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From: Eric Niebler (eric_at_[hidden])
Date: 2005-06-03 22:51:47

Howard Hinnant wrote:
> The scary part is that we do so many useful things these days by
> tentatively passing non-POD's past an ellipses, though only at compile
> time, never at run time. But the compiler is not making that distinction.
> This is a big problem, and I suspect it will need to be addressed at the
> standards level. I don't have a solution yet.

The solution is to not pass non-PODs through ellipses, of course. ;-)

   double is_mem_fun_ptr_tester(...);

   template<typename Class, typename Ret>
   char is_mem_fun_ptr_tester(Ret (Class::**)());

   template<typename T>
   struct is_member_function_pointer
       value = 1==sizeof(is_mem_fun_ptr_tester(static_cast<T*>(0))));

   typedef char test1[
     is_member_function_pointer<void (dummy::*)()>::value ];
   typedef char test2[
     !is_member_function_pointer<dummy>::value ];

Eric Niebler
Boost Consulting

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