strange delete occurance

[Qiieha]

Hi, I have a problem I don't understand the behaviour.

I have a slot and there a instantiate a QList<int*>*;

void Class::slot()
{
    QList<int>* list = new QList<int>();
    qDebug() << "list_adress: " << list; //i.e. 0x7fbc24034870 
    deleteList(list);
    qDebug() << "list_adress: " << list; // i expect 0x0, but output is 0x7fbc24034870 
}
 
void Class::deleteList(QList<int>* list)
{
    delete list;
    list = NULL;
}

void Class::slot()
{
    QList<int>* list = new QList<int>();
    qDebug() << "list_adress: " << list; //i.e. 0x7fbc24034870 
    deleteList(list);
    qDebug() << "list_adress: " << list; // i expect 0x0, but output is 0x7fbc24034870 
}

void Class::deleteList(QList<int>* list)
{
    delete list;
    list = NULL;
}

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Why pointer is not deleted in slot?
Please help me!!??

[wysota]

It is deleted. It's just not nulled, because you are nulling a copy of the pointer. And next time please post in the right forum, it is not a Qt issue.

[StrikeByte]

Try this:

void Class::slot()
{
  QList<int>* list = new QList<int>();
  qDebug() << "list_adress: " << list; //i.e. 0x7fbc24034870
  deleteList(&list);
  qDebug() << "list_adress: " << list; // i expect 0x0, but output is 0x7fbc24034870
}
 
void Class::deleteList(QList<int>** list)
{
  delete *list;
  *list = NULL;
}

void Class::slot()
{
  QList<int>* list = new QList<int>();
  qDebug() << "list_adress: " << list; //i.e. 0x7fbc24034870
  deleteList(&list);
  qDebug() << "list_adress: " << list; // i expect 0x0, but output is 0x7fbc24034870
}

void Class::deleteList(QList<int>** list)
{
  delete *list;
  *list = NULL;
}

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[Qiieha]

@wysota: sorry...and thanks