error C2504: 'array_data' : base class undefined

[jili_baoer]

• 我在用C++ test 对.cpp文件build test时，就报C:\Qt\3.3.4\include\qbitarray.h(186) : error C2504: 'array_data' : base class undefined的错误，不知怎么解决呢！！
  qbitarray.h中
  #ifndef QBITARRAY_H
  #define QBITARRAY_H
  
  #ifndef QT_H
  #include "qstring.h"
  #endif // QT_H
  
  
  /*****************************************************************************
  QBitVal class; a context class for QBitArray::operator[]
  *****************************************************************************/
  
  class QBitArray;
  
  class Q_EXPORT QBitVal
  {
  private:
  QBitArray *array;
  uint index;
  public:
  QBitVal( QBitArray *a, uint i ) : array(a), index(i) {}
  operator int();
  QBitVal &operator=( const QBitVal &v );
  QBitVal &operator=( bool v );
  };
  
  
  /*****************************************************************************
  QBitArray class
  *****************************************************************************/
  
  class Q_EXPORT QBitArray : public QByteArray
  {
  public:
  QBitArray();
  QBitArray( uint size );
  QBitArray( const QBitArray &a ) : QByteArray( a ) {}
  
  QBitArray &operator=( const QBitArray & );
  
  uint size() const;
  bool resize( uint size );
  
  bool fill( bool v, int size = -1 );
  
  void detach();
  QBitArray copy() const;
  
  bool testBit( uint index ) const;
  void setBit( uint index );
  void setBit( uint index, bool value );
  void clearBit( uint index );
  bool toggleBit( uint index );
  
  bool at( uint index ) const;
  QBitVal operator[]( int index );
  bool operator[]( int index ) const;
  
  QBitArray &operator&=( const QBitArray & );
  QBitArray &operator|=( const QBitArray & );
  QBitArray &operator^=( const QBitArray & );
  QBitArray operator~() const;
  
  protected:
  struct bitarr_data : public QGArray::array_data {
  
  在qgarry.h中已经定义，且qstring.h中已经include“qgarry.h”
  #ifndef QGARRAY_H
  #define QGARRAY_H
  
  #ifndef QT_H
  #include "qshared.h"
  #endif // QT_H
  
  
  class Q_EXPORT QGArray // generic array
  {
  friend class QBuffer;
  public:
  // do not use this, even though this is public
  // ### make protected or private in Qt 4.0 beta?
  struct array_data : public QShared