#include <cstdint>
#include <array>
#include <iostream>
#include <tuple>
#include <type_traits>
/////////////////////////
#if 1 // multiple dispatch
// sequence of size_t // not in C++11
template <std::size_t ...> struct index_sequence {};
// Create index_sequence<0, >
template <std::size_t N, std::size_t ...Is>
struct make_index_sequence : make_index_sequence <N - 1, N - 1, Is... > {};
template <std::size_t ... Is>
struct make_index_sequence<0, Is...> : index_sequence<Is...> {};
// Generic IVisitor
// Do: using MyIVisitor = IVisitorTs<Child1, Child2, ...>
template <typename ... Ts> class IVisitorTs;
template <typename T, typename ... Ts>
class IVisitorTs<T, Ts...> : public IVisitorTs<Ts...>
{
public:
using tuple_type = std::tuple<T, Ts...>;
using IVisitorTs<Ts...>::visit;
virtual void visit(const T& t) = 0;
};
template <typename T> class IVisitorTs<T>
{
public:
using tuple_type = std::tuple<T>;
virtual void visit(const T& t) = 0;
};
namespace detail {
// retrieve the index of T in Ts...
template <typename T, typename ... Ts> struct get_index;
template <typename T, typename ... Ts>
struct get_index<T, T, Ts...> : std::integral_constant<std::size_t, 0> {};
template <typename T, typename Tail, typename ... Ts>
struct get_index<T, Tail, Ts...> :
std::integral_constant < std::size_t, 1 + get_index<T, Ts...>::value > {};
// retrieve the index of T in Tuple<Ts...>
template <typename T, typename Tuple> struct get_index_in_tuple;
template <typename T, template <typename...> class C, typename ... Ts>
struct get_index_in_tuple<T, C<Ts...>> : get_index<T, Ts...> {};
// get element of a multiarray
template <std::size_t I>
struct multi_array_getter
{
template <typename T, std::size_t N>
static constexpr auto get(const T& a, const std::array<std::size_t, N>& index)
-> decltype(multi_array_getter<I - 1>::get(a[index[N - I]], index))
{
return multi_array_getter<I - 1>::get(a[index[N - I]], index);
}
};
template <>
struct multi_array_getter<0>
{
template <typename T, std::size_t N>
static constexpr auto get(const T& a, const std::array<std::size_t, N>& index)
-> decltype(a)
{
return a;
}
};
// Provide an implementation of visitor
// by forwarding to C implementation (which may be non virtual)
template <typename IVisitor, typename C, typename...Ts> struct IVisitorImpl;
template <typename IVisitor, typename C, typename T, typename...Ts>
struct IVisitorImpl<IVisitor, C, T, Ts...> : IVisitorImpl<IVisitor, C, Ts...>
{
virtual void visit(const T& t) override { C::visit(t); }
};
template <typename IVisitor, typename C, typename T>
struct IVisitorImpl<IVisitor, C, T> : IVisitor, C
{
virtual void visit(const T& t) override { C::visit(t); }
};
// helper to expand child type to IVisitorImpl
template <typename IVisitor, typename C>
struct IVisitorImplType;
template <typename ... Ts, typename C>
struct IVisitorImplType<IVisitorTs<Ts...>, C>
{
using type = IVisitorImpl<IVisitorTs<Ts...>, C, Ts...>;
};
// Create an multi array of pointer of function
// (with all combinaisons of overload).
template <typename Ret, typename F, typename Arg>
class GetAllOverload
{
private:
template <typename...Ts>
struct Functor
{
// function which will be in array.
static Ret call(F&f, const Arg& arg)
{
return call_helper(f, arg, make_index_sequence<sizeof...(Ts)>());
}
private:
// The final dispatched function
template <std::size_t ... Is>
static Ret call_helper(F&f, const Arg& arg, index_sequence<Is...>)
{
using RetTuple = std::tuple<Ts&...>;
// static cast is suffisant if arg is the abstract type
// when given arg is concrete type, reinterpret_cast is required.
// TODO: build a smaller table with only possible value to avoid that
return f(reinterpret_cast<typename std::tuple_element<Is, RetTuple>::type>(std::get<Is>(arg))...);
}
};
// helper class to create the multi array of function pointer
template <std::size_t N, typename Tuple, typename...Ts>
struct Builder;
template <typename...Ts, typename...Ts2>
struct Builder<1, std::tuple<Ts...>, Ts2...>
{
using RetType = std::array<Ret (*)(F&, const Arg&), sizeof...(Ts)>;
static constexpr RetType build()
{
return RetType{ &Functor<Ts2..., Ts>::call... };
}
};
template <std::size_t N, typename ...Ts, typename...Ts2>
struct Builder<N, std::tuple<Ts...>, Ts2...>
{
template <typename T>
using RecType = Builder<N - 1, std::tuple<Ts...>, Ts2..., T>;
using T0 = typename std::tuple_element<0, std::tuple<Ts...>>::type;
using RetType = std::array<decltype(RecType<T0>::build()), sizeof...(Ts)>;
static constexpr RetType build() {
return RetType{ RecType<Ts>::build()... };
}
};
public:
template <std::size_t N, typename VisitorTuple>
static constexpr auto get()
-> decltype(Builder<N, VisitorTuple>::build())
{
return Builder<N, VisitorTuple>::build();
}
};
template <typename Ret, typename IVisitor, typename F, std::size_t N>
class dispatcher
{
private:
std::array<std::size_t, N> index;
struct visitorCallImpl
{
template <typename T>
void visit(const T&) const
{
*index = get_index_in_tuple<T, IVisitor>::value;
}
void setIndexPtr(std::size_t& index) { this->index = &index; }
private:
std::size_t* index = nullptr;
};
template <std::size_t I, typename Tuple>
void set_index(const Tuple&t)
{
using VisitorType = typename IVisitorImplType<IVisitor, visitorCallImpl>::type;
VisitorType visitor;
visitor.setIndexPtr(index[I]);
std::get<I>(t).accept(visitor);
}
public:
template <typename Tuple, std::size_t ... Is>
Ret operator () (F&& f, const Tuple&t, index_sequence<Is...>)
{
const int dummy[] = {(set_index<Is>(t), 0)...};
static_cast<void>(dummy); // silent the warning unused varaible
constexpr auto a = GetAllOverload<Ret, F&&, Tuple>::
template get<sizeof...(Is), typename IVisitor::tuple_type>();
auto func = multi_array_getter<N>::get(a, index);
return (*func)(f, t);
}
};
} // namespace detail
template <typename Ret, typename Visitor, typename F, typename ... Ts>
Ret dispatch(F&& f, Ts&...args)
{
constexpr std::size_t size = sizeof...(Ts);
detail::dispatcher<Ret, Visitor, F&&, size> d;
return d(std::forward<F>(f), std::tie(args...), make_index_sequence<size>());
}
#endif // multiple dispatch
#if 1 // multiple dispatch usage
struct A;
struct B;
struct C;
struct D;
using IAVisitor = IVisitorTs<A, B, C, D>;
struct A {
virtual ~A() = default;
virtual void accept(IAVisitor& v) const { v.visit(*this); }
};
struct B : A {
virtual void accept(IAVisitor& v) const override { v.visit(*this); }
};
struct C : A {
virtual void accept(IAVisitor& v) const override { v.visit(*this); }
};
struct D : A {
virtual void accept(IAVisitor& v) const override { v.visit(*this); }
};
class Object {
public:
virtual double foo (A*, A*) { std::cout << "Object::foo A,A\n"; return 3.14; }
virtual double foo (B*, B*) { std::cout << "Object::foo B,B\n"; return 3.14; }
virtual double foo (B*, C*) { std::cout << "Object::foo B,C\n"; return 3.14; }
virtual double foo (C*, B*) { std::cout << "Object::foo C,B\n"; return 3.14; }
virtual double foo (C*, C*) { std::cout << "Object::foo C,C\n"; return 3.14; }
virtual char foo (A*, A*, A*) const { std::cout << "Object::foo A,A,A\n"; return '&'; }
virtual char foo (C*, B*, D*) const { std::cout << "Object::foo C,B,D\n"; return '!'; } // Overload of foo with three arguments.
virtual void bar (A*, A*, A*) const { std::cout << "Object::bar A,A,A\n"; }
virtual void bar (B*, B*, B*) const { std::cout << "Object::bar B,B,B\n"; }
virtual void bar (B*, C*, B*) const { std::cout << "Object::bar B,C,B\n"; }
virtual void bar (B*, C*, C*) const { std::cout << "Object::bar B,C,C\n"; }
virtual void bar (B*, C*, D*) const { std::cout << "Object::bar B,C,D\n"; }
virtual void bar (C*, B*, D*) const { std::cout << "Object::bar C,B,D\n"; }
virtual void bar (C*, C*, C*) const { std::cout << "Object::bar C,C,C\n"; }
virtual void bar (D*, B*, C*) const { std::cout << "Object::bar D,B,C\n"; }
double fooMultipleDispatch (A*, A*);
char fooMultipleDispatch (A*, A*, A*);
};
class FooDispatcher
{
public:
explicit FooDispatcher(Object& object) : object(object) {}
template <typename T1, typename T2>
double operator() (T1& a1, T2& a2) const
{
return object.foo(&a1, &a2);
}
template <typename T1, typename T2, typename T3>
char operator() (T1& a1, T2& a2, T3& a3) const
{
return object.foo(&a1, &a2, &a3);
}
private:
Object& object;
};
double Object::fooMultipleDispatch (A* a1, A* a2)
{
return dispatch<double, IAVisitor>(FooDispatcher(*this), *a1, *a2);
}
char Object::fooMultipleDispatch (A* a1, A* a2, A* a3)
{
return dispatch<char, IAVisitor>(FooDispatcher(*this), *a1, *a2, *a3);
}
int main() {
A a_a;
B a_b;
C a_c;
D a_d;
A* a[] = {&a_b, &a_c, &a_d, &a_a};
Object object;
double d = object.foo (a[0], a[1]); // Object::foo A,A (no multiple dispatch)
d = object.fooMultipleDispatch (a[0], a[1]); // Object::foo B,C
std::cout << "d = " << d << std::endl; // 3.14
object.fooMultipleDispatch (a[0], a[3]); // B,A -> so best match is Object::foo A,A
const char k = object.fooMultipleDispatch (a[1], a[0], a[2]); // Object::foo C,B,D
std::cout << "k = " << k << std::endl; // !
}
#endif // multiple dispatch usage
#include <cstdint>
#include <array>
#include <iostream>
#include <tuple>
#include <type_traits>

/////////////////////////

#if 1 // multiple dispatch

// sequence of size_t // not in C++11
template <std::size_t ...> struct index_sequence {};

// Create index_sequence<0, >
template <std::size_t N, std::size_t ...Is>
struct make_index_sequence : make_index_sequence <N - 1, N - 1, Is... > {};

template <std::size_t ... Is>
struct make_index_sequence<0, Is...> : index_sequence<Is...> {};

// Generic IVisitor
// Do: using MyIVisitor = IVisitorTs<Child1, Child2, ...>
template <typename ... Ts> class IVisitorTs;

template <typename T, typename ... Ts>
class IVisitorTs<T, Ts...> : public IVisitorTs<Ts...>
{
public:
    using tuple_type = std::tuple<T, Ts...>;
    using IVisitorTs<Ts...>::visit;

    virtual void visit(const T& t) = 0;
};

template <typename T> class IVisitorTs<T>
{
public:
    using tuple_type = std::tuple<T>;

    virtual void visit(const T& t) = 0;
};

namespace detail {

// retrieve the index of T in Ts...
template <typename T, typename ... Ts> struct get_index;

template <typename T, typename ... Ts>
struct get_index<T, T, Ts...> : std::integral_constant<std::size_t, 0> {};

template <typename T, typename Tail,  typename ... Ts>
struct get_index<T, Tail, Ts...> :
        std::integral_constant < std::size_t, 1 + get_index<T, Ts...>::value > {};

// retrieve the index of T in Tuple<Ts...>
template <typename T, typename Tuple> struct get_index_in_tuple;

template <typename T, template <typename...> class C, typename ... Ts>
struct get_index_in_tuple<T, C<Ts...>> : get_index<T, Ts...> {};

// get element of a multiarray
template <std::size_t I>
struct multi_array_getter
{
    template <typename T, std::size_t N>
    static constexpr auto get(const T& a, const std::array<std::size_t, N>& index)
    -> decltype(multi_array_getter<I - 1>::get(a[index[N - I]], index))
    {
        return multi_array_getter<I - 1>::get(a[index[N - I]], index);
    }
};

template <>
struct multi_array_getter<0>
{
    template <typename T, std::size_t N>
    static constexpr auto get(const T& a, const std::array<std::size_t, N>& index)
    -> decltype(a)
    {
        return a;
    }
};

// Provide an implementation of visitor
// by forwarding to C implementation (which may be non virtual)
template <typename IVisitor, typename C, typename...Ts> struct IVisitorImpl;

template <typename IVisitor, typename C, typename T, typename...Ts>
struct IVisitorImpl<IVisitor, C, T, Ts...> : IVisitorImpl<IVisitor, C, Ts...>
{
    virtual void visit(const T& t) override { C::visit(t); }
};

template <typename IVisitor, typename C, typename T>
struct IVisitorImpl<IVisitor, C, T> : IVisitor, C
{
    virtual void visit(const T& t) override { C::visit(t); }
};

// helper to expand child type to IVisitorImpl
template <typename IVisitor, typename C>
struct IVisitorImplType;

template <typename ... Ts, typename C>
struct IVisitorImplType<IVisitorTs<Ts...>, C>
{
    using type = IVisitorImpl<IVisitorTs<Ts...>, C, Ts...>;
};

// Create an multi array of pointer of function
// (with all combinaisons of overload).
template <typename Ret, typename F, typename Arg>
class GetAllOverload
{
private:
    template <typename...Ts>
    struct Functor
    {
        // function which will be in array.
        static Ret call(F&f, const Arg& arg)
        {
            return call_helper(f, arg, make_index_sequence<sizeof...(Ts)>());
        }
    private:
        // The final dispatched function
        template <std::size_t ... Is>
        static Ret call_helper(F&f, const Arg& arg, index_sequence<Is...>)
        {
            using RetTuple = std::tuple<Ts&...>;
            // static cast is suffisant if arg is the abstract type
            // when given arg is concrete type, reinterpret_cast is required.
            // TODO: build a smaller table with only possible value to avoid that
            return f(reinterpret_cast<typename std::tuple_element<Is, RetTuple>::type>(std::get<Is>(arg))...);
        }
    };

    // helper class to create the multi array of function pointer
    template <std::size_t N, typename Tuple, typename...Ts>
    struct Builder;

    template <typename...Ts, typename...Ts2>
    struct Builder<1, std::tuple<Ts...>, Ts2...>
    {
        using RetType = std::array<Ret (*)(F&, const Arg&), sizeof...(Ts)>;

        static constexpr RetType build()
        {
            return RetType{ &Functor<Ts2..., Ts>::call... };
        }
    };

    template <std::size_t N, typename ...Ts, typename...Ts2>
    struct Builder<N, std::tuple<Ts...>, Ts2...>
    {
        template <typename T>
        using RecType = Builder<N - 1, std::tuple<Ts...>, Ts2..., T>;
        using T0 = typename std::tuple_element<0, std::tuple<Ts...>>::type;
        using RetType = std::array<decltype(RecType<T0>::build()), sizeof...(Ts)>;

        static constexpr RetType build() {
            return RetType{ RecType<Ts>::build()... };
        }
    };

public:
    template <std::size_t N, typename VisitorTuple>
    static constexpr auto get()
    -> decltype(Builder<N, VisitorTuple>::build())
    {
        return Builder<N, VisitorTuple>::build();
    }
};

template <typename Ret, typename IVisitor, typename F, std::size_t N>
class dispatcher
{
private:
    std::array<std::size_t, N> index;

    struct visitorCallImpl
    {
        template <typename T>
        void visit(const T&) const
        {
            *index = get_index_in_tuple<T, IVisitor>::value;
        }

        void setIndexPtr(std::size_t& index) { this->index = &index; }
    private:
        std::size_t* index = nullptr;
    };

    template <std::size_t I, typename Tuple>
    void set_index(const Tuple&t)
    {
        using VisitorType = typename IVisitorImplType<IVisitor, visitorCallImpl>::type;
        VisitorType visitor;
        visitor.setIndexPtr(index[I]);

        std::get<I>(t).accept(visitor);
    }
public:
    template <typename Tuple, std::size_t ... Is>
    Ret operator () (F&& f, const Tuple&t, index_sequence<Is...>)
    {
        const int dummy[] = {(set_index<Is>(t), 0)...};
        static_cast<void>(dummy); // silent the warning unused varaible
        constexpr auto a = GetAllOverload<Ret, F&&, Tuple>::
            template get<sizeof...(Is), typename IVisitor::tuple_type>();
        auto func = multi_array_getter<N>::get(a, index);
        return (*func)(f, t);
    }
};

} // namespace detail

template <typename Ret, typename Visitor, typename F, typename ... Ts>
Ret dispatch(F&& f, Ts&...args)
{
    constexpr std::size_t size = sizeof...(Ts);
    detail::dispatcher<Ret, Visitor, F&&, size> d;
    return d(std::forward<F>(f), std::tie(args...), make_index_sequence<size>());
}

#endif // multiple dispatch

#if 1 // multiple dispatch usage
struct A;
struct B;
struct C;
struct D;


using IAVisitor = IVisitorTs<A, B, C, D>;

struct A {
    virtual ~A() = default;
    virtual void accept(IAVisitor& v) const { v.visit(*this); }
};
struct B : A {
    virtual void accept(IAVisitor& v) const override { v.visit(*this); }
};

struct C : A {
    virtual void accept(IAVisitor& v) const override { v.visit(*this); }
};
struct D : A {
    virtual void accept(IAVisitor& v) const override { v.visit(*this); }
};

class Object {
    public:
        virtual double foo (A*, A*) { std::cout << "Object::foo A,A\n";  return 3.14; }
        virtual double foo (B*, B*) { std::cout << "Object::foo B,B\n";  return 3.14; }
        virtual double foo (B*, C*) { std::cout << "Object::foo B,C\n";  return 3.14; }
        virtual double foo (C*, B*) { std::cout << "Object::foo C,B\n";  return 3.14; }
        virtual double foo (C*, C*) { std::cout << "Object::foo C,C\n";  return 3.14; }
        virtual char foo (A*, A*, A*) const { std::cout << "Object::foo A,A,A\n";  return '&'; }
        virtual char foo (C*, B*, D*) const { std::cout << "Object::foo C,B,D\n";  return '!'; }  // Overload of foo with three arguments.
        virtual void bar (A*, A*, A*) const { std::cout << "Object::bar A,A,A\n"; }
        virtual void bar (B*, B*, B*) const { std::cout << "Object::bar B,B,B\n"; }
        virtual void bar (B*, C*, B*) const { std::cout << "Object::bar B,C,B\n"; }
        virtual void bar (B*, C*, C*) const { std::cout << "Object::bar B,C,C\n"; }
        virtual void bar (B*, C*, D*) const { std::cout << "Object::bar B,C,D\n"; }
        virtual void bar (C*, B*, D*) const { std::cout << "Object::bar C,B,D\n"; }
        virtual void bar (C*, C*, C*) const { std::cout << "Object::bar C,C,C\n"; }
        virtual void bar (D*, B*, C*) const { std::cout << "Object::bar D,B,C\n"; }
        double fooMultipleDispatch (A*, A*);
        char fooMultipleDispatch (A*, A*, A*);
};

class FooDispatcher
{
public:
	explicit FooDispatcher(Object& object) : object(object) {}
	
	template <typename T1, typename T2>
    double operator() (T1& a1, T2& a2) const
    {
    	return object.foo(&a1, &a2);
    }

	template <typename T1, typename T2, typename T3>
    char operator() (T1& a1, T2& a2, T3& a3) const
    {
    	return object.foo(&a1, &a2, &a3);
    }
private:
    Object& object;
};

double Object::fooMultipleDispatch (A* a1, A* a2)
{
	return dispatch<double, IAVisitor>(FooDispatcher(*this), *a1, *a2);
}
char Object::fooMultipleDispatch (A* a1, A* a2, A* a3)
{
	return dispatch<char, IAVisitor>(FooDispatcher(*this), *a1, *a2, *a3);
}


int main() {
	A a_a;
	B a_b;
	C a_c;
	D a_d;
    A* a[] = {&a_b, &a_c, &a_d, &a_a};
    Object object;

    double d = object.foo (a[0], a[1]);  // Object::foo A,A  (no multiple dispatch)
    d = object.fooMultipleDispatch (a[0], a[1]);  // Object::foo B,C
    std::cout << "d = " << d << std::endl;  // 3.14

    object.fooMultipleDispatch (a[0], a[3]);  // B,A -> so best match is Object::foo A,A

    const char k = object.fooMultipleDispatch (a[1], a[0], a[2]);  // Object::foo C,B,D
    std::cout << "k = " << k << std::endl;  // !
}

#endif // multiple dispatch usage
