[Qt-interest] adding zero to QByteArray

[Thomas Dähling]

static_cast is your friend in such situations. The compiler complains
about ambiguity, just force the value to be treated as char by casting
it...

/Thomas

2009/5/28 Parker <userqt at gmail.com>:
> Hello all,
> I have another small newbie question here.
>
> I'm trying to add a integer zero value to QByteArray .
>
> QByteArray datagram;
>  datagram.push_front(0x0);
>
> datagram.push_front(0x1);
>
>
>
> But the first call generates an error. It seems it thinks 0 could be a null
> pointer ot something ? Any ideas how to put 0 in it ?
>
> I have to send some bytes trought the wire with UDP here.
>
>
>
>
> snmpsession.cpp: In member function `int
> SNMPSession::sendSetRequest(QByteArray&, QByteArray&, int)':
>
> snmpsession.cpp:77: error: call of overloaded `push_front(int)' is ambiguous
>
> d:/Qt/2009.02/qt/include/QtCore/../../src/corelib/tools/qbytearray.h:492:
> note: candidates are: void QByteArray::push_front(char)
>
> d:/Qt/2009.02/qt/include/QtCore/../../src/corelib/tools/qbytearray.h:494:
> note: void QByteArray::push_front(const char*)
>
> d:/Qt/2009.02/qt/include/QtCore/../../src/corelib/tools/qbytearray.h:496:
> note: void QByteArray::push_front(const QByteArray&)
>
> snmpsession.cpp:81: error: call of overloaded `push_front(int)' is ambiguous
>
> d:/Qt/2009.02/qt/include/QtCore/../../src/corelib/tools/qbytearray.h:492:
> note: candidates are: void QByteArray::push_front(char)
>
> d:/Qt/2009.02/qt/include/QtCore/../../src/corelib/tools/qbytearray.h:494:
> note: void QByteArray::push_front(const char*)
>
> d:/Qt/2009.02/qt/include/QtCore/../../src/corelib/tools/qbytearray.h:496:
> note: void QByteArray::push_front(const QByteArray&)
>
> snmpsession.cpp: In member function `void
> SNMPSession::convertOidAccordingToBER(QByteArray&)':
>
> snmpsession.cpp:121: warning: unused variable 'intValue'
>
> mingw32-make.exe[1]: *** [debug/snmpsession.o] Error 1
>
> D:\Qt\2009.02\mingw\bin\mingw32-make.exe: *** [debug] Error 2
>
> Exited with code 2.
>
> Error while building project DigiIP
>
> When executing build step 'Make'
>
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