QByteArray - Ambiguous call to push_back???

[ebonnett]

Can anyone tell me why this line of code:

data.push_back(0x00);

causes this error:

The call to member function 'push_back' is ambiguous?

[VRonin]

This post is deleted!

[aha_1980]

Hi @ebonnett,

there are two overloads: http://doc.qt.io/qt-5/qbytearray.html#push_back-1 and http://doc.qt.io/qt-5/qbytearray.html#push_back-2

Your zero (0x00) can be converted to a char or a pointer, so the compiler don't know what to to.

If you want to append a char, use data.push_back(char(0x00)); Appending a nullpointer does not really makes sense, does it?!

Regards

[VRonin]

Because int can bind to multiple overloads of QByteArray::push_back you have to tell the compiler your byte constant is of type char and not the default int: data.push_back(char(0x00)); or data.push_back('\x00');

[ebonnett]

@aha_1980 That makes total sense. I did notice that when I cast 0x00 to char, it worked. I just didn't understand the reason. Thank you for the explanation!!!

[ebonnett]

@VRonin Thank you for the explanation!