how to use >> operator serialize QValueList<T> to QDataStream?

[coralbird]

Below is the related instruction in qt.


QDataStream & operator<< ( QDataStream & s, const QValueList<T> & l )
This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
Writes a list, l, to the stream s. The type T stored in the list must implement the streaming operator.
QDataStream & operator>> ( QDataStream & s, QValueList<T> & l )
Reads a list, l, from the stream s. The type T stored in the list must implement the streaming operator.



I have realize >> operator in my "T", as below:

class CSysAlarm 
{
 
public:
    CSysAlarm(ENUM_INFO_TYPE infoType=COS_INFO);
    ~CSysAlarm();
    QDataStream&  operator <<( QDataStream& stream );
    // Attributes
public:
 
    ENUM_INFO_TYPE  m_enumInfoType;
    bool m_bIfAlarm;
    uint m_dwAlarmTimes;
    bool m_bAutoPrint;
    bool m_bIfPop;
    bool m_bIfLoop;
    bool m_bAllInfo;
    QString m_strPathFile;
 
public:
 
};

class CSysAlarm 
{

public:
    CSysAlarm(ENUM_INFO_TYPE infoType=COS_INFO);
    ~CSysAlarm();
    QDataStream&  operator <<( QDataStream& stream );
    // Attributes
public:
    
    ENUM_INFO_TYPE  m_enumInfoType;
    bool m_bIfAlarm;
    uint m_dwAlarmTimes;
    bool m_bAutoPrint;
    bool m_bIfPop;
    bool m_bIfLoop;
    bool m_bAllInfo;
    QString m_strPathFile;
    
public:

};

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And other code:

QFile file( "hmiset.bin" );
if(file.open(IO_WriteOnly )==false)
	return;
QDataStream stream( &file );

QFile file( "hmiset.bin" );
if(file.open(IO_WriteOnly )==false)
	return;
QDataStream stream( &file );

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How can I do this as title? thanks!