QByteArray doesn't accept 0x00.

PolywickStudio

I found a bug.

{
QByteArray ab;
ab.append(0x00); // error. Huh?
}

JonB

@PolywickStudio
Why do you think there is any bug (there won't be)? What does // error. Huh? mean, there is no error. I would guess whatever way you are trying to see/determine what ends up in your ab is incorrect, so state exactly what you do to "discover" this has "gone wrong"?

ChrisW67

This is what GCC gives me:

main.cpp: In function ‘int main(int, char**)’:
main.cpp:10:18: error: call of overloaded ‘append(int)’ is ambiguous
   10 |         ab.append(0x00);
      |         ~~~~~~~~~^~~~~~
In file included from /usr/include/x86_64-linux-gnu/qt5/QtCore/qstring.h:50,
                 from /usr/include/x86_64-linux-gnu/qt5/QtCore/qcoreapplication.h:44,
                 from /usr/include/x86_64-linux-gnu/qt5/QtCore/QCoreApplication:1,
                 from main.cpp:1:
/usr/include/x86_64-linux-gnu/qt5/QtCore/qbytearray.h:307:17: note: candidate: ‘QByteArray& QByteArray::append(char)’
  307 |     QByteArray &append(char c);
      |                 ^~~~~~
/usr/include/x86_64-linux-gnu/qt5/QtCore/qbytearray.h:309:17: note: candidate: ‘QByteArray& QByteArray::append(const char*)’
  309 |     QByteArray &append(const char *s);
      |                 ^~~~~~
/usr/include/x86_64-linux-gnu/qt5/QtCore/qbytearray.h:311:17: note: candidate: ‘QByteArray& QByteArray::append(const QByteArray&)’
  311 |     QByteArray &append(const QByteArray &a);
      |                 ^~~~~~
/usr/include/x86_64-linux-gnu/qt5/QtCore/qstring.h:1508:20: note: candidate: ‘QByteArray& QByteArray::append(const QString&)’
 1508 | inline QByteArray &QByteArray::append(const QString &s)
      |                    ^~~~~~~~~~

The compiler cannot tell what variation this call should match and does its best to be helpful.
Should it convert the int literal to char, a (null) pointer to a C-style string, a QString or QByteArray via their constructors?
Variations that match only one possibility:

        ab.append('\0');  // most traditional
        ab.append('\x00');
        ab.append(static_cast<char>(0x00));   // Yuck!

PolywickStudio

OK, my bad. thank you for the advice on using '\0' or '\x00';