#2 Compile problem with QString and std::string assignment

[Peter Eschler]

g++ -c -pipe -Wall -W -O2 -D_REENTRANT -fPIC
-DLINGUI_NO_NAMESPACE
-DQT_NO_DEBUG -DQT_THREAD_SUPPORT -DQT_PLUGIN
-DQT_SHARED
-I/usr/lib/qt/mkspecs/default -I. -I../gui -I../engine
-I/usr/lib/qt/include -I/usr/X11R6/include -o linguiplugin.o
linguiplugin.cpp
In file included from parameterui.h:29,
from floatparamdialui.h:25,
from linguiplugin.cpp:5:
paramtooltip.h: In member function `void
ParamToolTip::updateTip()':
paramtooltip.h:25: error: no match for 'operator=' in 't =
std::operator+(const
std::basic_string<_CharT, _Traits, _Alloc>&, const
std::basic_string<_CharT,
_Traits, _Alloc>&) [with _CharT = char, _Traits =
std::char_traits<char>,
_Alloc =

std::allocator<char>]
((&*(this->ParamToolTip::_param->ldrum::Parameter::_vptr.Parameter
+ 8)()))'
/usr/lib/qt/include/qstring.h:413: error: candidates are: QString&
QString::operator=(const QString&)
/usr/lib/qt/include/qstring.h:414: error: QString&
QString::operator=(const char*)
/usr/lib/qt/include/qstring.h:418: error: QString&
QString::operator=(const QCString&)
/usr/lib/qt/include/qstring.h:868: error: QString&
QString::operator=(QChar)
/usr/lib/qt/include/qstring.h:871: error: QString&
QString::operator=(char)
paramtooltip.h: In member function `virtual void
ParamToolTip::maybeTip(const
QPoint&)':
paramtooltip.h:35: error: no match for 'operator=' in 't =
std::operator+(const
std::basic_string<_CharT, _Traits, _Alloc>&, const
std::basic_string<_CharT,
_Traits, _Alloc>&) [with _CharT = char, _Traits =
std::char_traits<char>,
_Alloc =

std::allocator<char>]
((&*(this->ParamToolTip::_param->ldrum::Parameter::_vptr.Parameter
+ 8)()))'
/usr/lib/qt/include/qstring.h:413: error: candidates are: QString&
QString::operator=(const QString&)
/usr/lib/qt/include/qstring.h:414: error: QString&
QString::operator=(const char*)
/usr/lib/qt/include/qstring.h:418: error: QString&
QString::operator=(const QCString&)
/usr/lib/qt/include/qstring.h:868: error: QString&
QString::operator=(QChar)
/usr/lib/qt/include/qstring.h:871: error: QString&
QString::operator=(char)
linguiplugin.cpp: In member function `virtual bool
LinGuiPlugin::isContainer(const QString&) const':
linguiplugin.cpp:147: warning: unused parameter `const
QString&key'
make[3]: *** [linguiplugin.o] Error 1
make[2]: *** [ldrumwidgets] Error 2
make[1]: *** [all-recursive] Error 1
make: *** [all] Error 2

Can you help me ??

Here is what I have :

- Linux kernel 2.6.7 (Slackware 10.0)
- Qt 3.3.2
- Jack 0.98.1
- libsamplerate-0.1.1
- libsndfile-1.0.10