public static AbsType Search(Environment corrente, string simbolo)
{
if (corrente == null)
{
return(null);
}
AbsType type = SearchLocal(corrente, simbolo);
if (type == null)
{
type = Search(corrente.parent, simbolo);
}
return(type);
}
public ArrayType(AbsType type, int beginRange, int endRange) : base(EnumType.ARRAY)
{
ItemType = type;
BeginRange = beginRange;
EndRange = endRange;
}
public IdVar(string lexema, AbsType idType) : base(Tag.IDVAR)
{
Lexema = lexema;
IdType = idType;
}
public void Execute(Tag action, Stack <Tag> stk, Token tk, ref Environment env)
{
#region Sentenças Declarativas
if (action == Tag._Begin)
{
// Sinaliza o início de uma sentença imperativa
env.SentencaImperativa = true;
}
else if (action == Tag._End)
{
// Sinaliza o final de uma sentença imperativa
env.SentencaImperativa = false;
}
else if (action == Tag._CreateList)
{
List <object> list = new List <object>();
list.Add(((IdNew)tk).Lexema);
stk.ElementAt <Tag>(0).Inherited[0] = list;
}
else if (action == Tag._InsertList)
{
List <object> list = (List <object>)action.Inherited[0];
list.Add(((IdNew)tk).Lexema);
stk.ElementAt <Tag>(0).Inherited[0] = list;
}
else if (action == Tag._Integer)
{
stk.ElementAt <Tag>(0).Inherited[0] = new IntegerType();
// stk.ElementAt<Tag>(0).Inherited[0] = AbsType.IntegerType;
}
else if (action == Tag._Real)
{
stk.ElementAt <Tag>(0).Inherited[0] = new RealType();
// stk.ElementAt<Tag>(0).Inherited[0] = AbsType.RealType;
}
else if (action == Tag._BeginRange)
{
stk.ElementAt <Tag>(6).Inherited[2] = ((Integer)tk).Value;
}
else if (action == Tag._EndRange)
{
stk.ElementAt <Tag>(3).Inherited[1] = ((Integer)tk).Value;
}
else if (action == Tag._ArrayDec)
{
AbsType type = (AbsType)action.Inherited[0];
int rangeEnd = (int)action.Inherited[1];
int rangeBegin = (int)action.Inherited[2];
stk.ElementAt <Tag>(0).Inherited[0] = new ArrayType(type, rangeBegin, rangeEnd);
}
else if (action == Tag._IdVar)
{
stk.ElementAt <Tag>(2).Inherited[1] = action.Inherited[0];
}
else if (action == Tag._VarDec)
{
List <object> lexemas = (List <object>)action.Inherited[1];
AbsType type = (AbsType)action.Inherited[0];
foreach (string v in lexemas)
{
env.locals.Add(v, type);
}
}
else if (action == Tag._IdProc)
{
// Verificar se o identificador é novo
if (tk.tag != Tag.IDNEW)
{
throw new NotImplementedException("O Id deve ser novo!");
}
string lexema = ((IdNew)tk).Lexema;
// O contexto deve ser alterado logo antes dos parâmetros serem declarados
ProcType type = new ProcType(env, env.machine);
env.locals.Add(lexema, type);
env = type.Env;
stk.ElementAt <Tag>(1).Inherited[0] = lexema;
}
else if (action == Tag._IdFunc)
{
// Verificar se o identificador é novo
if (tk.tag != Tag.IDNEW)
{
throw new NotImplementedException("O Id deve ser novo!");
}
string lexema = ((IdNew)tk).Lexema;
// O contexto deve ser alterado logo antes dos parâmetros serem declarados
FuncType type = new FuncType(env, env.machine);
env.locals.Add(lexema, type);
env = type.Env;
stk.ElementAt <Tag>(3).Inherited[1] = lexema;
}
else if (action == Tag._ProcDec)
{
// Identificador do procedimento
string lexema = (string)action.Inherited[0];
ProcType type = (ProcType)Environment.SearchLocal(env.parent, lexema);
}
else if (action == Tag._FuncDec)
{
// Identificador da função
string lexema = (string)action.Inherited[1];
FuncType type = (FuncType)Environment.SearchLocal(env.parent, lexema);
type.ReturnType = (AbsType)action.Inherited[0];
}
else if (action == Tag._EndParList)
{
stk.ElementAt <Tag>(2).Inherited[1] = action.Inherited[0];
}
else if (action == Tag._ParDec)
{
foreach (string arg in (List <object>)action.Inherited[1])
{
env.parameters.Add(arg, (AbsType)action.Inherited[0]);
}
}
else if (action == Tag._EnvRestore)
{
IntermediateInstruction code = ic.CreateReturn();
// Console.WriteLine(code.ToString());
env.machine.AddInstruction(code);
env = env.parent;
}
else if (action == Tag._Args)
{
// Recebe a lista de argumentos do programa
foreach (string arg in (List <object>)action.Inherited[0])
{
env.parameters.Add(arg, AbsType.Untyped);
}
}
#endregion
#region Sentenças Imperativas
else if (action == Tag._Number)
{
stk.ElementAt <Tag>(0).Inherited[0] = Constant.Create(((Integer)tk).Value);
}
else if (action == Tag._RValue)
{
Address address = (Address)action.Inherited[0];
stk.ElementAt <Tag>(0).Inherited[0] = address;
}
else if (action == Tag._Not)
{
Name tmp = new Name();
IntermediateInstruction code = ic.CreateUnary(Operator.NOT, (Address)action.Inherited[0], tmp);
// Console.WriteLine(code.ToString());
env.machine.AddInstruction(code);
stk.ElementAt <Tag>(0).Inherited[0] = tmp;
}
else if (action == Tag._Skip1)
{
stk.ElementAt <Tag>(1).Inherited[0] = action.Inherited[0];
}
else if (action == Tag._FAddress) // Endereço da função
{
FuncType func = (FuncType)Environment.Search(env, ((IdFunc)tk).Lexema);
stk.ElementAt <Tag>(1).Inherited[1] = func;
}
else if (action == Tag._PAddress) // Endereço do procedimento
{
ProcType proc = (ProcType)Environment.Search(env, ((IdProc)tk).Lexema);
stk.ElementAt <Tag>(1).Inherited[1] = proc.Env.CodeAddress;
}
else if (action == Tag._FCall) // Chamada de função
{
// Destino
FuncType func = (FuncType)action.Inherited[1];
Label label = new Label(func.Env.CodeAddress);
// Número de argumentos
int n = (int)action.Inherited[0];
IntermediateInstruction code = ic.CreateCall(label, n);
// Console.WriteLine(code.ToString());
env.machine.AddInstruction(code);
stk.ElementAt <Tag>(0).Inherited[0] = func.Env.returnvalue;
}
else if (action == Tag._PCall) // Chamada de procedimento
{
// Destino
Label label = new Label((int)action.Inherited[1]);
// Número de argumentos
int n = (int)action.Inherited[0];
IntermediateInstruction code = ic.CreateCall(label, n);
// Console.WriteLine(code.ToString());
env.machine.AddInstruction(code);
}
else if (action == Tag._FirstActualPar) // Primeiro parâmetro atual
{
IntermediateInstruction code = ic.CreateParam((Address)action.Inherited[0]);
// Console.WriteLine(code.ToString());
env.machine.AddInstruction(code);
stk.ElementAt <Tag>(0).Inherited[0] = 1; // Primeiro parametro
}
else if (action == Tag._NextActualPar) // Próximo parâmetro atual
{
IntermediateInstruction code = ic.CreateParam((Address)action.Inherited[0]);
// Console.WriteLine(code.ToString());
env.machine.AddInstruction(code);
stk.ElementAt <Tag>(0).Inherited[0] = (int)action.Inherited[1] + 1;
}
else if (action == Tag._EndActualPar) // Lista de parâmetros atuais completa
{
stk.ElementAt <Tag>(1).Inherited[0] = (int)action.Inherited[0]; // Número de parâmetros
}
else if (action == Tag._NoArgs)
{
stk.ElementAt <Tag>(0).Inherited[0] = 0; // Não há parâmetros atuais
}
else if (action == Tag._AddOp)
{
if (((AddOp)tk).Value == '+')
{
stk.ElementAt <Tag>(1).Inherited[1] = Operator.ADD;
}
else // if (((AddOp)tk).Value == '-')
{
stk.ElementAt <Tag>(1).Inherited[1] = Operator.SUB;
}
}
else if (action == Tag._Add)
{
Address x = (Address)action.Inherited[2];
Operator op = (Operator)action.Inherited[1];
Address y = (Address)action.Inherited[0];
Name tmp = new Name();
IntermediateInstruction code = ic.CreateBinary(op, tmp, x, y);
// Console.WriteLine(code.ToString());
env.machine.AddInstruction(code);
stk.ElementAt <Tag>(0).Inherited[0] = tmp;
}
else if (action == Tag._MulOp)
{
if (((MulOp)tk).Value == '*')
{
stk.ElementAt <Tag>(1).Inherited[1] = Operator.MUL;
}
else // if (((MulOp)tk).Value == '/')
{
stk.ElementAt <Tag>(1).Inherited[1] = Operator.DIV;
}
}
else if (action == Tag._Mul)
{
Address x = (Address)action.Inherited[2];
Operator op = (Operator)action.Inherited[1];
Address y = (Address)action.Inherited[0];
Name tmp = new Name();
IntermediateInstruction code = ic.CreateBinary(op, tmp, x, y);
// Console.WriteLine(code.ToString());
env.machine.AddInstruction(code);
stk.ElementAt <Tag>(0).Inherited[0] = tmp;
}
else if (action == Tag._RelOp)
{
if (((RelOp)tk).Value == "<")
{
stk.ElementAt <Tag>(1).Inherited[1] = Operator.LT;
}
else if (((RelOp)tk).Value == "<=")
{
stk.ElementAt <Tag>(1).Inherited[1] = Operator.LE;
}
else if (((RelOp)tk).Value == ">")
{
stk.ElementAt <Tag>(1).Inherited[1] = Operator.GT;
}
else if (((RelOp)tk).Value == ">=")
{
stk.ElementAt <Tag>(1).Inherited[1] = Operator.GE;
}
else if (((RelOp)tk).Value == "=")
{
stk.ElementAt <Tag>(1).Inherited[1] = Operator.EQ;
}
else // if (((RelOp)tk).Value == "<>")
{
stk.ElementAt <Tag>(1).Inherited[1] = Operator.NEQ;
}
}
else if (action == Tag._Rel)
{
Address x = (Address)action.Inherited[2];
Operator op = (Operator)action.Inherited[1];
Address y = (Address)action.Inherited[0];
Name tmp = new Name();
IntermediateInstruction code = ic.CreateBinary(op, tmp, x, y);
// Console.WriteLine(code.ToString());
env.machine.AddInstruction(code);
stk.ElementAt <Tag>(0).Inherited[0] = tmp;
}
else if (action == Tag._Variable)
{
stk.ElementAt <Tag>(0).Inherited[0] = new Name(((IdVar)tk).Lexema);
}
else if (action == Tag._ToArray)
{
Name tmp = new Name();
Address y = (Address)action.Inherited[1];
Address i = (Address)action.Inherited[0];
IntermediateInstruction code = ic.CreateToArray(tmp, i, y);
// Console.WriteLine(code.ToString());
env.machine.AddInstruction(code);
stk.ElementAt <Tag>(1).Inherited[0] = tmp;
}
else if (action == Tag._FromArray)
{
Name tmp = new Name();
Address y = (Address)action.Inherited[1];
Address i = (Address)action.Inherited[0];
IntermediateInstruction code = ic.CreateFromArray(tmp, i, y);
// Console.WriteLine(code.ToString());
env.machine.AddInstruction(code);
stk.ElementAt <Tag>(1).Inherited[0] = tmp;
}
else if (action == Tag._LValue)
{
stk.ElementAt <Tag>(2).Inherited[1] = action.Inherited[0];
}
else if (action == Tag._Assign)
{
Address lValue = (Address)action.Inherited[1];
Address rValue = (Address)action.Inherited[0];
IntermediateInstruction code = ic.CreateCopy(lValue, rValue);
// Console.WriteLine(code.ToString());
env.machine.AddInstruction(code);
}
else if (action == Tag._RetAssign)
{
Address lValue = env.returnvalue;
Address rValue = (Address)action.Inherited[0];
if (lValue == null)
{
lValue = new Name();
}
IntermediateInstruction code1 = ic.CreateCopy(lValue, rValue);
// Console.WriteLine(code1.ToString());
env.machine.AddInstruction(code1);
env.returnvalue = lValue;
IntermediateInstruction code2 = ic.CreateRetVal(lValue); // ic.CreateCopy(lValue, rValue);
// Console.WriteLine(code2.ToString());
env.machine.AddInstruction(code2);
}
else if (action == Tag._IfExp)
{
IntermediateInstruction code1 = ic.CreateIfTrue((Address)action.Inherited[0], null);;
env.machine.AddInstruction(code1);
IntermediateInstruction code2 = ic.CreateGoto(null);
env.machine.AddInstruction(code2);
stk.ElementAt <Tag>(0).Inherited[0] = code1;
stk.ElementAt <Tag>(3).Inherited[0] = code2;
}
else if (action == Tag._Then)
{
((IntermediateInstruction)action.Inherited[0])[0].Arg2 = new Label(env.machine.Count);
// Console.WriteLine(action.Inherited[0].ToString());
}
else if (action == Tag._Else)
{
((IntermediateInstruction)action.Inherited[0])[0].Arg2 = new Label(env.machine.Count + 1);
// Console.WriteLine(action.Inherited[0].ToString());
IntermediateInstruction code = ic.CreateGoto(null);
env.machine.AddInstruction(code);
stk.ElementAt <Tag>(2).Inherited[0] = code;
}
else if (action == Tag._ExitIf)
{
Label exit = new Label(env.machine.Count + 1);
((IntermediateInstruction)action.Inherited[0])[0].Arg2 = exit;
// Console.WriteLine(action.Inherited[0].ToString());
IntermediateInstruction code = ic.CreateGoto(exit);
env.machine.AddInstruction(code);
}
else if (action == Tag._Loop)
{
Label loop = new Label(env.machine.Count);
stk.ElementAt <Tag>(5).Inherited[1] = loop;
}
else if (action == Tag._WhileExp)
{
IntermediateInstruction code1 = ic.CreateIfTrue((Address)action.Inherited[0], null);;
env.machine.AddInstruction(code1);
IntermediateInstruction code2 = ic.CreateGoto(null);
env.machine.AddInstruction(code2);
stk.ElementAt <Tag>(1).Inherited[0] = code1;
stk.ElementAt <Tag>(3).Inherited[0] = code2;
}
else if (action == Tag._Do)
{
((IntermediateInstruction)action.Inherited[0])[0].Arg2 = new Label(env.machine.Count);
// Console.WriteLine(action.Inherited[0].ToString());
}
else if (action == Tag._ExitWhile)
{
Label loop = (Label)action.Inherited[1];
IntermediateInstruction code = ic.CreateGoto(loop);
env.machine.AddInstruction(code);
((IntermediateInstruction)action.Inherited[0])[0].Arg2 = new Label(env.machine.Count);
// Console.WriteLine(action.Inherited[0].ToString());
}
else if (action == Tag._MainCode)
{
Environment.root.EntryPoint();
}
else if (action == Tag._Done)
{
// Insere uma instrução ret no final do código do programa.
IntermediateInstruction code = ic.CreateReturn();
// Console.WriteLine(code.ToString());
env.machine.AddInstruction(code);
string str = "program " + programName + " " + env.ToString();
Console.WriteLine(str);
Console.WriteLine("\nPRESSIONE UMA TECLA PARA CONTINUAR...");
Console.ReadKey();
}
#endregion
else if (action == Tag._ProgramName)
{
programName = ((IdNew)tk).Lexema;
}
else if (action == Tag._Echo)
{
stk.ElementAt <Tag>(0).Inherited[0] = action.Inherited[0];
}
else
{
throw new NotImplementedException("Não implementado!");
}
}