{
currentToken = lex.NextToken();
S_Functions sFunctions = new S_Functions();
sFunctions.Retorno = Decl.Tip;
sFunctions.Var = Decl.Var.id;
try
{
sFunctions.Campo = ParameterList();
}
catch (Exception ex)
{
throw ex;
}
if (currentToken.Tipo == TipoToken.TK_CLOSEPAR)
{
currentToken = lex.NextToken();
try
{
sFunctions.S = CompoundStatement();
}
catch (Exception ex)
{
throw ex;
}
return sFunctions;
}
else
{
throw new Exception("Error Sintactico - Se esperaba simbolo )");
}
}
else if (currentToken.Tipo == TipoToken.TK_OPENLLAVE)
{
currentToken = lex.NextToken();
S_Class sClass = new S_Class();
sClass.Var.id = Decl.Var.id;
try
{
sClass.CamposClase = ListaDeclaracion(sClass.CamposClase);
}
catch (Exception ex)
{
throw ex;
}
if (currentToken.Tipo != TipoToken.TK_CLOSELLAVE)
throw new Exception("Error Sintactico - Se esperaba simbolo }");
currentToken = lex.NextToken();
return sClass;
}
else if (currentToken.Tipo == TipoToken.TK_FINSENTENCIA)
{
currentToken = lex.NextToken();
return Decl;
}
else
throw new Exception("Error Sintactico - Se esperaba simbolo ;");
}
return Decl;
}