Split qobject_impl.h into qobjectdefs_impl.h

This is done to make QtPrivate::FunctionPointer available to the
QMetaMethod declaration in qmetaobject.h (which already included
qobjectdefs.h, since that's where QMetaObject is declared), so that
the new template-based QMetaMethod::fromSignal() function may be
implemented.

The logic for statically generating the array of qMetaTypeId (used by
the template-based QObject::connect()) remains in qobject_impl.h,
since it's not needed for QMetaMethod::fromSignal(). Moreover, moving
that code would introduce a circular dependency, since qmetatype.h
as of commit 194674044693d6b101c3dc2f4784718540d343a4 now includes
qobjectdefs.h.

Change-Id: I36c35041e0c6661c3cf523684177a0b6c19e2d35
Reviewed-by: Olivier Goffart <ogoffart@woboq.com>
Reviewed-by: Bradley T. Hughes <bradley.hughes@nokia.com>

diff --git a/src/corelib/kernel/kernel.pri b/src/corelib/kernel/kernel.pri
index bef2929..b645d48 100644 (file)
--- a/src/corelib/kernel/kernel.pri
+++ b/src/corelib/kernel/kernel.pri
@@ -14,6 +14,7 @@ HEADERS += \
         kernel/qobject.h \
         kernel/qobject_impl.h \
         kernel/qobjectdefs.h \
+        kernel/qobjectdefs_impl.h \
         kernel/qsignalmapper.h \
         kernel/qsocketnotifier.h \
         kernel/qtimer.h \

diff --git a/src/corelib/kernel/qobject_impl.h b/src/corelib/kernel/qobject_impl.h
index 419fcc1..e016002 100644 (file)
--- a/src/corelib/kernel/qobject_impl.h
+++ b/src/corelib/kernel/qobject_impl.h
@@ -51,431 +51,6 @@ QT_BEGIN_NAMESPACE
 
 
 namespace QtPrivate {
-    template <typename T> struct RemoveRef { typedef T Type; };
-    template <typename T> struct RemoveRef<T&> { typedef T Type; };
-    template <typename T> struct RemoveConstRef { typedef T Type; };
-    template <typename T> struct RemoveConstRef<const T&> { typedef T Type; };
-
-    /*
-       The following List classes are used to help to handle the list of arguments.
-       It follow the same principles as the lisp lists.
-       List_Left<L,N> take a list and a number as a parametter and returns (via the Value typedef,
-       the list composed of the first N element of the list
-     */
-#ifndef Q_COMPILER_VARIADIC_TEMPLATES
-    template <typename Head, typename Tail> struct List { typedef Head Car; typedef Tail Cdr; };
-    template <typename L, int N> struct List_Left { typedef List<typename L::Car, typename List_Left<typename L::Cdr, N - 1>::Value > Value; };
-    template <typename L> struct List_Left<L,0> { typedef void Value; };
-#else
-    // With variadic template, lists are represented using a variadic template argument instead of the lisp way
-    template <typename...> struct List {};
-    template <typename Head, typename... Tail> struct List<Head, Tail...> { typedef Head Car; typedef List<Tail...> Cdr; };
-    template <typename, typename> struct List_Append;
-    template <typename... L1, typename...L2> struct List_Append<List<L1...>, List<L2...>> { typedef List<L1..., L2...> Value; };
-    template <typename L, int N> struct List_Left {
-        typedef typename List_Append<List<typename L::Car>,typename List_Left<typename L::Cdr, N - 1>::Value>::Value Value;
-    };
-    template <typename L> struct List_Left<L, 0> { typedef List<> Value; };
-#endif
-    // List_Select<L,N> returns (via typedef Value) the Nth element of the list L
-    template <typename L, int N> struct List_Select { typedef typename List_Select<typename L::Cdr, N - 1>::Value Value; };
-    template <typename L> struct List_Select<L,0> { typedef typename L::Car Value; };
-
-    /*
-       trick to set the return value of a slot that works even if the signal or the slot returns void
-       to be used like     function(), ApplyReturnValue<ReturnType>(&return_value)
-       if function() returns a value, the operator,(T, ApplyReturnValue<ReturnType>) is called, but if it
-       returns void, the builtin one is used without an error.
-    */
-    template <typename T>
-    struct ApplyReturnValue {
-        void *data;
-        ApplyReturnValue(void *data_) : data(data_) {}
-    };
-    template<typename T, typename U>
-    void operator,(const T &value, const ApplyReturnValue<U> &container) {
-        if (container.data)
-            *reinterpret_cast<U*>(container.data) = value;
-    }
-#ifdef Q_COMPILER_RVALUE_REFS
-    template<typename T, typename U>
-    void operator,(T &&value, const ApplyReturnValue<U> &container) {
-        if (container.data)
-            *reinterpret_cast<U*>(container.data) = value;
-    }
-#endif
-    template<typename T>
-    void operator,(T, const ApplyReturnValue<void> &) {}
-
-
-    /*
-      The FunctionPointer<Func> struct is a type trait for function pointer.
-        - ArgumentCount  is the number of argument, or -1 if it is unknown
-        - the Object typedef is the Object of a pointer to member function
-        - the Arguments typedef is the list of argument (in a QtPrivate::List)
-        - the Function typedef is an alias to the template parametter Func
-        - the call<Args, R>(f,o,args) method is used to call that slot
-            Args is the list of argument of the signal
-            R is the return type of the signal
-            f is the function pointer
-            o is the receiver object
-            and args is the array of pointer to arguments, as used in qt_metacall
-
-       The Functor<Func,N> struct is the helper to call a functor of N argument.
-       its call function is the same as the FunctionPointer::call function.
-     */
-#ifndef Q_COMPILER_VARIADIC_TEMPLATES
-    template<typename Func> struct FunctionPointer { enum {ArgumentCount = -1}; };
-    template<class Obj, typename Ret> struct FunctionPointer<Ret (Obj::*) ()>
-    {
-        typedef Obj Object;
-        typedef void Arguments;
-        typedef Ret ReturnType;
-        typedef Ret (Obj::*Function) ();
-        enum {ArgumentCount = 0};
-        template <typename Args, typename R>
-        static void call(Function f, Obj *o, void **arg) { (o->*f)(), ApplyReturnValue<R>(arg[0]); }
-    };
-    template<class Obj, typename Ret, typename Arg1> struct FunctionPointer<Ret (Obj::*) (Arg1)>
-    {
-        typedef Obj Object;
-        typedef List<Arg1, void> Arguments;
-        typedef Ret ReturnType;
-        typedef Ret (Obj::*Function) (Arg1);
-        enum {ArgumentCount = 1};
-        template <typename Args, typename R>
-        static void call(Function f, Obj *o, void **arg) {
-            (o->*f)((*reinterpret_cast<typename RemoveRef<typename Args::Car>::Type *>(arg[1]))), ApplyReturnValue<R>(arg[0]);
-        }
-    };
-    template<class Obj, typename Ret, typename Arg1, typename Arg2> struct FunctionPointer<Ret (Obj::*) (Arg1, Arg2)>
-    {
-        typedef Obj Object;
-        typedef List<Arg1, List<Arg2, void> >  Arguments;
-        typedef Ret ReturnType;
-        typedef Ret (Obj::*Function) (Arg1, Arg2);
-        enum {ArgumentCount = 2};
-        template <typename Args, typename R>
-        static void call(Function f, Obj *o, void **arg) {
-            (o->*f)( *reinterpret_cast<typename RemoveRef<typename List_Select<Args, 0>::Value>::Type *>(arg[1]),
-                     *reinterpret_cast<typename RemoveRef<typename List_Select<Args, 1>::Value>::Type *>(arg[2])), ApplyReturnValue<R>(arg[0]);
-        }
-    };
-    template<class Obj, typename Ret, typename Arg1, typename Arg2, typename Arg3> struct FunctionPointer<Ret (Obj::*) (Arg1, Arg2, Arg3)>
-    {
-        typedef Obj Object;
-        typedef List<Arg1, List<Arg2, List<Arg3, void> > >  Arguments;
-        typedef Ret ReturnType;
-        typedef Ret (Obj::*Function) (Arg1, Arg2, Arg3);
-        enum {ArgumentCount = 3};
-        template <typename Args, typename R>
-        static void call(Function f, Obj *o, void **arg) {
-            (o->*f)( *reinterpret_cast<typename RemoveRef<typename List_Select<Args, 0>::Value>::Type *>(arg[1]),
-                     *reinterpret_cast<typename RemoveRef<typename List_Select<Args, 1>::Value>::Type *>(arg[2]),
-                     *reinterpret_cast<typename RemoveRef<typename List_Select<Args, 2>::Value>::Type *>(arg[3])), ApplyReturnValue<R>(arg[0]);
-        }
-    };
-    template<class Obj, typename Ret, typename Arg1, typename Arg2, typename Arg3, typename Arg4> struct FunctionPointer<Ret (Obj::*) (Arg1, Arg2, Arg3, Arg4)>
-    {
-        typedef Obj Object;
-        typedef List<Arg1, List<Arg2, List<Arg3, List<Arg4, void> > > >  Arguments;
-        typedef Ret ReturnType;
-        typedef Ret (Obj::*Function) (Arg1, Arg2, Arg3, Arg4);
-        enum {ArgumentCount = 4};
-        template <typename Args, typename R>
-        static void call(Function f, Obj *o, void **arg) {
-            (o->*f)( *reinterpret_cast<typename RemoveRef<typename List_Select<Args, 0>::Value>::Type *>(arg[1]),
-                     *reinterpret_cast<typename RemoveRef<typename List_Select<Args, 1>::Value>::Type *>(arg[2]),
-                     *reinterpret_cast<typename RemoveRef<typename List_Select<Args, 2>::Value>::Type *>(arg[3]),
-                     *reinterpret_cast<typename RemoveRef<typename List_Select<Args, 3>::Value>::Type *>(arg[4])), ApplyReturnValue<R>(arg[0]);
-        }
-    };
-    template<class Obj, typename Ret, typename Arg1, typename Arg2, typename Arg3, typename Arg4, typename Arg5> struct FunctionPointer<Ret (Obj::*) (Arg1, Arg2, Arg3, Arg4, Arg5)>
-    {
-        typedef Obj Object;
-        typedef List<Arg1, List<Arg2, List<Arg3, List<Arg4, List<Arg5, void> > > > >  Arguments;
-        typedef Ret ReturnType;
-        typedef Ret (Obj::*Function) (Arg1, Arg2, Arg3, Arg4, Arg5);
-        enum {ArgumentCount = 5};
-        template <typename Args, typename R>
-        static void call(Function f, Obj *o, void **arg) {
-            (o->*f)( *reinterpret_cast<typename RemoveRef<typename List_Select<Args, 0>::Value>::Type *>(arg[1]),
-                     *reinterpret_cast<typename RemoveRef<typename List_Select<Args, 1>::Value>::Type *>(arg[2]),
-                     *reinterpret_cast<typename RemoveRef<typename List_Select<Args, 2>::Value>::Type *>(arg[3]),
-                     *reinterpret_cast<typename RemoveRef<typename List_Select<Args, 3>::Value>::Type *>(arg[4]),
-                     *reinterpret_cast<typename RemoveRef<typename List_Select<Args, 4>::Value>::Type *>(arg[5])), ApplyReturnValue<R>(arg[0]);
-        }
-    };
-    template<class Obj, typename Ret, typename Arg1, typename Arg2, typename Arg3, typename Arg4, typename Arg5, typename Arg6>
-    struct FunctionPointer<Ret (Obj::*) (Arg1, Arg2, Arg3, Arg4, Arg5, Arg6)>
-    {
-        typedef Obj Object;
-        typedef List<Arg1, List<Arg2, List<Arg3, List<Arg4, List<Arg5, List<Arg6, void> > > > > >  Arguments;
-        typedef Ret ReturnType;
-        typedef Ret (Obj::*Function) (Arg1, Arg2, Arg3, Arg4, Arg5, Arg6);
-        enum {ArgumentCount = 6};
-        template <typename Args, typename R>
-        static void call(Function f, Obj *o, void **arg) {
-            (o->*f)( *reinterpret_cast<typename RemoveRef<typename List_Select<Args, 0>::Value>::Type *>(arg[1]),
-                     *reinterpret_cast<typename RemoveRef<typename List_Select<Args, 1>::Value>::Type *>(arg[2]),
-                     *reinterpret_cast<typename RemoveRef<typename List_Select<Args, 2>::Value>::Type *>(arg[3]),
-                     *reinterpret_cast<typename RemoveRef<typename List_Select<Args, 3>::Value>::Type *>(arg[4]),
-                     *reinterpret_cast<typename RemoveRef<typename List_Select<Args, 4>::Value>::Type *>(arg[5]),
-                     *reinterpret_cast<typename RemoveRef<typename List_Select<Args, 5>::Value>::Type *>(arg[6])), ApplyReturnValue<R>(arg[0]);
-        }
-    };
-
-    template<typename Ret> struct FunctionPointer<Ret (*) ()>
-    {
-        typedef void Arguments;
-        typedef Ret (*Function) ();
-        typedef Ret ReturnType;
-        enum {ArgumentCount = 0};
-        template <typename Args, typename R>
-        static void call(Function f, void *, void **arg) { f(), ApplyReturnValue<R>(arg[0]); }
-    };
-    template<typename Ret, typename Arg1> struct FunctionPointer<Ret (*) (Arg1)>
-    {
-        typedef List<Arg1, void> Arguments;
-        typedef Ret ReturnType;
-        typedef Ret (*Function) (Arg1);
-        enum {ArgumentCount = 1};
-        template <typename Args, typename R>
-        static void call(Function f, void *, void **arg)
-        { f(*reinterpret_cast<typename RemoveRef<typename List_Select<Args, 0>::Value>::Type *>(arg[1])), ApplyReturnValue<R>(arg[0]); }
-    };
-    template<typename Ret, typename Arg1, typename Arg2> struct FunctionPointer<Ret (*) (Arg1, Arg2)>
-    {
-        typedef List<Arg1, List<Arg2, void> > Arguments;
-        typedef Ret ReturnType;
-        typedef Ret (*Function) (Arg1, Arg2);
-        enum {ArgumentCount = 2};
-        template <typename Args, typename R>
-        static void call(Function f, void *, void **arg) {
-            f(*reinterpret_cast<typename RemoveRef<typename List_Select<Args, 0>::Value>::Type *>(arg[1]),
-              *reinterpret_cast<typename RemoveRef<typename List_Select<Args, 1>::Value>::Type *>(arg[2])), ApplyReturnValue<R>(arg[0]); }
-    };
-    template<typename Ret, typename Arg1, typename Arg2, typename Arg3> struct FunctionPointer<Ret (*) (Arg1, Arg2, Arg3)>
-    {
-        typedef List<Arg1, List<Arg2, List<Arg3, void> > >  Arguments;
-        typedef Ret ReturnType;
-        typedef Ret (*Function) (Arg1, Arg2, Arg3);
-        enum {ArgumentCount = 3};
-        template <typename Args, typename R>
-        static void call(Function f, void *, void **arg) {
-            f(       *reinterpret_cast<typename RemoveRef<typename List_Select<Args, 0>::Value>::Type *>(arg[1]),
-                     *reinterpret_cast<typename RemoveRef<typename List_Select<Args, 1>::Value>::Type *>(arg[2]),
-                     *reinterpret_cast<typename RemoveRef<typename List_Select<Args, 2>::Value>::Type *>(arg[3])), ApplyReturnValue<R>(arg[0]);
-        }
-    };
-    template<typename Ret, typename Arg1, typename Arg2, typename Arg3, typename Arg4> struct FunctionPointer<Ret (*) (Arg1, Arg2, Arg3, Arg4)>
-    {
-        typedef List<Arg1, List<Arg2, List<Arg3, List<Arg4, void> > > >  Arguments;
-        typedef Ret ReturnType;
-        typedef Ret (*Function) (Arg1, Arg2, Arg3, Arg4);
-        enum {ArgumentCount = 4};
-        template <typename Args, typename R>
-        static void call(Function f, void *, void **arg) {
-            f(       *reinterpret_cast<typename RemoveRef<typename List_Select<Args, 0>::Value>::Type *>(arg[1]),
-                     *reinterpret_cast<typename RemoveRef<typename List_Select<Args, 1>::Value>::Type *>(arg[2]),
-                     *reinterpret_cast<typename RemoveRef<typename List_Select<Args, 2>::Value>::Type *>(arg[3]),
-                     *reinterpret_cast<typename RemoveRef<typename List_Select<Args, 3>::Value>::Type *>(arg[4])), ApplyReturnValue<R>(arg[0]);
-        }
-    };
-    template<typename Ret, typename Arg1, typename Arg2, typename Arg3, typename Arg4, typename Arg5> struct FunctionPointer<Ret (*) (Arg1, Arg2, Arg3, Arg4, Arg5)>
-    {
-        typedef List<Arg1, List<Arg2, List<Arg3,
-        List<Arg4, List<Arg5, void > > > > >  Arguments;
-        typedef Ret ReturnType;
-        typedef Ret (*Function) (Arg1, Arg2, Arg3, Arg4, Arg5);
-        enum {ArgumentCount = 5};
-        template <typename Args, typename R>
-        static void call(Function f, void *, void **arg) {
-            f(       *reinterpret_cast<typename RemoveRef<typename List_Select<Args, 0>::Value>::Type *>(arg[1]),
-                     *reinterpret_cast<typename RemoveRef<typename List_Select<Args, 1>::Value>::Type *>(arg[2]),
-                     *reinterpret_cast<typename RemoveRef<typename List_Select<Args, 2>::Value>::Type *>(arg[3]),
-                     *reinterpret_cast<typename RemoveRef<typename List_Select<Args, 3>::Value>::Type *>(arg[4]),
-                     *reinterpret_cast<typename RemoveRef<typename List_Select<Args, 4>::Value>::Type *>(arg[5])), ApplyReturnValue<R>(arg[0]);
-        }
-    };
-    template<typename Ret, typename Arg1, typename Arg2, typename Arg3, typename Arg4, typename Arg5, typename Arg6> struct FunctionPointer<Ret (*) (Arg1, Arg2, Arg3, Arg4, Arg5, Arg6)>
-    {
-        typedef List<Arg1, List<Arg2, List<Arg3, List<Arg4, List<Arg5, List<Arg6, void> > > > > >  Arguments;
-        typedef Ret ReturnType;
-        typedef Ret (*Function) (Arg1, Arg2, Arg3, Arg4, Arg5, Arg6);
-        enum {ArgumentCount = 6};
-        template <typename Args, typename R>
-        static void call(Function f, void *, void **arg) {
-            f(       *reinterpret_cast<typename RemoveRef<typename List_Select<Args, 0>::Value>::Type *>(arg[1]),
-                     *reinterpret_cast<typename RemoveRef<typename List_Select<Args, 1>::Value>::Type *>(arg[2]),
-                     *reinterpret_cast<typename RemoveRef<typename List_Select<Args, 2>::Value>::Type *>(arg[3]),
-                     *reinterpret_cast<typename RemoveRef<typename List_Select<Args, 3>::Value>::Type *>(arg[4]),
-                     *reinterpret_cast<typename RemoveRef<typename List_Select<Args, 4>::Value>::Type *>(arg[5]),
-                     *reinterpret_cast<typename RemoveRef<typename List_Select<Args, 5>::Value>::Type *>(arg[6])), ApplyReturnValue<R>(arg[0]);
-        }
-    };
-
-    template<typename F, int N> struct Functor;
-    template<typename Function> struct Functor<Function, 0>
-    {
-        template <typename Args, typename R>
-        static void call(Function &f, void *, void **arg) { f(), ApplyReturnValue<R>(arg[0]); }
-    };
-    template<typename Function> struct Functor<Function, 1>
-    {
-        template <typename Args, typename R>
-        static void call(Function &f, void *, void **arg) {
-            f(*reinterpret_cast<typename RemoveRef<typename List_Select<Args, 0>::Value>::Type *>(arg[1])), ApplyReturnValue<R>(arg[0]);
-        }
-    };
-    template<typename Function> struct Functor<Function, 2>
-    {
-        template <typename Args, typename R>
-        static void call(Function &f, void *, void **arg) {
-            f( *reinterpret_cast<typename RemoveRef<typename List_Select<Args, 0>::Value>::Type *>(arg[1]),
-               *reinterpret_cast<typename RemoveRef<typename List_Select<Args, 1>::Value>::Type *>(arg[2])), ApplyReturnValue<R>(arg[0]);
-        }
-    };
-    template<typename Function> struct Functor<Function, 3>
-    {
-        template <typename Args, typename R>
-        static void call(Function &f, void *, void **arg) {
-            f( *reinterpret_cast<typename RemoveRef<typename List_Select<Args, 0>::Value>::Type *>(arg[1]),
-               *reinterpret_cast<typename RemoveRef<typename List_Select<Args, 1>::Value>::Type *>(arg[2]),
-               *reinterpret_cast<typename RemoveRef<typename List_Select<Args, 2>::Value>::Type *>(arg[4])), ApplyReturnValue<R>(arg[0]);
-        }
-    };
-    template<typename Function> struct Functor<Function, 4>
-    {
-        template <typename Args, typename R>
-        static void call(Function &f, void *, void **arg) {
-            f( *reinterpret_cast<typename RemoveRef<typename List_Select<Args, 0>::Value>::Type *>(arg[1]),
-               *reinterpret_cast<typename RemoveRef<typename List_Select<Args, 1>::Value>::Type *>(arg[2]),
-               *reinterpret_cast<typename RemoveRef<typename List_Select<Args, 2>::Value>::Type *>(arg[3]),
-               *reinterpret_cast<typename RemoveRef<typename List_Select<Args, 3>::Value>::Type *>(arg[4])), ApplyReturnValue<R>(arg[0]);
-        }
-    };
-    template<typename Function> struct Functor<Function, 5>
-    {
-        template <typename Args, typename R>
-        static void call(Function &f, void *, void **arg) {
-            f( *reinterpret_cast<typename RemoveRef<typename List_Select<Args, 0>::Value>::Type *>(arg[1]),
-               *reinterpret_cast<typename RemoveRef<typename List_Select<Args, 1>::Value>::Type *>(arg[2]),
-               *reinterpret_cast<typename RemoveRef<typename List_Select<Args, 2>::Value>::Type *>(arg[3]),
-               *reinterpret_cast<typename RemoveRef<typename List_Select<Args, 3>::Value>::Type *>(arg[4]),
-               *reinterpret_cast<typename RemoveRef<typename List_Select<Args, 4>::Value>::Type *>(arg[5])), ApplyReturnValue<R>(arg[0]);
-        }
-    };
-    template<typename Function> struct Functor<Function, 6>
-    {
-        template <typename Args, typename R>
-        static void call(Function &f, void *, void **arg) {
-            f( *reinterpret_cast<typename RemoveRef<typename List_Select<Args, 0>::Value>::Type *>(arg[1]),
-               *reinterpret_cast<typename RemoveRef<typename List_Select<Args, 1>::Value>::Type *>(arg[2]),
-               *reinterpret_cast<typename RemoveRef<typename List_Select<Args, 2>::Value>::Type *>(arg[3]),
-               *reinterpret_cast<typename RemoveRef<typename List_Select<Args, 3>::Value>::Type *>(arg[4]),
-               *reinterpret_cast<typename RemoveRef<typename List_Select<Args, 4>::Value>::Type *>(arg[5]),
-               *reinterpret_cast<typename RemoveRef<typename List_Select<Args, 5>::Value>::Type *>(arg[6])), ApplyReturnValue<R>(arg[0]);
-        }
-    };
-#else
-    template <int...> struct IndexesList {};
-    template <typename IndexList, int Right> struct IndexesAppend;
-    template <int... Left, int Right> struct IndexesAppend<IndexesList<Left...>, Right>
-    { typedef IndexesList<Left..., Right> Value; };
-    template <int N> struct Indexes
-    { typedef typename IndexesAppend<typename Indexes<N - 1>::Value, N - 1>::Value Value; };
-    template <> struct Indexes<0> { typedef IndexesList<> Value; };
-    template<typename Func> struct FunctionPointer { enum {ArgumentCount = -1}; };
-
-    template <typename, typename, typename, typename> struct FunctorCall;
-    template <int... I, typename... SignalArgs, typename R, typename Function>
-    struct FunctorCall<IndexesList<I...>, List<SignalArgs...>, R, Function> {
-        static void call(Function f, void **arg) {
-            f((*reinterpret_cast<typename RemoveRef<SignalArgs>::Type *>(arg[I+1]))...), ApplyReturnValue<R>(arg[0]);
-        }
-    };
-    template <int... I, typename... SignalArgs, typename R, typename... SlotArgs, typename SlotRet, class Obj>
-    struct FunctorCall<IndexesList<I...>, List<SignalArgs...>, R, SlotRet (Obj::*)(SlotArgs...)> {
-        static void call(SlotRet (Obj::*f)(SlotArgs...), Obj *o, void **arg) {
-            (o->*f)((*reinterpret_cast<typename RemoveRef<SignalArgs>::Type *>(arg[I+1]))...), ApplyReturnValue<R>(arg[0]);
-        }
-    };
-
-    template<class Obj, typename Ret, typename... Args> struct FunctionPointer<Ret (Obj::*) (Args...)>
-    {
-        typedef Obj Object;
-        typedef List<Args...>  Arguments;
-        typedef Ret ReturnType;
-        typedef Ret (Obj::*Function) (Args...);
-        enum {ArgumentCount = sizeof...(Args)};
-        template <typename SignalArgs, typename R>
-        static void call(Function f, Obj *o, void **arg) {
-            FunctorCall<typename Indexes<ArgumentCount>::Value, SignalArgs, R, Function>::call(f, o, arg);
-        }
-    };
-
-    template<typename Ret, typename... Args> struct FunctionPointer<Ret (*) (Args...)>
-    {
-        typedef List<Args...> Arguments;
-        typedef Ret ReturnType;
-        typedef Ret (*Function) (Args...);
-        enum {ArgumentCount = sizeof...(Args)};
-        template <typename SignalArgs, typename R>
-        static void call(Function f, void *, void **arg) {
-            FunctorCall<typename Indexes<ArgumentCount>::Value, SignalArgs, R, Function>::call(f, arg);
-        }
-    };
-
-    template<typename Function, int N> struct Functor
-    {
-        template <typename SignalArgs, typename R>
-        static void call(Function &f, void *, void **arg) {
-            FunctorCall<typename Indexes<N>::Value, SignalArgs, R, Function>::call(f, arg);
-        }
-    };
-#endif
-
-    /*
-       Logic that check if the arguments of the slot matches the argument of the signal.
-       To be used like this:
-       Q_STATIC_ASSERT(CheckCompatibleArguments<FunctionPointer<Signal>::Arguments, FunctionPointer<Slot>::Arguments>::value)
-    */
-    template<typename A1, typename A2> struct AreArgumentsCompatible {
-        static int test(A2);
-        static char test(...);
-        static A1 dummy();
-        enum { value = sizeof(test(dummy())) == sizeof(int) };
-    };
-    template<typename A1, typename A2> struct AreArgumentsCompatible<A1, A2&> { enum { value = false }; };
-    template<typename A> struct AreArgumentsCompatible<A&, A&> { enum { value = true }; };
-    // void as a return value
-    template<typename A> struct AreArgumentsCompatible<void, A> { enum { value = true }; };
-    template<typename A> struct AreArgumentsCompatible<A, void> { enum { value = true }; };
-    template<> struct AreArgumentsCompatible<void, void> { enum { value = true }; };
-
-#ifndef Q_COMPILER_VARIADIC_TEMPLATES
-    template <typename List1, typename List2> struct CheckCompatibleArguments { enum { value = false }; };
-    template <> struct CheckCompatibleArguments<void, void> { enum { value = true }; };
-    template <typename List1> struct CheckCompatibleArguments<List1, void> { enum { value = true }; };
-    template <typename Arg1, typename Arg2, typename Tail1, typename Tail2> struct CheckCompatibleArguments<List<Arg1, Tail1>, List<Arg2, Tail2> >
-    {
-        enum { value = AreArgumentsCompatible<typename RemoveConstRef<Arg1>::Type, typename RemoveConstRef<Arg2>::Type>::value
-                    && CheckCompatibleArguments<Tail1, Tail2>::value };
-    };
-#else
-    template <typename List1, typename List2> struct CheckCompatibleArguments { enum { value = false }; };
-    template <> struct CheckCompatibleArguments<List<>, List<>> { enum { value = true }; };
-    template <typename List1> struct CheckCompatibleArguments<List1, List<>> { enum { value = true }; };
-    template <typename Arg1, typename Arg2, typename... Tail1, typename... Tail2>
-    struct CheckCompatibleArguments<List<Arg1, Tail1...>, List<Arg2, Tail2...>>
-    {
-        enum { value = AreArgumentsCompatible<typename RemoveConstRef<Arg1>::Type, typename RemoveConstRef<Arg2>::Type>::value
-                    && CheckCompatibleArguments<List<Tail1...>, List<Tail2...>>::value };
-    };
-
-#endif
-
     /*
         Logic to statically generate the array of qMetaTypeId
         ConnectionTypes<FunctionPointer<Signal>::Arguments>::types() returns an array

diff --git a/src/corelib/kernel/qobjectdefs.h b/src/corelib/kernel/qobjectdefs.h
index 9bcb8b9..a52961b 100644 (file)
--- a/src/corelib/kernel/qobjectdefs.h
+++ b/src/corelib/kernel/qobjectdefs.h
@@ -44,6 +44,8 @@
 
 #include <QtCore/qnamespace.h>
 
+#include <QtCore/qobjectdefs_impl.h>
+
 QT_BEGIN_HEADER
 
 QT_BEGIN_NAMESPACE

diff --git a/src/corelib/kernel/qobjectdefs_impl.h b/src/corelib/kernel/qobjectdefs_impl.h
new file mode 100644 (file)
index 0000000..5efe08b
--- /dev/null
+++ b/src/corelib/kernel/qobjectdefs_impl.h
@@ -0,0 +1,485 @@
+/****************************************************************************
+**
+** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/
+**
+** This file is part of the QtCore module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** GNU Lesser General Public License Usage
+** This file may be used under the terms of the GNU Lesser General Public
+** License version 2.1 as published by the Free Software Foundation and
+** appearing in the file LICENSE.LGPL included in the packaging of this
+** file. Please review the following information to ensure the GNU Lesser
+** General Public License version 2.1 requirements will be met:
+** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain additional
+** rights. These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU General
+** Public License version 3.0 as published by the Free Software Foundation
+** and appearing in the file LICENSE.GPL included in the packaging of this
+** file. Please review the following information to ensure the GNU General
+** Public License version 3.0 requirements will be met:
+** http://www.gnu.org/copyleft/gpl.html.
+**
+** Other Usage
+** Alternatively, this file may be used in accordance with the terms and
+** conditions contained in a signed written agreement between you and Nokia.
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef Q_QDOC
+
+#ifndef QOBJECTDEFS_H
+#error Do not include qobjectdefs_impl.h directly
+#endif
+
+QT_BEGIN_HEADER
+
+QT_BEGIN_NAMESPACE
+
+
+namespace QtPrivate {
+    template <typename T> struct RemoveRef { typedef T Type; };
+    template <typename T> struct RemoveRef<T&> { typedef T Type; };
+    template <typename T> struct RemoveConstRef { typedef T Type; };
+    template <typename T> struct RemoveConstRef<const T&> { typedef T Type; };
+
+    /*
+       The following List classes are used to help to handle the list of arguments.
+       It follow the same principles as the lisp lists.
+       List_Left<L,N> take a list and a number as a parametter and returns (via the Value typedef,
+       the list composed of the first N element of the list
+     */
+#ifndef Q_COMPILER_VARIADIC_TEMPLATES
+    template <typename Head, typename Tail> struct List { typedef Head Car; typedef Tail Cdr; };
+    template <typename L, int N> struct List_Left { typedef List<typename L::Car, typename List_Left<typename L::Cdr, N - 1>::Value > Value; };
+    template <typename L> struct List_Left<L,0> { typedef void Value; };
+#else
+    // With variadic template, lists are represented using a variadic template argument instead of the lisp way
+    template <typename...> struct List {};
+    template <typename Head, typename... Tail> struct List<Head, Tail...> { typedef Head Car; typedef List<Tail...> Cdr; };
+    template <typename, typename> struct List_Append;
+    template <typename... L1, typename...L2> struct List_Append<List<L1...>, List<L2...>> { typedef List<L1..., L2...> Value; };
+    template <typename L, int N> struct List_Left {
+        typedef typename List_Append<List<typename L::Car>,typename List_Left<typename L::Cdr, N - 1>::Value>::Value Value;
+    };
+    template <typename L> struct List_Left<L, 0> { typedef List<> Value; };
+#endif
+    // List_Select<L,N> returns (via typedef Value) the Nth element of the list L
+    template <typename L, int N> struct List_Select { typedef typename List_Select<typename L::Cdr, N - 1>::Value Value; };
+    template <typename L> struct List_Select<L,0> { typedef typename L::Car Value; };
+
+    /*
+       trick to set the return value of a slot that works even if the signal or the slot returns void
+       to be used like     function(), ApplyReturnValue<ReturnType>(&return_value)
+       if function() returns a value, the operator,(T, ApplyReturnValue<ReturnType>) is called, but if it
+       returns void, the builtin one is used without an error.
+    */
+    template <typename T>
+    struct ApplyReturnValue {
+        void *data;
+        ApplyReturnValue(void *data_) : data(data_) {}
+    };
+    template<typename T, typename U>
+    void operator,(const T &value, const ApplyReturnValue<U> &container) {
+        if (container.data)
+            *reinterpret_cast<U*>(container.data) = value;
+    }
+#ifdef Q_COMPILER_RVALUE_REFS
+    template<typename T, typename U>
+    void operator,(T &&value, const ApplyReturnValue<U> &container) {
+        if (container.data)
+            *reinterpret_cast<U*>(container.data) = value;
+    }
+#endif
+    template<typename T>
+    void operator,(T, const ApplyReturnValue<void> &) {}
+
+
+    /*
+      The FunctionPointer<Func> struct is a type trait for function pointer.
+        - ArgumentCount  is the number of argument, or -1 if it is unknown
+        - the Object typedef is the Object of a pointer to member function
+        - the Arguments typedef is the list of argument (in a QtPrivate::List)
+        - the Function typedef is an alias to the template parametter Func
+        - the call<Args, R>(f,o,args) method is used to call that slot
+            Args is the list of argument of the signal
+            R is the return type of the signal
+            f is the function pointer
+            o is the receiver object
+            and args is the array of pointer to arguments, as used in qt_metacall
+
+       The Functor<Func,N> struct is the helper to call a functor of N argument.
+       its call function is the same as the FunctionPointer::call function.
+     */
+#ifndef Q_COMPILER_VARIADIC_TEMPLATES
+    template<typename Func> struct FunctionPointer { enum {ArgumentCount = -1}; };
+    template<class Obj, typename Ret> struct FunctionPointer<Ret (Obj::*) ()>
+    {
+        typedef Obj Object;
+        typedef void Arguments;
+        typedef Ret ReturnType;
+        typedef Ret (Obj::*Function) ();
+        enum {ArgumentCount = 0};
+        template <typename Args, typename R>
+        static void call(Function f, Obj *o, void **arg) { (o->*f)(), ApplyReturnValue<R>(arg[0]); }
+    };
+    template<class Obj, typename Ret, typename Arg1> struct FunctionPointer<Ret (Obj::*) (Arg1)>
+    {
+        typedef Obj Object;
+        typedef List<Arg1, void> Arguments;
+        typedef Ret ReturnType;
+        typedef Ret (Obj::*Function) (Arg1);
+        enum {ArgumentCount = 1};
+        template <typename Args, typename R>
+        static void call(Function f, Obj *o, void **arg) {
+            (o->*f)((*reinterpret_cast<typename RemoveRef<typename Args::Car>::Type *>(arg[1]))), ApplyReturnValue<R>(arg[0]);
+        }
+    };
+    template<class Obj, typename Ret, typename Arg1, typename Arg2> struct FunctionPointer<Ret (Obj::*) (Arg1, Arg2)>
+    {
+        typedef Obj Object;
+        typedef List<Arg1, List<Arg2, void> >  Arguments;
+        typedef Ret ReturnType;
+        typedef Ret (Obj::*Function) (Arg1, Arg2);
+        enum {ArgumentCount = 2};
+        template <typename Args, typename R>
+        static void call(Function f, Obj *o, void **arg) {
+            (o->*f)( *reinterpret_cast<typename RemoveRef<typename List_Select<Args, 0>::Value>::Type *>(arg[1]),
+                     *reinterpret_cast<typename RemoveRef<typename List_Select<Args, 1>::Value>::Type *>(arg[2])), ApplyReturnValue<R>(arg[0]);
+        }
+    };
+    template<class Obj, typename Ret, typename Arg1, typename Arg2, typename Arg3> struct FunctionPointer<Ret (Obj::*) (Arg1, Arg2, Arg3)>
+    {
+        typedef Obj Object;
+        typedef List<Arg1, List<Arg2, List<Arg3, void> > >  Arguments;
+        typedef Ret ReturnType;
+        typedef Ret (Obj::*Function) (Arg1, Arg2, Arg3);
+        enum {ArgumentCount = 3};
+        template <typename Args, typename R>
+        static void call(Function f, Obj *o, void **arg) {
+            (o->*f)( *reinterpret_cast<typename RemoveRef<typename List_Select<Args, 0>::Value>::Type *>(arg[1]),
+                     *reinterpret_cast<typename RemoveRef<typename List_Select<Args, 1>::Value>::Type *>(arg[2]),
+                     *reinterpret_cast<typename RemoveRef<typename List_Select<Args, 2>::Value>::Type *>(arg[3])), ApplyReturnValue<R>(arg[0]);
+        }
+    };
+    template<class Obj, typename Ret, typename Arg1, typename Arg2, typename Arg3, typename Arg4> struct FunctionPointer<Ret (Obj::*) (Arg1, Arg2, Arg3, Arg4)>
+    {
+        typedef Obj Object;
+        typedef List<Arg1, List<Arg2, List<Arg3, List<Arg4, void> > > >  Arguments;
+        typedef Ret ReturnType;
+        typedef Ret (Obj::*Function) (Arg1, Arg2, Arg3, Arg4);
+        enum {ArgumentCount = 4};
+        template <typename Args, typename R>
+        static void call(Function f, Obj *o, void **arg) {
+            (o->*f)( *reinterpret_cast<typename RemoveRef<typename List_Select<Args, 0>::Value>::Type *>(arg[1]),
+                     *reinterpret_cast<typename RemoveRef<typename List_Select<Args, 1>::Value>::Type *>(arg[2]),
+                     *reinterpret_cast<typename RemoveRef<typename List_Select<Args, 2>::Value>::Type *>(arg[3]),
+                     *reinterpret_cast<typename RemoveRef<typename List_Select<Args, 3>::Value>::Type *>(arg[4])), ApplyReturnValue<R>(arg[0]);
+        }
+    };
+    template<class Obj, typename Ret, typename Arg1, typename Arg2, typename Arg3, typename Arg4, typename Arg5> struct FunctionPointer<Ret (Obj::*) (Arg1, Arg2, Arg3, Arg4, Arg5)>
+    {
+        typedef Obj Object;
+        typedef List<Arg1, List<Arg2, List<Arg3, List<Arg4, List<Arg5, void> > > > >  Arguments;
+        typedef Ret ReturnType;
+        typedef Ret (Obj::*Function) (Arg1, Arg2, Arg3, Arg4, Arg5);
+        enum {ArgumentCount = 5};
+        template <typename Args, typename R>
+        static void call(Function f, Obj *o, void **arg) {
+            (o->*f)( *reinterpret_cast<typename RemoveRef<typename List_Select<Args, 0>::Value>::Type *>(arg[1]),
+                     *reinterpret_cast<typename RemoveRef<typename List_Select<Args, 1>::Value>::Type *>(arg[2]),
+                     *reinterpret_cast<typename RemoveRef<typename List_Select<Args, 2>::Value>::Type *>(arg[3]),
+                     *reinterpret_cast<typename RemoveRef<typename List_Select<Args, 3>::Value>::Type *>(arg[4]),
+                     *reinterpret_cast<typename RemoveRef<typename List_Select<Args, 4>::Value>::Type *>(arg[5])), ApplyReturnValue<R>(arg[0]);
+        }
+    };
+    template<class Obj, typename Ret, typename Arg1, typename Arg2, typename Arg3, typename Arg4, typename Arg5, typename Arg6>
+    struct FunctionPointer<Ret (Obj::*) (Arg1, Arg2, Arg3, Arg4, Arg5, Arg6)>
+    {
+        typedef Obj Object;
+        typedef List<Arg1, List<Arg2, List<Arg3, List<Arg4, List<Arg5, List<Arg6, void> > > > > >  Arguments;
+        typedef Ret ReturnType;
+        typedef Ret (Obj::*Function) (Arg1, Arg2, Arg3, Arg4, Arg5, Arg6);
+        enum {ArgumentCount = 6};
+        template <typename Args, typename R>
+        static void call(Function f, Obj *o, void **arg) {
+            (o->*f)( *reinterpret_cast<typename RemoveRef<typename List_Select<Args, 0>::Value>::Type *>(arg[1]),
+                     *reinterpret_cast<typename RemoveRef<typename List_Select<Args, 1>::Value>::Type *>(arg[2]),
+                     *reinterpret_cast<typename RemoveRef<typename List_Select<Args, 2>::Value>::Type *>(arg[3]),
+                     *reinterpret_cast<typename RemoveRef<typename List_Select<Args, 3>::Value>::Type *>(arg[4]),
+                     *reinterpret_cast<typename RemoveRef<typename List_Select<Args, 4>::Value>::Type *>(arg[5]),
+                     *reinterpret_cast<typename RemoveRef<typename List_Select<Args, 5>::Value>::Type *>(arg[6])), ApplyReturnValue<R>(arg[0]);
+        }
+    };
+
+    template<typename Ret> struct FunctionPointer<Ret (*) ()>
+    {
+        typedef void Arguments;
+        typedef Ret (*Function) ();
+        typedef Ret ReturnType;
+        enum {ArgumentCount = 0};
+        template <typename Args, typename R>
+        static void call(Function f, void *, void **arg) { f(), ApplyReturnValue<R>(arg[0]); }
+    };
+    template<typename Ret, typename Arg1> struct FunctionPointer<Ret (*) (Arg1)>
+    {
+        typedef List<Arg1, void> Arguments;
+        typedef Ret ReturnType;
+        typedef Ret (*Function) (Arg1);
+        enum {ArgumentCount = 1};
+        template <typename Args, typename R>
+        static void call(Function f, void *, void **arg)
+        { f(*reinterpret_cast<typename RemoveRef<typename List_Select<Args, 0>::Value>::Type *>(arg[1])), ApplyReturnValue<R>(arg[0]); }
+    };
+    template<typename Ret, typename Arg1, typename Arg2> struct FunctionPointer<Ret (*) (Arg1, Arg2)>
+    {
+        typedef List<Arg1, List<Arg2, void> > Arguments;
+        typedef Ret ReturnType;
+        typedef Ret (*Function) (Arg1, Arg2);
+        enum {ArgumentCount = 2};
+        template <typename Args, typename R>
+        static void call(Function f, void *, void **arg) {
+            f(*reinterpret_cast<typename RemoveRef<typename List_Select<Args, 0>::Value>::Type *>(arg[1]),
+              *reinterpret_cast<typename RemoveRef<typename List_Select<Args, 1>::Value>::Type *>(arg[2])), ApplyReturnValue<R>(arg[0]); }
+    };
+    template<typename Ret, typename Arg1, typename Arg2, typename Arg3> struct FunctionPointer<Ret (*) (Arg1, Arg2, Arg3)>
+    {
+        typedef List<Arg1, List<Arg2, List<Arg3, void> > >  Arguments;
+        typedef Ret ReturnType;
+        typedef Ret (*Function) (Arg1, Arg2, Arg3);
+        enum {ArgumentCount = 3};
+        template <typename Args, typename R>
+        static void call(Function f, void *, void **arg) {
+            f(       *reinterpret_cast<typename RemoveRef<typename List_Select<Args, 0>::Value>::Type *>(arg[1]),
+                     *reinterpret_cast<typename RemoveRef<typename List_Select<Args, 1>::Value>::Type *>(arg[2]),
+                     *reinterpret_cast<typename RemoveRef<typename List_Select<Args, 2>::Value>::Type *>(arg[3])), ApplyReturnValue<R>(arg[0]);
+        }
+    };
+    template<typename Ret, typename Arg1, typename Arg2, typename Arg3, typename Arg4> struct FunctionPointer<Ret (*) (Arg1, Arg2, Arg3, Arg4)>
+    {
+        typedef List<Arg1, List<Arg2, List<Arg3, List<Arg4, void> > > >  Arguments;
+        typedef Ret ReturnType;
+        typedef Ret (*Function) (Arg1, Arg2, Arg3, Arg4);
+        enum {ArgumentCount = 4};
+        template <typename Args, typename R>
+        static void call(Function f, void *, void **arg) {
+            f(       *reinterpret_cast<typename RemoveRef<typename List_Select<Args, 0>::Value>::Type *>(arg[1]),
+                     *reinterpret_cast<typename RemoveRef<typename List_Select<Args, 1>::Value>::Type *>(arg[2]),
+                     *reinterpret_cast<typename RemoveRef<typename List_Select<Args, 2>::Value>::Type *>(arg[3]),
+                     *reinterpret_cast<typename RemoveRef<typename List_Select<Args, 3>::Value>::Type *>(arg[4])), ApplyReturnValue<R>(arg[0]);
+        }
+    };
+    template<typename Ret, typename Arg1, typename Arg2, typename Arg3, typename Arg4, typename Arg5> struct FunctionPointer<Ret (*) (Arg1, Arg2, Arg3, Arg4, Arg5)>
+    {
+        typedef List<Arg1, List<Arg2, List<Arg3,
+        List<Arg4, List<Arg5, void > > > > >  Arguments;
+        typedef Ret ReturnType;
+        typedef Ret (*Function) (Arg1, Arg2, Arg3, Arg4, Arg5);
+        enum {ArgumentCount = 5};
+        template <typename Args, typename R>
+        static void call(Function f, void *, void **arg) {
+            f(       *reinterpret_cast<typename RemoveRef<typename List_Select<Args, 0>::Value>::Type *>(arg[1]),
+                     *reinterpret_cast<typename RemoveRef<typename List_Select<Args, 1>::Value>::Type *>(arg[2]),
+                     *reinterpret_cast<typename RemoveRef<typename List_Select<Args, 2>::Value>::Type *>(arg[3]),
+                     *reinterpret_cast<typename RemoveRef<typename List_Select<Args, 3>::Value>::Type *>(arg[4]),
+                     *reinterpret_cast<typename RemoveRef<typename List_Select<Args, 4>::Value>::Type *>(arg[5])), ApplyReturnValue<R>(arg[0]);
+        }
+    };
+    template<typename Ret, typename Arg1, typename Arg2, typename Arg3, typename Arg4, typename Arg5, typename Arg6> struct FunctionPointer<Ret (*) (Arg1, Arg2, Arg3, Arg4, Arg5, Arg6)>
+    {
+        typedef List<Arg1, List<Arg2, List<Arg3, List<Arg4, List<Arg5, List<Arg6, void> > > > > >  Arguments;
+        typedef Ret ReturnType;
+        typedef Ret (*Function) (Arg1, Arg2, Arg3, Arg4, Arg5, Arg6);
+        enum {ArgumentCount = 6};
+        template <typename Args, typename R>
+        static void call(Function f, void *, void **arg) {
+            f(       *reinterpret_cast<typename RemoveRef<typename List_Select<Args, 0>::Value>::Type *>(arg[1]),
+                     *reinterpret_cast<typename RemoveRef<typename List_Select<Args, 1>::Value>::Type *>(arg[2]),
+                     *reinterpret_cast<typename RemoveRef<typename List_Select<Args, 2>::Value>::Type *>(arg[3]),
+                     *reinterpret_cast<typename RemoveRef<typename List_Select<Args, 3>::Value>::Type *>(arg[4]),
+                     *reinterpret_cast<typename RemoveRef<typename List_Select<Args, 4>::Value>::Type *>(arg[5]),
+                     *reinterpret_cast<typename RemoveRef<typename List_Select<Args, 5>::Value>::Type *>(arg[6])), ApplyReturnValue<R>(arg[0]);
+        }
+    };
+
+    template<typename F, int N> struct Functor;
+    template<typename Function> struct Functor<Function, 0>
+    {
+        template <typename Args, typename R>
+        static void call(Function &f, void *, void **arg) { f(), ApplyReturnValue<R>(arg[0]); }
+    };
+    template<typename Function> struct Functor<Function, 1>
+    {
+        template <typename Args, typename R>
+        static void call(Function &f, void *, void **arg) {
+            f(*reinterpret_cast<typename RemoveRef<typename List_Select<Args, 0>::Value>::Type *>(arg[1])), ApplyReturnValue<R>(arg[0]);
+        }
+    };
+    template<typename Function> struct Functor<Function, 2>
+    {
+        template <typename Args, typename R>
+        static void call(Function &f, void *, void **arg) {
+            f( *reinterpret_cast<typename RemoveRef<typename List_Select<Args, 0>::Value>::Type *>(arg[1]),
+               *reinterpret_cast<typename RemoveRef<typename List_Select<Args, 1>::Value>::Type *>(arg[2])), ApplyReturnValue<R>(arg[0]);
+        }
+    };
+    template<typename Function> struct Functor<Function, 3>
+    {
+        template <typename Args, typename R>
+        static void call(Function &f, void *, void **arg) {
+            f( *reinterpret_cast<typename RemoveRef<typename List_Select<Args, 0>::Value>::Type *>(arg[1]),
+               *reinterpret_cast<typename RemoveRef<typename List_Select<Args, 1>::Value>::Type *>(arg[2]),
+               *reinterpret_cast<typename RemoveRef<typename List_Select<Args, 2>::Value>::Type *>(arg[4])), ApplyReturnValue<R>(arg[0]);
+        }
+    };
+    template<typename Function> struct Functor<Function, 4>
+    {
+        template <typename Args, typename R>
+        static void call(Function &f, void *, void **arg) {
+            f( *reinterpret_cast<typename RemoveRef<typename List_Select<Args, 0>::Value>::Type *>(arg[1]),
+               *reinterpret_cast<typename RemoveRef<typename List_Select<Args, 1>::Value>::Type *>(arg[2]),
+               *reinterpret_cast<typename RemoveRef<typename List_Select<Args, 2>::Value>::Type *>(arg[3]),
+               *reinterpret_cast<typename RemoveRef<typename List_Select<Args, 3>::Value>::Type *>(arg[4])), ApplyReturnValue<R>(arg[0]);
+        }
+    };
+    template<typename Function> struct Functor<Function, 5>
+    {
+        template <typename Args, typename R>
+        static void call(Function &f, void *, void **arg) {
+            f( *reinterpret_cast<typename RemoveRef<typename List_Select<Args, 0>::Value>::Type *>(arg[1]),
+               *reinterpret_cast<typename RemoveRef<typename List_Select<Args, 1>::Value>::Type *>(arg[2]),
+               *reinterpret_cast<typename RemoveRef<typename List_Select<Args, 2>::Value>::Type *>(arg[3]),
+               *reinterpret_cast<typename RemoveRef<typename List_Select<Args, 3>::Value>::Type *>(arg[4]),
+               *reinterpret_cast<typename RemoveRef<typename List_Select<Args, 4>::Value>::Type *>(arg[5])), ApplyReturnValue<R>(arg[0]);
+        }
+    };
+    template<typename Function> struct Functor<Function, 6>
+    {
+        template <typename Args, typename R>
+        static void call(Function &f, void *, void **arg) {
+            f( *reinterpret_cast<typename RemoveRef<typename List_Select<Args, 0>::Value>::Type *>(arg[1]),
+               *reinterpret_cast<typename RemoveRef<typename List_Select<Args, 1>::Value>::Type *>(arg[2]),
+               *reinterpret_cast<typename RemoveRef<typename List_Select<Args, 2>::Value>::Type *>(arg[3]),
+               *reinterpret_cast<typename RemoveRef<typename List_Select<Args, 3>::Value>::Type *>(arg[4]),
+               *reinterpret_cast<typename RemoveRef<typename List_Select<Args, 4>::Value>::Type *>(arg[5]),
+               *reinterpret_cast<typename RemoveRef<typename List_Select<Args, 5>::Value>::Type *>(arg[6])), ApplyReturnValue<R>(arg[0]);
+        }
+    };
+#else
+    template <int...> struct IndexesList {};
+    template <typename IndexList, int Right> struct IndexesAppend;
+    template <int... Left, int Right> struct IndexesAppend<IndexesList<Left...>, Right>
+    { typedef IndexesList<Left..., Right> Value; };
+    template <int N> struct Indexes
+    { typedef typename IndexesAppend<typename Indexes<N - 1>::Value, N - 1>::Value Value; };
+    template <> struct Indexes<0> { typedef IndexesList<> Value; };
+    template<typename Func> struct FunctionPointer { enum {ArgumentCount = -1}; };
+
+    template <typename, typename, typename, typename> struct FunctorCall;
+    template <int... I, typename... SignalArgs, typename R, typename Function>
+    struct FunctorCall<IndexesList<I...>, List<SignalArgs...>, R, Function> {
+        static void call(Function f, void **arg) {
+            f((*reinterpret_cast<typename RemoveRef<SignalArgs>::Type *>(arg[I+1]))...), ApplyReturnValue<R>(arg[0]);
+        }
+    };
+    template <int... I, typename... SignalArgs, typename R, typename... SlotArgs, typename SlotRet, class Obj>
+    struct FunctorCall<IndexesList<I...>, List<SignalArgs...>, R, SlotRet (Obj::*)(SlotArgs...)> {
+        static void call(SlotRet (Obj::*f)(SlotArgs...), Obj *o, void **arg) {
+            (o->*f)((*reinterpret_cast<typename RemoveRef<SignalArgs>::Type *>(arg[I+1]))...), ApplyReturnValue<R>(arg[0]);
+        }
+    };
+
+    template<class Obj, typename Ret, typename... Args> struct FunctionPointer<Ret (Obj::*) (Args...)>
+    {
+        typedef Obj Object;
+        typedef List<Args...>  Arguments;
+        typedef Ret ReturnType;
+        typedef Ret (Obj::*Function) (Args...);
+        enum {ArgumentCount = sizeof...(Args)};
+        template <typename SignalArgs, typename R>
+        static void call(Function f, Obj *o, void **arg) {
+            FunctorCall<typename Indexes<ArgumentCount>::Value, SignalArgs, R, Function>::call(f, o, arg);
+        }
+    };
+
+    template<typename Ret, typename... Args> struct FunctionPointer<Ret (*) (Args...)>
+    {
+        typedef List<Args...> Arguments;
+        typedef Ret ReturnType;
+        typedef Ret (*Function) (Args...);
+        enum {ArgumentCount = sizeof...(Args)};
+        template <typename SignalArgs, typename R>
+        static void call(Function f, void *, void **arg) {
+            FunctorCall<typename Indexes<ArgumentCount>::Value, SignalArgs, R, Function>::call(f, arg);
+        }
+    };
+
+    template<typename Function, int N> struct Functor
+    {
+        template <typename SignalArgs, typename R>
+        static void call(Function &f, void *, void **arg) {
+            FunctorCall<typename Indexes<N>::Value, SignalArgs, R, Function>::call(f, arg);
+        }
+    };
+#endif
+
+    /*
+       Logic that check if the arguments of the slot matches the argument of the signal.
+       To be used like this:
+       Q_STATIC_ASSERT(CheckCompatibleArguments<FunctionPointer<Signal>::Arguments, FunctionPointer<Slot>::Arguments>::value)
+    */
+    template<typename A1, typename A2> struct AreArgumentsCompatible {
+        static int test(A2);
+        static char test(...);
+        static A1 dummy();
+        enum { value = sizeof(test(dummy())) == sizeof(int) };
+    };
+    template<typename A1, typename A2> struct AreArgumentsCompatible<A1, A2&> { enum { value = false }; };
+    template<typename A> struct AreArgumentsCompatible<A&, A&> { enum { value = true }; };
+    // void as a return value
+    template<typename A> struct AreArgumentsCompatible<void, A> { enum { value = true }; };
+    template<typename A> struct AreArgumentsCompatible<A, void> { enum { value = true }; };
+    template<> struct AreArgumentsCompatible<void, void> { enum { value = true }; };
+
+#ifndef Q_COMPILER_VARIADIC_TEMPLATES
+    template <typename List1, typename List2> struct CheckCompatibleArguments { enum { value = false }; };
+    template <> struct CheckCompatibleArguments<void, void> { enum { value = true }; };
+    template <typename List1> struct CheckCompatibleArguments<List1, void> { enum { value = true }; };
+    template <typename Arg1, typename Arg2, typename Tail1, typename Tail2> struct CheckCompatibleArguments<List<Arg1, Tail1>, List<Arg2, Tail2> >
+    {
+        enum { value = AreArgumentsCompatible<typename RemoveConstRef<Arg1>::Type, typename RemoveConstRef<Arg2>::Type>::value
+                    && CheckCompatibleArguments<Tail1, Tail2>::value };
+    };
+#else
+    template <typename List1, typename List2> struct CheckCompatibleArguments { enum { value = false }; };
+    template <> struct CheckCompatibleArguments<List<>, List<>> { enum { value = true }; };
+    template <typename List1> struct CheckCompatibleArguments<List1, List<>> { enum { value = true }; };
+    template <typename Arg1, typename Arg2, typename... Tail1, typename... Tail2>
+    struct CheckCompatibleArguments<List<Arg1, Tail1...>, List<Arg2, Tail2...>>
+    {
+        enum { value = AreArgumentsCompatible<typename RemoveConstRef<Arg1>::Type, typename RemoveConstRef<Arg2>::Type>::value
+                    && CheckCompatibleArguments<List<Tail1...>, List<Tail2...>>::value };
+    };
+
+#endif
+}
+
+
+QT_END_NAMESPACE
+
+QT_END_HEADER
+
+#endif