I just updated from Qt5 git and the following code results in compile error:
QTimer timer;
connect(&timer, &QTimer::timeout, [=](){});
Error resulted from clang 3.1:
/Qt/5.0/qtbase/include/QtCore/../../src/corelib/kernel/qobjectdefs_impl.h:395:13:
error: no matching function for call to object of type
'PageLogPanel::<lambda at ../../Dropbox/Client2012/PageLogPanel.cpp:47:36>'
f((*reinterpret_cast<typename RemoveRef<SignalArgs>::Type
*>(arg[I+1]))...), ApplyReturnValue<R>(arg[0]);
^
/Qt/5.0/qtbase/include/QtCore/../../src/corelib/kernel/qobjectdefs_impl.h:434:79:
note: in instantiation of member function
'QtPrivate::FunctorCall<QtPrivate::IndexesList<0>,
QtPrivate::List<QTimer::QPrivateSignal>, void, PageLogPanel::<lambda at
../../Dropbox/Client2012/PageLogPanel.cpp:47:36> >::call' requested here
FunctorCall<typename Indexes<N>::Value, SignalArgs, R,
Function>::call(f, arg);
^
/Qt/5.0/qtbase/include/QtCore/../../src/corelib/kernel/qobject_impl.h:193:17:
note: in instantiation of function template specialization
'QtPrivate::Functor<PageLogPanel::<lambda at
../../Dropbox/Client2012/PageLogPanel.cpp:47:36>,
1>::call<QtPrivate::List<QTimer::QPrivateSignal>, void>' requested here
FuncType::template call<Args,
R>(static_cast<QFunctorSlotObject*>(this_)->function, r, a);
^
/Qt/5.0/qtbase/include/QtCore/../../src/corelib/kernel/qobject_impl.h:202:71:
note: in instantiation of member function
'QtPrivate::QFunctorSlotObject<PageLogPanel::<lambda at
../../Dropbox/Client2012/PageLogPanel.cpp:47:36>, 1,
QtPrivate::List<QTimer::QPrivateSignal>, void>::impl' requested here
explicit QFunctorSlotObject(const Func &f) :
QSlotObjectBase(&impl), function(f) {}
^
/Qt/5.0/qtbase/include/QtCore/../../src/corelib/kernel/qobject.h:285:32:
note: in instantiation of member function
'QtPrivate::QFunctorSlotObject<PageLogPanel::<lambda at
../../Dropbox/Client2012/PageLogPanel.cpp:47:36>, 1,
QtPrivate::List<QTimer::QPrivateSignal>, void>::QFunctorSlotObject'
requested here
new QtPrivate::QFunctorSlotObject<Func2,
SignalType::ArgumentCount, typename SignalType::Arguments, typename
SignalType::ReturnType>(slot),
^
../../Dropbox/Client2012/PageLogPanel.cpp:47:2: note: in instantiation
of function template specialization 'QObject::connect<void
(QTimer::*)(), PageLogPanel::<lambda at
../../Dropbox/Client2012/PageLogPanel.cpp:47:36> >' requested here
connect(&timer, &QTimer::timeout, [=](){});
^
../../Dropbox/Client2012/PageLogPanel.cpp:47:36: note: candidate
function not viable: requires 0 arguments, but 1 was provided
connect(&timer, &QTimer::timeout, [=](){});
^
It seems
http://qt.gitorious.org/qt/qtbase/commit/dee57bc91080740201a0bf0b8c42eb374ee696f3
added QPrivateSignal to the signal signature?
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