qobject.h: remove hack that simulated decltype

In order to know the type of the arguments of a functor with compilers
not having decltype, it was simulated with an intermediary function.

Now that decltype is mandatory, we can remove this hack

Change-Id: I7eb283943abeeb4ef1c62358da89b0ede70b3ef5
Reviewed-by: Marc Mutz <marc.mutz@kdab.com>
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>

2 files changed, 2 insertions, 10 deletions

diff --git a/src/corelib/kernel/qobject.h b/src/corelib/kernel/qobject.h
index 64c5b58fd4..118316484b 100644
--- a/src/corelib/kernel/qobject.h
+++ b/src/corelib/kernel/qobject.h
@@ -293,7 +293,7 @@ public:
             connect(const typename QtPrivate::FunctionPointer<Func1>::Object *sender, Func1 signal, const QObject *context, Func2 slot,
                     Qt::ConnectionType type = Qt::AutoConnection)
     {
-#if defined (Q_COMPILER_DECLTYPE) && defined (Q_COMPILER_VARIADIC_TEMPLATES)
+#if defined (Q_COMPILER_VARIADIC_TEMPLATES)
         typedef QtPrivate::FunctionPointer<Func1> SignalType;
         const int FunctorArgumentCount = QtPrivate::ComputeFunctorArgumentCount<Func2 , typename SignalType::Arguments>::Value;
 
@@ -313,15 +313,7 @@ public:
         Functors with overloaded or templated operator() are only supported if the compiler supports
         C++11 variadic templates
       */
-#ifndef Q_COMPILER_DECLTYPE  //Workaround the lack of decltype using another function as indirection
-        return connect_functor(sender, signal, context, slot, &Func2::operator(), type); }
-    template <typename Func1, typename Func2, typename Func2Operator>
-    static inline QMetaObject::Connection connect_functor(const QObject *sender, Func1 signal, const QObject *context,
-                                                          Func2 slot, Func2Operator, Qt::ConnectionType type) {
-        typedef QtPrivate::FunctionPointer<Func2Operator> SlotType ;
-#else
         typedef QtPrivate::FunctionPointer<decltype(&Func2::operator())> SlotType ;
-#endif
         typedef QtPrivate::FunctionPointer<Func1> SignalType;
         typedef typename SlotType::ReturnType SlotReturnType;
         const int SlotArgumentCount = SlotType::ArgumentCount;
diff --git a/src/corelib/kernel/qobjectdefs_impl.h b/src/corelib/kernel/qobjectdefs_impl.h
index d5574a4dd1..dc445a426d 100644
--- a/src/corelib/kernel/qobjectdefs_impl.h
+++ b/src/corelib/kernel/qobjectdefs_impl.h
@@ -593,7 +593,7 @@ namespace QtPrivate {
     };
 #endif
 
-#if defined(Q_COMPILER_DECLTYPE) && defined(Q_COMPILER_VARIADIC_TEMPLATES)
+#if defined(Q_COMPILER_VARIADIC_TEMPLATES)
     /*
        Find the maximum number of arguments a functor object can take and be still compatible with
        the arguments from the signal.