c++ template specialization for all subclasses

Question

I need to create a template function like this:

template
void foo(T a)
{
   if (T is a subclass of class Bar)
      do this
   else
      d         


        

Answer 1

I know this question has been answered but nobody mentioned that std::enable_if can be used as a second template parameter like this:

#include 

class A {};
class B: public A {};

template::value, int>::type = 0>
int foo(T t)
{
    return 1;
}