I have a QList with a class, and have this error:

Qt Code: 
  1. C:/Qt4Examples/Matematica/calculadora.cpp:14: error: insufficient contextual information to determine type
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My class is:


Qt Code: 
  1. class ComplexData
  2. {
  3.  
  4. public:
  5.         ComplexData();
  6.         ComplexData(const ComplexData &);
  7.         virtual ~ComplexData();
  8.  
  9.         ComplexData &operator=(const ComplexData & );  // Right side is the argument.
  10.  
  11.         QString StrFuncao;
  12.         double real;
  13.         double imag;
  14.         ..............
  15.  
  16.          void SetNumero(double);
  17.         //void SetNumero(Complexo);
  18.         void SetNumero(double, double);
  19.         void SetNumeroVar(double);
  20.         .................
  21.  
  22. };
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My list, defined inside another class:

Qt Code: 
  1. ......
  2. private:
  3.           QList<ComplexData> Pilha();
  4. .......
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I get the errors with basic QList functions:

Qt Code: 
  1. ComplexData xx;
  2.  
  3.         Pilha.append(xx);
  4.        .......
  5.       Pilha.clear();
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Any ideas to solve this errors ?????

Thanks