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Ignore:
Timestamp:
Nov 27, 2015, 4:19:06 PM (9 years ago)
Author:
muemart
Message:

Use variadic templates for Functor
Had to put on my template hat for this one… The only thing preventing it from supporting more than five parameters is the complete type erasure (see operator())
I also had to use type_index because you can't store type_info, so I changed the other functions too for consistency's sake

File:
1 edited

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  • code/branches/cpp11_v2/src/libraries/core/command/Functor.h

    r10845 r10876  
    116116#include "core/CorePrereqs.h"
    117117
    118 #include <typeinfo>
     118#include <array>
     119#include <typeindex>
     120#include <tuple>
    119121
    120122#include "util/Output.h"
    … …  
    219221
    220222            /// Returns the full identifier of the function-pointer which is defined as typeid(@a F), where @a F is the type of the stored function-pointer. Used to compare functors.
    221             virtual const std::type_info& getFullIdentifier() const = 0;
     223            virtual const std::type_index getFullIdentifier() const = 0;
    222224            /// Returns an identifier of the header of the function (doesn't include the function's class). Used to compare functors.
    223             virtual const std::type_info& getHeaderIdentifier() const = 0;
     225            virtual const std::type_index getHeaderIdentifier() const = 0;
    224226            /// Returns an identifier of the header of the function (doesn't include the function's class), but regards only the first @a params parameters. Used to compare functions if an Executor provides default-values for the other parameters.
    225             virtual const std::type_info& getHeaderIdentifier(unsigned int params) const = 0;
     227            virtual const std::type_index getHeaderIdentifier(unsigned int params) const = 0;
    226228    };
    227229
    … …  
    379381
    380382            // see Functor::getFullIdentifier()
    381             const std::type_info& getFullIdentifier() const
     383            const std::type_index getFullIdentifier() const
    382384                { return typeid(F); }
    383385
    … …  
    389391    {
    390392        // Helper class to get the type of the function pointer with the given class, parameters, return-value, and constness
    391         template <class R, class O, bool isconst, class P1, class P2, class P3, class P4, class P5> struct FunctionPointer                                            { typedef R (O::*Type)(P1, P2, P3, P4, P5); };
    392         template <class R, class O, class P1, class P2, class P3, class P4, class P5>               struct FunctionPointer<R, O, false, P1, P2, P3, P4, P5>           { typedef R (O::*Type)(P1, P2, P3, P4, P5); };
    393         template <class R, class O, class P1, class P2, class P3, class P4>                         struct FunctionPointer<R, O, false, P1, P2, P3, P4, void>         { typedef R (O::*Type)(P1, P2, P3, P4); };
    394         template <class R, class O, class P1, class P2, class P3>                                   struct FunctionPointer<R, O, false, P1, P2, P3, void, void>       { typedef R (O::*Type)(P1, P2, P3); };
    395         template <class R, class O, class P1, class P2>                                             struct FunctionPointer<R, O, false, P1, P2, void, void, void>     { typedef R (O::*Type)(P1, P2); };
    396         template <class R, class O, class P1>                                                       struct FunctionPointer<R, O, false, P1, void, void, void, void>   { typedef R (O::*Type)(P1); };
    397         template <class R, class O>                                                                 struct FunctionPointer<R, O, false, void, void, void, void, void> { typedef R (O::*Type)(); };
    398         template <class R, class O, class P1, class P2, class P3, class P4, class P5> struct FunctionPointer<R, O, true, P1, P2, P3, P4, P5>           { typedef R (O::*Type)(P1, P2, P3, P4, P5) const; };
    399         template <class R, class O, class P1, class P2, class P3, class P4>           struct FunctionPointer<R, O, true, P1, P2, P3, P4, void>         { typedef R (O::*Type)(P1, P2, P3, P4) const; };
    400         template <class R, class O, class P1, class P2, class P3>                     struct FunctionPointer<R, O, true, P1, P2, P3, void, void>       { typedef R (O::*Type)(P1, P2, P3) const; };
    401         template <class R, class O, class P1, class P2>                               struct FunctionPointer<R, O, true, P1, P2, void, void, void>     { typedef R (O::*Type)(P1, P2) const; };
    402         template <class R, class O, class P1>                                         struct FunctionPointer<R, O, true, P1, void, void, void, void>   { typedef R (O::*Type)(P1) const; };
    403         template <class R, class O>                                                   struct FunctionPointer<R, O, true, void, void, void, void, void> { typedef R (O::*Type)() const; };
    404         template <class R, class P1, class P2, class P3, class P4, class P5> struct FunctionPointer<R, void, false, P1, P2, P3, P4, P5>           { typedef R (*Type)(P1, P2, P3, P4, P5); };
    405         template <class R, class P1, class P2, class P3, class P4>           struct FunctionPointer<R, void, false, P1, P2, P3, P4, void>         { typedef R (*Type)(P1, P2, P3, P4); };
    406         template <class R, class P1, class P2, class P3>                     struct FunctionPointer<R, void, false, P1, P2, P3, void, void>       { typedef R (*Type)(P1, P2, P3); };
    407         template <class R, class P1, class P2>                               struct FunctionPointer<R, void, false, P1, P2, void, void, void>     { typedef R (*Type)(P1, P2); };
    408         template <class R, class P1>                                         struct FunctionPointer<R, void, false, P1, void, void, void, void>   { typedef R (*Type)(P1); };
    409         template <class R>                                                   struct FunctionPointer<R, void, false, void, void, void, void, void> { typedef R (*Type)(); };
     393        template <class R, class O, bool isconst, class... Params> struct FunctionPointer                                   { typedef R (O::*Type)(Params...); };
     394        template <class R, class O, class... Params>               struct FunctionPointer<R, O, true, Params...>            { typedef R (O::*Type)(Params...) const; };
     395        template <class R, class... Params>                        struct FunctionPointer<R, void, false, Params...>        { typedef R (*Type)(Params...); };
    410396
    411397        // Helper class, used to call a function-pointer with a given object and parameters and to return its return-value (if available)
    412         template <class R, class O, bool isconst, class P1, class P2, class P3, class P4, class P5> struct FunctorCaller                                              { static inline MultiType call(typename detail::FunctionPointer<R, O, isconst, P1, P2, P3, P4, P5>::Type functionPointer, O* object, const MultiType& param1, const MultiType& param2, const MultiType& param3, const MultiType& param4, const MultiType& param5) { return (object->*functionPointer)(param1, param2, param3, param4, param5); } };
    413         template <class R, class O, bool isconst, class P1, class P2, class P3, class P4>           struct FunctorCaller<R, O, isconst, P1, P2, P3, P4, void>         { static inline MultiType call(typename detail::FunctionPointer<R, O, isconst, P1, P2, P3, P4, void>::Type functionPointer, O* object, const MultiType& param1, const MultiType& param2, const MultiType& param3, const MultiType& param4, const MultiType&) { return (object->*functionPointer)(param1, param2, param3, param4); } };
    414         template <class R, class O, bool isconst, class P1, class P2, class P3>                     struct FunctorCaller<R, O, isconst, P1, P2, P3, void, void>       { static inline MultiType call(typename detail::FunctionPointer<R, O, isconst, P1, P2, P3, void, void>::Type functionPointer, O* object, const MultiType& param1, const MultiType& param2, const MultiType& param3, const MultiType&, const MultiType&) { return (object->*functionPointer)(param1, param2, param3); } };
    415         template <class R, class O, bool isconst, class P1, class P2>                               struct FunctorCaller<R, O, isconst, P1, P2, void, void, void>     { static inline MultiType call(typename detail::FunctionPointer<R, O, isconst, P1, P2, void, void, void>::Type functionPointer, O* object, const MultiType& param1, const MultiType& param2, const MultiType&, const MultiType&, const MultiType&) { return (object->*functionPointer)(param1, param2); } };
    416         template <class R, class O, bool isconst, class P1>                                         struct FunctorCaller<R, O, isconst, P1, void, void, void, void>   { static inline MultiType call(typename detail::FunctionPointer<R, O, isconst, P1, void, void, void, void>::Type functionPointer, O* object, const MultiType& param1, const MultiType&, const MultiType&, const MultiType&, const MultiType&) { return (object->*functionPointer)(param1); } };
    417         template <class R, class O, bool isconst>                                                   struct FunctorCaller<R, O, isconst, void, void, void, void, void> { static inline MultiType call(typename detail::FunctionPointer<R, O, isconst, void, void, void, void, void>::Type functionPointer, O* object, const MultiType&, const MultiType&, const MultiType&, const MultiType&, const MultiType&) { return (object->*functionPointer)(); } };
    418         template <class O, bool isconst, class P1, class P2, class P3, class P4, class P5> struct FunctorCaller<void, O, isconst, P1, P2, P3, P4, P5>           { static inline MultiType call(typename detail::FunctionPointer<void, O, isconst, P1, P2, P3, P4, P5>::Type functionPointer, O* object, const MultiType& param1, const MultiType& param2, const MultiType& param3, const MultiType& param4, const MultiType& param5) { (object->*functionPointer)(param1, param2, param3, param4, param5); return MultiType::Null; } };
    419         template <class O, bool isconst, class P1, class P2, class P3, class P4>           struct FunctorCaller<void, O, isconst, P1, P2, P3, P4, void>         { static inline MultiType call(typename detail::FunctionPointer<void, O, isconst, P1, P2, P3, P4, void>::Type functionPointer, O* object, const MultiType& param1, const MultiType& param2, const MultiType& param3, const MultiType& param4, const MultiType&) { (object->*functionPointer)(param1, param2, param3, param4); return MultiType::Null; } };
    420         template <class O, bool isconst, class P1, class P2, class P3>                     struct FunctorCaller<void, O, isconst, P1, P2, P3, void, void>       { static inline MultiType call(typename detail::FunctionPointer<void, O, isconst, P1, P2, P3, void, void>::Type functionPointer, O* object, const MultiType& param1, const MultiType& param2, const MultiType& param3, const MultiType&, const MultiType&) { (object->*functionPointer)(param1, param2, param3); return MultiType::Null; } };
    421         template <class O, bool isconst, class P1, class P2>                               struct FunctorCaller<void, O, isconst, P1, P2, void, void, void>     { static inline MultiType call(typename detail::FunctionPointer<void, O, isconst, P1, P2, void, void, void>::Type functionPointer, O* object, const MultiType& param1, const MultiType& param2, const MultiType&, const MultiType&, const MultiType&) { (object->*functionPointer)(param1, param2); return MultiType::Null; } };
    422         template <class O, bool isconst, class P1>                                         struct FunctorCaller<void, O, isconst, P1, void, void, void, void>   { static inline MultiType call(typename detail::FunctionPointer<void, O, isconst, P1, void, void, void, void>::Type functionPointer, O* object, const MultiType& param1, const MultiType&, const MultiType&, const MultiType&, const MultiType&) { (object->*functionPointer)(param1); return MultiType::Null; } };
    423         template <class O, bool isconst>                                                   struct FunctorCaller<void, O, isconst, void, void, void, void, void> { static inline MultiType call(typename detail::FunctionPointer<void, O, isconst, void, void, void, void, void>::Type functionPointer, O* object, const MultiType&, const MultiType&, const MultiType&, const MultiType&, const MultiType&) { (object->*functionPointer)(); return MultiType::Null; } };
    424         template <class R, bool isconst, class P1, class P2, class P3, class P4, class P5> struct FunctorCaller<R, void, isconst, P1, P2, P3, P4, P5>           { static inline MultiType call(typename detail::FunctionPointer<R, void, isconst, P1, P2, P3, P4, P5>::Type functionPointer, void*, const MultiType& param1, const MultiType& param2, const MultiType& param3, const MultiType& param4, const MultiType& param5) { return (*functionPointer)(param1, param2, param3, param4, param5); } };
    425         template <class R, bool isconst, class P1, class P2, class P3, class P4>           struct FunctorCaller<R, void, isconst, P1, P2, P3, P4, void>         { static inline MultiType call(typename detail::FunctionPointer<R, void, isconst, P1, P2, P3, P4, void>::Type functionPointer, void*, const MultiType& param1, const MultiType& param2, const MultiType& param3, const MultiType& param4, const MultiType&) { return (*functionPointer)(param1, param2, param3, param4); } };
    426         template <class R, bool isconst, class P1, class P2, class P3>                     struct FunctorCaller<R, void, isconst, P1, P2, P3, void, void>       { static inline MultiType call(typename detail::FunctionPointer<R, void, isconst, P1, P2, P3, void, void>::Type functionPointer, void*, const MultiType& param1, const MultiType& param2, const MultiType& param3, const MultiType&, const MultiType&) { return (*functionPointer)(param1, param2, param3); } };
    427         template <class R, bool isconst, class P1, class P2>                               struct FunctorCaller<R, void, isconst, P1, P2, void, void, void>     { static inline MultiType call(typename detail::FunctionPointer<R, void, isconst, P1, P2, void, void, void>::Type functionPointer, void*, const MultiType& param1, const MultiType& param2, const MultiType&, const MultiType&, const MultiType&) { return (*functionPointer)(param1, param2); } };
    428         template <class R, bool isconst, class P1>                                         struct FunctorCaller<R, void, isconst, P1, void, void, void, void>   { static inline MultiType call(typename detail::FunctionPointer<R, void, isconst, P1, void, void, void, void>::Type functionPointer, void*, const MultiType& param1, const MultiType&, const MultiType&, const MultiType&, const MultiType&) { return (*functionPointer)(param1); } };
    429         template <class R, bool isconst>                                                   struct FunctorCaller<R, void, isconst, void, void, void, void, void> { static inline MultiType call(typename detail::FunctionPointer<R, void, isconst, void, void, void, void, void>::Type functionPointer, void*, const MultiType&, const MultiType&, const MultiType&, const MultiType&, const MultiType&) { return (*functionPointer)(); } };
    430         template <bool isconst, class P1, class P2, class P3, class P4, class P5> struct FunctorCaller<void, void, isconst, P1, P2, P3, P4, P5>           { static inline MultiType call(typename detail::FunctionPointer<void, void, isconst, P1, P2, P3, P4, P5>::Type functionPointer, void*, const MultiType& param1, const MultiType& param2, const MultiType& param3, const MultiType& param4, const MultiType& param5) { (*functionPointer)(param1, param2, param3, param4, param5); return MultiType::Null; } };
    431         template <bool isconst, class P1, class P2, class P3, class P4>           struct FunctorCaller<void, void, isconst, P1, P2, P3, P4, void>         { static inline MultiType call(typename detail::FunctionPointer<void, void, isconst, P1, P2, P3, P4, void>::Type functionPointer, void*, const MultiType& param1, const MultiType& param2, const MultiType& param3, const MultiType& param4, const MultiType&) { (*functionPointer)(param1, param2, param3, param4); return MultiType::Null; } };
    432         template <bool isconst, class P1, class P2, class P3>                     struct FunctorCaller<void, void, isconst, P1, P2, P3, void, void>       { static inline MultiType call(typename detail::FunctionPointer<void, void, isconst, P1, P2, P3, void, void>::Type functionPointer, void*, const MultiType& param1, const MultiType& param2, const MultiType& param3, const MultiType&, const MultiType&) { (*functionPointer)(param1, param2, param3); return MultiType::Null; } };
    433         template <bool isconst, class P1, class P2>                               struct FunctorCaller<void, void, isconst, P1, P2, void, void, void>     { static inline MultiType call(typename detail::FunctionPointer<void, void, isconst, P1, P2, void, void, void>::Type functionPointer, void*, const MultiType& param1, const MultiType& param2, const MultiType&, const MultiType&, const MultiType&) { (*functionPointer)(param1, param2); return MultiType::Null; } };
    434         template <bool isconst, class P1>                                         struct FunctorCaller<void, void, isconst, P1, void, void, void, void>   { static inline MultiType call(typename detail::FunctionPointer<void, void, isconst, P1, void, void, void, void>::Type functionPointer, void*, const MultiType& param1, const MultiType&, const MultiType&, const MultiType&, const MultiType&) { (*functionPointer)(param1); return MultiType::Null; } };
    435         template <bool isconst>                                                   struct FunctorCaller<void, void, isconst, void, void, void, void, void> { static inline MultiType call(typename detail::FunctionPointer<void, void, isconst, void, void, void, void, void>::Type functionPointer, void*, const MultiType&, const MultiType&, const MultiType&, const MultiType&, const MultiType&) { (*functionPointer)(); return MultiType::Null; } };
     398        template <class R, class O, bool isconst, class... Params>         struct FunctorCaller                                        { static inline MultiType call(typename detail::FunctionPointer<R, O, isconst, Params...>::Type functionPointer, O* object, const Params&... parameters)    { return (object->*functionPointer)(parameters...); } };
     399        template <class O, bool isconst, class... Params>                  struct FunctorCaller<void, O, isconst, Params...>           { static inline MultiType call(typename detail::FunctionPointer<void, O, isconst, Params...>::Type functionPointer, O* object, const Params&... parameters) { (object->*functionPointer)(parameters...); return MultiType::Null; } };
     400        template <class R, bool isconst, class... Params>                  struct FunctorCaller<R, void, isconst, Params...>           { static inline MultiType call(typename detail::FunctionPointer<R, void, isconst, Params...>::Type functionPointer, void*, const Params&... parameters)     { return (*functionPointer)(parameters...); } };
     401        template <bool isconst, class... Params>                           struct FunctorCaller<void, void, isconst, Params...>        { static inline MultiType call(typename detail::FunctionPointer<void, void, isconst, Params...>::Type functionPointer, void*, const Params&... parameters)  { (*functionPointer)(parameters...); return MultiType::Null; } };
    436402
    437403        // Helper class, used to identify the header of a function-pointer (independent of its class)
    438         template <class R, class P1, class P2, class P3, class P4, class P5>
     404        template <class R, class... Params>
    439405        struct FunctorHeaderIdentifier
    440406        {};
    … …  
    448414        { enum { result = false }; };
    449415
    450         // Helper class to count the number of parameters
    451         template <class P1, class P2, class P3, class P4, class P5>
    452         struct FunctorParamCount
    453         { enum { result = 5 }; };
    454         template <class P1, class P2, class P3, class P4>
    455         struct FunctorParamCount<P1, P2, P3, P4, void>
    456         { enum { result = 4 }; };
    457         template <class P1, class P2, class P3>
    458         struct FunctorParamCount<P1, P2, P3, void, void>
    459         { enum { result = 3 }; };
    460         template <class P1, class P2>
    461         struct FunctorParamCount<P1, P2, void, void, void>
    462         { enum { result = 2 }; };
    463         template <class P1>
    464         struct FunctorParamCount<P1, void, void, void, void>
    465         { enum { result = 1 }; };
    466         template <>
    467         struct FunctorParamCount<void, void, void, void, void>
    468         { enum { result = 0 }; };
     416        //Barebones implementation of (make_)index_sequence for C++11
     417        template <std::size_t...> struct index_sequence {};
     418
     419        template <std::size_t N, std::size_t... Is>
     420        struct make_index_sequence : make_index_sequence<N - 1, N - 1, Is...> {};
     421
     422        template <std::size_t... Is>
     423        struct make_index_sequence<0u, Is...> : index_sequence<Is...> {};
     424
     425        //Helper structs to deduce the first N types of a parameter pack
     426        template<class... Types> struct type_list {};
     427
     428        template <class T1, class... AllTypes>
     429        struct make_type_list_helper
     430        {
     431            template <std::size_t N, class... Types>
     432            struct make_type_list_impl : make_type_list_helper<AllTypes...>::template make_type_list_impl<N - 1, Types..., T1> {};
     433
     434            template <class... Types>
     435            struct make_type_list_impl<1u, Types...> : type_list<Types..., T1> {};
     436        };
     437
     438        template <std::size_t N, class... Types>
     439        struct make_type_list : make_type_list_helper<Types...>::template make_type_list_impl<N> {};
     440
     441        template <class... Types>
     442        struct make_type_list<0u, Types...> : type_list<> {};
    469443    }
    470444
    … …  
    489463        All template arguments can be void.
    490464    */
    491     template <class R, class O, bool isconst, class P1, class P2, class P3, class P4, class P5>
    492     class FunctorTemplate : public FunctorPointer<typename detail::FunctionPointer<R, O, isconst, P1, P2, P3, P4, P5>::Type, O>
    493     {
     465    template <class R, class O, bool isconst, class... Params>
     466    class FunctorTemplate : public FunctorPointer<typename detail::FunctionPointer<R, O, isconst, Params...>::Type, O>
     467    {
     468        static_assert(sizeof...(Params) <= 5, "Only up to 5 parameters are supported");
     469
    494470        public:
    495471            /// Constructor: Initializes the base class.
    496             FunctorTemplate(typename detail::FunctionPointer<R, O, isconst, P1, P2, P3, P4, P5>::Type functionPointer, O* object = nullptr) : FunctorPointer<typename detail::FunctionPointer<R, O, isconst, P1, P2, P3, P4, P5>::Type, O>(functionPointer, object) {}
     472            FunctorTemplate(typename detail::FunctionPointer<R, O, isconst, Params...>::Type functionPointer, O* object = nullptr) : FunctorPointer<typename detail::FunctionPointer<R, O, isconst, Params...>::Type, O>(functionPointer, object) {}
    497473
    498474            // see FunctorMember::operator()()
    499             MultiType operator()(O* object, const MultiType& param1 = MultiType::Null, const MultiType& param2 = MultiType::Null, const MultiType& param3 = MultiType::Null, const MultiType& param4 = MultiType::Null, const MultiType& param5 = MultiType::Null)
    500             {
    501                 return detail::FunctorCaller<R, O, isconst, P1, P2, P3, P4, P5>::call(this->functionPointer_, object, param1, param2, param3, param4, param5);
     475            virtual MultiType operator()(O* object, const MultiType& param1 = MultiType::Null, const MultiType& param2 = MultiType::Null, const MultiType& param3 = MultiType::Null, const MultiType& param4 = MultiType::Null, const MultiType& param5 = MultiType::Null) override
     476            {
     477                auto multis = std::make_tuple(param1, param2, param3, param4, param5);
     478                return callHelper(object, multis, detail::make_index_sequence<sizeof...(Params)>{});
    502479            }
    503480
    504481            // see Functor::clone()
    505             FunctorPtr clone()
     482            virtual FunctorPtr clone() override
    506483            {
    507484                return std::make_shared<FunctorTemplate>(*this);
    … …  
    509486
    510487            // see Functor::evaluateArgument()
    511             void evaluateArgument(unsigned int index, MultiType& argument) const
    512             {
    513                 switch (index)
     488            virtual void evaluateArgument(unsigned int index, MultiType& argument) const override
     489            {
     490                static const std::array<std::function<bool(MultiType&)>, sizeof...(Params)> funcs = {&MultiType::convert<Params>...};
     491                if (index < funcs.size())
    514492                {
    515                     case 0: argument.convert<P1>(); break;
    516                     case 1: argument.convert<P2>(); break;
    517                     case 2: argument.convert<P3>(); break;
    518                     case 3: argument.convert<P4>(); break;
    519                     case 4: argument.convert<P5>(); break;
     493                    funcs[index](argument);
    520494                }
    521495            }
    522496
    523497            // see Functor::getParamCount()
    524             unsigned int getParamCount() const
    525             {
    526                 return detail::FunctorParamCount<P1, P2, P3, P4, P5>::result;
     498            virtual unsigned int getParamCount() const override
     499            {
     500                return sizeof...(Params);
    527501            }
    528502
    529503            // see Functor::hasReturnvalue()
    530             bool hasReturnvalue() const
     504            virtual bool hasReturnvalue() const override
    531505            {
    532506                return detail::FunctorHasReturnvalue<R>::result;
    … …  
    534508
    535509            // see Functor::getTypenameParam()
    536             std::string getTypenameParam(unsigned int index) const
    537             {
    538                 switch (index)
     510            virtual std::string getTypenameParam(unsigned int index) const override
     511            {
     512                static const std::array<std::string, sizeof...(Params)> names = { typeToString<Params>()... };
     513                if (index >= names.size())
    539514                {
    540                     case 0:  return typeToString<P1>();
    541                     case 1:  return typeToString<P2>();
    542                     case 2:  return typeToString<P3>();
    543                     case 3:  return typeToString<P4>();
    544                     case 4:  return typeToString<P5>();
    545                     default: return "";
     515                    return "";
    546516                }
     517                return names[index];
    547518            }
    548519
    549520            // see Functor::getTypenameReturnvalue()
    550             std::string getTypenameReturnvalue() const
     521            virtual std::string getTypenameReturnvalue() const override
    551522            {
    552523                return typeToString<R>();
    … …  
    554525
    555526            // see Functor::getHeaderIdentifier()
    556             const std::type_info& getHeaderIdentifier() const
    557             {
    558                 return typeid(detail::FunctorHeaderIdentifier<R, P1, P2, P3, P4, P5>);
     527            virtual const std::type_index getHeaderIdentifier() const override
     528            {
     529                return typeid(detail::FunctorHeaderIdentifier<R, Params...>);
    559530            }
    560531
    561532            // see Functor::getHeaderIdentifier(unsigned int)
    562             const std::type_info& getHeaderIdentifier(unsigned int params) const
    563             {
    564                 switch (params)
     533            virtual const std::type_index getHeaderIdentifier(unsigned int params) const override
     534            {
     535                //+1 because e.g. for two parameters, we want typeids for zero, one, or two parameters
     536                return getHeaderIdentifierHelper(params, detail::make_index_sequence<sizeof...(Params) + 1>{});
     537            }
     538
     539    private:
     540
     541            /// Helper function that extracts index numbers of parameters from a tuple. Needed to call the function pointer with the correct amount of arguments.
     542            template<typename Tup, std::size_t... index>
     543            MultiType callHelper(O* object, Tup&& tup, detail::index_sequence<index...>)
     544            {
     545                return detail::FunctorCaller<R, O, isconst, Params...>::call(this->functionPointer_, object, std::get<index>(std::forward<Tup>(tup))...);
     546            }
     547
     548            /// Helper function to extract all identifiers of the function pointer using a deduced index sequence
     549            template<std::size_t... index>
     550            const std::type_index& getHeaderIdentifierHelper(unsigned int params, detail::index_sequence<index...>) const
     551            {
     552                static const std::array<const std::type_index, sizeof...(index)> typeinfos = { getTypelistIdentifier(detail::make_type_list<index, Params...>{})... };
     553                if (params >= typeinfos.size())
    565554                {
    566                     case 0:  return typeid(detail::FunctorHeaderIdentifier<R, void, void, void, void, void>);
    567                     case 1:  return typeid(detail::FunctorHeaderIdentifier<R, P1, void, void, void, void>);
    568                     case 2:  return typeid(detail::FunctorHeaderIdentifier<R, P1, P2, void, void, void>);
    569                     case 3:  return typeid(detail::FunctorHeaderIdentifier<R, P1, P2, P3, void, void>);
    570                     case 4:  return typeid(detail::FunctorHeaderIdentifier<R, P1, P2, P3, P4, void>);
    571                     default: return typeid(detail::FunctorHeaderIdentifier<R, P1, P2, P3, P4, P5>);
     555                    return typeinfos.back();
    572556                }
     557                return typeinfos[params];
     558            }
     559
     560            ///Helper function that deduces a parameter pack of types and returns the corresponding identifier
     561            template<class... Types>
     562            const std::type_index getTypelistIdentifier(detail::type_list<Types...>) const
     563            {
     564                return typeid(detail::FunctorHeaderIdentifier<R, Types...>);
    573565            }
    574566    };
    575567
    576     template <class R, class O, class OO, class P1, class P2, class P3, class P4, class P5> inline FunctorMemberPtr<O> createFunctor(R (O::*functionPointer)(P1, P2, P3, P4, P5), OO* object) { return std::make_shared<FunctorTemplate<R, O, false, P1, P2, P3, P4, P5>>(functionPointer, object); }   ///< Creates a new FunctorMember with the given function-pointer and an assigned object
    577     template <class R, class O, class OO, class P1, class P2, class P3, class P4>           inline FunctorMemberPtr<O> createFunctor(R (O::*functionPointer)(P1, P2, P3, P4), OO* object)     { return std::make_shared<FunctorTemplate<R, O, false, P1, P2, P3, P4, void>>(functionPointer, object); }   ///< Creates a new FunctorMember with the given function-pointer and an assigned object
    578     template <class R, class O, class OO, class P1, class P2, class P3>                     inline FunctorMemberPtr<O> createFunctor(R (O::*functionPointer)(P1, P2, P3), OO* object)         { return std::make_shared<FunctorTemplate<R, O, false, P1, P2, P3, void, void>>(functionPointer, object); }   ///< Creates a new FunctorMember with the given function-pointer and an assigned object
    579     template <class R, class O, class OO, class P1, class P2>                               inline FunctorMemberPtr<O> createFunctor(R (O::*functionPointer)(P1, P2), OO* object)             { return std::make_shared<FunctorTemplate<R, O, false, P1, P2, void, void, void>>(functionPointer, object); }   ///< Creates a new FunctorMember with the given function-pointer and an assigned object
    580     template <class R, class O, class OO, class P1>                                         inline FunctorMemberPtr<O> createFunctor(R (O::*functionPointer)(P1), OO* object)                 { return std::make_shared<FunctorTemplate<R, O, false, P1, void, void, void, void>>(functionPointer, object); }   ///< Creates a new FunctorMember with the given function-pointer and an assigned object
    581     template <class R, class O, class OO>                                                   inline FunctorMemberPtr<O> createFunctor(R (O::*functionPointer)(), OO* object)                   { return std::make_shared<FunctorTemplate<R, O, false, void, void, void, void, void>>(functionPointer, object); }   ///< Creates a new FunctorMember with the given function-pointer and an assigned object
    582     template <class R, class O, class OO, class P1, class P2, class P3, class P4, class P5> inline FunctorMemberPtr<O> createFunctor(R (O::*functionPointer)(P1, P2, P3, P4, P5) const, OO* object) { return std::make_shared<FunctorTemplate<R, O, true, P1, P2, P3, P4, P5>>(functionPointer, object); }   ///< Creates a new FunctorMember with the given function-pointer and an assigned object
    583     template <class R, class O, class OO, class P1, class P2, class P3, class P4>           inline FunctorMemberPtr<O> createFunctor(R (O::*functionPointer)(P1, P2, P3, P4) const, OO* object)     { return std::make_shared<FunctorTemplate<R, O, true, P1, P2, P3, P4, void>>(functionPointer, object); }   ///< Creates a new FunctorMember with the given function-pointer and an assigned object
    584     template <class R, class O, class OO, class P1, class P2, class P3>                     inline FunctorMemberPtr<O> createFunctor(R (O::*functionPointer)(P1, P2, P3) const, OO* object)         { return std::make_shared<FunctorTemplate<R, O, true, P1, P2, P3, void, void>>(functionPointer, object); }   ///< Creates a new FunctorMember with the given function-pointer and an assigned object
    585     template <class R, class O, class OO, class P1, class P2>                               inline FunctorMemberPtr<O> createFunctor(R (O::*functionPointer)(P1, P2) const, OO* object)             { return std::make_shared<FunctorTemplate<R, O, true, P1, P2, void, void, void>>(functionPointer, object); }   ///< Creates a new FunctorMember with the given function-pointer and an assigned object
    586     template <class R, class O, class OO, class P1>                                         inline FunctorMemberPtr<O> createFunctor(R (O::*functionPointer)(P1) const, OO* object)                 { return std::make_shared<FunctorTemplate<R, O, true, P1, void, void, void, void>>(functionPointer, object); }   ///< Creates a new FunctorMember with the given function-pointer and an assigned object
    587     template <class R, class O, class OO>                                                   inline FunctorMemberPtr<O> createFunctor(R (O::*functionPointer)() const, OO* object)                   { return std::make_shared<FunctorTemplate<R, O, true, void, void, void, void, void>>(functionPointer, object); }   ///< Creates a new FunctorMember with the given function-pointer and an assigned object
    588 
    589     template <class R, class O, class P1, class P2, class P3, class P4, class P5> inline FunctorMemberPtr<O> createFunctor(R (O::*functionPointer)(P1, P2, P3, P4, P5)) { return std::make_shared<FunctorTemplate<R, O, false, P1, P2, P3, P4, P5>>(functionPointer); }   ///< Creates a new FunctorMember with the given function-pointer
    590     template <class R, class O, class P1, class P2, class P3, class P4>           inline FunctorMemberPtr<O> createFunctor(R (O::*functionPointer)(P1, P2, P3, P4))     { return std::make_shared<FunctorTemplate<R, O, false, P1, P2, P3, P4, void>>(functionPointer); }   ///< Creates a new FunctorMember with the given function-pointer
    591     template <class R, class O, class P1, class P2, class P3>                     inline FunctorMemberPtr<O> createFunctor(R (O::*functionPointer)(P1, P2, P3))         { return std::make_shared<FunctorTemplate<R, O, false, P1, P2, P3, void, void>>(functionPointer); }   ///< Creates a new FunctorMember with the given function-pointer
    592     template <class R, class O, class P1, class P2>                               inline FunctorMemberPtr<O> createFunctor(R (O::*functionPointer)(P1, P2))             { return std::make_shared<FunctorTemplate<R, O, false, P1, P2, void, void, void>>(functionPointer); }   ///< Creates a new FunctorMember with the given function-pointer
    593     template <class R, class O, class P1>                                         inline FunctorMemberPtr<O> createFunctor(R (O::*functionPointer)(P1))                 { return std::make_shared<FunctorTemplate<R, O, false, P1, void, void, void, void>>(functionPointer); }   ///< Creates a new FunctorMember with the given function-pointer
    594     template <class R, class O>                                                   inline FunctorMemberPtr<O> createFunctor(R (O::*functionPointer)())                   { return std::make_shared<FunctorTemplate<R, O, false, void, void, void, void, void>>(functionPointer); }   ///< Creates a new FunctorMember with the given function-pointer
    595     template <class R, class O, class P1, class P2, class P3, class P4, class P5> inline FunctorMemberPtr<O> createFunctor(R (O::*functionPointer)(P1, P2, P3, P4, P5) const) { return std::make_shared<FunctorTemplate<R, O, true, P1, P2, P3, P4, P5>>(functionPointer); }   ///< Creates a new FunctorMember with the given function-pointer
    596     template <class R, class O, class P1, class P2, class P3, class P4>           inline FunctorMemberPtr<O> createFunctor(R (O::*functionPointer)(P1, P2, P3, P4) const)     { return std::make_shared<FunctorTemplate<R, O, true, P1, P2, P3, P4, void>>(functionPointer); }   ///< Creates a new FunctorMember with the given function-pointer
    597     template <class R, class O, class P1, class P2, class P3>                     inline FunctorMemberPtr<O> createFunctor(R (O::*functionPointer)(P1, P2, P3) const)         { return std::make_shared<FunctorTemplate<R, O, true, P1, P2, P3, void, void>>(functionPointer); }   ///< Creates a new FunctorMember with the given function-pointer
    598     template <class R, class O, class P1, class P2>                               inline FunctorMemberPtr<O> createFunctor(R (O::*functionPointer)(P1, P2) const)             { return std::make_shared<FunctorTemplate<R, O, true, P1, P2, void, void, void>>(functionPointer); }   ///< Creates a new FunctorMember with the given function-pointer
    599     template <class R, class O, class P1>                                         inline FunctorMemberPtr<O> createFunctor(R (O::*functionPointer)(P1) const)                 { return std::make_shared<FunctorTemplate<R, O, true, P1, void, void, void, void>>(functionPointer); }   ///< Creates a new FunctorMember with the given function-pointer
    600     template <class R, class O>                                                   inline FunctorMemberPtr<O> createFunctor(R (O::*functionPointer)() const)                   { return std::make_shared<FunctorTemplate<R, O, true, void, void, void, void, void>>(functionPointer); }   ///< Creates a new FunctorMember with the given function-pointer
    601 
    602     template <class R, class P1, class P2, class P3, class P4, class P5> inline FunctorStaticPtr createFunctor(R (*functionPointer)(P1, P2, P3, P4, P5)) { return std::make_shared<FunctorTemplate<R, void, false, P1, P2, P3, P4, P5>>(functionPointer); }   ///< Creates a new Functor with the given function-pointer
    603     template <class R, class P1, class P2, class P3, class P4>           inline FunctorStaticPtr createFunctor(R (*functionPointer)(P1, P2, P3, P4))     { return std::make_shared<FunctorTemplate<R, void, false, P1, P2, P3, P4, void>>(functionPointer); }   ///< Creates a new Functor with the given function-pointer
    604     template <class R, class P1, class P2, class P3>                     inline FunctorStaticPtr createFunctor(R (*functionPointer)(P1, P2, P3))         { return std::make_shared<FunctorTemplate<R, void, false, P1, P2, P3, void, void>>(functionPointer); }   ///< Creates a new Functor with the given function-pointer
    605     template <class R, class P1, class P2>                               inline FunctorStaticPtr createFunctor(R (*functionPointer)(P1, P2))             { return std::make_shared<FunctorTemplate<R, void, false, P1, P2, void, void, void>>(functionPointer); }   ///< Creates a new Functor with the given function-pointer
    606     template <class R, class P1>                                         inline FunctorStaticPtr createFunctor(R (*functionPointer)(P1))                 { return std::make_shared<FunctorTemplate<R, void, false, P1, void, void, void, void>>(functionPointer); }   ///< Creates a new Functor with the given function-pointer
    607     template <class R>                                                   inline FunctorStaticPtr createFunctor(R (*functionPointer)())                   { return std::make_shared<FunctorTemplate<R, void, false, void, void, void, void, void>>(functionPointer); }   ///< Creates a new Functor with the given function-pointer
     568    template <class R, class O, class OO, class... Params> inline FunctorMemberPtr<O> createFunctor(R (O::*functionPointer)(Params...), OO* object) { return std::make_shared<FunctorTemplate<R, O, false, Params...>>(functionPointer, object); }   ///< Creates a new FunctorMember with the given function-pointer and an assigned object
     569    template <class R, class O, class OO, class... Params> inline FunctorMemberPtr<O> createFunctor(R (O::*functionPointer)(Params...) const, OO* object) { return std::make_shared<FunctorTemplate<R, O, true, Params...>>(functionPointer, object); }   ///< Creates a new FunctorMember with the given function-pointer and an assigned object
     570
     571    template <class R, class O, class... Params> inline FunctorMemberPtr<O> createFunctor(R (O::*functionPointer)(Params...)) { return std::make_shared<FunctorTemplate<R, O, false, Params...>>(functionPointer); }   ///< Creates a new FunctorMember with the given function-pointer
     572    template <class R, class O, class... Params> inline FunctorMemberPtr<O> createFunctor(R (O::*functionPointer)(Params...) const) { return std::make_shared<FunctorTemplate<R, O, true, Params...>>(functionPointer); }   ///< Creates a new FunctorMember with the given function-pointer
     573
     574    template <class R, class... Params> inline FunctorStaticPtr createFunctor(R (*functionPointer)(Params...)) { return std::make_shared<FunctorTemplate<R, void, false, Params...>>(functionPointer); }   ///< Creates a new Functor with the given function-pointer
    608575}
    609576
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