QT_TR_NOOP doesnt work

I have this source:
File stringconstant.h

Code:

---

#include <QString>
#include <QStringList>
class StringConstant : public QObject
{
    Q_OBJECT
public:
    static const QStringList EXAMPLE_LIST;
};

---

File stringconstant.cpp

Code:

---

#include "stringconstant.h"
#include <QStringList>
const QStringList StringConstant::EXAMPLE_LIST = QStringList()   << QT_TR_NOOP("Hello")
                                                                        << QT_TR_NOOP("Mother")
                                                                        << QT_TR_NOOP("Father");

---

Problem is: when I run lupdate, the .ts file created, but it have nothing.
How can I fix this ?

QT_TR_NOOP is for use where the context of the string can be deduced (you were receiving a warning from lupdate regarding this). You should use QT_TRANSLATE_NOOP and specify a context.