Template + member function pointers
Author
I have a problem working member function pointers into my template
So I have this:
template <class signature>
class Foo;
and this is good for static functions:
template <class t0, class t1>
class Foo <t0 (t1)>
{
...
}
but I don't know how to work in member functions. I have tried the following
template <class type, class t0, class t1>
class Foo <t0 (type::)(t1)>
{
...
}
but that doesn't work. Any ideas?
This isn't exactly the same as what you are trying to do, but it should help you out:
#ifndef MKH_META_FT_HPP#define MKH_META_FT_HPP#include "Loki/TypeList.h"namespace mkh{ namespace meta { template<typename R, typename T1 = void> struct function_traits; template<typename R> struct function_traits<R (*)(void)> { static const int parameters = 0; static const bool member = false; typedef R (*Functor)(void); typedef R Result; typedef TYPELIST_1(void) Parameters; }; template<typename R, typename T1> struct function_traits<R (*)(T1 t1)> { static const int parameters = 1; static const bool member = false; typedef R (*Functor)(T1); typedef R Result; typedef TYPELIST_1(T1) Parameters; }; template<typename R, typename T1, typename T2> struct function_traits<R (*)(T1 t1, T2 t2)> { static const int parameters = 2; static const bool member = false; typedef R (*Functor)(T1,T2); typedef R Result; typedef TYPELIST_2(T1, T2) Parameters; }; //Member Functions template<typename R, class Cls> struct function_traits<R (Cls::*)(void)> { static const int parameters = 0; static const bool member = true; typedef R (Cls::*Functor)(void); typedef Cls Class; typedef R Result; typedef TYPELIST_1(void) Parameters; }; template<typename R, class Cls, typename T1> struct function_traits<R (Cls::*)(T1 t1)> { static const int parameters = 1; static const bool member = true; typedef R (Cls::*Functor)(T1); typedef Cls Class; typedef R Result; typedef TYPELIST_1(T1) Parameters; }; template<typename R, class Cls, typename T1, typename T2> struct function_traits<R (Cls::*)(T1, T2)> { static const int parameters = 2; static const bool member = true; typedef R (Cls::*Functor)(T1, T2); typedef Cls Class; typedef R Result; typedef TYPELIST_2(T1, T2) Parameters; }; }//ns meta}//ns mkh#endif //MKH_META_FT_HPP
I don't know for sure but by the looks of thing it looks like you could be using std::tr1/boost::function if your not but doing something similar (i.e variable number of template arguments + variable number of template (partial) specializations) i'd recommend using Boost.Preprocessor for all that boilerplate code like in Shannon's example.
This topic is closed to new replies.
Advertisement
Popular Topics
Advertisement
