void ParseNum(out DirectValueSymbol res)
{
Expect(45);
Expect(5);
Expresion();
Expect(8);
var number = _symbolStack.Pop(); res = _varBuilder.NewVariable(Type.Decimal); DoParse(number, res);
}
/// <summary>
/// Builds commands so that the current value of an array is stored.
/// </summary>
/// <param name="array">Array to be accessed.</param>
/// <param name="recipient">Symbol where value will be stored.</param>
private void DoGetArrayValue(DirectValueSymbol array, DirectValueSymbol recipient)
{
var cmd = new Assign {
Recipient = recipient, Source = array
};
_currentScope.CommandList.Commands.Add(cmd);
}
/// <summary>
/// Builds a new Random command and adds it to current scope.
/// </summary>
/// <param name="result">Symbol where result will be stored.</param>
private void DoRandom(DirectValueSymbol result)
{
var cmd = new Random {
Result = result
};
_currentScope.CommandList.Commands.Add(cmd);
}
void Constante(out DirectValueSymbol sym)
{
sym = null;
if (la.kind == 3)
{
Get();
sym = _constBuilder.IntConstant(t.val);
}
else if (la.kind == 4)
{
Get();
sym = _constBuilder.DecConstant(t.val);
}
else if (la.kind == 46 || la.kind == 47)
{
Ctebol();
sym = _constBuilder.BoolConstant(t.val);
}
else if (la.kind == 2)
{
Get();
sym = _constBuilder.StrConstant(t.val);
}
else if (la.kind == 45)
{
ParseNum(out sym);
_currentScope.Add(sym);
}
else if (la.kind == 43)
{
Aleatorio();
sym = _varBuilder.NewVariable(Type.Decimal); DoRandom(sym); _currentScope.Add(sym);
}
else if (la.kind == 44)
{
Lectura();
sym = _varBuilder.NewVariable(Type.Cadena); DoRead(sym); _currentScope.Add(sym);
}
else if (FollowedByLPar())
{
Function function; List <DirectValueSymbol> parameters;
Funcion(out function, out parameters);
var result = _varBuilder.NewVariable(function.Type); DoFunction(function, parameters, result); sym = result; _currentScope.Add(sym);
}
else if (la.kind == 1)
{
Variable variable; List <DirectValueSymbol> indexes;
Variable(out variable, out indexes);
sym = variable; if (variable is VariableArray)
{
sym = _varBuilder.NewVariable(variable.Type); DoGetArrayValue(variable, sym); _currentScope.Add(sym);
}
}
else
{
SynErr(53);
}
}
/// <summary>
/// Updates a function object to include its return symbol.
/// </summary>
/// <param name="name">Name of the function to update.</param>
/// <param name="returns">The symbol with the return value.</param>
private void AddReturns(string name, DirectValueSymbol returns)
{
var function = _currentScope.Search(name) as Function;
if (function != null)
{
function.Returns = returns;
}
}
/// <summary>
/// Builds a new dibujarTriangulo command and adds it to current scope
/// </summary>
/// <param name="backgroundColor">Background color of the triangle</param>
/// <param name="lineColor">Line color of the triangle</param>
/// <param name="thickness">thickness of the triangle</param>
/// <param name="x1">coodinate</param>
/// <param name="y1">coodinate</param>
/// <param name="x2">coodinate</param>
/// <param name="y2">coodinate</param>
/// <param name="x3">coodinate</param>
/// <param name="y3">coodinate</param>
void DoTriangle(DirectValueSymbol backgroundColor, DirectValueSymbol lineColor, DirectValueSymbol thickness, DirectValueSymbol x1, DirectValueSymbol y1, DirectValueSymbol x2, DirectValueSymbol y2, DirectValueSymbol x3, DirectValueSymbol y3)
{
if (backgroundColor.Type != Type.Cadena)
{
SemErr("Error de tipos");
return;
}
else if (lineColor.Type != Type.Cadena)
{
SemErr("Error de tipos");
return;
}
else if (thickness.Type != Type.Entero)
{
SemErr("Error de tipos");
return;
}
else if (x1.Type != Type.Decimal && x1.Type != Type.Entero)
{
SemErr("Error de tipos");
return;
}
else if (y1.Type != Type.Decimal && y1.Type != Type.Entero)
{
SemErr("Error de tipos");
return;
}
else if (x2.Type != Type.Decimal && x2.Type != Type.Entero)
{
SemErr("Error de tipos");
return;
}
else if (y2.Type != Type.Decimal && y2.Type != Type.Entero)
{
SemErr("Error de tipos");
return;
}
else if (x3.Type != Type.Decimal && x3.Type != Type.Entero)
{
SemErr("Error de tipos");
return;
}
else if (y3.Type != Type.Decimal && y3.Type != Type.Entero)
{
SemErr("Error de tipos");
return;
}
var cmd = new Triangle {
BackgroundColor = backgroundColor, LineColor = lineColor, Thickness = thickness, X1 = x1, Y1 = y1, X2 = x2, Y2 = y2, X3 = x3, Y3 = y3
};
_currentScope.CommandList.Commands.Add(cmd);
}
/// <summary>
/// Builds a conditional command and adds it to the current scope.
/// </summary>
/// <param name="condition">The symbol containing the condition value.
/// </param>
/// <param name="ifBlock">Commands executed if condition is met.</param>
/// <param name="elseBlock">Commands to execute if false.</param>
private void DoIfElse(DirectValueSymbol condition, CommandList ifBlock, CommandList elseBlock)
{
var cmd = new Conditional
{
Condition = condition,
If = ifBlock,
Else = elseBlock
};
_currentScope.CommandList.Commands.Add(cmd);
}
/// <summary>
/// Does a parse command.
/// </summary>
/// <param name="str">Symbol with the string to parse.</param>
/// <param name="result">Symbol where parsed value will be stored.</param>
private void DoParse(DirectValueSymbol str, DirectValueSymbol result)
{
if (str.Type != Type.Cadena)
{
SemErr("El valor a convertir debe de ser una cadena.");
}
var cmd = new Parse {
Source = str, Recipient = result
};
_currentScope.CommandList.Commands.Add(cmd);
}
/// <summary>
/// Builds a new While command and adds it to current scope.
/// </summary>
/// <param name="expression">Commands to update the condition.</param>
/// <param name="result">Symbol where result of condition is stored.</param>
/// <param name="whileBlock">Commands to be executed in loop.</param>
private void DoWhile(CommandList expression, DirectValueSymbol result, CommandList whileBlock)
{
if (result.Type != Type.Booleano)
{
SemErr("Error de tipos");
return;
}
var cmd = new While {
Expression = expression, WhileBlock = whileBlock, Result = result
};
_currentScope.CommandList.Commands.Add(cmd);
}
/// <summary>
/// Builds a new dibujarArco command and adds it to current scope
/// </summary>
/// <param name="lineColor">Line color of the Arc</param>
/// <param name="thickness">thickness of the Arc</param>
/// <param name="x">Coordinate</param>
/// <param name="y">Coordinate</param>
/// <param name="width">Width of the Arc</param>
/// <param name="height">Height of the Arc</param>
/// <param name="startAngle">startAngle of the Arc</param>
/// <param name="finalAngle">startAngle of the Arc</param>
void DoArc(DirectValueSymbol lineColor, DirectValueSymbol thickness, DirectValueSymbol x, DirectValueSymbol y, DirectValueSymbol width, DirectValueSymbol height, DirectValueSymbol startAngle, DirectValueSymbol finalAngle)
{
if (lineColor.Type != Type.Cadena)
{
SemErr("Error de tipos");
return;
}
else if (thickness.Type != Type.Entero)
{
SemErr("Error de tipos");
return;
}
else if (x.Type != Type.Decimal && x.Type != Type.Entero)
{
SemErr("Error de tipos");
return;
}
else if (y.Type != Type.Decimal && y.Type != Type.Entero)
{
SemErr("Error de tipos");
return;
}
else if (width.Type != Type.Decimal && width.Type != Type.Entero)
{
SemErr("Error de tipos");
return;
}
else if (height.Type != Type.Decimal && height.Type != Type.Entero)
{
SemErr("Error de tipos");
return;
}
else if (startAngle.Type != Type.Entero)
{
SemErr("Error de tipos");
return;
}
else if (finalAngle.Type != Type.Entero)
{
SemErr("Error de tipos");
return;
}
var cmd = new Arc {
Color = lineColor, Thickness = thickness, X = x, Y = y, Width = width, Height = height, StartAngle = startAngle, FinalAngle = finalAngle
};
_currentScope.CommandList.Commands.Add(cmd);
}
/// <summary>
/// Builds a new dibujarRectangle command and adds it to current scope
/// </summary>
/// <param name="backgroundColor">Background color of the Rectangle</param>
/// <param name="lineColor">Line color of the Rectangle</param>
/// <param name="thickness">thickness of the Rectangle</param>
/// <param name="x">Coordinate</param>
/// <param name="y">Coordinate</param>
/// <param name="width">Width of the Rectangle</param>
/// <param name="height">Height of the Rectangle</param>
void DoRectangle(DirectValueSymbol backgroundColor, DirectValueSymbol lineColor, DirectValueSymbol thickness, DirectValueSymbol x, DirectValueSymbol y, DirectValueSymbol width, DirectValueSymbol height)
{
if (backgroundColor.Type != Type.Cadena)
{
SemErr("Error de tipos");
return;
}
else if (lineColor.Type != Type.Cadena)
{
SemErr("Error de tipos");
return;
}
else if (thickness.Type != Type.Entero)
{
SemErr("Error de tipos");
return;
}
else if (x.Type != Type.Decimal && x.Type != Type.Entero)
{
SemErr("Error de tipos");
return;
}
else if (y.Type != Type.Decimal && y.Type != Type.Entero)
{
SemErr("Error de tipos");
return;
}
else if (width.Type != Type.Decimal && width.Type != Type.Entero)
{
SemErr("Error de tipos");
return;
}
else if (height.Type != Type.Decimal && height.Type != Type.Entero)
{
SemErr("Error de tipos");
return;
}
var cmd = new Rectan {
BackgroundColor = backgroundColor, LineColor = lineColor, Thickness = thickness, X = x, Y = y, Width = width, Height = height
};
_currentScope.CommandList.Commands.Add(cmd);
}
/// <summary>
/// Builds a new dibujarLinea command and adds it to current scope
/// </summary>
/// <param name="lineColor">Line color of the Line</param>
/// <param name="thickness">thickness of the Line</param>
/// <param name="x1">Coordinate</param>
/// <param name="y1">Coordinate</param>
/// <param name="x2">Coordinate</param>
/// <param name="y2">Coordinate</param>
void DoLine(DirectValueSymbol lineColor, DirectValueSymbol thickness, DirectValueSymbol x1, DirectValueSymbol y1, DirectValueSymbol x2, DirectValueSymbol y2)
{
if (lineColor.Type != Type.Cadena)
{
SemErr("Error de tipos");
return;
}
else if (thickness.Type != Type.Entero)
{
SemErr("Error de tipos");
return;
}
else if (x1.Type != Type.Decimal && x1.Type != Type.Entero)
{
SemErr("Error de tipos");
return;
}
else if (y1.Type != Type.Decimal && y1.Type != Type.Entero)
{
SemErr("Error de tipos");
return;
}
else if (x2.Type != Type.Decimal && x2.Type != Type.Entero)
{
SemErr("Error de tipos");
return;
}
else if (y2.Type != Type.Decimal && y2.Type != Type.Entero)
{
SemErr("Error de tipos");
return;
}
var cmd = new Line {
Color = lineColor, Thickness = thickness, X1 = x1, Y1 = y1, X2 = x2, Y2 = y2
};
_currentScope.CommandList.Commands.Add(cmd);
}
void Bloque(string name, Variable[] parameters, bool isFunction, out DirectValueSymbol returns)
{
Expect(17);
CreateNewScope(name, new List <Variable>(parameters)); DoPushDefaults();
returns = null;
while (StartOf(3))
{
if (DoubleFollowedByLPar())
{
DeclaracionFunc();
}
else if (StartOf(2))
{
Declaracion();
}
else if (la.kind == 21)
{
Condicion();
}
else if (la.kind == 23)
{
Ciclo();
}
else if (la.kind == 25)
{
DrawLine();
}
else if (la.kind == 26)
{
DrawArc();
}
else if (la.kind == 27)
{
DrawRec();
}
else if (la.kind == 28)
{
DrawEllipse();
}
else if (la.kind == 29)
{
DrawTriangle();
}
else if (la.kind == 24)
{
Impresion();
}
else if (FollowedByLPar())
{
Function function; List <DirectValueSymbol> paras;
Funcion(out function, out paras);
Expect(9);
DoRoutine(function, paras);
}
else
{
Asignacion();
}
}
CheckFunctionsNoBody(); var hasReturn = false;
if (la.kind == 18)
{
Get();
Expresion();
Expect(9);
hasReturn = true; returns = _symbolStack.Pop(); _currentScope.Returns = returns;
}
Expect(19);
ValidateHasReturn(isFunction, hasReturn); DoPopLocals(); _currentScope = _currentScope.Parent;
}
/// <summary>
/// Builds a new CallFunction command and adds it to current scope.
/// </summary>
/// <param name="function">Function to be called</param>
/// <param name="parameters">Symbols that correspond to the parameters.
/// </param>
/// <param name="result">Symbol where result will be stored.</param>
private void DoFunction(Function function, List <DirectValueSymbol> parameters, DirectValueSymbol result)
{
if (function.Type == Type.Rutina)
{
SemErr("La función no tiene un valor de retorno.");
return;
}
for (var para = 0; para < parameters.Count; para++)
{
if (_cube[(int)function.Parameters[para].Type, (int)parameters[para].Type,
(int)Operator.Asignation] != function.Parameters[para].Type)
{
SemErr("Error de tipos");
return;
}
}
result.Type = function.Type;
var cmd = new CallFunction
{
Function = function,
ScopeCalled = _currentScope,
Result = result,
Parameters = parameters
};
_currentScope.CommandList.Commands.Add(cmd);
}
