public override void CheckSemantics(Scope scope, List <SemanticError> errors)
{
//--------------------------------------------------
// Hacer 'CheckSemantics' A Los Dos Hijos.
//--------------------------------------------------
this.LeftOperandNode.CheckSemantics(scope, errors);
this.RightOperandNode.CheckSemantics(scope, errors);
//--------------------------------------------------
// Poner El Valor De Retorno De La Expresión A 'Error'
// Por Default.
//--------------------------------------------------
this.ExpressionType = PredefinedTypes.ErrorType;
//--------------------------------------------------
// Si Ha Ocurrido Un Error En Alguno De Los Hijos,
// Parar De Reportar Errores.
//--------------------------------------------------
if (this.LeftOperandNode.ExpressionType == PredefinedTypes.ErrorType ||
this.RightOperandNode.ExpressionType == PredefinedTypes.ErrorType)
{
return;
}
//--------------------------------------------------
// Comprobar Que Ambas Expresiones Devuelvan 'int'.
//--------------------------------------------------
bool IsOk = true;
if (this.LeftOperandNode.ExpressionType != PredefinedTypes.IntType)
{
IsOk = false;
errors.Add(SemanticError.InvalidUseOfBinaryArithmeticOperator(
this.OperatorName, "left", this.LeftOperandNode));
}
if (this.RightOperandNode.ExpressionType != PredefinedTypes.IntType)
{
IsOk = false;
errors.Add(SemanticError.InvalidUseOfBinaryArithmeticOperator(
this.OperatorName, "right", this.RightOperandNode));
}
if (IsOk)
{
this.ExpressionType = PredefinedTypes.IntType;
}
}
