How to template'ize variable NAMES, not types?

Question

my question is about how to template\'ize the name of a class member that should be used.

Maybe a simplified & pseudo example:

Answer 1

sellibitze's solution is fine (though to be honest not very: see my edit), only it limits you to using only members of type int. A more general solution would be this (although the member is NOT a template parameter here)

#include 

struct MyClass
{
   int i;
   char c;
};

template 
void DoSomething(std::vector& all, T MyClass::* MemPtr)
{ 
   for(std::vector::size_type i = 0; i < all.size(); ++i)
      (all[i].*MemPtr)++;
}

int main()
{
   std::vector all;
   DoSomething(all, &MyClass::i);
   DoSomething(all, &MyClass::c);
}

EDIT: Also please note that it is not generally a good idea for a pointer to member to be a template parameter inasmuch as only such pointers that are known compile-time can be passed, that is you can't determine the pointer runtime and then pass it as a template param.